Java android-覆盖服务移动视图

我正在尝试创建一个始终处于运行状态的俯视图，并将图像放入其中。。。。 代码运行时没有任何错误

问题出在btn1TouchListener上，当用户触摸按钮ImageView时，ImageView会随之移动，但ImageView会先跳到屏幕的末端，然后开始在屏幕上移动，并且图像视图当前不会移动到用户触摸的位置。 IamgeView集合的Y没有任何问题，但X当前不适合

这是我的密码：

public class OverlayService extends Service {

LinearLayout lView;
TouchImageView oView;    //My Custom Image View
WindowManager wm;
Button btn1;
WindowManager.LayoutParams params;
Bitmap a;

@Override
public IBinder onBind(Intent i) {
    return null;
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    sendNotification();

    isRun=true;

    //Get A Bitmap For Imageview
    clashbaz.irana.ir.clashbaz.Bitmap mbit = new clashbaz.irana.ir.clashbaz.Bitmap();

    a = mbit.imageFromAsset(intent.getStringExtra("data"),getApplicationContext());

    oView.viewHeight = a.getHeight();
    oView.viewWidth = a.getWidth();

    lView.addView(btn1);
    lView.addView(oView);

    params = new WindowManager.LayoutParams(
            ViewGroup.LayoutParams.WRAP_CONTENT,
            ViewGroup.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.TYPE_PHONE,
            WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
            | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
            PixelFormat.TRANSLUCENT);

    wm = (WindowManager) getSystemService(WINDOW_SERVICE);

    params.gravity = Gravity.START | Gravity.LEFT;
    wm.addView(lView, params);
    oView.setImageDrawable(new BitmapDrawable(a)); // Image Resource
    wm.updateViewLayout(lView, params);
    return START_STICKY;
}

@Override
public void onCreate() {
    super.onCreate();
    lView = new LinearLayout(this);
    lView.setOrientation(LinearLayout.VERTICAL);

    oView = new TouchImageView(this);
    oView.isFocusable();
    btn1 = new Button(this);
    btn1.setText("Move");
    btn1.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent e) {
            if (e.getAction() == MotionEvent.ACTION_MOVE) {
                params.x = (int) e.getRawX();
                params.y = (int) e.getRawY();
                wm.updateViewLayout(lView, params);
            }
            return false;
        }
    });

}

第一次触摸视图时：

当我移动视图时：

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最后，我找到了詹姆斯所说的答案

只需添加

Gravity.TOP | Gravity.LEFT

而不是

Gravity.START | Gravity.LEFT