Unable to add window android.view.ViewRoot$W@44da9bc0 -- permission denied for this window type

I have prefer this post for example but I got the error at adding viewgroup into the windowmanager object, I have used the same class for the Service as posted into the question with no change where I can mistake I didn't gettting it ``` WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE); wm.addView(mView, params); // here ``` when I add view to the WindowManger here is my manifest file ``` <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.searce.testoverlay" android:versionCode="1" android:versionName="1.0"> <uses-sdk android:minSdkVersion="7" /> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name="TestOverlayActivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <service android:enabled="true" android:name=".HUD"></service> </application> </manifest> ``` error ``` 09-27 18:49:23.561: ERROR/AndroidRuntime(653): Uncaught handler: thread main exiting due to uncaught exception 09-27 18:49:23.571: ERROR/AndroidRuntime(653): java.lang.RuntimeException: Unable to create service com.searce.testoverlay.HUD: android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRoot$W@44da9bc0 -- permission denied for this window type 09-27 18:49:23.571: ERROR/AndroidRuntime(653): at android.app.ActivityThread.handleCreateService(ActivityThread.java:2790) 09-27 18:49:23.571: ERROR/AndroidRuntime(653): at android.app.ActivityThread.access$3200(ActivityThread.java:119) 09-27 18:49:23.571: ERROR/AndroidRuntime(653): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1917) 09-27 18:49:23.571: ERROR/AndroidRuntime(653): at android.os.Handler.dispatchMessage(Handler.java:99) 09-27 18:49:23.571: ERROR/AndroidRuntime(653): at android.os.Looper.loop(Looper.java:123) 09-27 18:49:23.571: ERROR/AndroidRuntime(653): at android.app.ActivityThread.main(ActivityThread.java:4363) 09-27 18:49:23.571: ERROR/AndroidRuntime(653): at java.lang.reflect.Method.invokeNative(Native Method) 09-27 18:49:23.571: ERROR/AndroidRuntime(653): at java.lang.reflect.Method.invoke(Method.java:521) 09-27 18:49:23.571: ERROR/AndroidRuntime(653): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 09-27 18:49:23.571: ERROR/AndroidRuntime(653): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 09-27 18:49:23.571: ERROR/AndroidRuntime(653): at dalvik.system.NativeStart.main(Native Method) 09-27 18:49:23.571: ERROR/AndroidRuntime(653): Caused by: android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRoot$W@44da9bc0 -- permission denied for this window type 09-27 18:49:23.571: ERROR/AndroidRuntime(653): at android.view.ViewRoot.setView(ViewRoot.java:492) 09-27 18:49:23.571: ERROR/AndroidRuntime(653): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177) 09-27 18:49:23.571: ERROR/AndroidRuntime(653): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91) 09-27 18:49:23.571: ERROR/AndroidRuntime(653): at com.searce.testoverlay.HUD.onCreate(HUD.java:41) 09-27 18:49:23.571: ERROR/AndroidRuntime(653): at android.app.ActivityThread.handleCreateService(ActivityThread.java:2780) 09-27 18:49:23.571: ERROR/AndroidRuntime(653): ... 10 more ```