Programatically restart app on Android - MAUI

Question

Hi to all,

As per title I want to programatically restart the app and I am using the below code.
The problem is that it is not restarting the app, it is somehow closing it but it remains in background and it does not appear automatically I have to open all applications in background ( I see it ) and then I tap on it to reopen.
I need to restart the app, close and then reopen.
Thanks.

 public void RestartApp(string parameter)
 { 
     var activity = Platform.CurrentActivity;
     var packageManager = activity.PackageManager;
     var intent = packageManager.GetLaunchIntentForPackage(activity.PackageName);
     intent.AddFlags(ActivityFlags.ClearTop);
     intent.AddFlags(ActivityFlags.NewTask);
     var componentName = intent.Component;
     var mainIntent = Intent.MakeRestartActivityTask(componentName);
     var pendingIntent = PendingIntent.GetActivity(activity, 0, mainIntent, PendingIntentFlags.Immutable);
     var alarmManager = (AlarmManager)activity.GetSystemService(Context.AlarmService);
     alarmManager.Set(AlarmType.Rtc, Java.Lang.JavaSystem.CurrentTimeMillis() + 1000, pendingIntent);
     activity.FinishAffinity();
     Java.Lang.JavaSystem.Exit(0);
 }

Answer 1

Hello,

Firstly, please open your AndroidManifest.xml file and add following permissions in the <manifest>.

  <uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM" android:maxSdkVersion="32"/>
<uses-permission android:name="android.permission.USE_EXACT_ALARM" />

Then, you can use following code to restart your application.

#if ANDROID   
   var context = Platform.AppContext;
      PackageManager packageManager = context.PackageManager;
      Intent intent = packageManager.GetLaunchIntentForPackage(context.PackageName);
      ComponentName componentName = intent.Component;
      Intent mainIntent = Intent.MakeRestartActivityTask(componentName);
      mainIntent.SetPackage(context.PackageName);
      context.StartActivity(mainIntent);
      Runtime.GetRuntime().Exit(0);

#endif

And donot forget to add following namespace.

#if ANDROID
using Android.App;
using Android.Content;
using Android.Content.PM;
using Java.Lang;
#endif

As note: Please do not test this code in the debug mode, you can install application in the debug mode. Then stop the debug in VS. You can find your application in the emulator or device, open it manually and test this application restart code.

Best Regards,

Leon Lu

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