Determining Keyboard Visibility Using SetOnApplyWindowInsetsListener

Question

Determining Keyboard Visibility Using SetOnApplyWindowInsetsListener

Nathan Sokalski 4,111

I have several elements which I need to modify when the keyboard is shown or hidden. If I understand correctly, this can be done in Android 11 using SetOnApplyWindowInsetsListener. However, I am having trouble figuring out how to do this (and none of the examples are in Xamarin.Android / C#). I have looked at the following sites:

https://proandroiddev.com/exploring-windowinsets-on-android-11-a80cf8fe19be
https://proandroiddev.com/android-11-creating-an-ime-keyboard-visibility-listener-c390a40d1ad0
https://developer.android.com/reference/android/view/View.html#setOnApplyWindowInsetsListener(android.view.View.OnApplyWindowInsetsListener)

How exactly do I create the IOnApplyWindowInsetsListener? Are there any good tutorials or examples of this in C# for Xamarin.Android? Thanks.

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 50,126 Microsoft External Staff

You could try the following way to create a class for implementing IOnApplyWindowInsetsListener:

   public class RootViewDeferringInsetsCallback : WindowInsetsAnimationCompat.Callback, IOnApplyWindowInsetsListener{  
   ......  
   }

Then, there are some methods you must implement which would be mentioned by VS:

   public override WindowInsetsCompat OnProgress(WindowInsetsCompat insets, IList<WindowInsetsAnimationCompat> runningAnimations){}  
     
           private View view;  
           private WindowInsetsCompat lastWindowInsets;  
           private bool deferredInsets = false;  
     
           public RootViewDeferringInsetsCallback(int dispatchMode) : base(dispatchMode)  
           {  
           }  
     
           public WindowInsetsCompat OnApplyWindowInsets(View v, WindowInsetsCompat insets)  
           {  
               view = v;  
               lastWindowInsets = insets;  
               return WindowInsetsCompat.Consumed;  
           }

Referring to the blog you mentioned, we could know that we could use the following code to get the state of keyboard:

   bool visible = false;  
   visible = insets.IsVisible(WindowInsetsCompat.Type.Ime());  
   if (visible == true){ // do something}

In Activity file, we could call it via:

   ViewCompat.SetOnApplyWindowInsetsListener(view, rootViewInsetsCallback);  
   ViewCompat.SetWindowInsetsAnimationCallback(view, rootViewInsetsCallback);

Do you think the above will be useful to you?

Your answer

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 50,126 Reputation points Microsoft External Staff

2022-08-01T09:08:17.87+00:00

You could try the following way to create a class for implementing IOnApplyWindowInsetsListener:

public class RootViewDeferringInsetsCallback : WindowInsetsAnimationCompat.Callback, IOnApplyWindowInsetsListener{ ...... }

Then, there are some methods you must implement which would be mentioned by VS:

public override WindowInsetsCompat OnProgress(WindowInsetsCompat insets, IList<WindowInsetsAnimationCompat> runningAnimations){} private View view; private WindowInsetsCompat lastWindowInsets; private bool deferredInsets = false; public RootViewDeferringInsetsCallback(int dispatchMode) : base(dispatchMode) { } public WindowInsetsCompat OnApplyWindowInsets(View v, WindowInsetsCompat insets) { view = v; lastWindowInsets = insets; return WindowInsetsCompat.Consumed; }

Referring to the blog you mentioned, we could know that we could use the following code to get the state of keyboard:

bool visible = false; visible = insets.IsVisible(WindowInsetsCompat.Type.Ime()); if (visible == true){ // do something}

In Activity file, we could call it via:

ViewCompat.SetOnApplyWindowInsetsListener(view, rootViewInsetsCallback); ViewCompat.SetWindowInsetsAnimationCallback(view, rootViewInsetsCallback);

Do you think the above will be useful to you?

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Determining Keyboard Visibility Using SetOnApplyWindowInsetsListener

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