我们先来照图分析一下:
(1)限制输入6位,每一位都有自己的框格,每个格显示一位;
(2)有回退/取消支付按钮;
(3)有忘记密码链接;
(4)自定义的只能输入数字的键盘输入区;
(5)在6位输完后自动进行密码校验和支付交易。如上图左边是iOS支付宝支付密码输入控件,右边是我模仿实现的效果。
首先,我们需要一个页面来完成以上的静态布局,.xml代码如下:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#EEEEEE"
android:gravity="bottom">
<LinearLayout
android:id="@+id/linear_pass"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp">
<!-- 取消按钮 -->
<ImageView
android:id="@+id/img_cancel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/icon_clean" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="输入密码"
android:textColor="#898181"
android:textSize="20sp" />
</RelativeLayout>
<View
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:background="#555555" />
<!-- 6位密码框布局,需要一个圆角边框的shape作为layout的背景 -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="40dp"
android:layout_marginRight="40dp"
android:layout_marginTop="20dp"
android:background="@drawable/shape_input_area"
android:orientation="horizontal">
<!-- inputType设置隐藏密码明文
textSize设置大一点,否则“点”太小了,不美观 -->
<TextView
android:id="@+id/tv_pass1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:inputType="numberPassword"
android:textSize="32sp" />
<View
android:layout_width="1dp"
android:layout_height="match_parent"
android:background="#999999" />
<TextView
android:id="@+id/tv_pass2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:inputType="numberPassword"
android:textSize="32sp" />
<View
android:layout_width="1dp"
android:layout_height="match_parent"
android:background="#999999" />
<TextView
android:id="@+id/tv_pass3"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:inputType="numberPassword"
android:textSize="32sp" />
<View
android:layout_width="1dp"
android:layout_height="match_parent"
android:background="#999999" />
<TextView
android:id="@+id/tv_pass4"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:inputType="numberPassword"
android:textSize="32sp" />
<View
android:layout_width="1dp"
android:layout_height="match_parent"
android:background="#999999" />
<TextView
android:id="@+id/tv_pass5"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:inputType="numberPassword"
android:textSize="32sp" />
<View
android:layout_width="1dp"
android:layout_height="match_parent"
android:background="#999999" />
<TextView
android:id="@+id/tv_pass6"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:inputType="numberPassword"
android:textSize="32sp" />
</LinearLayout>
<!-- 忘记密码链接 -->
<TextView
android:id="@+id/tv_forgetPwd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_margin="15dp"
android:text="忘记密码?"
android:textColor="#354EEF" />
</LinearLayout>
<!-- 输入键盘 -->
<GridView
android:id="@+id/gv_keybord"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/linear_pass"
android:layout_marginTop="40dp"
android:background="@android:color/black"
android:horizontalSpacing="0.5dp"
android:numColumns="3"
android:verticalSpacing="0.5dp" />
</RelativeLayout>
其中需要圆角背景shape_input_area.xml:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<corners android:radius="5dp"/>
<stroke android:color="@android:color/darker_gray"
android:width="1dp"/>
<solid android:color="@android:color/white"/>
</shape>
需要数字按钮的背景selector_gride.xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_enabled="false">
<shape>
<solid android:color="#C0C4C7" />
</shape>
</item>
<item android:state_enabled="true" android:state_pressed="false">
<shape>
<solid android:color="@android:color/white" />
</shape>
</item>
<item android:state_enabled="true" android:state_pressed="true">
<shape>
<solid android:color="#C0C4C7" />
</shape>
</item>
</selector>
需要回退键背景selector_key_del.xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_enabled="false">
<shape>
<solid android:color="#C0C4C7" />
</shape>
</item>
<item android:state_enabled="true" android:state_pressed="false">
<shape>
<solid android:color="#C0C4C7" />
</shape>
</item>
<item android:state_enabled="true" android:state_pressed="true">
<shape>
<solid android:color="@android:color/white" />
</shape>
</item>
</selector>
下面来完成我们的自定义控件PasswordView.Java:
public class PasswordView extends RelativeLayout implements View.OnClickListener {
Context context;
private String strPassword; //输入的密码
private TextView[] tvList; //用数组保存6个TextView,为什么用数组?
//因为就6个输入框不会变了,用数组内存申请固定空间,比List省空间(自己认为)
private GridView gridView; //用GrideView布局键盘,其实并不是真正的键盘,只是模拟键盘的功能
private ArrayList<Map<String, String>> valueList; //有人可能有疑问,为何这里不用数组了?
//因为要用Adapter中适配,用数组不能往adapter中填充
private ImageView imgCancel;
private TextView tvForget;
private int currentIndex = -1; //用于记录当前输入密码格位置
public PasswordView(Context context) {
this(context, null);
}
public PasswordView(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
View view = View.inflate(context, R.layout.layout_popup_bottom, null);
valueList = new ArrayList<Map<String, String>>();
tvList = new TextView[6];
imgCancel = (ImageView) view.findViewById(R.id.img_cancel);
imgCancel.setOnClickListener(this);
tvForget = (TextView) findViewById(R.id.tv_forgetPwd);
tvForget.setOnClickListener(this);
tvList[0] = (TextView) view.findViewById(R.id.tv_pass1);
tvList[1] = (TextView) view.findViewById(R.id.tv_pass2);
tvList[2] = (TextView) view.findViewById(R.id.tv_pass3);
tvList[3] = (TextView) view.findViewById(R.id.tv_pass4);
tvList[4] = (TextView) view.findViewById(R.id.tv_pass5);
tvList[5] = (TextView) view.findViewById(R.id.tv_pass6);
gridView = (GridView) view.findViewById(R.id.gv_keybord);
setView();
addView(view); //必须要,不然不显示控件
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.img_cancel:
Toast.makeText(context, "Cancel", Toast.LENGTH_SHORT).show();
break;
case R.id.tv_forgetPwd:
Toast.makeText(context, "Forget", Toast.LENGTH_SHORT).show();
break;
}
}
private void setView() {
for (int i = 1; i < 13; i++) {
Map<String, String> map = new HashMap<String, String>();
if (i < 10) {
map.put("name", String.valueOf(i));
} else if (i == 10) {
map.put("name", "");
} else if (i == 12) {
map.put("name", "<<-");
} else if (i == 11) {
map.put("name", String.valueOf(0));
}
valueList.add(map);
}
gridView.setAdapter(adapter);
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (position < 11 && position != 9) { //点击0~9按钮
if (currentIndex >= -1 && currentIndex < 5) { //判断输入位置————要小心数组越界
tvList[++currentIndex].setText(valueList.get(position).get("name"));
}
} else {
if (position == 11) { //点击退格键
if (currentIndex - 1 >= -1) { //判断是否删除完毕————要小心数组越界
tvList[currentIndex--].setText("");
}
}
}
}
});
}
//设置监听方法,在第6位输入完成后触发
public void setOnFinishInput(final OnPasswordInputFinish pass) {
tvList[5].addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable s) {
if (s.toString().length() == 1) {
strPassword = ""; //每次触发都要先将strPassword置空,再重新获取,避免由于输入删除再输入造成混乱
for (int i = 0; i < 6; i++) {
strPassword += tvList[i].getText().toString().trim();
}
pass.inputFinish(); //接口中要实现的方法,完成密码输入完成后的响应逻辑
}
}
});
}
public String getStrPassword() {
return strPassword;
}
public ImageView getCancelImageView() {
return imgCancel;
}
public TextView getForgetTextView() {
return tvForget;
}
//GrideView的适配器
BaseAdapter adapter = new BaseAdapter() {
@Override
public int getCount() {
return valueList.size();
}
@Override
public Object getItem(int position) {
return valueList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if (convertView == null) {
convertView = View.inflate(context, R.layout.item_gride, null);
viewHolder = new ViewHolder();
viewHolder.btnKey = (TextView) convertView.findViewById(R.id.btn_keys);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.btnKey.setText(valueList.get(position).get("name"));
if(position == 9){
viewHolder.btnKey.setBackgroundResource(R.drawable.selector_key_del);
viewHolder.btnKey.setEnabled(false);
}
if(position == 11){
viewHolder.btnKey.setBackgroundResource(R.drawable.selector_key_del);
}
return convertView;
}
};
public final class ViewHolder {
public TextView btnKey;
}
}
自认为代码注释还是可以的。就是在实现过程中要注意数组的越界问题,在输入逻辑响应中要注意逻辑处理,也就是grideView的OnItemClickListener事件处理。其中用到自定义的接口OnPasswordInputFinish来实现输入完成的事件回掉:
public interface OnPasswordInputFinish {
void inputFinish();
}
还有就是Adapter中用到的每个按钮Item的布局item_gride.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- 模拟键盘按钮,当然你可以用Button,但要注意Button和GrideView的点击响应问题 -->
<TextView
android:id="@+id/btn_keys"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="10dp"
android:gravity="center"
android:textSize="25sp"
android:background="@drawable/selector_gride"/>
</LinearLayout>
好了,到此我们的自定义控件——模仿支付宝6位支付密码输入控件就完成了,下边我们在Activity中用一下,检验一下效果:
我们在MianActivity中用用一下我们定义好的控件:
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final PasswordView pwdView = (PasswordView) findViewById(R.id.pwd_view);
//添加密码输入完成的响应
pwdView.setOnFinishInput(new OnPasswordInputFinish() {
@Override
public void inputFinish() {
//输入完成后我们简单显示一下输入的密码
//也就是说——>实现你的交易逻辑什么的在这里写
Toast.makeText(MainActivity.this, pwdView.getStrPassword(), Toast.LENGTH_SHORT).show();
}
});
pwdView.getCancelImageView().setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Biu Biu Biu", Toast.LENGTH_SHORT).show();
}
});
// final PasswordView pwdView = new PasswordView(this);
// setContentView(pwdView);
// pwdView.setOnFinishInput(new OnPasswordInputFinish() {
// @Override
// public void inputFinish() {
// Toast.makeText(MainActivity.this, pwdView.getStrPassword(), Toast.LENGTH_SHORT).show();
// }
// });
}
}
在第一种方法中我们用到的布局文件:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:id="@+id/xxx"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#624762">
<com.wangj.mypayview.PasswordView
android:id="@+id/pwd_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"/>
</RelativeLayout>
更多内容请参考专题:Android密码使用教程
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