• 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>
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  • 原文地址:https://www.cnblogs.com/sunxiaoyan/p/9007129.html
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