Activity not attached to windows manager

Issue

I have a floating widget (that draws over all the apps) that on a long click will show a relative layout (remove_relativelayout) from the bottom of the screen that shows an x icon so that the user can drag the widget to remove it.

On most Samsung phones I get this crash:

Fatal Exception: java.lang.IllegalArgumentException: View=android.widget.RelativeLayout{762db5 G.E...... ......ID 0,0-160,160 #7f09022d app:id/remove_relativelayout} not attached to window manager
       at android.view.WindowManagerGlobal.findViewLocked(WindowManagerGlobal.java:569)
       at android.view.WindowManagerGlobal.updateViewLayout(WindowManagerGlobal.java:463)
       at android.view.WindowManagerImpl.updateViewLayout(WindowManagerImpl.java:101)
       at com.xxxx.dev.floatingwidget.services.FloatingWidgetServices.lambda$widgetLongClick$0(FloatingWidgetServices.java:20)
       at com.xxxxx.dev.floatingwidget.services.FloatingWidgetServices.lambda$widgetLongClick$0$FloatingWidgetServices(FloatingWidgetServices.java)
       at com.xxxxxx.dev.floatingwidget.services.-$$Lambda$FloatingWidgetServices$DhV3rKQxnQ9oEEnb70PNAJKR8NQ.onAnimationUpdate(-.java:4)
       at android.animation.ValueAnimator.animateValue(ValueAnimator.java:1558)
       at android.animation.ValueAnimator.animateBasedOnTime(ValueAnimator.java:1349)
       at android.animation.ValueAnimator.doAnimationFrame(ValueAnimator.java:1481)
       at android.animation.AnimationHandler.doAnimationFrame(AnimationHandler.java:146)
       at android.animation.AnimationHandler.access$100(AnimationHandler.java:37)
       at android.animation.AnimationHandler$1.doFrame(AnimationHandler.java:54)
       at android.view.Choreographer$CallbackRecord.run(Choreographer.java:994)
       at android.view.Choreographer.doCallbacks(Choreographer.java:794)
       at android.view.Choreographer.doFrame(Choreographer.java:725)
       at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:981)
       at android.os.Handler.handleCallback(Handler.java:883)
       at android.os.Handler.dispatchMessage(Handler.java:100)
       at android.os.Looper.loop(Looper.java:237)
       at android.app.ActivityThread.main(ActivityThread.java:7857)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1068)

Here is on start:

WindowManager.LayoutParams paramRemove = new WindowManager.LayoutParams(
                WindowManager.LayoutParams.WRAP_CONTENT,
                WindowManager.LayoutParams.WRAP_CONTENT,
                windowType,
                WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH |
                        WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,
                PixelFormat.TRANSLUCENT);
        paramRemove.gravity = Gravity.TOP | Gravity.LEFT;

        removeView.setVisibility(View.GONE);
        removeImg = removeView.findViewById(R.id.remove_img);

        windowManager.addView(removeView, paramRemove);

This is the "onLongClick" function I'm using:

private void widgetLongClick() {
        GlobalFunctions.printLn(">>>>>>>>>>>>Into FloatingWidgetService.chathead_longclick() ");

        WindowManager.LayoutParams param_remove = (WindowManager.LayoutParams) removeView.getLayoutParams();
        int x_cord_remove = (szWindow.x - removeView.getWidth()) / 2;
        int y_cord_remove = szWindow.y - (removeView.getHeight() + getStatusBarHeight());

        param_remove.x = x_cord_remove;
        param_remove.y = y_cord_remove;

        ValueAnimator va = ValueAnimator.ofFloat(szWindow.y, y_cord_remove);
        int mDuration = 100;
        if(removeView.isAttachedToWindow()){
            if(param_remove != null){
                if(windowManager !=null){
                    va.setDuration(mDuration);
                    va.addUpdateListener(animation -> {
                        param_remove.y = Math.round((Float) animation.getAnimatedValue());
                        windowManager.updateViewLayout(removeView, param_remove);
                    });
                    va.start();
                }
            }
        }
    }

Solution

I find the solution for my problem, the problem was that I'm closing the activity before the view is loaded, so what I did is to wait for 1 sec before closing the activity, using simply:

new Handler().postDelayed(new Runnable() {
    @Override
    public void run() {
        //close the activity after 1 sec 
    }
},1000);    

Answered By - chadi sfeir