Let's also create a temporary declaration of the native function to pass the data from Java to the native side of application once we start working in the game engines. Let's then create variables to store a callback object as well as WindowInfoTrackerCallbackAdapter and WindowMetricsCalculator. WindowManagerBadTokenException: Unable to add window - token null is not valid is your activity running at (ViewRoot.java). Start by creating a class, FoldableHelper, that is going to contain all of our helper functions. Import .WindowInfoTrackerCallbackAdapter Next, let's import all the necessary libraries and classes in this file: //Android Imports The simplest way to show a window on another display is to create a Presentation. Let's start off by giving it a package name of package .foldable Set up the FoldableHelper class and data storage classĬreate a file called FoldableHelper.java in Visual Studio or any source code editor. Creating the Android Jetpack WindowManager setupĪs previously mentioned, we are creating a Java file that can be imported into either Unity or Unreal Engine 4, to create an interface for retrieving information on the folding feature and pass it over to the native or engine side of your applications. According to its documentation, future versions will be extended to more display types and window features. The library had its 1.0.0 release in January 2022 for targeted foldable devices. WindowManager is one of these libraries, and is intended to help application developers support new device form factors and multi-window environments. Android Jetpack WindowManagerĪndroid Jetpack, in their own words, is "a suite of libraries to help developers follow best practices, reduce boilerplate code, and write code that works consistently across Android versions and devices so that developers can focus on the code they care about." Many programs don't remember their position and size between sessions and even Windows Explorer does not restore windows to their last position under Windows 7 or higher. This creates an interface allowing developers to retrieve information about the folding feature on the device.Īt the end of this blog, you can go deeper in learning by going to Code Lab. Download Purchase WindowManager WindowManager helps you to improve your work flow by remembering and restoring the position and size of your programs and windows. We focus on creating a Java file containing an implementation of the Android Jetpack WindowManager library that can be imported into game engines like Unity or Unreal Engine. In this blog, you can get started on how to utilize these foldable features on Android game apps. So, here we can only use the activity's this.Ībout Progressdialog.show throw the increasing popularity of foldable phones such as the Galaxy Z Fold3 and Galaxy Z Flip3, apps on these devices are adopting its foldable features. WindowManager is the portal to access Windows. For example, to display a floating Window on the desktop, you need to use Window to achieve. It belongs to an activity, it is destroyed when the activity is destroyed, it will not exist again, but if you pass in This.getapplicationcontext (), it means that its life cycle is the entire application, which clearly exceeds its life cycle. preface A Window is the concept of a Window, which is the carrier of all views, whether it is an Activity, Dialog, or Toast, whose views are attached to the Window. So, here comes a life cycle problem, This.getapplicationcontext () takes the context of this application, Activity.this takes the context of the activity, the life cycle of the two is different, the former life cycle is the whole application, the latter life cycle is only its activity. The ProgressDialog object is dependent on a view, and the view is corresponding to an activity. Workaround: Change Getapplicationcontext () in the parameter to xxactivity.this OK : Unable to add window - token android.os.BinderProxy40b47bd8 is not valid is your activity running at. You must use activity because there is only one activity to add a form The cause of the exception is this getapplicationcontext (), Although the parameters here are also to get a context, but cannot use Getapplicationcontext () to get the context. I am using this method to implement the progress dialog box: Prodialog = Progressdialog.show (Getapplicationcontext (), "Sadfs", "dddddd", true) Afternoon fiddling with the progressdialog, entering on the wrong: $badtokenexception:unable to add window-token null was not a for an AP Plication, let me be baffled.
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