如何更改 xamarin.android 中默认显示警报的背景颜色? [英] How to change Background Color of Default Display alert in xamarin.android?

问题描述

我想更改显示警报的默认背景颜色，我在不同的网站上尝试了很多问题有人可以帮我吗?

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

推荐答案

如果不想使用Rg.Plugins.Popup，在android中，可以用来实现AlertDialog 和自定义样式.您可以通过 DependencyService 调用它.

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();
        }
    }
}

将以下样式添加到 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>

在 PCL 中调用它.

Call it in the PCL.

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

这里正在运行 GIF.

Here is running GIF.

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