Xamarin Android WindowSoftInput Resize (specific page) - xamarin

Question

Is there a way to implement the Android.Views.SoftInput.AdjustResize to a specific page/control (e.g. a grid) rather than inserting it into App.xaml.cs or MainActivity.cs ?Since it is affecting my other pages when the keyboard is being shown.
Thanks!

Answer 1

I have solved my problem. What I did was to implement in on my page.xaml.cs on
protected override void OnAppearing()
{
base.OnAppearing();
App.Current.On<Android>().UseWindowSoftInputModeAdjust(WindowSoftInputModeAdjust.Resize);
}
This would resize your window when the keyboard is being shown when the page appears, and if you want to retain the normal behaviour of your Entry or other elements that will show your keyboard use this code:
protected override void OnDisappearing()
{
base.OnDisappearing();
App.Current.On<Android>().UseWindowSoftInputModeAdjust(WindowSoftInputModeAdjust.Pan);
}
The WindowSoftInputModeAdjust.Pan is the default behaviour of Android when a keyboard is being shown. This way when your page disappears, the settings will go back to default.

Answer 2

As supplement to #jbtamares' solution, I created an extension method which allows to easily revert to the original resize mode once the affected page disappears.
The extension method tracks the original resize modes once UseWindowSoftInputModeAdjust is called on the page. ResetWindowSoftInputModeAdjust reads the original resize mode and sets it accordingly.
This is the code of the extension method:
public static class PageExtensions
{
private static readonly IDictionary<Type, WindowSoftInputModeAdjust> OriginalWindowSoftInputModeAdjusts = new Dictionary<Type, WindowSoftInputModeAdjust>();
public static void UseWindowSoftInputModeAdjust(this Page page, WindowSoftInputModeAdjust windowSoftInputModeAdjust)
{
var platformElementConfiguration = Xamarin.Forms.Application.Current.On<Android>();
var pageType = page.GetType();
if (!OriginalWindowSoftInputModeAdjusts.ContainsKey(pageType))
{
var originalWindowSoftInputModeAdjust = platformElementConfiguration.GetWindowSoftInputModeAdjust();
OriginalWindowSoftInputModeAdjusts.Add(pageType, originalWindowSoftInputModeAdjust);
}
platformElementConfiguration.UseWindowSoftInputModeAdjust(windowSoftInputModeAdjust);
}
public static void ResetWindowSoftInputModeAdjust(this Page page)
{
var pageType = page.GetType();
if (OriginalWindowSoftInputModeAdjusts.TryGetValue(pageType, out var originalWindowSoftInputModeAdjust))
{
OriginalWindowSoftInputModeAdjusts.Remove(pageType);
var platformElementConfiguration = Xamarin.Forms.Application.Current.On<Android>();
platformElementConfiguration.UseWindowSoftInputModeAdjust(originalWindowSoftInputModeAdjust);
}
}
}
And here is how you apply it in the page:
public partial class LoginPage : ContentPage
{
public LoginPage()
{
InitializeComponent();
}
protected override void OnAppearing()
{
base.OnAppearing();
this.UseWindowSoftInputModeAdjust(WindowSoftInputModeAdjust.Resize);
}
protected override void OnDisappearing()
{
base.OnDisappearing();
this.ResetWindowSoftInputModeAdjust();
}
}
Hope this helps. Let me know if you find any problems with the code posted above.