看代码学Android ：如何处理Touch？

public class test2 extends Activity implements OnTouchListener, OnClickListener{
    /** Called when the activity is first created. */

    GestureDetector mGestureDetector;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Button btn = (Button)this.findViewById(R.id.button1);
        btn.setOnTouchListener(this);
        btn.setOnClickListener(this);

        //创建一个手势dectector
        mGestureDetector = new GestureDetector(this, new CalendarGestureListener());
    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        if (mGestureDetector.onTouchEvent(event)) {
            return true;
        }
        return super.onTouchEvent(event);
    }


     class CalendarGestureListener extends GestureDetector.SimpleOnGestureListener {

        /* (non-Javadoc)
         * @see android.view.GestureDetector.SimpleOnGestureListener#onFling(android.view.MotionEvent, android.view.MotionEvent, float, float)
         */
        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
                float velocityY) {
            Log.v("touch", "x=" + Float.toString(e1.getX()) + " x2=" + Float.toString(e2.getX()) );
            // TODO Auto-generated method stub
            return super.onFling(e1, e2, velocityX, velocityY);
        }
     }


    @Override
    public void onClick(View arg0) {
        // TODO Auto-generated method stub
        Log.v("touch", "Hello, Click Me" );

    }
}