Xamarin Forms 2.0 AppCompat android keyboard mode - xamarin

Question

Xamarin I updated to version 4, Forms and 2.0 versions. On Android, I use AppCompat.
I had a problem. Previously, the Android keyboard caused resize view. Now this does not happen. The keyboard appears on the top view. And the desired Elements to be hiding.
I've tried:
[Activity(WindowSoftInputMode = SoftInput.AdjustResize, Label = "Title", Icon = "#drawable/icon", Theme = "#style/MyTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
global::Xamarin.Forms.Forms.Init(this, bundle);
ToolbarResource = Resource.Layout.toolbar;
TabLayoutResource = Resource.Layout.tabs;
LoadApplication(new App());
Window.DecorView.SetFitsSystemWindows(true);
}
}
Daylight AppCompat has been made on this lesson: https://blog.xamarin.com/material-design-for-your-xamarin-forms-android-apps/
Thank you.

Answer 1

I have solved the problem. Decompile class
"Forms AppCompatActivity" and watched how the method works OnCreate.
As a result, I turned out the following code:
[Activity(Label = "Title", Icon = "#drawable/icon", Theme = "#style/MyTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
global::Xamarin.Forms.Forms.Init(this, bundle);
Window.SetSoftInputMode(SoftInput.AdjustResize);
AndroidBug5497WorkaroundForXamarinAndroid.assistActivity(this);
ToolbarResource = Resource.Layout.toolbar;
TabLayoutResource = Resource.Layout.tabs;
LoadApplication(new App());
}
public class AndroidBug5497WorkaroundForXamarinAndroid
{
// For more information, see https://code.google.com/p/android/issues/detail?id=5497
// To use this class, simply invoke assistActivity() on an Activity that already has its content view set.
// CREDIT TO Joseph Johnson (http://stackoverflow.com/users/341631/joseph-johnson) for publishing the original Android solution on stackoverflow.com
public static void assistActivity(Activity activity)
{
new AndroidBug5497WorkaroundForXamarinAndroid(activity);
}
private Android.Views.View mChildOfContent;
private int usableHeightPrevious;
private FrameLayout.LayoutParams frameLayoutParams;
private AndroidBug5497WorkaroundForXamarinAndroid(Activity activity)
{
FrameLayout content = (FrameLayout)activity.FindViewById(Android.Resource.Id.Content);
mChildOfContent = content.GetChildAt(0);
ViewTreeObserver vto = mChildOfContent.ViewTreeObserver;
vto.GlobalLayout += (object sender, EventArgs e) => {
possiblyResizeChildOfContent();
};
frameLayoutParams = (FrameLayout.LayoutParams)mChildOfContent.LayoutParameters;
}
private void possiblyResizeChildOfContent()
{
int usableHeightNow = computeUsableHeight();
if (usableHeightNow != usableHeightPrevious)
{
int usableHeightSansKeyboard = mChildOfContent.RootView.Height;
int heightDifference = usableHeightSansKeyboard - usableHeightNow;
frameLayoutParams.Height = usableHeightSansKeyboard - heightDifference;
mChildOfContent.RequestLayout();
usableHeightPrevious = usableHeightNow;
}
}
private int computeUsableHeight()
{
Rect r = new Rect();
mChildOfContent.GetWindowVisibleDisplayFrame(r);
if (Build.VERSION.SdkInt < BuildVersionCodes.Lollipop)
{
return (r.Bottom - r.Top);
}
return r.Bottom;
}
}
}
It is important to add "Window.SetSoftInputMode(SoftInput.AdjustResize);" After calling base.OnCreate(bundle);