Android如何使用GestureDetector进行手势检测详解

gestureDetector = new GestureDetector(context, new GestureDetector.OnGestureListener() {
    @Override
    public boolean onDown(MotionEvent e) {
        log("onDown");
        return true;
    }

    @Override
    public void onShowPress(MotionEvent e) {
        log("onShowPress");
    }

    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        log("onSingleTapUp");
        return true;
    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
        log("onScroll");
        return true;
    }

    @Override
    public void onLongPress(MotionEvent e) {
        log("onLongPress");
    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        log("onFling");
        return true;
    }
});

@Override
public boolean onTouchEvent(MotionEvent event) {
    boolean b = gestureDetector.onTouchEvent(event);
    if (b) {
        return true;
    }
    return super.onTouchEvent(event);
}

gestureDetector.setOnDoubleTapListener(new GestureDetector.OnDoubleTapListener() {
    @Override
    public boolean onSingleTapConfirmed(MotionEvent e) {
        log("onSingleTapConfirmed");
        return true;
    }

    @Override
    public boolean onDoubleTap(MotionEvent e) {
        log("onDoubleTap");
        return true;
    }

    @Override
    public boolean onDoubleTapEvent(MotionEvent e) {
        log("onDoubleTapEvent");
        return true;
    }
});
}

class SimpleGestureListener extends GestureDetector.SimpleOnGestureListener{
    @Override
    public boolean onDown(MotionEvent e) {

        return true;
    }
}

gestureDetector = new GestureDetector(context, new SimpleGestureListener());