Android - Unable to add window android.view.ViewRootImpl$W@6518342 -- permission denied for window t

2020-08-11 09:26:20.931 25360-25360/com.zfw.screenshot E/WindowManager: BadTokenException or InvalidDisplayException, clean up.
2020-08-11 09:26:20.936 25360-25360/com.zfw.screenshot E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.zfw.screenshot, PID: 25360
    java.lang.RuntimeException: Unable to create service com.zfw.screenshot.service.FloatWindowsService: android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@942bdc -- permission denied for window type 2002
        at android.app.ActivityThread.handleCreateService(ActivityThread.java:3388)
        at android.app.ActivityThread.-wrap4(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1706)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:176)
        at android.app.ActivityThread.main(ActivityThread.java:6651)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:824)
     Caused by: android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@942bdc -- permission denied for window type 2002
        at android.view.ViewRootImpl.setView(ViewRootImpl.java:820)
        at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:356)
        at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:94)
        at com.zfw.screenshot.service.FloatWindowsService.createFloatView(FloatWindowsService.java:107)
        at com.zfw.screenshot.service.FloatWindowsService.onCreate(FloatWindowsService.java:68)
        at android.app.ActivityThread.handleCreateService(ActivityThread.java:3378)
        at android.app.ActivityThread.-wrap4(Unknown Source:0) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1706) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:176) 
        at android.app.ActivityThread.main(ActivityThread.java:6651) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:824)