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  • 【安卓4】事件处理——键盘事件、触摸事件

    OnKeyListener(键盘事件)

             正则表达式       w:任意字符   +:一个或一个以上字符

     1 TextView tv=(TextView) findViewById(R.id.keyTV02);
     2 EditText input=(EditText) findViewById(R.id.keyET01);
     3 ImageView img=(ImageView) findViewById(R.id.keyImg01);
     4 input.setOnKeyListener(new OnKeyListener(){
     5     public boolean onKey(View v, int keyCode, KeyEvent event) {
     6         switch(event.getAction()){
     7             case KeyEvent.ACTION_UP:        //键盘松开触发
     8                 String str=input.getText().toString();
     9                 if(str.matches("\w+@\w+\.\w+")){    //判断是否是Email
    10                     img.setImageResource(R.drawable.图片名称);
    11                     tv.setVisibility (View. INVISIBLE);     //设置文字显示或隐藏
    12                 }else{
    13                     img.setImageResource(R.drawable.图片名称);
    14                     tv.setVisibility (View.VISIBLE);
    15                 }
    16             case KeyEvent.ACTION_DOWN:        //键盘按下触发
    17             default:
    18                 break;
    19             }
    20             return false;
    21         } );
    OnKeyListener

    OnTouchListener(触摸事件)

     1 protected void onCreate(Bundle savedInstanceState) {
     2     super.onCreate(savedInstanceState);
     3     setContentView(R.layout.touch);
     4     ImageView iv=(ImageView)findViewById(R.id.ImgV);
     5     TextView tv=(TextView)findViewById(R.id.TV);
     6     iv.setOnTouchListener(new OnTouchListener() {
     7         public boolean onTouch(View v, MotionEvent event) {
     8             String str = event.getX()+","+event.getY();
     9             tv.setText(str);
    10             return false;
    11         }
    12     });
    13 }
    OnTouchListener
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  • 原文地址:https://www.cnblogs.com/leelee/p/6906927.html
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