How to transfer a parameter from an android application to a unity game on android?

I use Xamarin Form to create an android application.
My code is:

Code (CSharp):

1. Intent intent = Android.App.Application.Context.PackageManager.GetLaunchIntentForPackage("com.myapp.game_unity");
2. if (intent != null)
3. {
4.     intent.AddFlags(ActivityFlags.NewTask);
5.     intent.PutExtra("test_key", "test_val");
6.     Android.App.Application.Context.StartActivity(intent);
7. }
8. else
9. {
10.     intent = new Intent(Intent.ActionView);
11.     intent.AddFlags(ActivityFlags.NewTask);
12.     intent.SetData(Android.Net.Uri.Parse("market://details?id=com.myapp.game_unity"));
13.     intent.PutExtra("test_key", "test_val");
14.     Android.App.Application.Context.StartActivity(intent);
15. }

where I want to pass the parameter "test_val" to the game. The game starts, but I can’t get the parameter.

In the game, I try to get this parameter, but nothing works.
My code:

Code (CSharp):

1. var intent = new AndroidJavaClass("android.content.Intent");
2. var extras = intent.Call<AndroidJavaObject>("getExtras");
3. var val = extras.Call<string> ("getString", "test_key");

How can I pass the parameter with android app to the unity game (android)?

Unity version: 2019.3.0f6

 

Answer: https://answers.unity.com/questions/610587/call-unity-apk-with-intent-and-read-extras.html

Code (CSharp):

1. string arguments = "";
2.  
3. AndroidJavaClass UnityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
4. AndroidJavaObject currentActivity = UnityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
5.  
6. AndroidJavaObject intent = currentActivity.Call<AndroidJavaObject>("getIntent");
7. bool hasExtra = intent.Call<bool> ("hasExtra", "test_key");
8.  
9. if (hasExtra) {
10.     AndroidJavaObject extras = intent.Call<AndroidJavaObject> ("getExtras");
11.     arguments = extras.Call<string> ("getString", "test_key");
12. }
13.