近公司接了一个项目,需要会安卓,人手不够的情况作为一个开发iOS的也需要跟进,开始学习android,集成开发环境以后。直接就被难到了,iOS里面的分栏控制器(tabbarcontroller)android里面根本没有这个控件,安卓都是自己来实现这个效果的。所以开始研究android是如何实现的,下面这些代码。
当我们创建一个android APP项目的时候会自动生成一个MainActivity,我们可以在这Activity实现这个效果。首先我们先看一下效果图
代码实现
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@color/app_ui_bg"
tools:context="com.zkteco.pridebiosecurity.view.MainActivity">
<FrameLayout
android:id="@+id/main_fl"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
<View
android:layout_width="match_parent"
android:layout_height="1px"
android:background="@color/gray2"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="@dimen/d50"
android:background="@color/white"
android:orientation="horizontal">
<LinearLayout
android:id="@+id/message_ll"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="@+id/message_iv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:scaleType="centerInside"
android:src="@mipmap/ic_message_1"/>
<TextView
android:id="@+id/message_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/d3"
android:text="@string/message"
android:textColor="@color/app_style_color"
android:textSize="@dimen/s11"/>
</LinearLayout>
<LinearLayout
android:id="@+id/clock_ll"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="@+id/clock_iv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:scaleType="centerInside"
android:src="@mipmap/ic_clock_0"/>
<TextView
android:id="@+id/clock_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/d3"
android:text="@string/clock"
android:textColor="@color/gray"
android:textSize="@dimen/s11"/>
</LinearLayout>
<LinearLayout
android:id="@+id/home_ll"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="@+id/home_iv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:scaleType="centerInside"
android:src="@mipmap/ic_home_0"/>
<TextView
android:id="@+id/home_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/d3"
android:text="@string/home"
android:textColor="@color/gray"
android:textSize="@dimen/s11"/>
</LinearLayout>
<LinearLayout
android:id="@+id/entrance_ll"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="@+id/entrance_iv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:scaleType="centerInside"
android:src="@mipmap/ic_entrance_0"/>
<TextView
android:id="@+id/entrance_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/d3"
android:text="@string/entrance"
android:textColor="@color/gray"
android:textSize="@dimen/s11"/>
</LinearLayout>
<LinearLayout
android:id="@+id/me_ll"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="@+id/me_iv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:scaleType="centerInside"
android:src="@mipmap/ic_me_0"/>
<TextView
android:id="@+id/me_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/d3"
android:text="@string/me"
android:textColor="@color/gray"
android:textSize="@dimen/s11"/>
</LinearLayout>
</LinearLayout>
</LinearLayout>
这样页面我们就实现了。
接下来就是点击切换页面的效果实现了,代码主要就是实现点击切换页面的功能。所以我们要关联一下五个Fragment了
package com.zkteco.pridebiosecurity.view;
import android.annotation.SuppressLint;
import android.os.Build;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.zkteco.pridebiosecurity.R;
import com.zkteco.pridebiosecurity.base.BaseActivity;
import com.zkteco.pridebiosecurity.base.BaseFragment;
import com.zkteco.pridebiosecurity.util.StatusBarUtil;
import com.zkteco.pridebiosecurity.view.clock.ClockFragment;
import com.zkteco.pridebiosecurity.view.entrance.EntranceFragment;
import com.zkteco.pridebiosecurity.view.home.HomeFragment;
import com.zkteco.pridebiosecurity.view.me.MeFragment;
import com.zkteco.pridebiosecurity.view.message.MessageFragment;
import com.zkteco.pridebiosecurity.widget.TitleBar;
public class MainActivity extends BaseActivity implements OnClickListener {
private LinearLayout mMessageLl, mColckLl, mHomeLl, mEntranceLl, mMeLl;
private ImageView mMessageIv, mColckIv, mHomeIv, mEntranceIv, mMeIv;
private TextView mMessageTv, mColckTv, mHomeTv, mEntranceTv, mMeTv;
private BaseFragment baseFragment;
@Override
protected int bindLayout() {
return R.layout.activity_main;
}
@Override
protected void initView() {
// 设置状态栏背景蓝色,文字白色
StatusBarUtil.setStatusBarLightMode(this, false);
mMessageLl = bindView(R.id.message_ll);
mColckLl = bindView(R.id.clock_ll);
mHomeLl = bindView(R.id.home_ll);
mEntranceLl = bindView(R.id.entrance_ll);
mMeLl = bindView(R.id.me_ll);
mMessageIv = bindView(R.id.message_iv);
mColckIv = bindView(R.id.clock_iv);
mHomeIv = bindView(R.id.home_iv);
mEntranceIv = bindView(R.id.entrance_iv);
mMeIv = bindView(R.id.me_iv);
mMessageTv = bindView(R.id.message_tv);
mColckTv = bindView(R.id.clock_tv);
mHomeTv = bindView(R.id.home_tv);
mEntranceTv = bindView(R.id.entrance_tv);
mMeTv = bindView(R.id.me_tv);
changeFragment(MessageFragment.class, 0);
}
@Override
protected void initData() {
}
@Override
protected void setListeners() {
mMessageLl.setOnClickListener(this);
mColckLl.setOnClickListener(this);
mHomeLl.setOnClickListener(this);
mEntranceLl.setOnClickListener(this);
mMeLl.setOnClickListener(this);
}
@Override
protected void autoRefresh() {
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.message_ll:
changeFragment(MessageFragment.class, 0);
break;
case R.id.clock_ll:
changeFragment(ClockFragment.class, 1);
break;
case R.id.home_ll:
changeFragment(HomeFragment.class, 2);
break;
case R.id.entrance_ll:
changeFragment(EntranceFragment.class, 3);
break;
case R.id.me_ll:
changeFragment(MeFragment.class, 4);
break;
}
}
public void changeFragment(Class<? extends Fragment> clazz, int position) {
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
Fragment fragment = fm.findFragmentByTag(clazz.getName());
if (fragment == null) {
try {
fragment = clazz.newInstance();
} catch (Exception e) {
e.printStackTrace();
}
}
if (baseFragment != null && baseFragment != fragment) {
ft.hide(baseFragment);
}
if (!fragment.isAdded()) {
ft.add(R.id.main_fl, fragment, clazz.getName());
} else {
ft.show(fragment);
}
ft.commitAllowingStateLoss();
baseFragment = (BaseFragment) fragment;
mMessageIv.setImageResource(R.mipmap.ic_message_0);
mColckIv.setImageResource(R.mipmap.ic_clock_0);
mHomeIv.setImageResource(R.mipmap.ic_home_0);
mEntranceIv.setImageResource(R.mipmap.ic_entrance_0);
mMeIv.setImageResource(R.mipmap.ic_me_0);
mMessageTv.setTextColor(getResources().getColor(R.color.gray));
mColckTv.setTextColor(getResources().getColor(R.color.gray));
mHomeTv.setTextColor(getResources().getColor(R.color.gray));
mEntranceTv.setTextColor(getResources().getColor(R.color.gray));
mMeTv.setTextColor(getResources().getColor(R.color.gray));
if (position == 0) {
mMessageIv.setImageResource(R.mipmap.ic_message_1);
mMessageTv.setTextColor(getResources().getColor(R.color.app_style_color));
} else if (position == 1) {
mColckIv.setImageResource(R.mipmap.ic_clock_1);
mColckTv.setTextColor(getResources().getColor(R.color.app_style_color));
} else if (position == 2) {
mHomeIv.setImageResource(R.mipmap.ic_home_1);
mHomeTv.setTextColor(getResources().getColor(R.color.app_style_color));
} else if (position == 3) {
mEntranceIv.setImageResource(R.mipmap.ic_entrance_1);
mEntranceTv.setTextColor(getResources().getColor(R.color.app_style_color));
} else if (position == 4) {
mMeIv.setImageResource(R.mipmap.ic_me_1);
mMeTv.setTextColor(getResources().getColor(R.color.app_style_color));
}
}
}
这里呢,每一个Fragment都继承了BaseFragment,下面是BaseFragment的代码实现
package com.zkteco.pridebiosecurity.base;
import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.FragmentManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.zkteco.pridebiosecurity.widget.LoadingDialog;
public abstract class BaseFragment extends android.support.v4.app.Fragment {
protected Context mContext;
private LoadingDialog mABLoadingDialog;
protected View mRootView;
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
@Nullable
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(bindLayout(), container, false);
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mABLoadingDialog = new LoadingDialog(getActivity());
mContext = getActivity();
mRootView = view;
initView();
}
protected <T extends View> T bindView(int id) {
@SuppressWarnings("unchecked") T t = (T) mRootView.findViewById(id);
return t;
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
initData();
setListeners();
}
@Override
public void onResume() {
super.onResume();
autoRefresh();
}
protected abstract int bindLayout();
protected abstract void initView();
protected abstract void initData();
protected abstract void setListeners();
protected abstract void autoRefresh();
public void showOrHideWaitBar(boolean show) {
if (mABLoadingDialog != null) {
if (show) {
mABLoadingDialog.show();
} else {
mABLoadingDialog.dismiss();
}
}
}
@Override
public void onDestroy() {
if (mABLoadingDialog != null && mABLoadingDialog.isDialogShowing()) {
mABLoadingDialog.dismiss();
}
super.onDestroy();
}
}
MainActivity继承BaseActivity,下面便是BaseActivity实现代码
package com.zkteco.pridebiosecurity.base;
import android.annotation.SuppressLint;
import android.content.Context;
import android.os.Build;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import com.zkteco.pridebiosecurity.R;
import com.zkteco.pridebiosecurity.util.StatusBarUtil;
import com.zkteco.pridebiosecurity.widget.LoadingDialog;
@SuppressLint("NewApi")
public abstract class BaseActivity extends AppCompatActivity {
private LoadingDialog mABLoadingDialog;
protected Context mContext;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
BaseApplication.getInstance().addActivity(this);
// 设置状态栏背景白色,文字黑色
StatusBarUtil.setStatusBarLightMode(this, true);
setContentView(bindLayout());
mABLoadingDialog = new LoadingDialog(this);
mContext = this;
initView();
initData();
setListeners();
}
@Override
protected void onResume() {
super.onResume();
autoRefresh();
}
@Override
public void finish() {
BaseApplication.getInstance().removeAcitivity(this);
super.finish();
}
protected <T extends View> T bindView(int id) {
@SuppressWarnings("unchecked") T t = (T) findViewById(id);
return t;
}
protected abstract int bindLayout();
protected abstract void initView();
protected abstract void initData();
protected abstract void setListeners();
protected abstract void autoRefresh();
public void showOrHideWaitBar(boolean show) {
if (mABLoadingDialog != null) {
if (show) {
mABLoadingDialog.show();
} else {
mABLoadingDialog.dismiss();
}
}
}
@Override
public void onDestroy() {
if (mABLoadingDialog != null && mABLoadingDialog.isDialogShowing()) {
mABLoadingDialog.dismiss();
}
super.onDestroy();
}
}
以上便实现了,这个功能的所有效果。
当我们APP使用时也会常用到Application,也就是iOS里面的AppDelegate。可以方便我们实现很多方法
下面是Application的实现
package com.zkteco.pridebiosecurity.base;
import android.app.Activity;
import android.app.Application;
import android.content.Intent;
import com.zkteco.pridebiosecurity.util.CrashHandler;
import com.zkteco.pridebiosecurity.view.login.LoginActivity;
import java.util.Set;
import java.util.WeakHashMap;
public class BaseApplication extends Application {
private final WeakHashMap<Activity, Integer> mActivityGroup = new WeakHashMap<>(1);
private static BaseApplication sInstance = null;
@Override
public void onCreate() {
super.onCreate();
sInstance = this;
}
public static BaseApplication getInstance() {
return sInstance;
}
protected void addActivity(Activity a) {
mActivityGroup.put(a, 0);
}
protected void removeAcitivity(Activity a) {
mActivityGroup.remove(a);
}
public Activity getActivityOfClass(Class<?> c) {
Set<Activity> set = mActivityGroup.keySet();
for (Activity a : set) {
if (a.getClass() == c) {
return a;
}
}
return null;
}
public void exitAllActivities() {
while (mActivityGroup.size() > 0) {
Set<Activity> as = mActivityGroup.keySet();
((Activity[]) as.toArray())[0].finish();
}
mActivityGroup.clear();
}
}
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持编程网。