触摸事件onTouchListener

1.效果图：

（1）MainAcivity.java

 1 package com.example.app3;
 2 
 3 import android.content.DialogInterface;
 4 import android.support.v7.app.AppCompatActivity;
 5 import android.os.Bundle;
 6 import android.view.KeyEvent;
 7 import android.view.View;
 8 import android.widget.EditText;
 9 import android.widget.TextView;
10 
11 public class MainActivity extends AppCompatActivity {
12     private EditText editText;
13     private TextView textView;
14 
15     @Override
16     protected void onCreate(Bundle savedInstanceState) {
17         super.onCreate(savedInstanceState);
18         setContentView(R.layout.activity_main);
19 
20         editText = (EditText) findViewById(R.id.et);
21         textView = (TextView) findViewById(R.id.tv_show);
22 
23         editText.setOnKeyListener(new View.OnKeyListener() {
24             @Override
25             public boolean onKey(View v, int keyCode, KeyEvent event) {
26             editText.setOnKeyListener(new View.OnKeyListener() {
27                 @Override
28                 public boolean onKey(View v, int keyCode, KeyEvent event) {
29                     switch (event.getAction()){
30                         case KeyEvent.ACTION_UP:
31                             String info = editText.getText().toString();
32                             textView.setText("您输入的银行卡号是："+subs(info));
33                         case  KeyEvent.ACTION_DOWN:
34                             break;
35                     }
36                     return false;
37                 }
38             });
39                 return false;
40             }
41         });
42 
43     }
44 
45     public String subs(String info){
46         String mess="";
47         for(int i =0;i<=info.length()/4;i++){
48             if(i*4+4<info.length()){
49                 mess=mess+info.substring(i*4,i*4+4)+"  ";
50             }else{
51                 mess=mess+info.substring(i*4,info.length());
52             }
53         }
54         return mess;
55     }
56 }

2.acivity_mian.xml

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     xmlns:tools="http://schemas.android.com/tools"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent"
 6     android:paddingBottom="@dimen/activity_vertical_margin"
 7     android:paddingLeft="@dimen/activity_horizontal_margin"
 8     android:paddingRight="@dimen/activity_horizontal_margin"
 9     android:paddingTop="@dimen/activity_vertical_margin"
10     tools:context="com.example.app3.MainActivity"
11     android:orientation="vertical">
12 
13     <EditText
14         android:id="@+id/et"
15         android:hint="请输入您的银行卡号"
16         android:layout_width="match_parent"
17         android:layout_height="wrap_content" />
18     <TextView
19         android:id="@+id/tv_show"
20         android:layout_width="wrap_content"
21         android:layout_height="wrap_content"
22         android:text="" />
23 </LinearLayout>