how to write this code in maui android?

Question

final MediaProjectionManager mediaProjectionManager =  getSystemService(MediaProjectionManager.class);
final MediaProjection[] mediaProjection = new MediaProjection[1];
ActivityResultLauncher<Intent> startMediaProjection = registerForActivityResult(  new StartActivityForResult(),  result -> {    if (result.getResultCode() == Activity.RESULT_OK) {
      mediaProjection[0] = mediaProjectionManager.getMediaProjection(result.getResultCode(), result.getData());    }  });

how to write this in maui?

I use RegisterForActivityResult but the callback method not run. why?

the RegisterForActivityResult code is run but the callback not .

Answer 1

Hello,

Please invoke above code in the MainActivity.cs. I used following code and created MyActivityCallback.cs, OnActivityResult method will be executed.

using Android.App;
using Android.Content;
using Android.Content.PM;
using Android.Media.Projection;
using Android.OS;
using AndroidX.Activity.Result;
using static AndroidX.Activity.Result.Contract.ActivityResultContracts;


namespace MauiApp1
{
    [Activity(Theme = "@style/Maui.SplashTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation | ConfigChanges.UiMode | ConfigChanges.ScreenLayout | ConfigChanges.SmallestScreenSize | ConfigChanges.Density)]
    public class MainActivity : MauiAppCompatActivity
    {
        private MediaProjectionManager mediaProjectionManager;
        private MediaProjection mediaProjection;
       protected override void OnCreate(Bundle? savedInstanceState)
        {
            base.OnCreate(savedInstanceState);


           Activity CurrentActivity = Microsoft.Maui.ApplicationModel.Platform.CurrentActivity;
           // Initialize MediaProjectionManager
            mediaProjectionManager = (MediaProjectionManager)GetSystemService(Context.MediaProjectionService);
           // Register for activity result
            var startMediaProjection = RegisterForActivityResult(new StartActivityForResult(), new MyActivityCallback(mediaProjectionManager));
           // Start the media projection activity
            Intent mediaProjectionIntent = mediaProjectionManager.CreateScreenCaptureIntent();
            startMediaProjection.Launch(mediaProjectionIntent);
        }
       protected override void OnActivityResult(int requestCode, Result resultCode, Intent? data)
        {
            base.OnActivityResult(requestCode, resultCode, data);
        }
    }


   internal class MyActivityCallback : Java.Lang.Object, IActivityResultCallback
    {
        private MediaProjectionManager? mediaProjectionManager;


       public MyActivityCallback(MediaProjectionManager? mediaProjectionManager)
        {
            this.mediaProjectionManager = mediaProjectionManager;
        }
       public void OnActivityResult(Java.Lang.Object? result)
        {
            ActivityResult activityResult= result as ActivityResult;
            if (activityResult.ResultCode == -1) {
               MediaProjection mediaProjection = mediaProjectionManager.GetMediaProjection(activityResult.ResultCode, activityResult.Data);
            }
        }
    }
}

Best Regards,

Leon Lu

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