为activity添加左右手势识别

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);
}