DFdou's Blog Life is short,Be yourself.

Android-OnGestureListener接口

在做应用的时候难免会碰到触摸事件，Android提供了不少事件，只要实现OnGestureListener接口，并且呢，在onTouch方法里写个：

//记得要implements OnTouchListener,OnGestureListener
//public class mGestureDetector extends Activity implements OnTouchListener,OnGestureListener
private GestureDetector mGestureDetector;
@Override
public void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	// setContentView(R.layout.main);
	View v = new View(this);
	setContentView(v);
        //mGestureDetector是个GestureDetector对象，记得初始化一下。
	mGestureDetector = new GestureDetector(this);
        //另外呢，需要针对onFling方法的监听，需要在监听的View里边加上：
	v.setOnTouchListener(this);
	v.setLongClickable(true);
}
public boolean onTouch(View v, MotionEvent mo) {
	return mGestureDetector.onTouchEvent(mo);
}

另外是OnGestureListener接口必须实现的几个方法，具体要怎么实现大家自个儿对号入座吧。

public boolean onDown(MotionEvent e) {
	return false;
}
public void onLongPress(MotionEvent e) {
}
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
    float distanceY) {
	return false;
}
public void onShowPress(MotionEvent e) {
}
public boolean onSingleTapConfirmed(MotionEvent e) {
	return false;
}
public boolean onSingleTapUp(MotionEvent e) {
	return false;
}
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
    float velocityY) {
	return true;
}