目录
14、NotesPreferenceActivity.java
1、AlarmAlertActivity.java
package net.micode.notes.ui;import android.app.Activity;import android.app.AlertDialog;import android.content.Context;import android.content.DialogInterface;import android.content.DialogInterface.OnClickListener;import android.content.DialogInterface.OnDismissListener;import android.content.Intent;import android.media.AudioManager;import android.media.MediaPlayer;import android.media.RingtoneManager;import android.net.Uri;import android.os.Bundle;import android.os.PowerManager;import android.provider.Settings;import android.view.Window;import android.view.WindowManager;import net.micode.notes.R;import net.micode.notes.data.Notes;import net.micode.notes.tool.DataUtils;import java.io.IOException;public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener { private long mNoteId; //文本在数据库存储中的ID号 private String mSnippet; //闹钟提示时出现的文本片段 private static final int SNIPPET_PREW_MAX_LEN = 60; MediaPlayer mPlayer; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //Bundle类型的数据与Map类型的数据相似，都是以key-value的形式存储数据的 //onsaveInstanceState方法是用来保存Activity的状态的 //能从onCreate的参数savedInsanceState中获得状态数据 requestWindowFeature(Window.FEATURE_NO_TITLE); //界面显示——无 final Window win = getWindow(); win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED); if (!isScreenOn()) { win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON //保持窗体点亮 | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON //将窗体点亮 | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON //允许窗体点亮时锁屏 | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR); }//在手机锁屏后如果到了闹钟提示时间，点亮屏幕 Intent intent = getIntent(); try { mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1)); mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId); //根据ID从数据库中获取标签的内容； //getContentResolver（）是实现数据共享，实例存储。 mSnippet = mSnippet.length() > SNIPPET_PREW_MAX_LEN ? mSnippet.substring(0, SNIPPET_PREW_MAX_LEN) + getResources().getString(R.string.notelist_string_info) : mSnippet; //判断标签片段是否达到符合长度 } catch (IllegalArgumentException e) { e.printStackTrace(); return; } mPlayer = new MediaPlayer(); if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) { showActionDialog(); //弹出对话框 playAlarmSound(); //闹钟提示音激发 } else { finish(); //完成闹钟动作 } } private boolean isScreenOn() { //判断屏幕是否锁屏，调用系统函数判断，最后返回值是布尔类型 PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE); return pm.isScreenOn(); } private void playAlarmSound() { //闹钟提示音激发 Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM); //调用系统的铃声管理URI，得到闹钟提示音 int silentModeStreams = Settings.System.getInt(getContentResolver(), Settings.System.MODE_RINGER_STREAMS_AFFECTED, 0); if ((silentModeStreams & (1 << AudioManager.STREAM_ALARM)) != 0) { mPlayer.setAudioStreamType(silentModeStreams); } else { mPlayer.setAudioStreamType(AudioManager.STREAM_ALARM); } try { mPlayer.setDataSource(this, url); //方法：setDataSource(Context context, Uri uri) //解释：无返回值，设置多媒体数据来源【根据 Uri】 mPlayer.prepare(); //准备同步 mPlayer.setLooping(true); //设置是否循环播放 mPlayer.start(); //开始播放 } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); //e.printStackTrace()函数功能是抛出异常， 还将显示出更深的调用信息 //System.out.println(e)，这个方法打印出异常，并且输出在哪里出现的异常 } catch (SecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalStateException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } private void showActionDialog() { AlertDialog.Builder dialog = new AlertDialog.Builder(this); //AlertDialog的构造方法全部是Protected的 //所以不能直接通过new一个AlertDialog来创建出一个AlertDialog。 //要创建一个AlertDialog，就要用到AlertDialog.Builder中的create()方法 //如这里的dialog就是新建了一个AlertDialog dialog.setTitle(R.string.app_name); //为对话框设置 dialog.setMessage(mSnippet); //为对话框设置内容 dialog.setPositiveButton(R.string.notealert_ok, this); //给对话框添加"Yes"按钮 if (isScreenOn()) { dialog.setNegativeButton(R.string.notealert_enter, this); }//对话框添加"No"按钮 dialog.show().setOnDismissListener(this); } public void onClick(DialogInterface dialog, int which) { switch (which) { //用which来选择click后下一步的操作 case DialogInterface.BUTTON_NEGATIVE: //这是取消操作 Intent intent = new Intent(this, NoteEditActivity.class); //实现两个类间的数据传输 intent.setAction(Intent.ACTION_VIEW); //设置动作属性 intent.putExtra(Intent.EXTRA_UID, mNoteId); //实现key-value对 //EXTRA_UID为key；mNoteId为键 startActivity(intent); //开始动作 break; default: //这是确定操作 break; } } public void onDismiss(DialogInterface dialog) { //忽略 stopAlarmSound(); //停止闹钟声音 finish(); //完成该动作 } private void stopAlarmSound() { if (mPlayer != null) { mPlayer.stop(); //停止播放 mPlayer.release(); //释放MediaPlayer对象 mPlayer = null; } }}2、AlarmInitReceiver.java
package net.micode.notes.ui;import android.app.AlarmManager;import android.app.PendingIntent;import android.content.BroadcastReceiver;import android.content.ContentUris;import android.content.Context;import android.content.Intent;import android.database.Cursor;import net.micode.notes.data.Notes;import net.micode.notes.data.Notes.NoteColumns;public class AlarmInitReceiver extends BroadcastReceiver { private static final String [] PROJECTION = new String [] { NoteColumns.ID, NoteColumns.ALERTED_DATE }; //对数据库的操作，调用标签ID和闹钟时间 private static final int COLUMN_ID = 0; private static final int COLUMN_ALERTED_DATE = 1; @Override public void onReceive(Context context, Intent intent) { long currentDate = System.currentTimeMillis(); //System.currentTimeMillis()产生一个当前的毫秒 //这个毫秒其实就是自1970年1月1日0时起的毫秒数 Cursor c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI, PROJECTION, NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE, new String[] { String.valueOf(currentDate) }, //将long变量currentDate转化为字符串 null); //Cursor在这里的作用是通过查找数据库中的标签内容，找到和当前系统时间相等的标签 if (c != null) { if (c.moveToFirst()) { do { long alertDate = c.getLong(COLUMN_ALERTED_DATE); Intent sender = new Intent(context, AlarmReceiver.class); sender.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, c.getLong(COLUMN_ID))); PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, sender, 0); AlarmManager alermManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE); alermManager.set(AlarmManager.RTC_WAKEUP, alertDate, pendingIntent); } while (c.moveToNext()); } c.close(); } //然而通过网上查找资料发现，对于闹钟机制的启动，通常需要上面的几个步骤 //如新建Intent、PendingIntent以及AlarmManager等 //这里就是根据数据库里的闹钟时间创建一个闹钟机制 }}3、AlarmReceiver.java
package net.micode.notes.ui;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;public class AlarmReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { intent.setClass(context, AlarmAlertActivity.class); //启动AlarmAlertActivity intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); //activity要存在于activity的栈中，而非activity的途径启动activity时必然不存在一个activity的栈 //所以要新起一个栈装入启动的activity context.startActivity(intent); }}//这是实现alarm这个功能最接近用户层的包，基于上面的两个包，//作用还需要深究但是对于setClass和addFlags的4、DateTimePicker.java
package net.micode.notes.ui; import java.text.DateFormatSymbols;import java.util.Calendar;import net.micode.notes.R;import android.content.Context;import android.text.format.DateFormat;import android.view.View;import android.widget.FrameLayout;import android.widget.NumberPicker;public class DateTimePicker extends FrameLayout {//FrameLayout是布局模板之一//所有的子元素全部在屏幕的右上方 private static final boolean DEFAULT_ENABLE_STATE = true; private static final int HOURS_IN_HALF_DAY = 12; private static final int HOURS_IN_ALL_DAY = 24; private static final int DAYS_IN_ALL_WEEK = 7; private static final int DATE_SPINNER_MIN_VAL = 0; private static final int DATE_SPINNER_MAX_VAL = DAYS_IN_ALL_WEEK - 1; private static final int HOUR_SPINNER_MIN_VAL_24_HOUR_VIEW = 0; private static final int HOUR_SPINNER_MAX_VAL_24_HOUR_VIEW = 23; private static final int HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW = 1; private static final int HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW = 12; private static final int MINUT_SPINNER_MIN_VAL = 0; private static final int MINUT_SPINNER_MAX_VAL = 59; private static final int AMPM_SPINNER_MIN_VAL = 0; private static final int AMPM_SPINNER_MAX_VAL = 1; //初始化控件 private final NumberPicker mDateSpinner; private final NumberPicker mHourSpinner; private final NumberPicker mMinuteSpinner; private final NumberPicker mAmPmSpinner; //NumberPicker是数字选择器 //这里定义的四个变量全部是在设置闹钟时需要选择的变量（如日期、时、分、上午或者下午） private Calendar mDate; //定义了Calendar类型的变量mDate，用于操作时间 private String[] mDateDisplayValues = new String[DAYS_IN_ALL_WEEK]; private boolean mIsAm; private boolean mIs24HourView; private boolean mIsEnabled = DEFAULT_ENABLE_STATE; private boolean mInitialising; private OnDateTimeChangedListener mOnDateTimeChangedListener; private NumberPicker.OnValueChangeListener mOnDateChangedListener = new NumberPicker.OnValueChangeListener() { @Override public void onValueChange(NumberPicker picker, int oldVal, int newVal) { mDate.add(Calendar.DAY_OF_YEAR, newVal - oldVal); updateDateControl(); onDateTimeChanged(); } };//OnValueChangeListener，这是时间改变监听器，这里主要是对日期的监听 //将现在日期的值传递给mDate；updateDateControl是同步操作 private NumberPicker.OnValueChangeListener mOnHourChangedListener = new NumberPicker.OnValueChangeListener() { //这里是对 小时（Hour） 的监听 @Override public void onValueChange(NumberPicker picker, int oldVal, int newVal) { boolean isDateChanged = false; Calendar cal = Calendar.getInstance(); //声明一个Calendar的变量cal，便于后续的操作 if (!mIs24HourView) { if (!mIsAm && oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY) { cal.setTimeInMillis(mDate.getTimeInMillis()); cal.add(Calendar.DAY_OF_YEAR, 1); isDateChanged = true; //这里是对于12小时制时，晚上11点和12点交替时对日期的更改 } else if (mIsAm && oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) { cal.setTimeInMillis(mDate.getTimeInMillis()); cal.add(Calendar.DAY_OF_YEAR, -1); isDateChanged = true; } //这里是对于12小时制时，凌晨11点和12点交替时对日期的更改 if (oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY || oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) { mIsAm = !mIsAm; updateAmPmControl(); }//这里是对于12小时制时，中午11点和12点交替时对AM和PM的更改 } else { if (oldVal == HOURS_IN_ALL_DAY - 1 && newVal == 0) { cal.setTimeInMillis(mDate.getTimeInMillis()); cal.add(Calendar.DAY_OF_YEAR, 1); isDateChanged = true; //这里是对于24小时制时，晚上11点和12点交替时对日期的更改 } else if (oldVal == 0 && newVal == HOURS_IN_ALL_DAY - 1) { cal.setTimeInMillis(mDate.getTimeInMillis()); cal.add(Calendar.DAY_OF_YEAR, -1); isDateChanged = true; } } //这里是对于12小时制时，凌晨11点和12点交替时对日期的更改 int newHour = mHourSpinner.getValue() % HOURS_IN_HALF_DAY + (mIsAm ? 0 : HOURS_IN_HALF_DAY); //通过数字选择器对newHour的赋值 mDate.set(Calendar.HOUR_OF_DAY, newHour); //通过set函数将新的Hour值传给mDate onDateTimeChanged(); if (isDateChanged) { setCurrentYear(cal.get(Calendar.YEAR)); setCurrentMonth(cal.get(Calendar.MONTH)); setCurrentDay(cal.get(Calendar.DAY_OF_MONTH)); } } }; private NumberPicker.OnValueChangeListener mOnMinuteChangedListener = new NumberPicker.OnValueChangeListener() { @Override //这里是对 分钟（Minute）改变的监听 public void onValueChange(NumberPicker picker, int oldVal, int newVal) { int minValue = mMinuteSpinner.getMinValue(); int maxValue = mMinuteSpinner.getMaxValue(); int offset = 0; //设置offset，作为小时改变的一个记录数据 if (oldVal == maxValue && newVal == minValue) { offset += 1; } else if (oldVal == minValue && newVal == maxValue) { offset -= 1; } //如果原值为59，新值为0，则offset加1 //如果原值为0，新值为59，则offset减1 if (offset != 0) { mDate.add(Calendar.HOUR_OF_DAY, offset); mHourSpinner.setValue(getCurrentHour()); updateDateControl(); int newHour = getCurrentHourOfDay(); if (newHour >= HOURS_IN_HALF_DAY) { mIsAm = false; updateAmPmControl(); } else { mIsAm = true; updateAmPmControl(); } } mDate.set(Calendar.MINUTE, newVal); onDateTimeChanged(); } }; private NumberPicker.OnValueChangeListener mOnAmPmChangedListener = new NumberPicker.OnValueChangeListener() { //对AM和PM的监听 @Override public void onValueChange(NumberPicker picker, int oldVal, int newVal) { mIsAm = !mIsAm; if (mIsAm) { mDate.add(Calendar.HOUR_OF_DAY, -HOURS_IN_HALF_DAY); } else { mDate.add(Calendar.HOUR_OF_DAY, HOURS_IN_HALF_DAY); } updateAmPmControl(); onDateTimeChanged(); } }; public interface OnDateTimeChangedListener { void onDateTimeChanged(DateTimePicker view, int year, int month, int dayOfMonth, int hourOfDay, int minute); } public DateTimePicker(Context context) { this(context, System.currentTimeMillis()); }//通过对数据库的访问，获取当前的系统时间 public DateTimePicker(Context context, long date) { this(context, date, DateFormat.is24HourFormat(context)); }//上面函数的得到的是一个天文数字（1970至今的秒数），需要DateFormat将其变得有意义 public DateTimePicker(Context context, long date, boolean is24HourView) { super(context); //获取系统时间 mDate = Calendar.getInstance(); mInitialising = true; mIsAm = getCurrentHourOfDay() >= HOURS_IN_HALF_DAY; inflate(context, R.layout.datetime_picker, this); //如果当前Activity里用到别的layout，比如对话框layout //还要设置这个layout上的其他组件的内容，就必须用inflate()方法先将对话框的layout找出来 //然后再用findViewById()找到它上面的其它组件 mDateSpinner = (NumberPicker) findViewById(R.id.date); mDateSpinner.setMinValue(DATE_SPINNER_MIN_VAL); mDateSpinner.setMaxValue(DATE_SPINNER_MAX_VAL); mDateSpinner.setOnValueChangedListener(mOnDateChangedListener); mHourSpinner = (NumberPicker) findViewById(R.id.hour); mHourSpinner.setOnValueChangedListener(mOnHourChangedListener); mMinuteSpinner = (NumberPicker) findViewById(R.id.minute); mMinuteSpinner.setMinValue(MINUT_SPINNER_MIN_VAL); mMinuteSpinner.setMaxValue(MINUT_SPINNER_MAX_VAL); mMinuteSpinner.setOnLongPressUpdateInterval(100); mMinuteSpinner.setOnValueChangedListener(mOnMinuteChangedListener); String[] stringsForAmPm = new DateFormatSymbols().getAmPmStrings(); mAmPmSpinner = (NumberPicker) findViewById(R.id.amPm); mAmPmSpinner.setMinValue(AMPM_SPINNER_MIN_VAL); mAmPmSpinner.setMaxValue(AMPM_SPINNER_MAX_VAL); mAmPmSpinner.setDisplayedValues(stringsForAmPm); mAmPmSpinner.setOnValueChangedListener(mOnAmPmChangedListener); // update controls to initial state updateDateControl(); updateHourControl(); updateAmPmControl(); set24HourView(is24HourView); // set to current time setCurrentDate(date); setEnabled(isEnabled()); // set the content descriptions mInitialising = false; } @Override public void setEnabled(boolean enabled) { if (mIsEnabled == enabled) { return; } super.setEnabled(enabled); mDateSpinner.setEnabled(enabled); mMinuteSpinner.setEnabled(enabled); mHourSpinner.setEnabled(enabled); mAmPmSpinner.setEnabled(enabled); mIsEnabled = enabled; } //存在疑问！！！！！！！！！！！！！setEnabled的作用 //下面的代码通过原程序的注释已经比较清晰，另外可以通过函数名来判断 //下面的各函数主要是对上面代码引用到的各函数功能的实现 @Override public boolean isEnabled() { return mIsEnabled; } public long getCurrentDateInTimeMillis() { return mDate.getTimeInMillis(); }//实现函数——得到当前的秒数 public void setCurrentDate(long date) { Calendar cal = Calendar.getInstance(); cal.setTimeInMillis(date); setCurrentDate(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH), cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE)); }//实现函数功能——设置当前的时间，参数是date public void setCurrentDate(int year, int month, int dayOfMonth, int hourOfDay, int minute) { setCurrentYear(year); setCurrentMonth(month); setCurrentDay(dayOfMonth); setCurrentHour(hourOfDay); setCurrentMinute(minute); }//实现函数功能——设置当前的时间，参数是各详细的变量 //下面是得到year、month、day等值 public int getCurrentYear() { return mDate.get(Calendar.YEAR); } public void setCurrentYear(int year) { if (!mInitialising && year == getCurrentYear()) { return; } mDate.set(Calendar.YEAR, year); updateDateControl(); onDateTimeChanged(); } public int getCurrentMonth() { return mDate.get(Calendar.MONTH); } public void setCurrentMonth(int month) { if (!mInitialising && month == getCurrentMonth()) { return; } mDate.set(Calendar.MONTH, month); updateDateControl(); onDateTimeChanged(); } public int getCurrentDay() { return mDate.get(Calendar.DAY_OF_MONTH); } public void setCurrentDay(int dayOfMonth) { if (!mInitialising && dayOfMonth == getCurrentDay()) { return; } mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth); updateDateControl(); onDateTimeChanged(); } public int getCurrentHourOfDay() { return mDate.get(Calendar.HOUR_OF_DAY); } private int getCurrentHour() { if (mIs24HourView){ return getCurrentHourOfDay(); } else { int hour = getCurrentHourOfDay(); if (hour > HOURS_IN_HALF_DAY) { return hour - HOURS_IN_HALF_DAY; } else { return hour == 0 ? HOURS_IN_HALF_DAY : hour; } } } public void setCurrentHour(int hourOfDay) { if (!mInitialising && hourOfDay == getCurrentHourOfDay()) { return; } mDate.set(Calendar.HOUR_OF_DAY, hourOfDay); if (!mIs24HourView) { if (hourOfDay >= HOURS_IN_HALF_DAY) { mIsAm = false; if (hourOfDay > HOURS_IN_HALF_DAY) { hourOfDay -= HOURS_IN_HALF_DAY; } } else { mIsAm = true; if (hourOfDay == 0) { hourOfDay = HOURS_IN_HALF_DAY; } } updateAmPmControl(); } mHourSpinner.setValue(hourOfDay); onDateTimeChanged(); } public int getCurrentMinute() { return mDate.get(Calendar.MINUTE); } public void setCurrentMinute(int minute) { if (!mInitialising && minute == getCurrentMinute()) { return; } mMinuteSpinner.setValue(minute); mDate.set(Calendar.MINUTE, minute); onDateTimeChanged(); } public boolean is24HourView () { return mIs24HourView; } public void set24HourView(boolean is24HourView) { if (mIs24HourView == is24HourView) { return; } mIs24HourView = is24HourView; mAmPmSpinner.setVisibility(is24HourView ? View.GONE : View.VISIBLE); int hour = getCurrentHourOfDay(); updateHourControl(); setCurrentHour(hour); updateAmPmControl(); } private void updateDateControl() { Calendar cal = Calendar.getInstance(); cal.setTimeInMillis(mDate.getTimeInMillis()); cal.add(Calendar.DAY_OF_YEAR, -DAYS_IN_ALL_WEEK / 2 - 1); mDateSpinner.setDisplayedValues(null); for (int i = 0; i < DAYS_IN_ALL_WEEK; ++i) { cal.add(Calendar.DAY_OF_YEAR, 1); mDateDisplayValues[i] = (String) DateFormat.format("MM.dd EEEE", cal); } mDateSpinner.setDisplayedValues(mDateDisplayValues); mDateSpinner.setValue(DAYS_IN_ALL_WEEK / 2); mDateSpinner.invalidate(); }// 对于星期几的算法 private void updateAmPmControl() { if (mIs24HourView) { mAmPmSpinner.setVisibility(View.GONE); } else { int index = mIsAm ? Calendar.AM : Calendar.PM; mAmPmSpinner.setValue(index); mAmPmSpinner.setVisibility(View.VISIBLE); }// 对于上下午操作的算法 } private void updateHourControl() { if (mIs24HourView) { mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_24_HOUR_VIEW); mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_24_HOUR_VIEW); } else { mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW); mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW); }// 对与小时的算法 } public void setOnDateTimeChangedListener(OnDateTimeChangedListener callback) { mOnDateTimeChangedListener = callback; } private void onDateTimeChanged() { if (mOnDateTimeChangedListener != null) { mOnDateTimeChangedListener.onDateTimeChanged(this, getCurrentYear(), getCurrentMonth(), getCurrentDay(), getCurrentHourOfDay(), getCurrentMinute()); } }}5、DateTimePickerDialog.java
package net.micode.notes.ui;import java.util.Calendar;import net.micode.notes.R;import net.micode.notes.ui.DateTimePicker;import net.micode.notes.ui.DateTimePicker.OnDateTimeChangedListener;import android.app.AlertDialog;import android.content.Context;import android.content.DialogInterface;import android.content.DialogInterface.OnClickListener;import android.text.format.DateFormat;import android.text.format.DateUtils;public class DateTimePickerDialog extends AlertDialog implements OnClickListener { private Calendar mDate = Calendar.getInstance(); //创建一个Calendar类型的变量 mDate，方便时间的操作 private boolean mIs24HourView; private OnDateTimeSetListener mOnDateTimeSetListener; //声明一个时间日期滚动选择控件 mOnDateTimeSetListener private DateTimePicker mDateTimePicker; //DateTimePicker控件，控件一般用于让用户可以从日期列表中选择单个值。 //运行时，单击控件边上的下拉箭头，会显示为两个部分：一个下拉列表，一个用于选择日期的 public interface OnDateTimeSetListener { void OnDateTimeSet(AlertDialog dialog, long date); } public DateTimePickerDialog(Context context, long date) { //对该界面对话框的实例化 super(context); //对数据库的操作 mDateTimePicker = new DateTimePicker(context); setView(mDateTimePicker); //添加一个子视图 mDateTimePicker.setOnDateTimeChangedListener(new OnDateTimeChangedListener() { public void onDateTimeChanged(DateTimePicker view, int year, int month, int dayOfMonth, int hourOfDay, int minute) { mDate.set(Calendar.YEAR, year); mDate.set(Calendar.MONTH, month); mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth); mDate.set(Calendar.HOUR_OF_DAY, hourOfDay); mDate.set(Calendar.MINUTE, minute); //将视图中的各选项设置为系统当前时间 updateTitle(mDate.getTimeInMillis()); } }); mDate.setTimeInMillis(date); //得到系统时间 mDate.set(Calendar.SECOND, 0); //将秒数设置为0 mDateTimePicker.setCurrentDate(mDate.getTimeInMillis()); setButton(context.getString(R.string.datetime_dialog_ok), this); setButton2(context.getString(R.string.datetime_dialog_cancel), (OnClickListener)null); //设置按钮 set24HourView(DateFormat.is24HourFormat(this.getContext())); //时间标准化打印 updateTitle(mDate.getTimeInMillis()); } public void set24HourView(boolean is24HourView) { mIs24HourView = is24HourView; } public void setOnDateTimeSetListener(OnDateTimeSetListener callBack) { mOnDateTimeSetListener = callBack; }//将时间日期滚动选择控件实例化 private void updateTitle(long date) { int flag = DateUtils.FORMAT_SHOW_YEAR | DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_TIME; flag |= mIs24HourView ? DateUtils.FORMAT_24HOUR : DateUtils.FORMAT_24HOUR; setTitle(DateUtils.formatDateTime(this.getContext(), date, flag)); }//android开发中常见日期管理工具类（API）——DateUtils：按照上下午显示时间 public void onClick(DialogInterface arg0, int arg1) { if (mOnDateTimeSetListener != null) { mOnDateTimeSetListener.OnDateTimeSet(this, mDate.getTimeInMillis()); } }//第一个参数arg0是接收到点击事件的对话框 //第二个参数arg1是该对话框上的按钮}6、DropdownMenu.java
package net.micode.notes.ui;import android.content.Context;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.PopupMenu;import android.widget.PopupMenu.OnMenuItemClickListener;import net.micode.notes.R;public class DropdownMenu { private Button mButton; private PopupMenu mPopupMenu; //声明一个下拉菜单 private Menu mMenu; public DropdownMenu(Context context, Button button, int menuId) { mButton = button; mButton.setBackgroundResource(R.drawable.dropdown_icon); //设置这个view的背景 mPopupMenu = new PopupMenu(context, mButton); mMenu = mPopupMenu.getMenu(); mPopupMenu.getMenuInflater().inflate(menuId, mMenu); //MenuInflater是用来实例化Menu目录下的Menu布局文件 //根据ID来确认menu的内容选项 mButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { mPopupMenu.show(); } }); } public void setOnDropdownMenuItemClickListener(OnMenuItemClickListener listener) { if (mPopupMenu != null) { mPopupMenu.setOnMenuItemClickListener(listener); }//设置菜单的监听 } public MenuItem findItem(int id) { return mMenu.findItem(id); }//对于菜单选项的初始化，根据索引搜索菜单需要的选项 public void setTitle(CharSequence title) { mButton.setText(title); }//布局文件，设置}7、FoldersListAdapter.java
package net.micode.notes.ui;import android.content.Context;import android.database.Cursor;import android.view.View;import android.view.ViewGroup;import android.widget.CursorAdapter;import android.widget.LinearLayout;import android.widget.TextView;import net.micode.notes.R;import net.micode.notes.data.Notes;import net.micode.notes.data.Notes.NoteColumns;public class FoldersListAdapter extends CursorAdapter {//CursorAdapter是Cursor和ListView的接口//FoldersListAdapter继承了CursorAdapter的类//主要作用是便签数据库和用户的交互//这里就是用folder（文件夹）的形式展现给用户 public static final String [] PROJECTION = { NoteColumns.ID, NoteColumns.SNIPPET };//调用数据库中便签的ID和片段 public static final int ID_COLUMN = 0; public static final int NAME_COLUMN = 1; public FoldersListAdapter(Context context, Cursor c) { super(context, c); // TODO Auto-generated constructor stub }//数据库操作 @Override public View newView(Context context, Cursor cursor, ViewGroup parent) { //ViewGroup是容器 return new FolderListItem(context); }//创建一个文件夹，对于各文件夹中子标签的初始化 @Override public void bindView(View view, Context context, Cursor cursor) { if (view instanceof FolderListItem) { String folderName = (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN); ((FolderListItem) view).bind(folderName); } }//将各个布局文件绑定起来 public String getFolderName(Context context, int position) { Cursor cursor = (Cursor) getItem(position); return (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN); }//根据数据库中标签的ID得到标签的各项内容 private class FolderListItem extends LinearLayout { private TextView mName; public FolderListItem(Context context) { super(context); //操作数据库 inflate(context, R.layout.folder_list_item, this); //根据布局文件的名字等信息将其找出来 mName = (TextView) findViewById(R.id.tv_folder_name); } public void bind(String name) { mName.setText(name); } }}8、NoteEditActivity.java
package net.micode.notes.ui; import android.app.Activity;import android.app.AlarmManager;import android.app.AlertDialog;import android.app.PendingIntent;import android.app.SearchManager;import android.appwidget.AppWidgetManager;import android.content.ContentUris;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.content.SharedPreferences;import android.graphics.Paint;import android.os.Bundle;import android.preference.PreferenceManager;import android.text.Spannable;import android.text.SpannableString;import android.text.TextUtils;import android.text.format.DateUtils;import android.text.style.BackgroundColorSpan;import android.util.Log;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.MotionEvent;import android.view.View;import android.view.View.OnClickListener;import android.view.WindowManager;import android.widget.CheckBox;import android.widget.CompoundButton;import android.widget.CompoundButton.OnCheckedChangeListener;import android.widget.EditText;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.TextView;import android.widget.Toast;import net.micode.notes.R;import net.micode.notes.data.Notes;import net.micode.notes.data.Notes.TextNote;import net.micode.notes.model.WorkingNote;import net.micode.notes.model.WorkingNote.NoteSettingChangedListener;import net.micode.notes.tool.DataUtils;import net.micode.notes.tool.ResourceParser;import net.micode.notes.tool.ResourceParser.TextAppearanceResources;import net.micode.notes.ui.DateTimePickerDialog.OnDateTimeSetListener;import net.micode.notes.ui.NoteEditText.OnTextViewChangeListener;import net.micode.notes.widget.NoteWidgetProvider_2x;import net.micode.notes.widget.NoteWidgetProvider_4x;import java.util.HashMap;import java.util.HashSet;import java.util.Map;import java.util.regex.Matcher;import java.util.regex.Pattern;public class NoteEditActivity extends Activity implements OnClickListener, NoteSettingChangedListener, OnTextViewChangeListener {//该类主要是针对标签的编辑//继承了系统内部许多和监听有关的类 private class HeadViewHolder { public TextView tvModified; public ImageView ivAlertIcon; public TextView tvAlertDate; public ImageView ibSetBgColor; } //使用Map实现数据存储 private static final Map sBgSelectorBtnsMap = new HashMap(); static { sBgSelectorBtnsMap.put(R.id.iv_bg_yellow, ResourceParser.YELLOW); sBgSelectorBtnsMap.put(R.id.iv_bg_red, ResourceParser.RED); sBgSelectorBtnsMap.put(R.id.iv_bg_blue, ResourceParser.BLUE); sBgSelectorBtnsMap.put(R.id.iv_bg_green, ResourceParser.GREEN); sBgSelectorBtnsMap.put(R.id.iv_bg_white, ResourceParser.WHITE); //put函数是将指定值和指定键相连 } private static final Map sBgSelectorSelectionMap = new HashMap(); static { sBgSelectorSelectionMap.put(ResourceParser.YELLOW, R.id.iv_bg_yellow_select); sBgSelectorSelectionMap.put(ResourceParser.RED, R.id.iv_bg_red_select); sBgSelectorSelectionMap.put(ResourceParser.BLUE, R.id.iv_bg_blue_select); sBgSelectorSelectionMap.put(ResourceParser.GREEN, R.id.iv_bg_green_select); sBgSelectorSelectionMap.put(ResourceParser.WHITE, R.id.iv_bg_white_select); //put函数是将指定值和指定键相连 } private static final Map sFontSizeBtnsMap = new HashMap(); static { sFontSizeBtnsMap.put(R.id.ll_font_large, ResourceParser.TEXT_LARGE); sFontSizeBtnsMap.put(R.id.ll_font_small, ResourceParser.TEXT_SMALL); sFontSizeBtnsMap.put(R.id.ll_font_normal, ResourceParser.TEXT_MEDIUM); sFontSizeBtnsMap.put(R.id.ll_font_super, ResourceParser.TEXT_SUPER); //put函数是将指定值和指定键相连 } private static final Map sFontSelectorSelectionMap = new HashMap(); static { sFontSelectorSelectionMap.put(ResourceParser.TEXT_LARGE, R.id.iv_large_select); sFontSelectorSelectionMap.put(ResourceParser.TEXT_SMALL, R.id.iv_small_select); sFontSelectorSelectionMap.put(ResourceParser.TEXT_MEDIUM, R.id.iv_medium_select); sFontSelectorSelectionMap.put(ResourceParser.TEXT_SUPER, R.id.iv_super_select); //put函数是将指定值和指定键相连 } private static final String TAG = "NoteEditActivity"; private HeadViewHolder mNoteHeaderHolder; private View mHeadViewPanel; //私有化一个界面操作mHeadViewPanel，对表头的操作 private View mNoteBgColorSelector; //私有化一个界面操作mNoteBgColorSelector，对背景颜色的操作 private View mFontSizeSelector; //私有化一个界面操作mFontSizeSelector，对标签字体的操作 private EditText mNoteEditor; //声明编辑控件，对文本操作 private View mNoteEditorPanel; //私有化一个界面操作mNoteEditorPanel，文本编辑的控制板 //private WorkingNote mWorkingNote; public WorkingNote mWorkingNote; //对模板WorkingNote的初始化 private SharedPreferences mSharedPrefs; //私有化SharedPreferences的数据存储方式 //它的本质是基于XML文件存储key-value键值对数据 private int mFontSizeId; //用于操作字体的大小 private static final String PREFERENCE_FONT_SIZE = "pref_font_size"; private static final int SHORTCUT_ICON_TITLE_MAX_LEN = 10; public static final String TAG_CHECKED = String.valueOf('\u221A'); public static final String TAG_UNCHECKED = String.valueOf('\u25A1'); private LinearLayout mEditTextList; //线性布局 private String mUserQuery; private Pattern mPattern; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.setContentView(R.layout.note_edit); //对数据库的访问操作 if (savedInstanceState == null && !initActivityState(getIntent())) { finish(); return; } initResources(); } @Override protected void onRestoreInstanceState(Bundle savedInstanceState) { super.onRestoreInstanceState(savedInstanceState); if (savedInstanceState != null && savedInstanceState.containsKey(Intent.EXTRA_UID)) { Intent intent = new Intent(Intent.ACTION_VIEW); intent.putExtra(Intent.EXTRA_UID, savedInstanceState.getLong(Intent.EXTRA_UID)); if (!initActivityState(intent)) { finish(); return; } Log.d(TAG, "Restoring from killed activity"); }//为防止内存不足时程序的终止，在这里有一个保存现场的函数 } private boolean initActivityState(Intent intent) { mWorkingNote = null; if (TextUtils.equals(Intent.ACTION_VIEW, intent.getAction())) { long noteId = intent.getLongExtra(Intent.EXTRA_UID, 0); mUserQuery = ""; //如果用户实例化标签时，系统并未给出标签ID //根据键值查找ID if (intent.hasExtra(SearchManager.EXTRA_DATA_KEY)) { noteId = Long.parseLong(intent.getStringExtra(SearchManager.EXTRA_DATA_KEY)); mUserQuery = intent.getStringExtra(SearchManager.USER_QUERY); } //如果ID在数据库中未找到 if (!DataUtils.visibleInNoteDatabase(getContentResolver(), noteId, Notes.TYPE_NOTE)) { Intent jump = new Intent(this, NotesListActivity.class); startActivity(jump); //程序将跳转到上面声明的intent——jump showToast(R.string.error_note_not_exist); finish(); return false; } //ID在数据库中找到 else { mWorkingNote = WorkingNote.load(this, noteId); if (mWorkingNote == null) { Log.e(TAG, "load note failed with note id" + noteId); //打印出红色的错误信息 finish(); return false; } } //setSoftInputMode——软键盘输入模式 getWindow().setSoftInputMode( WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN| WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE); } else if(TextUtils.equals(Intent.ACTION_INSERT_OR_EDIT, intent.getAction())) { // intent.getAction() // 大多用于broadcast发送广播时给机制（intent）设置一个action，就是一个字符串 // 用户可以通过receive（接受）intent，通过 getAction得到的字符串，来决定做什么 long folderId = intent.getLongExtra(Notes.INTENT_EXTRA_FOLDER_ID, 0); int widgetId = intent.getIntExtra(Notes.INTENT_EXTRA_WIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID); int widgetType = intent.getIntExtra(Notes.INTENT_EXTRA_WIDGET_TYPE, Notes.TYPE_WIDGET_INVALIDE); int bgResId = intent.getIntExtra(Notes.INTENT_EXTRA_BACKGROUND_ID, ResourceParser.getDefaultBgId(this)); // intent.getInt（Long、String）Extra是对各变量的语法分析 // Parse call-record note String phoneNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER); long callDate = intent.getLongExtra(Notes.INTENT_EXTRA_CALL_DATE, 0); if (callDate != 0 && phoneNumber != null) { if (TextUtils.isEmpty(phoneNumber)) { Log.w(TAG, "The call record number is null"); } long noteId = 0; if ((noteId = DataUtils.getNoteIdByPhoneNumberAndCallDate(getContentResolver(), phoneNumber, callDate)) > 0) { mWorkingNote = WorkingNote.load(this, noteId); if (mWorkingNote == null) { Log.e(TAG, "load call note failed with note id" + noteId); finish(); return false; } //将电话号码与手机的号码簿相关 } else { mWorkingNote = WorkingNote.createEmptyNote(this, folderId, widgetId,widgetType, bgResId); mWorkingNote.convertToCallNote(phoneNumber, callDate); // } } else { mWorkingNote = WorkingNote.createEmptyNote(this, folderId, widgetId, widgetType, bgResId); }//创建一个新的WorkingNote getWindow().setSoftInputMode( WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE| WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE); } else { Log.e(TAG, "Intent not specified action, should not support"); finish(); return false; } mWorkingNote.setOnSettingStatusChangedListener(this); return true; } @Override protected void onResume() { super.onResume(); initNoteScreen(); } private void initNoteScreen() { //对界面的初始化操作 mNoteEditor.setTextAppearance(this, TextAppearanceResources .getTexAppearanceResource(mFontSizeId)); //设置外观 if (mWorkingNote.getCheckListMode() == TextNote.MODE_CHECK_LIST) { switchToListMode(mWorkingNote.getContent()); } else { mNoteEditor.setText(getHighlightQueryResult(mWorkingNote.getContent(), mUserQuery)); mNoteEditor.setSelection(mNoteEditor.getText().length()); } for (Integer id : sBgSelectorSelectionMap.keySet()) { findViewById(sBgSelectorSelectionMap.get(id)).setVisibility(View.GONE); } mHeadViewPanel.setBackgroundResource(mWorkingNote.getTitleBgResId()); mNoteEditorPanel.setBackgroundResource(mWorkingNote.getBgColorResId()); mNoteHeaderHolder.tvModified.setText(DateUtils.formatDateTime(this, mWorkingNote.getModifiedDate(), DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_NUMERIC_DATE | DateUtils.FORMAT_SHOW_TIME | DateUtils.FORMAT_SHOW_YEAR)); showAlertHeader(); } //设置闹钟的显示 private void showAlertHeader() { if (mWorkingNote.hasClockAlert()) { long time = System.currentTimeMillis(); if (time > mWorkingNote.getAlertDate()) { mNoteHeaderHolder.tvAlertDate.setText(R.string.note_alert_expired); } //如果系统时间大于了闹钟设置的时间，那么闹钟失效 else { mNoteHeaderHolder.tvAlertDate.setText(DateUtils.getRelativeTimeSpanString( mWorkingNote.getAlertDate(), time, DateUtils.MINUTE_IN_MILLIS)); } mNoteHeaderHolder.tvAlertDate.setVisibility(View.VISIBLE); mNoteHeaderHolder.ivAlertIcon.setVisibility(View.VISIBLE); //显示闹钟开启的图标 } else { mNoteHeaderHolder.tvAlertDate.setVisibility(View.GONE); mNoteHeaderHolder.ivAlertIcon.setVisibility(View.GONE); }; } @Override protected void onNewIntent(Intent intent) { super.onNewIntent(intent); initActivityState(intent); } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); if (!mWorkingNote.existInDatabase()) { saveNote(); } //在创建一个新的标签时，先在数据库中匹配 //如果不存在，那么先在数据库中存储 outState.putLong(Intent.EXTRA_UID, mWorkingNote.getNoteId()); Log.d(TAG, "Save working note id: " + mWorkingNote.getNoteId() + " onSaveInstanceState"); } @Override //MotionEvent是对屏幕触控的传递机制 public boolean dispatchTouchEvent(MotionEvent ev) { if (mNoteBgColorSelector.getVisibility() == View.VISIBLE && !inRangeOfView(mNoteBgColorSelector, ev)) { mNoteBgColorSelector.setVisibility(View.GONE); return true; }//颜色选择器在屏幕上可见 if (mFontSizeSelector.getVisibility() == View.VISIBLE && !inRangeOfView(mFontSizeSelector, ev)) { mFontSizeSelector.setVisibility(View.GONE); return true; }//字体大小选择器在屏幕上可见 return super.dispatchTouchEvent(ev); } //对屏幕触控的坐标进行操作 private boolean inRangeOfView(View view, MotionEvent ev) { int []location = new int[2]; view.getLocationOnScreen(location); int x = location[0]; int y = location[1]; if (ev.getX() < x || ev.getX() > (x + view.getWidth()) || ev.getY() < y || ev.getY() > (y + view.getHeight())) //如果触控的位置超出了给定的范围，返回false { return false; } return true; } private void initResources() { mHeadViewPanel = findViewById(R.id.note_title); mNoteHeaderHolder = new HeadViewHolder(); mNoteHeaderHolder.tvModified = (TextView) findViewById(R.id.tv_modified_date); mNoteHeaderHolder.ivAlertIcon = (ImageView) findViewById(R.id.iv_alert_icon); mNoteHeaderHolder.tvAlertDate = (TextView) findViewById(R.id.tv_alert_date); mNoteHeaderHolder.ibSetBgColor = (ImageView) findViewById(R.id.btn_set_bg_color); mNoteHeaderHolder.ibSetBgColor.setOnClickListener(this); mNoteEditor = (EditText) findViewById(R.id.note_edit_view); mNoteEditorPanel = findViewById(R.id.sv_note_edit); mNoteBgColorSelector = findViewById(R.id.note_bg_color_selector); for (int id : sBgSelectorBtnsMap.keySet()) { ImageView iv = (ImageView) findViewById(id); iv.setOnClickListener(this); }//对标签各项属性内容的初始化 mFontSizeSelector = findViewById(R.id.font_size_selector); for (int id : sFontSizeBtnsMap.keySet()) { View view = findViewById(id); view.setOnClickListener(this); };//对字体大小的选择 mSharedPrefs = PreferenceManager.getDefaultSharedPreferences(this); mFontSizeId = mSharedPrefs.getInt(PREFERENCE_FONT_SIZE, ResourceParser.BG_DEFAULT_FONT_SIZE); if(mFontSizeId >= TextAppearanceResources.getResourcesSize()) { mFontSizeId = ResourceParser.BG_DEFAULT_FONT_SIZE; } mEditTextList = (LinearLayout) findViewById(R.id.note_edit_list); } @Override protected void onPause() { super.onPause(); if(saveNote()) { Log.d(TAG, "Note data was saved with length:" + mWorkingNote.getContent().length()); } clearSettingState(); } //和桌面小工具的同步 private void updateWidget() { Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE); if (mWorkingNote.getWidgetType() == Notes.TYPE_WIDGET_2X) { intent.setClass(this, NoteWidgetProvider_2x.class); } else if (mWorkingNote.getWidgetType() == Notes.TYPE_WIDGET_4X) { intent.setClass(this, NoteWidgetProvider_4x.class); } else { Log.e(TAG, "Unspported widget type"); return; } intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[] { mWorkingNote.getWidgetId() }); sendBroadcast(intent); setResult(RESULT_OK, intent); } public void onClick(View v) { int id = v.getId(); if (id == R.id.btn_set_bg_color) { mNoteBgColorSelector.setVisibility(View.VISIBLE); findViewById(sBgSelectorSelectionMap.get(mWorkingNote.getBgColorId())).setVisibility( - View.VISIBLE); } else if (sBgSelectorBtnsMap.containsKey(id)) { findViewById(sBgSelectorSelectionMap.get(mWorkingNote.getBgColorId())).setVisibility( View.GONE); mWorkingNote.setBgColorId(sBgSelectorBtnsMap.get(id)); mNoteBgColorSelector.setVisibility(View.GONE); } else if (sFontSizeBtnsMap.containsKey(id)) { findViewById(sFontSelectorSelectionMap.get(mFontSizeId)).setVisibility(View.GONE); mFontSizeId = sFontSizeBtnsMap.get(id); mSharedPrefs.edit().putInt(PREFERENCE_FONT_SIZE, mFontSizeId).commit(); findViewById(sFontSelectorSelectionMap.get(mFontSizeId)).setVisibility(View.VISIBLE); if (mWorkingNote.getCheckListMode() == TextNote.MODE_CHECK_LIST) { getWorkingText(); switchToListMode(mWorkingNote.getContent()); } else { mNoteEditor.setTextAppearance(this, TextAppearanceResources.getTexAppearanceResource(mFontSizeId)); } mFontSizeSelector.setVisibility(View.GONE); } }/ public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { //根据菜单的id来编剧相关项目 case R.id.menu_new_note: //创建一个新的便签 createNewNote(); break; case R.id.menu_delete: //删除便签 AlertDialog.Builder builder = new AlertDialog.Builder(this); //创建关于删除操作的对话框 builder.setTitle(getString(R.string.alert_title_delete)); // 设置标签的为alert_title_delete builder.setIcon(android.R.drawable.ic_dialog_alert); //设置对话框图标 builder.setMessage(getString(R.string.alert_message_delete_note)); //设置对话框内容 builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { //建立按键监听器public void onClick(DialogInterface dialog, int which) {//点击所触发事件 deleteCurrentNote(); // 删除单签便签 finish();} }); //添加“YES”按钮 builder.setNegativeButton(android.R.string.cancel, null); //添加“NO”的按钮 builder.show(); //显示对话框 break; case R.id.menu_font_size: //字体大小的编辑 mFontSizeSelector.setVisibility(View.VISIBLE); // 将字体选择器置为可见 findViewById(sFontSelectorSelectionMap.get(mFontSizeId)).setVisibility(View.VISIBLE); // 通过id找到相应的大小 break; case R.id.menu_list_mode: //选择列表模式 mWorkingNote.setCheckListMode(mWorkingNote.getCheckListMode() == 0 ? TextNote.MODE_CHECK_LIST : 0); break; case R.id.menu_share: //菜单共享 getWorkingText(); sendTo(this, mWorkingNote.getContent()); // 用sendto函数将运行文本发送到遍历的本文内 break; case R.id.menu_send_to_desktop: //发送到桌面 sendToDesktop(); break; case R.id.menu_alert: //创建提醒器 setReminder(); break; case R.id.menu_delete_remind: //删除日期提醒 mWorkingNote.setAlertDate(0, false); break; default: break; } return true; } private void setReminder() { DateTimePickerDialog d = new DateTimePickerDialog(this, System.currentTimeMillis()); // 建立修改时间日期的对话框 d.setOnDateTimeSetListener(new OnDateTimeSetListener() { public void OnDateTimeSet(AlertDialog dialog, long date) { mWorkingNote.setAlertDate(date, true); //选择提醒的日期 } }); //建立时间日期的监听器 d.show(); //显示对话框 } private void sendTo(Context context, String info) { Intent intent = new Intent(Intent.ACTION_SEND); //建立intent链接选项 intent.putExtra(Intent.EXTRA_TEXT, info); //将需要传递的便签信息放入text文件中 intent.setType("text/plain"); //编辑连接器的类型 context.startActivity(intent); //在acti中进行链接 } private void createNewNote() { // Firstly, save current editing notes //保存当前便签 saveNote(); // For safety, start a new NoteEditActivity finish(); Intent intent = new Intent(this, NoteEditActivity.class); //设置链接器 intent.setAction(Intent.ACTION_INSERT_OR_EDIT); //该活动定义为创建或编辑 intent.putExtra(Notes.INTENT_EXTRA_FOLDER_ID, mWorkingNote.getFolderId()); //将运行便签的id添加到INTENT_EXTRA_FOLDER_ID标记中 startActivity(intent); //开始activity并链接 } private void deleteCurrentNote() { if (mWorkingNote.existInDatabase()) { //假如当前运行的便签内存有数据 HashSet ids = new HashSet(); long id = mWorkingNote.getNoteId(); if (id != Notes.ID_ROOT_FOLDER) { ids.add(id); //如果不是头文件夹建立一个hash表把便签id存起来 } else { Log.d(TAG, "Wrong note id, should not happen"); //否则报错 } if (!isSyncMode()) { //在非同步模式情况下 //删除操作 if (!DataUtils.batchDeleteNotes(getContentResolver(), ids)) { Log.e(TAG, "Delete Note error"); } } else { //同步模式 //移动至垃圾文件夹的操作 if (!DataUtils.batchMoveToFolder(getContentResolver(), ids, Notes.ID_TRASH_FOLER)) { Log.e(TAG, "Move notes to trash folder error, should not happens"); } } } mWorkingNote.markDeleted(true); //将这些标签的删除标记置为true } private boolean isSyncMode() { return NotesPreferenceActivity.getSyncAccountName(this).trim().length() > 0; } public void onClockAlertChanged(long date, boolean set) { if (!mWorkingNote.existInDatabase()) { //首先保存已有的便签 saveNote(); } if (mWorkingNote.getNoteId() > 0) { Intent intent = new Intent(this, AlarmReceiver.class); intent.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, mWorkingNote.getNoteId())); //若有有运行的便签就是建立一个链接器将标签id都存在uri中 PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0); AlarmManager alarmManager = ((AlarmManager) getSystemService(ALARM_SERVICE)); //设置提醒管理器 showAlertHeader(); if(!set) { alarmManager.cancel(pendingIntent); } else { alarmManager.set(AlarmManager.RTC_WAKEUP, date, pendingIntent); } //如果用户设置了时间，就通过提醒管理器设置一个监听事项 } else { //没有运行的便签就报错 Log.e(TAG, "Clock alert setting error"); showToast(R.string.error_note_empty_for_clock); } } public void onWidgetChanged() { updateWidget();//更新Widget } public void onEditTextDelete(int index, String text) { int childCount = mEditTextList.getChildCount(); if (childCount == 1) { return; } //没有编辑框的话直接返回 for (int i = index + 1; i < childCount; i++) { ((NoteEditText) mEditTextList.getChildAt(i).findViewById(R.id.et_edit_text)) .setIndex(i - 1); //通过id把编辑框存在便签编辑框中 } mEditTextList.removeViewAt(index); //删除特定位置的视图 NoteEditText edit = null; if(index == 0) { edit = (NoteEditText) mEditTextList.getChildAt(0).findViewById( R.id.et_edit_text); } else { edit = (NoteEditText) mEditTextList.getChildAt(index - 1).findViewById( R.id.et_edit_text); } //通过id把编辑框存在空的NoteEditText中 int length = edit.length(); edit.append(text); edit.requestFocus();//请求优先完成该此 编辑 edit.setSelection(length);//定位到length位置处的条目 } public void onEditTextEnter(int index, String text) { if(index > mEditTextList.getChildCount()) { Log.e(TAG, "Index out of mEditTextList boundrary, should not happen"); //越界把偶偶 } View view = getListItem(text, index); mEditTextList.addView(view, index); //建立一个新的视图并添加到编辑文本框内 NoteEditText edit = (NoteEditText) view.findViewById(R.id.et_edit_text); edit.requestFocus();//请求优先操作 edit.setSelection(0);//定位到起始位置 for (int i = index + 1; i < mEditTextList.getChildCount(); i++) { ((NoteEditText) mEditTextList.getChildAt(i).findViewById(R.id.et_edit_text)) .setIndex(i); //遍历子文本框并设置对应对下标 } } private void switchToListMode(String text) { mEditTextList.removeAllViews(); String[] items = text.split("\n"); int index = 0; //清空所有视图，初始化下标 for (String item : items) { if(!TextUtils.isEmpty(item)) { mEditTextList.addView(getListItem(item, index)); index++; //遍历所有文本单元并添加到文本框中 } } mEditTextList.addView(getListItem("", index)); mEditTextList.getChildAt(index).findViewById(R.id.et_edit_text).requestFocus(); //优先请求此操作 mNoteEditor.setVisibility(View.GONE); //便签编辑器不可见 mEditTextList.setVisibility(View.VISIBLE); //将文本编辑框置为可见 } private Spannable getHighlightQueryResult(String fullText, String userQuery) { SpannableString spannable = new SpannableString(fullText == null ? "" : fullText); //新建一个效果选项 if (!TextUtils.isEmpty(userQuery)) { mPattern = Pattern.compile(userQuery); //将用户的询问进行解析 Matcher m = mPattern.matcher(fullText); //建立一个状态机检查Pattern并进行匹配 int start = 0; while (m.find(start)) { spannable.setSpan( new BackgroundColorSpan(this.getResources().getColor( R.color.user_query_highlight)), m.start(), m.end(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE); //设置背景颜色 start = m.end(); //跟新起始位置 } } return spannable; } private View getListItem(String item, int index) { View view = LayoutInflater.from(this).inflate(R.layout.note_edit_list_item, null); //创建一个视图 final NoteEditText edit = (NoteEditText) view.findViewById(R.id.et_edit_text); edit.setTextAppearance(this, TextAppearanceResources.getTexAppearanceResource(mFontSizeId)); //创建一个文本编辑框并设置可见性 CheckBox cb = ((CheckBox) view.findViewById(R.id.cb_edit_item)); cb.setOnCheckedChangeListener(new OnCheckedChangeListener() { public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (isChecked) { edit.setPaintFlags(edit.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG); } else { edit.setPaintFlags(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG); } } }); //建立一个打钩框并设置监听器 if (item.startsWith(TAG_CHECKED)) { //选择勾选 cb.setChecked(true); edit.setPaintFlags(edit.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG); item = item.substring(TAG_CHECKED.length(), item.length()).trim(); } else if (item.startsWith(TAG_UNCHECKED)) { //选择不勾选 cb.setChecked(false); edit.setPaintFlags(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG); item = item.substring(TAG_UNCHECKED.length(), item.length()).trim(); } edit.setOnTextViewChangeListener(this); edit.setIndex(index); edit.setText(getHighlightQueryResult(item, mUserQuery)); //运行编辑框的监听器对该行为作出反应，并设置下标及文本内容 return view; } public void onTextChange(int index, boolean hasText) { if (index >= mEditTextList.getChildCount()) { Log.e(TAG, "Wrong index, should not happen"); return; //越界报错 } if(hasText) { mEditTextList.getChildAt(index).findViewById(R.id.cb_edit_item).setVisibility(View.VISIBLE); } else { mEditTextList.getChildAt(index).findViewById(R.id.cb_edit_item).setVisibility(View.GONE); } //如果内容不为空则将其子编辑框可见性置为可见，否则不可见 } public void onCheckListModeChanged(int oldMode, int newMode) { if (newMode == TextNote.MODE_CHECK_LIST) { switchToListMode(mNoteEditor.getText().toString()); //检查模式切换到列表模式 } else { if (!getWorkingText()) { mWorkingNote.setWorkingText(mWorkingNote.getContent().replace(TAG_UNCHECKED + " ", "")); } //若是获取到文本就改变其检查标记 mNoteEditor.setText(getHighlightQueryResult(mWorkingNote.getContent(), mUserQuery)); mEditTextList.setVisibility(View.GONE); mNoteEditor.setVisibility(View.VISIBLE); //修改文本编辑器的内容和可见性 } } private boolean getWorkingText() { boolean hasChecked = false; //初始化check标记 if (mWorkingNote.getCheckListMode() == TextNote.MODE_CHECK_LIST) { // 若模式为CHECK_LIST StringBuilder sb = new StringBuilder(); //创建可变字符串 for (int i = 0; i < mEditTextList.getChildCount(); i++) { View view = mEditTextList.getChildAt(i); //遍历所有子编辑框的视图 NoteEditText edit = (NoteEditText) view.findViewById(R.id.et_edit_text); if (!TextUtils.isEmpty(edit.getText())) { //若文本不为空 if (((CheckBox) view.findViewById(R.id.cb_edit_item)).isChecked()) { //该选项框已打钩 sb.append(TAG_CHECKED).append(" ").append(edit.getText()).append("\n"); hasChecked = true; //扩展字符串为已打钩并把标记置true } else { sb.append(TAG_UNCHECKED).append(" ").append(edit.getText()).append("\n"); //扩展字符串添加未打钩 } } } mWorkingNote.setWorkingText(sb.toString()); //利用编辑好的字符串设置运行便签的内容 } else { mWorkingNote.setWorkingText(mNoteEditor.getText().toString()); // 若不是该模式直接用编辑器中的内容设置运行中标签的内容 } return hasChecked; } private boolean saveNote() { getWorkingText(); boolean saved = mWorkingNote.saveNote(); //运行 getWorkingText()之后保存 if (saved) { //如英文注释所说链接RESULT_OK是为了识别保存的2种情况，一是创建后保存，二是修改后保存 setResult(RESULT_OK); } return saved; } private void sendToDesktop() { if (!mWorkingNote.existInDatabase()) { saveNote(); //若不存在数据也就是新的标签就保存起来先 } if (mWorkingNote.getNoteId() > 0) { //若是有内容 Intent sender = new Intent(); Intent shortcutIntent = new Intent(this, NoteEditActivity.class); //建立发送到桌面的连接器 shortcutIntent.setAction(Intent.ACTION_VIEW); //链接为一个视图 shortcutIntent.putExtra(Intent.EXTRA_UID, mWorkingNote.getNoteId()); sender.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent); sender.putExtra(Intent.EXTRA_SHORTCUT_NAME, makeShortcutIconTitle(mWorkingNote.getContent())); sender.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, Intent.ShortcutIconResource.fromContext(this, R.drawable.icon_app)); sender.putExtra("duplicate", true); //将便签的相关信息都添加到要发送的文件里 sender.setAction("com.android.launcher.action.INSTALL_SHORTCUT"); //设置sneder的行为是发送 showToast(R.string.info_note_enter_desktop); sendBroadcast(sender); //显示到桌面 } else { Log.e(TAG, "Send to desktop error"); showToast(R.string.error_note_empty_for_send_to_desktop); //空便签直接报错 } } private String makeShortcutIconTitle(String content) { content = content.replace(TAG_CHECKED, ""); content = content.replace(TAG_UNCHECKED, ""); return content.length() > SHORTCUT_ICON_TITLE_MAX_LEN ? content.substring(0, SHORTCUT_ICON_TITLE_MAX_LEN) : content; //直接设置为content中的内容并返回，有勾选和未勾选2种 } private void showToast(int resId) { showToast(resId, Toast.LENGTH_SHORT); } private void showToast(int resId, int duration) { Toast.makeText(this, resId, duration).show(); }} 9、NoteEditText.java
package net.micode.notes.ui;import android.content.Context;import android.graphics.Rect;import android.text.Layout;import android.text.Selection;import android.text.Spanned;import android.text.TextUtils;import android.text.style.URLSpan;import android.util.AttributeSet;import android.util.Log;import android.view.ContextMenu;import android.view.KeyEvent;import android.view.MenuItem;import android.view.MenuItem.OnMenuItemClickListener;import android.view.MotionEvent;import android.widget.EditText;import net.micode.notes.R;import java.util.HashMap;import java.util.Map;//继承edittext，设置便签设置文本框public class NoteEditText extends EditText { private static final String TAG = "NoteEditText"; private int mIndex; private int mSelectionStartBeforeDelete; private static final String SCHEME_TEL = "tel:" ; private static final String SCHEME_HTTP = "http:" ; private static final String SCHEME_EMAIL = "mailto:" ; ///建立一个字符和整数的hash表，用于链接电话，网站，还有邮箱 private static final Map sSchemaActionResMap = new HashMap(); static { sSchemaActionResMap.put(SCHEME_TEL, R.string.note_link_tel); sSchemaActionResMap.put(SCHEME_HTTP, R.string.note_link_web); sSchemaActionResMap.put(SCHEME_EMAIL, R.string.note_link_email); } //在NoteEditActivity中删除或添加文本的操作，可以看做是一个文本是否被变的标记，英文注释已说明的很清楚 public interface OnTextViewChangeListener { //处理删除按键时的操作 void onEditTextDelete(int index, String text); //处理进入按键时的操作 void onEditTextEnter(int index, String text); void onTextChange(int index, boolean hasText); } private OnTextViewChangeListener mOnTextViewChangeListener; //根据context设置文本 public NoteEditText(Context context) { super(context, null);//用super引用父类变量 mIndex = 0; } //设置当前光标 public void setIndex(int index) { mIndex = index; } //初始化文本修改标记 public void setOnTextViewChangeListener(OnTextViewChangeListener listener) { mOnTextViewChangeListener = listener; } //AttributeSet 百度了一下是自定义空控件属性，用于维护便签动态变化的属性 //初始化便签 public NoteEditText(Context context, AttributeSet attrs) { super(context, attrs, android.R.attr.editTextStyle); } // 根据defstyle自动初始化 public NoteEditText(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); // TODO Auto-generated construct or stub } @Override //view里的函数，处理手机屏幕的所有事件 public boolean onTouchEvent(MotionEvent event) { switch (event.getAction()) { //重写了需要处理屏幕被按下的事件 case MotionEvent.ACTION_DOWN: //跟新当前坐标值 int x = (int) event.getX(); int y = (int) event.getY(); x -= getTotalPaddingLeft(); y -= getTotalPaddingTop(); x += getScrollX(); y += getScrollY(); //用布局控件layout根据x,y的新值设置新的位置 Layout layout = getLayout(); int line = layout.getLineForVertical(y); int off = layout.getOffsetForHorizontal(line, x); //更新光标新的位置 Selection.setSelection(getText(), off); break; } return super.onTouchEvent(event); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { switch (keyCode) { //根据按键的 Unicode 编码值来处理 case KeyEvent.KEYCODE_ENTER: //“进入”按键 if (mOnTextViewChangeListener != null) { return false; } break; case KeyEvent.KEYCODE_DEL: //“删除”按键 mSelectionStartBeforeDelete = getSelectionStart(); break; default: break; } //继续执行父类的其他点击事件 return super.onKeyDown(keyCode, event); } @Override public boolean onKeyUp(int keyCode, KeyEvent event) { switch(keyCode) { //根据按键的 Unicode 编码值来处理，有删除和进入2种操作 case KeyEvent.KEYCODE_DEL: if (mOnTextViewChangeListener != null) { //若是被修改过 if (0 == mSelectionStartBeforeDelete && mIndex != 0) { //若之前有被修改并且文档不为空 mOnTextViewChangeListener.onEditTextDelete(mIndex, getText().toString()); //利用上文OnTextViewChangeListener对KEYCODE_DEL按键情况的删除函数进行删除 return true; } } else { Log.d(TAG, "OnTextViewChangeListener was not seted"); //其他情况报错，文档的改动监听器并没有建立 } break; case KeyEvent.KEYCODE_ENTER: //同上也是分为监听器是否建立2种情况 if (mOnTextViewChangeListener != null) { int selectionStart = getSelectionStart(); //获取当前位置 String text = getText().subSequence(selectionStart, length()).toString(); //获取当前文本 setText(getText().subSequence(0, selectionStart)); //根据获取的文本设置当前文本 mOnTextViewChangeListener.onEditTextEnter(mIndex + 1, text); //当{@link KeyEvent#KEYCODE_ENTER}添加新文本 } else { Log.d(TAG, "OnTextViewChangeListener was not seted"); //其他情况报错，文档的改动监听器并没有建立 } break; default: break; } //继续执行父类的其他按键弹起的事件 return super.onKeyUp(keyCode, event); } @Override protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) { if (mOnTextViewChangeListener != null) { //若监听器已经建立 if (!focused && TextUtils.isEmpty(getText())) { //获取到焦点并且文本不为空 mOnTextViewChangeListener.onTextChange(mIndex, false); //mOnTextViewChangeListener子函数，置false隐藏事件选项 } else { mOnTextViewChangeListener.onTextChange(mIndex, true); //mOnTextViewChangeListener子函数，置true显示事件选项 } } //继续执行父类的其他焦点变化的事件 super.onFocusChanged(focused, direction, previouslyFocusedRect); } @Override protected void onCreateContextMenu(ContextMenu menu) { if (getText() instanceof Spanned) { //有文本存在 int selStart = getSelectionStart(); int selEnd = getSelectionEnd(); //获取文本开始和结尾位置 int min = Math.min(selStart, selEnd); int max = Math.max(selStart, selEnd); //获取开始到结尾的最大值和最小值 final URLSpan[] urls = ((Spanned) getText()).getSpans(min, max, URLSpan.class); //设置url的信息的范围值 if (urls.length == 1) { int defaultResId = 0; for(String schema: sSchemaActionResMap.keySet()) { //获取计划表中所有的key值 if(urls[0].getURL().indexOf(schema) >= 0) { //若url可以添加则在添加后将defaultResId置为key所映射的值 defaultResId = sSchemaActionResMap.get(schema); break; } } if (defaultResId == 0) { //defaultResId == 0则说明url并没有添加任何东西，所以置为连接其他SchemaActionResMap的值 defaultResId = R.string.note_link_other; } //建立菜单 menu.add(0, 0, 0, defaultResId).setOnMenuItemClickListener( new OnMenuItemClickListener() { //新建按键监听器public boolean onMenuItemClick(MenuItem item) { // goto a new intent urls[0].onClick(NoteEditText.this); //根据相应的文本设置菜单的按键 return true;} }); } } //继续执行父类的其他菜单创建的事件 super.onCreateContextMenu(menu); }} 10、NoteItemData.java
package net.micode.notes.ui;import android.content.Context;import android.database.Cursor;import android.text.TextUtils;import net.micode.notes.data.Contact;import net.micode.notes.data.Notes;import net.micode.notes.data.Notes.NoteColumns;import net.micode.notes.tool.DataUtils;public class NoteItemData { static final String [] PROJECTION = new String [] { NoteColumns.ID, NoteColumns.ALERTED_DATE, NoteColumns.BG_COLOR_ID, NoteColumns.CREATED_DATE, NoteColumns.HAS_ATTACHMENT, NoteColumns.MODIFIED_DATE, NoteColumns.NOTES_COUNT, NoteColumns.PARENT_ID, NoteColumns.SNIPPET, NoteColumns.TYPE, NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE, }; //常量标记和数据就不一一标记了，意义翻译基本就知道 private static final int ID_COLUMN = 0; private static final int ALERTED_DATE_COLUMN = 1; private static final int BG_COLOR_ID_COLUMN = 2; private static final int CREATED_DATE_COLUMN = 3; private static final int HAS_ATTACHMENT_COLUMN = 4; private static final int MODIFIED_DATE_COLUMN = 5; private static final int NOTES_COUNT_COLUMN = 6; private static final int PARENT_ID_COLUMN = 7; private static final int SNIPPET_COLUMN = 8; private static final int TYPE_COLUMN = 9; private static final int WIDGET_ID_COLUMN = 10; private static final int WIDGET_TYPE_COLUMN = 11; private long mId; private long mAlertDate; private int mBgColorId; private long mCreatedDate; private boolean mHasAttachment; private long mModifiedDate; private int mNotesCount; private long mParentId; private String mSnippet; private int mType; private int mWidgetId; private int mWidgetType; private String mName; private String mPhoneNumber; private boolean mIsLastItem; private boolean mIsFirstItem; private boolean mIsOnlyOneItem; private boolean mIsOneNoteFollowingFolder; private boolean mIsMultiNotesFollowingFolder; //初始化NoteItemData，主要利用光标cursor获取的东西 public NoteItemData(Context context, Cursor cursor) { //getxxx为转换格式 mId = cursor.getLong(ID_COLUMN); mAlertDate = cursor.getLong(ALERTED_DATE_COLUMN); mBgColorId = cursor.getInt(BG_COLOR_ID_COLUMN); mCreatedDate = cursor.getLong(CREATED_DATE_COLUMN); mHasAttachment = (cursor.getInt(HAS_ATTACHMENT_COLUMN) > 0) ? true : false; mModifiedDate = cursor.getLong(MODIFIED_DATE_COLUMN); mNotesCount = cursor.getInt(NOTES_COUNT_COLUMN); mParentId = cursor.getLong(PARENT_ID_COLUMN); mSnippet = cursor.getString(SNIPPET_COLUMN); mSnippet = mSnippet.replace(NoteEditActivity.TAG_CHECKED, "").replace( NoteEditActivity.TAG_UNCHECKED, ""); mType = cursor.getInt(TYPE_COLUMN); mWidgetId = cursor.getInt(WIDGET_ID_COLUMN); mWidgetType = cursor.getInt(WIDGET_TYPE_COLUMN); //初始化电话号码的信息 mPhoneNumber = ""; if (mParentId == Notes.ID_CALL_RECORD_FOLDER) { mPhoneNumber = DataUtils.getCallNumberByNoteId(context.getContentResolver(), mId); if (!TextUtils.isEmpty(mPhoneNumber)) {//mphonenumber里有符合字符串，则用contart功能连接 mName = Contact.getContact(context, mPhoneNumber); if (mName == null) { mName = mPhoneNumber; } } } if (mName == null) { mName = ""; } checkPostion(cursor); } ///根据鼠标的位置设置标记，和位置 private void checkPostion(Cursor cursor) { //初始化几个标记，cursor具体功能笔记中已提到，不一一叙述 mIsLastItem = cursor.isLast() ? true : false; mIsFirstItem = cursor.isFirst() ? true : false; mIsOnlyOneItem = (cursor.getCount() == 1); //初始化“多重子文件”“单一子文件”2个标记 mIsMultiNotesFollowingFolder = false; mIsOneNoteFollowingFolder = false; //主要是设置上诉2标记 if (mType == Notes.TYPE_NOTE && !mIsFirstItem) {//若是note格式并且不是第一个元素 int position = cursor.getPosition(); if (cursor.moveToPrevious()) {//获取光标位置后看上一行 if (cursor.getInt(TYPE_COLUMN) == Notes.TYPE_FOLDER || cursor.getInt(TYPE_COLUMN) == Notes.TYPE_SYSTEM) {//若光标满足系统或note格式 if (cursor.getCount() > (position + 1)) { mIsMultiNotesFollowingFolder = true;//若是数据行数大于但前位置+1则设置成正确 } else { mIsOneNoteFollowingFolder = true;//否则单一文件夹标记为true } } if (!cursor.moveToNext()) {//若不能再往下走则报错 throw new IllegalStateException("cursor move to previous but can't move back"); } } } }///以下都是获取标记没什么好说的，不过倒数第二个需要说明下，很具体看下面 public boolean isOneFollowingFolder() { return mIsOneNoteFollowingFolder; } public boolean isMultiFollowingFolder() { return mIsMultiNotesFollowingFolder; } public boolean isLast() { return mIsLastItem; } public String getCallName() { return mName; } public boolean isFirst() { return mIsFirstItem; } public boolean isSingle() { return mIsOnlyOneItem; } public long getId() { return mId; } public long getAlertDate() { return mAlertDate; } public long getCreatedDate() { return mCreatedDate; } public boolean hasAttachment() { return mHasAttachment; } public long getModifiedDate() { return mModifiedDate; } public int getBgColorId() { return mBgColorId; } public long getParentId() { return mParentId; } public int getNotesCount() { return mNotesCount; } public long getFolderId () { return mParentId; } public int getType() { return mType; } public int getWidgetType() { return mWidgetType; } public int getWidgetId() { return mWidgetId; } public String getSnippet() { return mSnippet; } public boolean hasAlert() { return (mAlertDate > 0); } //若数据父id为保存至文件夹模式的id且满足电话号码单元不为空，则isCallRecord为true public boolean isCallRecord() { return (mParentId == Notes.ID_CALL_RECORD_FOLDER && !TextUtils.isEmpty(mPhoneNumber)); } public static int getNoteType(Cursor cursor) { return cursor.getInt(TYPE_COLUMN); }}11、NotesListActivity.java
package net.micode.notes.ui;import android.app.Activity;import android.app.AlertDialog;import android.app.Dialog;import android.appwidget.AppWidgetManager;import android.content.AsyncQueryHandler;import android.content.ContentResolver;import android.content.ContentValues;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.content.SharedPreferences;import android.database.Cursor;import android.os.AsyncTask;import android.os.Bundle;import android.preference.PreferenceManager;import android.text.Editable;import android.text.TextUtils;import android.text.TextWatcher;import android.util.Log;import android.view.ActionMode;import android.view.ContextMenu;import android.view.ContextMenu.ContextMenuInfo;import android.view.Display;import android.view.HapticFeedbackConstants;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.MenuItem.OnMenuItemClickListener;import android.view.MotionEvent;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnCreateContextMenuListener;import android.view.View.OnTouchListener;import android.view.inputmethod.InputMethodManager;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.AdapterView.OnItemLongClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.ListView;import android.widget.PopupMenu;import android.widget.TextView;import android.widget.Toast;import net.micode.notes.R;import net.micode.notes.data.Notes;import net.micode.notes.data.Notes.NoteColumns;import net.micode.notes.gtask.remote.GTaskSyncService;import net.micode.notes.model.WorkingNote;import net.micode.notes.tool.BackupUtils;import net.micode.notes.tool.DataUtils;import net.micode.notes.tool.ResourceParser;import net.micode.notes.ui.NotesListAdapter.AppWidgetAttribute;import net.micode.notes.widget.NoteWidgetProvider_2x;import net.micode.notes.widget.NoteWidgetProvider_4x;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.util.HashSet;//主界面，一进入就是这个界面public class NotesListActivity extends Activity implements OnClickListener, OnItemLongClickListener { //没有用特定的标签加注释。。。感觉没有什么用 private static final int FOLDER_NOTE_LIST_QUERY_TOKEN = 0; private static final int FOLDER_LIST_QUERY_TOKEN = 1; private static final int MENU_FOLDER_DELETE = 0; private static final int MENU_FOLDER_VIEW = 1; private static final int MENU_FOLDER_CHANGE_NAME = 2; private static final String PREFERENCE_ADD_INTRODUCTION = "net.micode.notes.introduction"; //单行超过80个字符 private enum ListEditState { NOTE_LIST, SUB_FOLDER, CALL_RECORD_FOLDER }; private ListEditState mState; private BackgroundQueryHandler mBackgroundQueryHandler; private NotesListAdapter mNotesListAdapter; private ListView mNotesListView; private Button mAddNewNote; private boolean mDispatch; private int mOriginY; private int mDispatchY; private TextView mTitleBar; private long mCurrentFolderId; private ContentResolver mContentResolver; private ModeCallback mModeCallBack; private static final String TAG = "NotesListActivity"; public static final int NOTES_LISTVIEW_SCROLL_RATE = 30; private NoteItemData mFocusNoteDataItem; private static final String NORMAL_SELECTION = NoteColumns.PARENT_ID + "=?"; private static final String ROOT_FOLDER_SELECTION = "(" + NoteColumns.TYPE + "<>" + Notes.TYPE_SYSTEM + " AND " + NoteColumns.PARENT_ID + "=?)" + " OR (" + NoteColumns.ID + "=" + Notes.ID_CALL_RECORD_FOLDER + " AND " + NoteColumns.NOTES_COUNT + ">0)"; private final static int REQUEST_CODE_OPEN_NODE = 102; private final static int REQUEST_CODE_NEW_NODE = 103; @Override // 创建类 protected void onCreate(final Bundle savedInstanceState) { //需要是final类型 根据程序上下文环境，Java关键字final有“这是无法改变的”或者“终态的”含义，它可以修饰非抽象类、非抽象类成员方法和变量。你可能出于两种理解而需要阻止改变：设计或效率。 // final类不能被继承，没有子类，final类中的方法默认是final的。 //final方法不能被子类的方法覆盖，但可以被继承。 //final成员变量表示常量，只能被赋值一次，赋值后值不再改变。 //final不能用于修饰构造方法。 super.onCreate(savedInstanceState); // 调用父类的onCreate函数 setContentView(R.layout.note_list); initResources(); setAppInfoFromRawRes(); } @Override // 返回一些子模块完成的数据交给主Activity处理 protected void onActivityResult(int requestCode, int resultCode, Intent data) { // 结果值 和 要求值 符合要求 if (resultCode == RESULT_OK && (requestCode == REQUEST_CODE_OPEN_NODE || requestCode == REQUEST_CODE_NEW_NODE)) { mNotesListAdapter.changeCursor(null); } else { super.onActivityResult(requestCode, resultCode, data); // 调用 Activity 的onActivityResult（） } } private void setAppInfoFromRawRes() { // Android平台给我们提供了一个SharedPreferences类，它是一个轻量级的存储类，特别适合用于保存软件配置参数。 SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this); if (!sp.getBoolean(PREFERENCE_ADD_INTRODUCTION, false)) { StringBuilder sb = new StringBuilder(); InputStream in = null; try { // 把资源文件放到应用程序的/raw/raw下，那么就可以在应用中使用getResources获取资源后, // 以openRawResource方法（不带后缀的资源文件名）打开这个文件。 in = getResources().openRawResource(R.raw.introduction); if (in != null) { InputStreamReader isr = new InputStreamReader(in); BufferedReader br = new BufferedReader(isr); char [] buf = new char[1024]; // 自行定义的数值，使用者不知道有什么意义 int len = 0; while ((len = br.read(buf)) > 0) { sb.append(buf, 0, len); } } else { Log.e(TAG, "Read introduction file error"); return; } } catch (IOException e) { e.printStackTrace(); return; } finally { if (in != null) { try { in.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } // 创建空的WorkingNote WorkingNote note = WorkingNote.createEmptyNote(this, Notes.ID_ROOT_FOLDER, AppWidgetManager.INVALID_APPWIDGET_ID, Notes.TYPE_WIDGET_INVALIDE, ResourceParser.RED); note.setWorkingText(sb.toString()); if (note.saveNote()) { // 更新保存note的信息 sp.edit().putBoolean(PREFERENCE_ADD_INTRODUCTION, true).commit(); } else { Log.e(TAG, "Save introduction note error"); return; } } } @Override protected void onStart() { super.onStart(); startAsyncNotesListQuery(); } // 初始化资源 private void initResources() { mContentResolver = this.getContentResolver(); // 获取应用程序的数据，得到类似数据表的东西 mBackgroundQueryHandler = new BackgroundQueryHandler(this.getContentResolver()); mCurrentFolderId = Notes.ID_ROOT_FOLDER; // findViewById 是安卓编程的定位函数，主要是引用.R文件里的引用名 mNotesListView = (ListView) findViewById(R.id.notes_list); // 绑定XML中的ListView，作为Item的容器 mNotesListView.addFooterView(LayoutInflater.from(this).inflate(R.layout.note_list_footer, null), null, false); mNotesListView.setOnItemClickListener(new OnListItemClickListener()); mNotesListView.setOnItemLongClickListener(this); mNotesListAdapter = new NotesListAdapter(this); mNotesListView.setAdapter(mNotesListAdapter); mAddNewNote = (Button) findViewById(R.id.btn_new_note);// 在activity中要获取该按钮 mAddNewNote.setOnClickListener(this); mAddNewNote.setOnTouchListener(new NewNoteOnTouchListener()); mDispatch = false; mDispatchY = 0; mOriginY = 0; mTitleBar = (TextView) findViewById(R.id.tv_title_bar); mState = ListEditState.NOTE_LIST; mModeCallBack = new ModeCallback(); } // 继承自ListView.MultiChoiceModeListener 和 OnMenuItemClickListener private class ModeCallback implements ListView.MultiChoiceModeListener, OnMenuItemClickListener { private DropdownMenu mDropDownMenu; private ActionMode mActionMode; private MenuItem mMoveMenu; public boolean onCreateActionMode(ActionMode mode, Menu menu) { getMenuInflater().inflate(R.menu.note_list_options, menu); menu.findItem(R.id.delete).setOnMenuItemClickListener(this); mMoveMenu = menu.findItem(R.id.move); if (mFocusNoteDataItem.getParentId() == Notes.ID_CALL_RECORD_FOLDER || DataUtils.getUserFolderCount(mContentResolver) == 0) { mMoveMenu.setVisible(false); } else { mMoveMenu.setVisible(true); mMoveMenu.setOnMenuItemClickListener(this); } mActionMode = mode; mNotesListAdapter.setChoiceMode(true); mNotesListView.setLongClickable(false); mAddNewNote.setVisibility(View.GONE); View customView = LayoutInflater.from(NotesListActivity.this).inflate( R.layout.note_list_dropdown_menu, null); mode.setCustomView(customView); mDropDownMenu = new DropdownMenu(NotesListActivity.this, (Button) customView.findViewById(R.id.selection_menu), R.menu.note_list_dropdown); mDropDownMenu.setOnDropdownMenuItemClickListener(new PopupMenu.OnMenuItemClickListener(){ public boolean onMenuItemClick(final MenuItem item) { mNotesListAdapter.selectAll(!mNotesListAdapter.isAllSelected()); updateMenu(); return true; } }); return true; } // 更新菜单 private void updateMenu() { int selectedCount = mNotesListAdapter.getSelectedCount(); // Update dropdown menu String format = getResources().getString(R.string.menu_select_title, selectedCount); mDropDownMenu.setTitle(format); // 更改 MenuItem item = mDropDownMenu.findItem(R.id.action_select_all); if (item != null) { if (mNotesListAdapter.isAllSelected()) { item.setChecked(true); item.setTitle(R.string.menu_deselect_all); } else { item.setChecked(false); item.setTitle(R.string.menu_select_all); } } } public boolean onPrepareActionMode(ActionMode mode, Menu menu) { // TODO Auto-generated method stub return false; } public boolean onActionItemClicked(ActionMode mode, MenuItem item) { // TODO Auto-generated method stub return false; } public void onDestroyActionMode(ActionMode mode) { mNotesListAdapter.setChoiceMode(false); mNotesListView.setLongClickable(true); mAddNewNote.setVisibility(View.VISIBLE); } public void finishActionMode() { mActionMode.finish(); } public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) { mNotesListAdapter.setCheckedItem(position, checked); updateMenu(); } public boolean onMenuItemClick(MenuItem item) { if (mNotesListAdapter.getSelectedCount() == 0) { Toast.makeText(NotesListActivity.this, getString(R.string.menu_select_none), Toast.LENGTH_SHORT).show(); return true; } switch (item.getItemId()) { case R.id.delete: AlertDialog.Builder builder = new AlertDialog.Builder(NotesListActivity.this); builder.setTitle(getString(R.string.alert_title_delete)); builder.setIcon(android.R.drawable.ic_dialog_alert); builder.setMessage(getString(R.string.alert_message_delete_notes, mNotesListAdapter.getSelectedCount())); builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { batchDelete(); } }); builder.setNegativeButton(android.R.string.cancel, null); builder.show(); break; case R.id.move: startQueryDestinationFolders(); break; default: return false; } return true; } } private class NewNoteOnTouchListener implements OnTouchListener { public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: { Display display = getWindowManager().getDefaultDisplay(); int screenHeight = display.getHeight(); int newNoteViewHeight = mAddNewNote.getHeight(); int start = screenHeight - newNoteViewHeight; int eventY = start + (int) event.getY(); if (mState == ListEditState.SUB_FOLDER) { eventY -= mTitleBar.getHeight(); start -= mTitleBar.getHeight(); } if (event.getY() < (event.getX() * (-0.12) + 94)) { View view = mNotesListView.getChildAt(mNotesListView.getChildCount() - 1 - mNotesListView.getFooterViewsCount()); if (view != null && view.getBottom() > start && (view.getTop() < (start + 94))) {mOriginY = (int) event.getY();mDispatchY = eventY;event.setLocation(event.getX(), mDispatchY);mDispatch = true;return mNotesListView.dispatchTouchEvent(event); } } break; } case MotionEvent.ACTION_MOVE: { if (mDispatch) { mDispatchY += (int) event.getY() - mOriginY; event.setLocation(event.getX(), mDispatchY); return mNotesListView.dispatchTouchEvent(event); } break; } default: { if (mDispatch) { event.setLocation(event.getX(), mDispatchY); mDispatch = false; return mNotesListView.dispatchTouchEvent(event); } break; } } return false; } }; private void startAsyncNotesListQuery() { String selection = (mCurrentFolderId == Notes.ID_ROOT_FOLDER) ? ROOT_FOLDER_SELECTION : NORMAL_SELECTION; mBackgroundQueryHandler.startQuery(FOLDER_NOTE_LIST_QUERY_TOKEN, null, Notes.CONTENT_NOTE_URI, NoteItemData.PROJECTION, selection, new String[] { String.valueOf(mCurrentFolderId) }, NoteColumns.TYPE + " DESC," + NoteColumns.MODIFIED_DATE + " DESC"); } private final class BackgroundQueryHandler extends AsyncQueryHandler { public BackgroundQueryHandler(ContentResolver contentResolver) { super(contentResolver); } @Override protected void onQueryComplete(int token, Object cookie, Cursor cursor) { switch (token) { case FOLDER_NOTE_LIST_QUERY_TOKEN: mNotesListAdapter.changeCursor(cursor); break; case FOLDER_LIST_QUERY_TOKEN: if (cursor != null && cursor.getCount() > 0) { showFolderListMenu(cursor); } else { Log.e(TAG, "Query folder failed"); } break; default: return; } } } private void showFolderListMenu(Cursor cursor) { AlertDialog.Builder builder = new AlertDialog.Builder(NotesListActivity.this); builder.setTitle(R.string.menu_title_select_folder); final FoldersListAdapter adapter = new FoldersListAdapter(this, cursor); builder.setAdapter(adapter, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { DataUtils.batchMoveToFolder(mContentResolver, mNotesListAdapter.getSelectedItemIds(), adapter.getItemId(which)); Toast.makeText( NotesListActivity.this, getString(R.string.format_move_notes_to_folder, mNotesListAdapter.getSelectedCount(), adapter.getFolderName(NotesListActivity.this, which)), Toast.LENGTH_SHORT).show(); mModeCallBack.finishActionMode(); } }); builder.show(); } private void createNewNote() { Intent intent = new Intent(this, NoteEditActivity.class); intent.setAction(Intent.ACTION_INSERT_OR_EDIT); intent.putExtra(Notes.INTENT_EXTRA_FOLDER_ID, mCurrentFolderId); this.startActivityForResult(intent, REQUEST_CODE_NEW_NODE); } private void batchDelete() { new AsyncTask>() { protected HashSet doInBackground(Void... unused) { HashSet widgets = mNotesListAdapter.getSelectedWidget(); if (!isSyncMode()) { // if not synced, delete notes directly if (DataUtils.batchDeleteNotes(mContentResolver, mNotesListAdapter.getSelectedItemIds())) { } else { Log.e(TAG, "Delete notes error, should not happens"); } } else { // in sync mode, we'll move the deleted note into the trash // folder if (!DataUtils.batchMoveToFolder(mContentResolver, mNotesListAdapter.getSelectedItemIds(), Notes.ID_TRASH_FOLER)) { Log.e(TAG, "Move notes to trash folder error, should not happens"); } } return widgets; } @Override protected void onPostExecute(HashSet widgets) { if (widgets != null) { for (AppWidgetAttribute widget : widgets) { if (widget.widgetId != AppWidgetManager.INVALID_APPWIDGET_ID && widget.widgetType != Notes.TYPE_WIDGET_INVALIDE) {updateWidget(widget.widgetId, widget.widgetType); } } } mModeCallBack.finishActionMode(); } }.execute(); } private void deleteFolder(long folderId) { if (folderId == Notes.ID_ROOT_FOLDER) { Log.e(TAG, "Wrong folder id, should not happen " + folderId); return; } HashSet ids = new HashSet(); ids.add(folderId); HashSet widgets = DataUtils.getFolderNoteWidget(mContentResolver, folderId); if (!isSyncMode()) { // if not synced, delete folder directly DataUtils.batchDeleteNotes(mContentResolver, ids); } else { // in sync mode, we'll move the deleted folder into the trash folder DataUtils.batchMoveToFolder(mContentResolver, ids, Notes.ID_TRASH_FOLER); } if (widgets != null) { for (AppWidgetAttribute widget : widgets) { if (widget.widgetId != AppWidgetManager.INVALID_APPWIDGET_ID && widget.widgetType != Notes.TYPE_WIDGET_INVALIDE) { updateWidget(widget.widgetId, widget.widgetType); } } } } private void openNode(NoteItemData data) { Intent intent = new Intent(this, NoteEditActivity.class); intent.setAction(Intent.ACTION_VIEW); intent.putExtra(Intent.EXTRA_UID, data.getId()); this.startActivityForResult(intent, REQUEST_CODE_OPEN_NODE); } private void openFolder(NoteItemData data) { mCurrentFolderId = data.getId(); startAsyncNotesListQuery(); if (data.getId() == Notes.ID_CALL_RECORD_FOLDER) { mState = ListEditState.CALL_RECORD_FOLDER; mAddNewNote.setVisibility(View.GONE); } else { mState = ListEditState.SUB_FOLDER; } if (data.getId() == Notes.ID_CALL_RECORD_FOLDER) { mTitleBar.setText(R.string.call_record_folder_name); } else { mTitleBar.setText(data.getSnippet()); } mTitleBar.setVisibility(View.VISIBLE); } public void onClick(View v) { switch (v.getId()) { case R.id.btn_new_note: createNewNote(); break; default: break; } } private void showSoftInput() { InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); if (inputMethodManager != null) { inputMethodManager.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0); } } private void hideSoftInput(View view) { InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); inputMethodManager.hideSoftInputFromWindow(view.getWindowToken(), 0); } private void showCreateOrModifyFolderDialog(final boolean create) { final AlertDialog.Builder builder = new AlertDialog.Builder(this); View view = LayoutInflater.from(this).inflate(R.layout.dialog_edit_text, null); final EditText etName = (EditText) view.findViewById(R.id.et_foler_name); showSoftInput(); if (!create) { if (mFocusNoteDataItem != null) { etName.setText(mFocusNoteDataItem.getSnippet()); builder.setTitle(getString(R.string.menu_folder_change_name)); } else { Log.e(TAG, "The long click data item is null"); return; } } else { etName.setText(""); builder.setTitle(this.getString(R.string.menu_create_folder)); } builder.setPositiveButton(android.R.string.ok, null); builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { hideSoftInput(etName); } }); final Dialog dialog = builder.setView(view).show(); final Button positive = (Button)dialog.findViewById(android.R.id.button1); positive.setOnClickListener(new OnClickListener() { public void onClick(View v) { hideSoftInput(etName); String name = etName.getText().toString(); if (DataUtils.checkVisibleFolderName(mContentResolver, name)) { Toast.makeText(NotesListActivity.this, getString(R.string.folder_exist, name),Toast.LENGTH_LONG).show(); etName.setSelection(0, etName.length()); return; } if (!create) { if (!TextUtils.isEmpty(name)) { ContentValues values = new ContentValues(); values.put(NoteColumns.SNIPPET, name); values.put(NoteColumns.TYPE, Notes.TYPE_FOLDER); values.put(NoteColumns.LOCAL_MODIFIED, 1); mContentResolver.update(Notes.CONTENT_NOTE_URI, values, NoteColumns.ID + "=?", new String[] {String.valueOf(mFocusNoteDataItem.getId()) }); } } else if (!TextUtils.isEmpty(name)) { ContentValues values = new ContentValues(); values.put(NoteColumns.SNIPPET, name); values.put(NoteColumns.TYPE, Notes.TYPE_FOLDER); mContentResolver.insert(Notes.CONTENT_NOTE_URI, values); } dialog.dismiss(); } }); if (TextUtils.isEmpty(etName.getText())) { positive.setEnabled(false); } etName.addTextChangedListener(new TextWatcher() { public void beforeTextChanged(CharSequence s, int start, int count, int after) { // TODO Auto-generated method stub } public void onTextChanged(CharSequence s, int start, int before, int count) { if (TextUtils.isEmpty(etName.getText())) { positive.setEnabled(false); } else { positive.setEnabled(true); } } public void afterTextChanged(Editable s) { // TODO Auto-generated method stub } }); } @Override public void onBackPressed() { switch (mState) { case SUB_FOLDER: mCurrentFolderId = Notes.ID_ROOT_FOLDER; mState = ListEditState.NOTE_LIST; startAsyncNotesListQuery(); mTitleBar.setVisibility(View.GONE); break; case CALL_RECORD_FOLDER: mCurrentFolderId = Notes.ID_ROOT_FOLDER; mState = ListEditState.NOTE_LIST; mAddNewNote.setVisibility(View.VISIBLE); mTitleBar.setVisibility(View.GONE); startAsyncNotesListQuery(); break; case NOTE_LIST: super.onBackPressed(); break; default: break; } } private void updateWidget(int appWidgetId, int appWidgetType) { Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE); if (appWidgetType == Notes.TYPE_WIDGET_2X) { intent.setClass(this, NoteWidgetProvider_2x.class); } else if (appWidgetType == Notes.TYPE_WIDGET_4X) { intent.setClass(this, NoteWidgetProvider_4x.class); } else { Log.e(TAG, "Unspported widget type"); return; } intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[] { appWidgetId }); sendBroadcast(intent); setResult(RESULT_OK, intent); } private final OnCreateContextMenuListener mFolderOnCreateContextMenuListener = new OnCreateContextMenuListener() { public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { if (mFocusNoteDataItem != null) { menu.setHeaderTitle(mFocusNoteDataItem.getSnippet()); menu.add(0, MENU_FOLDER_VIEW, 0, R.string.menu_folder_view); menu.add(0, MENU_FOLDER_DELETE, 0, R.string.menu_folder_delete); menu.add(0, MENU_FOLDER_CHANGE_NAME, 0, R.string.menu_folder_change_name); } } }; @Override public void onContextMenuClosed(Menu menu) { if (mNotesListView != null) { mNotesListView.setOnCreateContextMenuListener(null); } super.onContextMenuClosed(menu); } @Override public boolean onContextItemSelected(MenuItem item) { if (mFocusNoteDataItem == null) { Log.e(TAG, "The long click data item is null"); return false; } switch (item.getItemId()) { case MENU_FOLDER_VIEW: openFolder(mFocusNoteDataItem);//打开对应文件 break; case MENU_FOLDER_DELETE: AlertDialog.Builder builder = new AlertDialog.Builder(this);//设置确认是否删除的对话框 builder.setTitle(getString(R.string.alert_title_delete)); builder.setIcon(android.R.drawable.ic_dialog_alert); builder.setMessage(getString(R.string.alert_message_delete_folder)); builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int which) { deleteFolder(mFocusNoteDataItem.getId());} }); builder.setNegativeButton(android.R.string.cancel, null); builder.show();//显示对话框 break; case MENU_FOLDER_CHANGE_NAME: showCreateOrModifyFolderDialog(false); break; default: break; } return true; } @Override public boolean onPrepareOptionsMenu(Menu menu) { menu.clear(); if (mState == ListEditState.NOTE_LIST) { getMenuInflater().inflate(R.menu.note_list, menu); // set sync or sync_cancel menu.findItem(R.id.menu_sync).setTitle( GTaskSyncService.isSyncing() ? R.string.menu_sync_cancel : R.string.menu_sync); } else if (mState == ListEditState.SUB_FOLDER) { getMenuInflater().inflate(R.menu.sub_folder, menu); } else if (mState == ListEditState.CALL_RECORD_FOLDER) { getMenuInflater().inflate(R.menu.call_record_folder, menu); } else { Log.e(TAG, "Wrong state:" + mState); } return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.menu_new_folder: { showCreateOrModifyFolderDialog(true); break; } case R.id.menu_export_text: { exportNoteToText(); break; } case R.id.menu_sync: { if (isSyncMode()) { if (TextUtils.equals(item.getTitle(), getString(R.string.menu_sync))) { GTaskSyncService.startSync(this); } else { GTaskSyncService.cancelSync(this); } } else { startPreferenceActivity(); } break; } case R.id.menu_setting: { startPreferenceActivity(); break; } case R.id.menu_new_note: { createNewNote(); break; } case R.id.menu_search: onSearchRequested(); break; default: break; } return true; } @Override public boolean onSearchRequested() { startSearch(null, false, null , false); return true; } private void exportNoteToText() { final BackupUtils backup = BackupUtils.getInstance(NotesListActivity.this); new AsyncTask() { @Override protected Integer doInBackground(Void... unused) { return backup.exportToText(); } @Override protected void onPostExecute(Integer result) { if (result == BackupUtils.STATE_SD_CARD_UNMOUONTED) { AlertDialog.Builder builder = new AlertDialog.Builder(NotesListActivity.this); builder.setTitle(NotesListActivity.this.getString(R.string.failed_sdcard_export)); builder.setMessage(NotesListActivity.this.getString(R.string.error_sdcard_unmounted)); builder.setPositiveButton(android.R.string.ok, null); builder.show(); } else if (result == BackupUtils.STATE_SUCCESS) { AlertDialog.Builder builder = new AlertDialog.Builder(NotesListActivity.this); builder.setTitle(NotesListActivity.this.getString(R.string.success_sdcard_export)); builder.setMessage(NotesListActivity.this.getString(R.string.format_exported_file_location, backup .getExportedTextFileName(), backup.getExportedTextFileDir())); builder.setPositiveButton(android.R.string.ok, null); builder.show(); } else if (result == BackupUtils.STATE_SYSTEM_ERROR) { AlertDialog.Builder builder = new AlertDialog.Builder(NotesListActivity.this); builder.setTitle(NotesListActivity.this.getString(R.string.failed_sdcard_export)); builder.setMessage(NotesListActivity.this.getString(R.string.error_sdcard_export)); builder.setPositiveButton(android.R.string.ok, null); builder.show(); } } }.execute(); } private boolean isSyncMode() { return NotesPreferenceActivity.getSyncAccountName(this).trim().length() > 0; } private void startPreferenceActivity() { Activity from = getParent() != null ? getParent() : this; Intent intent = new Intent(from, NotesPreferenceActivity.class); from.startActivityIfNeeded(intent, -1); } private class OnListItemClickListener implements OnItemClickListener { public void onItemClick(AdapterView parent, View view, int position, long id) { if (view instanceof NotesListItem) { NoteItemData item = ((NotesListItem) view).getItemData(); if (mNotesListAdapter.isInChoiceMode()) { if (item.getType() == Notes.TYPE_NOTE) { position = position - mNotesListView.getHeaderViewsCount(); mModeCallBack.onItemCheckedStateChanged(null, position, id, !mNotesListAdapter.isSelectedItem(position)); } return; } switch (mState) { case NOTE_LIST: if (item.getType() == Notes.TYPE_FOLDER || item.getType() == Notes.TYPE_SYSTEM) {openFolder(item); } else if (item.getType() == Notes.TYPE_NOTE) {openNode(item); } else {Log.e(TAG, "Wrong note type in NOTE_LIST"); } break; case SUB_FOLDER: case CALL_RECORD_FOLDER: if (item.getType() == Notes.TYPE_NOTE) {openNode(item); } else {Log.e(TAG, "Wrong note type in SUB_FOLDER"); } break; default: break; } } } } private void startQueryDestinationFolders() { String selection = NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>? AND " + NoteColumns.ID + "<>?"; selection = (mState == ListEditState.NOTE_LIST) ? selection: "(" + selection + ") OR (" + NoteColumns.ID + "=" + Notes.ID_ROOT_FOLDER + ")"; mBackgroundQueryHandler.startQuery(FOLDER_LIST_QUERY_TOKEN, null, Notes.CONTENT_NOTE_URI, FoldersListAdapter.PROJECTION, selection, new String[] { String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER), String.valueOf(mCurrentFolderId) }, NoteColumns.MODIFIED_DATE + " DESC"); } public boolean onItemLongClick(AdapterView parent, View view, int position, long id) { if (view instanceof NotesListItem) { mFocusNoteDataItem = ((NotesListItem) view).getItemData(); if (mFocusNoteDataItem.getType() == Notes.TYPE_NOTE && !mNotesListAdapter.isInChoiceMode()) { if (mNotesListView.startActionMode(mModeCallBack) != null) { mModeCallBack.onItemCheckedStateChanged(null, position, id, true); mNotesListView.performHapticFeedback(HapticFeedbackConstants.LONG_PRESS); } else { Log.e(TAG, "startActionMode fails"); } } else if (mFocusNoteDataItem.getType() == Notes.TYPE_FOLDER) { mNotesListView.setOnCreateContextMenuListener(mFolderOnCreateContextMenuListener); } } return false; }} 12、NotesListAdapter.java
package net.micode.notes.ui;import android.content.Context;import android.database.Cursor;import android.util.Log;import android.view.View; import android.view.ViewGroup;import android.widget.CursorAdapter;import net.micode.notes.data.Notes;import java.util.Collection;import java.util.HashMap;import java.util.HashSet;import java.util.Iterator;public class NotesListAdapter extends CursorAdapter { private static final String TAG = "NotesListAdapter"; private Context mContext; private HashMap mSelectedIndex; private int mNotesCount; //便签数 private boolean mChoiceMode; //选择模式标记 public static class AppWidgetAttribute { public int widgetId; public int widgetType; }; public NotesListAdapter(Context context) { super(context, null); //父类对象置空 mSelectedIndex = new HashMap(); //新建选项下标的hash表 mContext = context; mNotesCount = 0; } @Override public View newView(Context context, Cursor cursor, ViewGroup parent) { return new NotesListItem(context); } @Override public void bindView(View view, Context context, Cursor cursor) { if (view instanceof NotesListItem) { //若view是NotesListItem的一个实例 NoteItemData itemData = new NoteItemData(context, cursor); ((NotesListItem) view).bind(context, itemData, mChoiceMode, isSelectedItem(cursor.getPosition())); //则新建一个项目选项并且用bind跟将view和鼠标，内容，便签数据捆绑在一起 } } public void setCheckedItem(final int position, final boolean checked) { mSelectedIndex.put(position, checked); //根据定位和是否勾选设置下标 notifyDataSetChanged(); //在修改后刷新activity } public boolean isInChoiceMode() { return mChoiceMode; } public void setChoiceMode(boolean mode) { mSelectedIndex.clear(); mChoiceMode = mode; } public void selectAll(boolean checked) { Cursor cursor = getCursor(); //获取光标位置 for (int i = 0; i < getCount(); i++) { if (cursor.moveToPosition(i)) { if (NoteItemData.getNoteType(cursor) == Notes.TYPE_NOTE) { setCheckedItem(i, checked); } } } //遍历所有光标可用的位置在判断为便签类型之后勾选单项框 } public HashSet getSelectedItemIds() { HashSet itemSet = new HashSet(); //建立hash表 for (Integer position : mSelectedIndex.keySet()) { //遍历所有的关键 if (mSelectedIndex.get(position) == true) { //若光标位置可用 Long id = getItemId(position); if (id == Notes.ID_ROOT_FOLDER) { //原文件不需要添加 Log.d(TAG, "Wrong item id, should not happen"); } else { itemSet.add(id); } //则将id该下标假如选项集合中} } return itemSet; } public HashSet getSelectedWidget() { HashSet itemSet = new HashSet(); for (Integer position : mSelectedIndex.keySet()) { if (mSelectedIndex.get(position) == true) { Cursor c = (Cursor) getItem(position); //以上4句和getSelectedItemIds一样，不再重复 if (c != null) { //光标位置可用的话就建立新的Widget属性并编辑下标和类型，最后添加到选项集中 AppWidgetAttribute widget = new AppWidgetAttribute(); NoteItemData item = new NoteItemData(mContext, c); widget.widgetId = item.getWidgetId(); widget.widgetType = item.getWidgetType(); itemSet.add(widget); } else { Log.e(TAG, "Invalid cursor"); return null; } } } return itemSet; } public int getSelectedCount() { Collection values = mSelectedIndex.values(); //首先获取选项下标的值 if (null == values) { return 0; } Iterator iter = values.iterator(); //初始化叠加器 int count = 0; while (iter.hasNext()) { if (true == iter.next()) { //若value值为真计数+1 count++; } } return count; } public boolean isAllSelected() { int checkedCount = getSelectedCount(); return (checkedCount != 0 && checkedCount == mNotesCount); //获取选项数看是否等于便签的个数 } public boolean isSelectedItem(final int position) { if (null == mSelectedIndex.get(position)) { return false; } return mSelectedIndex.get(position); } @Override protected void onContentChanged() { super.onContentChanged(); //执行基类函数 calcNotesCount(); } @Override public void changeCursor(Cursor cursor) { super.changeCursor(cursor); //执行基类函数 calcNotesCount(); } private void calcNotesCount() { mNotesCount = 0; for (int i = 0; i < getCount(); i++) { //获取总数同时遍历 Cursor c = (Cursor) getItem(i); if (c != null) { if (NoteItemData.getNoteType(c) == Notes.TYPE_NOTE) { mNotesCount++; //若该位置不为空并且文本类型为便签就+1 } } else { Log.e(TAG, "Invalid cursor"); return; } //否则报错 } } } 13、NotesListItem.java
package net.micode.notes.ui;import android.content.Context;import android.text.format.DateUtils;import android.view.View;import android.widget.CheckBox;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.TextView;import net.micode.notes.R;import net.micode.notes.data.Notes;import net.micode.notes.tool.DataUtils;import net.micode.notes.tool.ResourceParser.NoteItemBgResources;//创建便签列表项目选项public class NotesListItem extends LinearLayout { private ImageView mAlert;//闹钟图片 private TextView mTitle; // private TextView mTime; //时间 private TextView mCallName; // private NoteItemData mItemData; //标签数据 private CheckBox mCheckBox; //打钩框 public NotesListItem(Context context) { super(context); //super()它的主要作用是调整调用父类构造函数的顺序 inflate(context, R.layout.note_item, this);//Inflate可用于将一个xml中定义的布局控件找出来,这里的xml是r。layout //findViewById用于从contentView中查找指定ID的View，转换出来的形式根据需要而定; mAlert = (ImageView) findViewById(R.id.iv_alert_icon); mTitle = (TextView) findViewById(R.id.tv_title); mTime = (TextView) findViewById(R.id.tv_time); mCallName = (TextView) findViewById(R.id.tv_name); mCheckBox = (CheckBox) findViewById(android.R.id.checkbox); } ///根据data的属性对各个控件的属性的控制，主要是可见性Visibility，内容setText，格式setTextAppearance public void bind(Context context, NoteItemData data, boolean choiceMode, boolean checked) { if (choiceMode && data.getType() == Notes.TYPE_NOTE) { mCheckBox.setVisibility(View.VISIBLE); ///设置可见行为可见 mCheckBox.setChecked(checked); ///格子打钩 } else { mCheckBox.setVisibility(View.GONE); } mItemData = data; ///设置控件属性，一共三种情况，由data的id和父id是否与保存到文件夹的id一致来决定 if (data.getId() == Notes.ID_CALL_RECORD_FOLDER) { mCallName.setVisibility(View.GONE); mAlert.setVisibility(View.VISIBLE); //设置该textview的style mTitle.setTextAppearance(context, R.style.TextAppearancePrimaryItem); //settext为设置内容 mTitle.setText(context.getString(R.string.call_record_folder_name) + context.getString(R.string.format_folder_files_count, data.getNotesCount())); mAlert.setImageResource(R.drawable.call_record); } else if (data.getParentId() == Notes.ID_CALL_RECORD_FOLDER) { mCallName.setVisibility(View.VISIBLE); mCallName.setText(data.getCallName()); mTitle.setTextAppearance(context,R.style.TextAppearanceSecondaryItem); mTitle.setText(DataUtils.getFormattedSnippet(data.getSnippet())); ///关于闹钟的设置 if (data.hasAlert()) { mAlert.setImageResource(R.drawable.clock);//图片来源的设置 mAlert.setVisibility(View.VISIBLE); } else { mAlert.setVisibility(View.GONE); } } else { mCallName.setVisibility(View.GONE); mTitle.setTextAppearance(context, R.style.TextAppearancePrimaryItem); ///设置title格式 if (data.getType() == Notes.TYPE_FOLDER) { mTitle.setText(data.getSnippet() + context.getString(R.string.format_folder_files_count, data.getNotesCount())); mAlert.setVisibility(View.GONE); } else { mTitle.setText(DataUtils.getFormattedSnippet(data.getSnippet())); if (data.hasAlert()) { mAlert.setImageResource(R.drawable.clock);///设置图片来源 mAlert.setVisibility(View.VISIBLE); } else { mAlert.setVisibility(View.GONE); } } } ///设置内容，获取相关时间，从data里编辑的日期中获取 mTime. setText(DateUtils.getRelativeTimeSpanString(data.getModifiedDate())); setBackground(data); } //根据data的文件属性来设置背景 private void setBackground(NoteItemData data) { int id = data.getBgColorId(); //，若是note型文件，则4种情况，对于4种不同情况的背景来源 if (data.getType() == Notes.TYPE_NOTE) { //单个数据并且只有一个子文件夹 if (data.isSingle() || data.isOneFollowingFolder()) { setBackgroundResource(NoteItemBgResources.getNoteBgSingleRes(id)); } else if (data.isLast()) {//是最后一个数据 setBackgroundResource(NoteItemBgResources.getNoteBgLastRes(id)); } else if (data.isFirst() || data.isMultiFollowingFolder()) {//是一个数据并有多个子文件夹 setBackgroundResource(NoteItemBgResources.getNoteBgFirstRes(id)); } else { setBackgroundResource(NoteItemBgResources.getNoteBgNormalRes(id)); } } else { //若不是note直接调用文件夹的背景来源 setBackgroundResource(NoteItemBgResources.getFolderBgRes()); } } public NoteItemData getItemData() { return mItemData; }}14、NotesPreferenceActivity.java
package net.micode.notes.ui;import android.accounts.Account;import android.accounts.AccountManager;import android.app.ActionBar;import android.app.AlertDialog;import android.content.BroadcastReceiver;import android.content.ContentValues;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.content.IntentFilter;import android.content.SharedPreferences;import android.os.Bundle;import android.preference.Preference;import android.preference.Preference.OnPreferenceClickListener;import android.preference.PreferenceActivity;import android.preference.PreferenceCategory;import android.text.TextUtils;import android.text.format.DateFormat;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;import net.micode.notes.R;import net.micode.notes.data.Notes;import net.micode.notes.data.Notes.NoteColumns;import net.micode.notes.gtask.remote.GTaskSyncService;public class NotesPreferenceActivity extends PreferenceActivity { public static final String PREFERENCE_NAME = "notes_preferences"; //优先名 public static final String PREFERENCE_SYNC_ACCOUNT_NAME = "pref_key_account_name"; //同步账号 public static final String PREFERENCE_LAST_SYNC_TIME = "pref_last_sync_time"; //同步时间 public static final String PREFERENCE_SET_BG_COLOR_KEY = "pref_key_bg_random_appear"; private static final String PREFERENCE_SYNC_ACCOUNT_KEY = "pref_sync_account_key"; //同步密码 private static final String AUTHORITIES_FILTER_KEY = "authorities"; //本地密码 private PreferenceCategory mAccountCategory; //账户分组 private GTaskReceiver mReceiver; //同步任务接收器 private Account[] mOriAccounts; //账户 private boolean mHasAddedAccount; //账户的hash标记 @Override protected void onCreate(Bundle icicle) { //先执行父类的创建函数 super.onCreate(icicle); getActionBar().setDisplayHomeAsUpEnabled(true); //给左上角图标的左边加上一个返回的图标 addPreferencesFromResource(R.xml.preferences); //添加xml来源并显示 xml mAccountCategory = (PreferenceCategory) findPreference(PREFERENCE_SYNC_ACCOUNT_KEY); //根据同步账户关键码来初始化分组 mReceiver = new GTaskReceiver(); IntentFilter filter = new IntentFilter(); filter.addAction(GTaskSyncService.GTASK_SERVICE_BROADCAST_NAME); registerReceiver(mReceiver, filter); //初始化同步组件 mOriAccounts = null; View header = LayoutInflater.from(this).inflate(R.layout.settings_header, null); //获取listvivew，ListView的作用:用于列出所有选择 getListView().addHeaderView(header, null, true); //在listview组件上方添加其他组件 } @Override protected void onResume() { //先执行父类 的交互实现 super.onResume(); // need to set sync account automatically if user has added a new // account if (mHasAddedAccount) { //若用户新加了账户则自动设置同步账户 Account[] accounts = getGoogleAccounts(); //获取google同步账户 if (mOriAccounts != null && accounts.length > mOriAccounts.length) { //若原账户不为空且当前账户有增加 for (Account accountNew : accounts) { boolean found = false; for (Account accountOld : mOriAccounts) { if (TextUtils.equals(accountOld.name, accountNew.name)) { //更新账户found = true;break; } } if (!found) { setSyncAccount(accountNew.name); //若是没有找到旧的账户，那么同步账号中就只添加新账户 break; } } } } refreshUI(); //刷新标签界面 } @Override protected void onDestroy() { if (mReceiver != null) { unregisterReceiver(mReceiver); //注销接收器 } super.onDestroy(); //执行父类的销毁动作 } private void loadAccountPreference() { mAccountCategory.removeAll(); //销毁所有的分组 Preference accountPref = new Preference(this); //建立首选项 final String defaultAccount = getSyncAccountName(this); accountPref.setTitle(getString(R.string.preferences_account_title)); accountPref.setSummary(getString(R.string.preferences_account_summary)); //设置首选项的大和小 accountPref.setOnPreferenceClickListener(new OnPreferenceClickListener() { public boolean onPreferenceClick(Preference preference) { //建立监听器 if (!GTaskSyncService.isSyncing()) { if (TextUtils.isEmpty(defaultAccount)) { // the first time to set account //若是第一次建立账户显示选择账户提示对话框 showSelectAccountAlertDialog(); } else { // if the account has already been set, we need to promp // user about the risk //若是已经建立则显示修改对话框并进行修改操作 showChangeAccountConfirmAlertDialog(); } } else { //若在没有同步的情况下，则在toast中显示不能修改 Toast.makeText(NotesPreferenceActivity.this,R.string.preferences_toast_cannot_change_account, Toast.LENGTH_SHORT).show(); } return true; } }); //根据新建首选项编辑新的账户分组 mAccountCategory.addPreference(accountPref); } private void loadSyncButton() { Button syncButton = (Button) findViewById(R.id.preference_sync_button); TextView lastSyncTimeView = (TextView) findViewById(R.id.prefenerece_sync_status_textview); //获取同步按钮控件和最终同步时间的的窗口 // set button state //设置按钮的状态 if (GTaskSyncService.isSyncing()) { //若是在同步状态下 syncButton.setText(getString(R.string.preferences_button_sync_cancel)); syncButton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { GTaskSyncService.cancelSync(NotesPreferenceActivity.this); } }); //设置按钮显示的文本为“取消同步”以及监听器 } else { syncButton.setText(getString(R.string.preferences_button_sync_immediately)); syncButton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { GTaskSyncService.startSync(NotesPreferenceActivity.this); } }); //若是不同步则设置按钮显示的文本为“立即同步”以及对应监听器 } syncButton.setEnabled(!TextUtils.isEmpty(getSyncAccountName(this))); //设置按键可用还是不可用 // set last sync time // 设置最终同步时间 if (GTaskSyncService.isSyncing()) { //若是在同步的情况下 lastSyncTimeView.setText(GTaskSyncService.getProgressString()); lastSyncTimeView.setVisibility(View.VISIBLE); // 根据当前同步服务器设置时间显示框的文本以及可见性 } else { //若是非同步情况 long lastSyncTime = getLastSyncTime(this); if (lastSyncTime != 0) { lastSyncTimeView.setText(getString(R.string.preferences_last_sync_time, DateFormat.format(getString(R.string.preferences_last_sync_time_format), lastSyncTime))); lastSyncTimeView.setVisibility(View.VISIBLE); //则根据最后同步时间的信息来编辑时间显示框的文本内容和可见性 } else { //若时间为空直接设置为不可见状态 lastSyncTimeView.setVisibility(View.GONE); } } } private void refreshUI() { loadAccountPreference(); loadSyncButton(); } private void showSelectAccountAlertDialog() { AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this); //创建一个新的对话框 View titleView = LayoutInflater.from(this).inflate(R.layout.account_dialog_title, null); TextView titleTextView = (TextView) titleView.findViewById(R.id.account_dialog_title); titleTextView.setText(getString(R.string.preferences_dialog_select_account_title)); TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle); subtitleTextView.setText(getString(R.string.preferences_dialog_select_account_tips)); //设置以及子的内容 dialogBuilder.setCustomTitle(titleView); dialogBuilder.setPositiveButton(null, null); //设置对话框的自定义，建立一个YES的按钮 Account[] accounts = getGoogleAccounts(); String defAccount = getSyncAccountName(this); //获取同步账户信息 mOriAccounts = accounts; mHasAddedAccount = false; if (accounts.length > 0) { //若账户不为空 CharSequence[] items = new CharSequence[accounts.length]; final CharSequence[] itemMapping = items; int checkedItem = -1; int index = 0; for (Account account : accounts) { if (TextUtils.equals(account.name, defAccount)) { checkedItem = index; //在账户列表中查询到所需账户 } items[index++] = account.name; } dialogBuilder.setSingleChoiceItems(items, checkedItem, //在对话框建立一个单选的复选框 new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) {setSyncAccount(itemMapping[which].toString());dialog.dismiss();//取消对话框refreshUI(); } //设置点击后执行的事件，包括检录新同步账户和刷新标签界面 }); //建立对话框网络版的监听器 } View addAccountView = LayoutInflater.from(this).inflate(R.layout.add_account_text, null); dialogBuilder.setView(addAccountView); //给新加账户对话框设置自定义样式 final AlertDialog dialog = dialogBuilder.show(); //显示对话框 addAccountView.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { mHasAddedAccount = true; //将新加账户的hash置true Intent intent = new Intent("android.settings.ADD_ACCOUNT_SETTINGS"); //建立网络建立组件 intent.putExtra(AUTHORITIES_FILTER_KEY, new String[] { "gmail-ls" }); startActivityForResult(intent, -1); //跳回上一个选项 dialog.dismiss(); } }); //建立新加账户对话框的监听器 } private void showChangeAccountConfirmAlertDialog() { AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this); //创建一个新的对话框 View titleView = LayoutInflater.from(this).inflate(R.layout.account_dialog_title, null); TextView titleTextView = (TextView) titleView.findViewById(R.id.account_dialog_title); titleTextView.setText(getString(R.string.preferences_dialog_change_account_title, getSyncAccountName(this))); TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle); subtitleTextView.setText(getString(R.string.preferences_dialog_change_account_warn_msg)); //根据同步修改的账户信息设置以及子的内容 dialogBuilder.setCustomTitle(titleView); //设置对话框的自定义 CharSequence[] menuItemArray = new CharSequence[] { getString(R.string.preferences_menu_change_account), getString(R.string.preferences_menu_remove_account), getString(R.string.preferences_menu_cancel) }; //定义一些标记字符串 dialogBuilder.setItems(menuItemArray, new DialogInterface.OnClickListener() { //设置对话框要显示的一个list，用于显示几个命令时,即change，remove，cancel public void onClick(DialogInterface dialog, int which) { //按键功能，由which来决定 if (which == 0) { //进入账户选择对话框 showSelectAccountAlertDialog(); } else if (which == 1) { //删除账户并且跟新便签界面 removeSyncAccount(); refreshUI(); } } }); dialogBuilder.show(); //显示对话框 } private Account[] getGoogleAccounts() { AccountManager accountManager = AccountManager.get(this); return accountManager.getAccountsByType("com.google"); } private void setSyncAccount(String account) { if (!getSyncAccountName(this).equals(account)) { //假如该账号不在同步账号列表中 SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE); SharedPreferences.Editor editor = settings.edit(); //编辑共享的首选项 if (account != null) { editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, account); } else { editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, ""); } //将该账号加入到首选项中 editor.commit(); //提交修改的数据 setLastSyncTime(this, 0); //将最后同步时间清零 // clean up local gtask related info new Thread(new Runnable() { public void run() { ContentValues values = new ContentValues(); values.put(NoteColumns.GTASK_ID, ""); values.put(NoteColumns.SYNC_ID, 0); getContentResolver().update(Notes.CONTENT_NOTE_URI, values, null, null); } }).start(); //重置当地同步任务的信息 Toast.makeText(NotesPreferenceActivity.this, getString(R.string.preferences_toast_success_set_accout, account), Toast.LENGTH_SHORT).show(); //将toast的文本信息置为“设置账户成功”并显示出来 } } private void removeSyncAccount() { SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE); SharedPreferences.Editor editor = settings.edit(); //设置共享首选项 if (settings.contains(PREFERENCE_SYNC_ACCOUNT_NAME)) { editor.remove(PREFERENCE_SYNC_ACCOUNT_NAME); //假如当前首选项中有账户就删除 } if (settings.contains(PREFERENCE_LAST_SYNC_TIME)) { editor.remove(PREFERENCE_LAST_SYNC_TIME); //删除当前首选项中有账户时间 } editor.commit(); //提交更新后的数据 // clean up local gtask related info new Thread(new Runnable() { public void run() { ContentValues values = new ContentValues(); values.put(NoteColumns.GTASK_ID, ""); values.put(NoteColumns.SYNC_ID, 0); getContentResolver().update(Notes.CONTENT_NOTE_URI, values, null, null); } }).start(); //重置当地同步任务的信息 } public static String getSyncAccountName(Context context) { SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE); return settings.getString(PREFERENCE_SYNC_ACCOUNT_NAME, ""); } public static void setLastSyncTime(Context context, long time) { SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE); SharedPreferences.Editor editor = settings.edit(); // 从共享首选项中找到相关账户并获取其编辑器 editor.putLong(PREFERENCE_LAST_SYNC_TIME, time); editor.commit(); //编辑最终同步时间并提交更新 } public static long getLastSyncTime(Context context) { SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE); return settings.getLong(PREFERENCE_LAST_SYNC_TIME, 0); } private class GTaskReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { refreshUI(); if (intent.getBooleanExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_IS_SYNCING, false)) { //获取随广播而来的Intent中的同步服务的数据 TextView syncStatus = (TextView) findViewById(R.id.prefenerece_sync_status_textview); syncStatus.setText(intent .getStringExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_PROGRESS_MSG)); //通过获取的数据在设置系统的状态 } } } public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { //根据选项的id选择，这里只有一个主页 case android.R.id.home: Intent intent = new Intent(this, NotesListActivity.class); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(intent); return true; //在主页情况下在创建连接组件intent，发出清空的信号并开始一个相应的activity default: return false; } }}来源地址：https://blog.csdn.net/edgarrr/article/details/127589226
