Android手势事件检测GestureDetector

上代码

public class MainActivity extends Activity {
    protected static final float FLIP_DISTANCE = 50;
    GestureDetector mDetector;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mDetector = new GestureDetector(this, new OnGestureListener() {

            @Override
            public boolean onSingleTapUp(MotionEvent e) {
                // TODO Auto-generated method stub
                return false;
            }

            @Override
            public void onShowPress(MotionEvent e) {
                // TODO Auto-generated method stub

            }

            @Override
            public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
                // TODO Auto-generated method stub
                return false;
            }

            @Override
            public void onLongPress(MotionEvent e) {
                // TODO Auto-generated method stub

            }

            /**
             *
             * e1 The first down motion event that started the fling. e2 The
             * move motion event that triggered the current onFling.
             */
            @Override
            public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
                if (e1.getX() - e2.getX() > FLIP_DISTANCE) {
                    Log.i("MYTAG", "向左滑...");
                    return true;
                }
                if (e2.getX() - e1.getX() > FLIP_DISTANCE) {
                    Log.i("MYTAG", "向右滑...");
                    return true;
                }
                if (e1.getY() - e2.getY() > FLIP_DISTANCE) {
                    Log.i("MYTAG", "向上滑...");
                    return true;
                }
                if (e2.getY() - e1.getY() > FLIP_DISTANCE) {
                    Log.i("MYTAG", "向下滑...");
                    return true;
                }

                Log.d("TAG", e2.getX() + " " + e2.getY());

                return false;
            }

            @Override
            public boolean onDown(MotionEvent e) {
                // TODO Auto-generated method stub
                return false;
            }
        });
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        return mDetector.onTouchEvent(event);
    }
}