我创建了一个简单的录像机应用程序（典型的cameraapi和媒体录像机），它有一个可拖动的浮动视图，在我的例子中是一个按钮。
问题是，当它没有录制时，浮动按钮会以正确的方式跟随我的手指，但是如果我开始录制并尝试拖动按钮，视图会在我拖动它之前更改位置。就好像按钮从我的手指上跑开了，或者我的手指按下了触摸屏上的视图。
我的ontouchlistener类来自：https://stackoverflow.com/a/56920148/13196984 但只是用java转换的。我也试过这个，但还是一样的问题。https://stackoverflow.com/a/57957226/13196984

public class CustomTouchHelper implements View.OnTouchListener{
    private int screenWidth;
    private int screenHeight;

    private float dX = 0f;
    private float dY = 0f;

    public CustomTouchHelper(int screenWidth, int screenHeight) {
        this.screenWidth = screenWidth;
        this.screenHeight = screenHeight;
    }

    @Override
    public boolean onTouch(View view, MotionEvent motionEvent) {
            float newX;
            float newY;

            switch (motionEvent.getAction()){
                case MotionEvent.ACTION_DOWN:
                    initialX = view.getX();
                    initialY = view.getY();

                    dX = view.getX() - motionEvent.getRawX();
                    dY = view.getY() - motionEvent.getRawY();
                    System.out.println(" DOWN X " + view.getX());
                    System.out.println("DOWN Y " + view.getY());
                    break;
                case MotionEvent.ACTION_MOVE:
                    newX = motionEvent.getRawX() + dX;
                    newY = motionEvent.getRawY() + dY;
                    System.out.println(" MOVED X " + view.getX());
                    System.out.println("MOVED Y " + view.getY());

                    if((newX <= 0) || newX >= screenWidth - view.getWidth()
                            || (newY <= 0 ||
                            newY >= screenHeight
                                    - view.getHeight())){
                        return true;
                    }
                    view.animate().x(newX).y(newY).setDuration(0).start();
                    break;
                case ACTION_UP:
                    System.out.println(" UP X " + view.getX());
                    System.out.println("UP Y " + view.getY());
                    if((Math.abs(view.getX() - initialX) <=10)&& (Math.abs(view.getY() - initialY) <=10)){
                        view.performClick();
                    }

            }
            return true;
    }
}

我试着打印出touchlistener上的什么动作改变了视图位置，下面是我得到的
不录制时只需单击浮动按钮

2020-11-20 20:43:35.806 20552-20552/com.xxxx .xxxx I/System.out:  DOWN X 456.57724
2020-11-20 20:43:35.806 20552-20552/com.xxxx .xxxx I/System.out: DOWN Y 845.5596
2020-11-20 20:43:35.825 20552-20552/com.xxxx .xxxx I/System.out:  MOVED X 456.57724
2020-11-20 20:43:35.825 20552-20552/com.xxxx .xxxx I/System.out: MOVED Y 845.5596
2020-11-20 20:43:35.842 20552-20552/com.xxxx .xxxx I/System.out:  MOVED X 456.57724
2020-11-20 20:43:35.843 20552-20552/com.xxxx .xxxx I/System.out: MOVED Y 845.5596
2020-11-20 20:43:35.859 20552-20552/com.xxxx .xxxx I/System.out:  MOVED X 456.57724
2020-11-20 20:43:35.859 20552-20552/com.xxxx .xxxx I/System.out: MOVED Y 845.5596
2020-11-20 20:43:35.876 20552-20552/com.xxxx .xxxx I/System.out:  MOVED X 456.57724
2020-11-20 20:43:35.876 20552-20552/com.xxxx .xxxx I/System.out: MOVED Y 845.5596
2020-11-20 20:43:35.893 20552-20552/com.xxxx .xxxx I/System.out:  MOVED X 456.57724
2020-11-20 20:43:35.893 20552-20552/com.xxxx .xxxx I/System.out: MOVED Y 845.5596
2020-11-20 20:43:35.905 20552-20552/com.xxxx .xxxx I/System.out:  MOVED X 456.57724
2020-11-20 20:43:35.905 20552-20552/com.xxxx .xxxx I/System.out: MOVED Y 845.5596
2020-11-20 20:43:35.907 20552-20552/com.xxxx .xxxx I/System.out:  UP X 456.57724
2020-11-20 20:43:35.907 20552-20552/com.xxxx .xxxx I/System.out: UP Y 845.5596

在录制过程中单击一个简单的按钮

2020-11-20 20:46:24.113 20552-20552/com.xxxx.xxxxI/System.out:  DOWN X 456.57724
2020-11-20 20:46:24.113 20552-20552/com.xxxx.xxxxI/System.out: DOWN Y 845.5596
2020-11-20 20:46:24.115 20552-20552/com.xxxx.xxxxI/System.out:  MOVED X 456.57724
2020-11-20 20:46:24.115 20552-20552/com.xxxx.xxxxI/System.out: MOVED Y 845.5596
2020-11-20 20:46:24.126 20552-20552/com.xxxx.xxxxI/System.out:  MOVED X 456.57724
2020-11-20 20:46:24.127 20552-20552/com.xxxx.xxxxI/System.out: MOVED Y 845.5596 
2020-11-20 20:46:24.142 20552-20552/com.xxxx.xxxxI/System.out:  MOVED X 545.49493***X Changed
2020-11-20 20:46:24.142 20552-20552/com.xxxx.xxxxI/System.out: MOVED Y 921.52   ***Y Changed
2020-11-20 20:46:24.155 20552-20552/com.xxxx.xxxxI/System.out:  MOVED X 545.49493
2020-11-20 20:46:24.155 20552-20552/com.xxxx.xxxxI/System.out: MOVED Y 921.52
2020-11-20 20:46:24.157 20552-20552/com.xxxx.xxxxI/System.out:  UP X 545.49493
2020-11-20 20:46:24.157 20552-20552/com.xxxx.xxxxI/System.out: UP Y 921.52

希望你能帮我。：）