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         } );

 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 }