I need to avoid double splash screen issue in android- 12 API Xamarin forms-CodePudding

SplashActivity.cs

namespace Splash12.Droid { [Activity(Theme = "@style/MyTheme.Splash", MainLauncher = true, NoHistory = true)] public class SplashActivity : AppCompatActivity { static readonly string TAG = "X:" typeof(SplashActivity).Name;

    public override void OnCreate(Bundle savedInstanceState, PersistableBundle persistentState)
    {
        base.OnCreate(savedInstanceState, persistentState);
        Log.Debug(TAG, "SplashActivity.OnCreate");
    }

    // Launches the startup task
    protected override void OnResume()
    {
        base.OnResume();
        Task startupWork = new Task(() => { SimulateStartup(); });
        startupWork.Start();
    }

    // Simulates background work that happens behind the splash screen
    async void SimulateStartup()
    {
        Log.Debug(TAG, "Performing some startup work that takes a bit of time.");
        await Task.Delay(8000); // Simulate a bit of startup work.
        Log.Debug(TAG, "Startup work is finished - starting MainActivity.");
        StartActivity(new Intent(Application.Context, typeof(MainActivity)));
    }
}

}

MainActivity.cs

[Activity(Label = "Splash12", Theme = "@style/MainTheme", Icon = "@mipmap/icon", MainLauncher = false, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation | ConfigChanges.UiMode | ConfigChanges.ScreenLayout | ConfigChanges.SmallestScreenSize )]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
{
    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);

        Xamarin.Essentials.Platform.Init(this, savedInstanceState);
        global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
        LoadApplication(new App());
    }
    public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)
    {
        Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);

        base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
    }
}

}

styles.xml

<style name="MyTheme.Splash" parent ="Theme.AppCompat.Light.NoActionBar">
    <item name="android:windowBackground">@drawable/splash_screen</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowFullscreen">true</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:windowActionBar">true</item>
</style>

splash_screen.xml

CodePudding user response：

That is not the way to do a splash screen on Android 12.

Check out the example XamarinBasicSplashScreen at https://github.com/gmck/XamarinBasicSplashScreen.

For further documentation https://developer.android.com/develop/ui/views/launch/splash-screen/migrate

CodePudding user response：

In Android 12, it has its own splash screen and this is the Android way to provide a loading view for waiting the application to launch.

So, you add another splash screen cause the issue that you have two splash screens.

For solving the issue, you can add the code below to your style.xml.

<style name="MyTheme.Splash" parent ="Theme.AppCompat.Light.NoActionBar">
        <item name="android:windowBackground">@drawable/splash_screen</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowFullscreen">true</item>
        <item name="android:windowContentOverlay">@null</item>
        <item name="android:windowActionBar">true</item>

        <item name="android:windowIsTranslucent">true</item>
</style>

This code <item name="android:windowIsTranslucent">true</item> can make the splash screen of the Android 12 become transparent. So you can only see your splash screen instead.