How to change Background Color of Default Display alert in xamarin.android?

Question

I want to change default background color of display alert,I have tried many questions in different sites Can anyone help me ?

Answer 1

If you do not want to use Rg.Plugins.Popup, In the android, you can achieve it with a AlertDialog and custom style.You can call it by DependencyService.

[assembly: Dependency(typeof(DeviceOpenAlertService))]
namespace App2.Droid
{
    class DeviceOpenAlertService : IDeviceOpenAlertService
    {
        public void Open()
        {

            var alert = new AlertDialog
                 .Builder(CrossCurrentActivity.Current.Activity, Resource.Style.MyDialogStyle)
                 .SetTitle("Alert Title")
                 .SetMessage("Do you want to close this application")
                 .SetPositiveButton("Yes", new myButtonClicklistener())
                 .SetNegativeButton("No", new myButtonClicklistener())
                 .Create();

            alert.Show();
        }
    }
}

Add following style to the styles.xml

 <style name="MyDialogStyle" parent="android:Theme.Material.Light.Dialog.NoActionBar">
    <!--Dialog Background Color-->
    <item name="android:colorBackground">#FF0000</item>

  </style>

  <style name="MyButtonsStyle" parent="Widget.AppCompat.Button.ButtonBar.AlertDialog">
    <!-- text color for the button -->
    <item name="android:textColor">#00ff00</item>
  </style>

Call it in the PCL.

 DependencyService.Get<IDeviceOpenAlertService>().Open();

Here is running GIF.