LOGV) Log.v(WindowManager, addView view + view) if ((params instanceof. I compared the API level 25 Toast class and others for the difference and I found an interesting thing there:įrom API 25, Android added a new param IBinder windowToken for Toast#handleShow(), and It brought an exception. Android example source code file: WindowManagerImpl.java (android. So now, after all, my research and analysis on BadTokenException, what I noticed about all the crashes there on Crashltyics: If returned the WindowManagerGlobal.ADD_BAD_APP_TOKEN, the exception occurs when the WMS.addWindow () function is called to check whether the window to be added is not in violation of the policy according to the android window policy. Return WindowManagerGlobal.ADD_BAD_APP_TOKEN This ensures secure interaction between the application and the window manager (by making it impossible to add windows on top of other applications), and also makes it easy for the activity manager to make direct requests to the window manager.Īnd the code that throws âBadTokenExceptionâ : The activity manager gives this token to both the (*application) and the window manager, and it sends the token to the window manager each time it wants to add a new window to the screen. When an application starts up for the first time, the ActivityManagerService creates a special kind of window token called an application window token, which uniquely identifies the applicationâs top-level container window. 1WindowManager 2LayoutParams 3ViewWindow I WindowManager AppApplicationApp. Without window tokens, this necessary identification step wouldnât be possible and the window manager wouldnât be able to protect itself from malicious applications. If the tokens donât match, the window manager rejects the request and throws a BadTokenException. Im at a bit of a loss, any ideas on how I not at all can get this textview to display my values Admins. The window manager protects against this by requiring applications to pass their applicationâs window token as part of each request to add or remove a window. Window tokens are important for security reasons because they make it impossible for malicious applications to draw on top of the windows of other applications. public void addView(View view, ViewGroup.LayoutParams params). Window Tokens:Īs the name suggest, a window token is a special type of Binder token used by window manager to uniquely identify a window in the system. In this page you can find the example usage for android.view WindowManager addView. If & GravityFlags.VerticalGravityMask) = 1.0f Ī(msg.WindowManagerService (WMS) is a system service that manages the windows on Android. Quickly bring your app to life with less code, using a modern declarative approach to UI, and the simplicity of Kotlin. If & GravityFlags.HorizontalGravityMask) = 1.0f WindowManagerFlags.NotFocusable | WindowManagerFlags.NotTouchable,Ī config = Gravity.GetAbsoluteGravity((GravityFlags.CenterHorizontal | GravityFlags.Bottom), = (int)TypedValue.ApplyDimension(ComplexUnitType.Dip, 64f, = I am creating custom toast messages similar to android Toast.MakeText().please see my c#.net below code chatheadImg (ImageView)chatheadView.findViewById (R.id.chatheadimg) Then make the service and add window manager to it. I am developing an android application using xamarin. Add image which you want to appear.
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