Why does the app randomly crash?

[WooyoungKang]

No description provided.

[WooyoungKang]

This is the logcat

2019-01-29 13:38:03.003 6020-6020/com.example.chatheads E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.chatheads, PID: 6020
java.lang.RuntimeException: Unable to create service com.example.chatheads.ChatHeadService: android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@bac7f01 -- permission denied for window type 2002
at android.app.ActivityThread.handleCreateService(ActivityThread.java:3554)
at android.app.ActivityThread.-wrap4(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1786)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6944)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
Caused by: android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@bac7f01 -- permission denied for window type 2002
at android.view.ViewRootImpl.setView(ViewRootImpl.java:982)
at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:381)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:100)
at com.example.chatheads.ChatHeadService.onCreate(ChatHeadService.java:48)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:3544)
at android.app.ActivityThread.-wrap4(Unknown Source:0) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1786) 
at android.os.Handler.dispatchMessage(Handler.java:105) 
at android.os.Looper.loop(Looper.java:164) 
at android.app.ActivityThread.main(ActivityThread.java:6944) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374) 

[Ideasandkanishk]

It is crashing above version 26.
You have to just implement this
if (Build.VERSION.SDK_INT >= 26) {
params= new WindowManager.LayoutParams(
WindowManager.LayoutParams.WRAP_CONTENT,
WindowManager.LayoutParams.WRAP_CONTENT,
WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
PixelFormat.TRANSLUCENT
);
}
and for below it will work same.

Happy coding.

[mksantoki]

@Ideasandkanishk Yes working perfect. Thank you :)