android开发中为activity添加左右手势识别。如右滑关闭当前页面

/*

  *  for左右手势

  *  1.复制以下的内容到目标Activity

  *  2.目标Activity的onCreate()调用initGesture()

  *  3.目标Activity需implements OnTouchListener, OnGestureListener

  */

 private GestureDetector mGestureDetector;

 private int verticalMinDistance = 180;

 private int minVelocity         = 0;

 private void initGesture() {

     mGestureDetector = new GestureDetector((OnGestureListener) this);

 }

 public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {

     if (e1.getX() - e2.getX() > verticalMinDistance && Math.abs(velocityX) > minVelocity) {

         // 切换Activity

         // Intent intent = new Intent(ViewSnsActivity.this, UpdateStatusActivity.class);

         // startActivity(intent);

         //Toast.makeText(this, "向左手势", Toast.LENGTH_SHORT).show();

     } else if (e2.getX() - e1.getX() > verticalMinDistance && Math.abs(velocityX) > minVelocity) {

         // 切换Activity

         // Intent intent = new Intent(ViewSnsActivity.this, UpdateStatusActivity.class);

         // startActivity(intent);

         //Toast.makeText(this, "向右手势", Toast.LENGTH_SHORT).show();

         finish();

         overridePendingTransition(R.anim.push_right_in, R.anim.push_right_out);

     }

     return false;

 }

 @Override

 public void onLongPress(MotionEvent arg0) {

     // TODO Auto-generated method stub

 }

 @Override

 public boolean onScroll(MotionEvent arg0, MotionEvent arg1, float arg2,

         float arg3) {

     // TODO Auto-generated method stub

     return false;

 }

 @Override

 public void onShowPress(MotionEvent arg0) {

     // TODO Auto-generated method stub

 }

 @Override

 public boolean onSingleTapUp(MotionEvent arg0) {

     // TODO Auto-generated method stub

     return false;

 }

 @Override

 public boolean onTouch(View v, MotionEvent event) {

     // TODO Auto-generated method stub

     return mGestureDetector.onTouchEvent(event);

 }

 @Override

 public boolean onDown(MotionEvent arg0) {

     // TODO Auto-generated method stub

     return false;

 }

 @Override

 public boolean dispatchTouchEvent(MotionEvent ev) {

     mGestureDetector.onTouchEvent(ev);

     return super.dispatchTouchEvent(ev);

}