【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

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

OnTouchListener(触摸事件)

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.touch);
    ImageView iv=(ImageView)findViewById(R.id.ImgV);
    TextView tv=(TextView)findViewById(R.id.TV);
    iv.setOnTouchListener(new OnTouchListener() {
        public boolean onTouch(View v, MotionEvent event) {
            String str = event.getX()+","+event.getY();
            tv.setText(str);
            return false;
        }
    });
}