Cannot find a way to request permission at runtime on android

Question

I am making an application for Android. I need to ask permission to record Audio at runtime because it is a dangerous permission. I followed the Android way, but I cannot find the function androidx.core.app.ActivityCompat.requestPermission : I only have the namespace AndroidX.Core.Graphics.

I also tried to follow this tutorial, I installed the mentioned nugget package, but I could not find the functions ContextCompat.CheckSelfPermission. I tried many possibilities but I never saw IntelliSense proposing it. What namespace should I include to get the functions of the nugget package ? Why I cannot find the functions I need inside the AndroidX namespace?

Answer 1

Hello,​

Welcome to our Microsoft Q&A platform!

If you want to use AndroidX package, you should migrate your application to AndroidX, please refer to the following doc step by step.

https://learn.microsoft.com/en-us/xamarin/android/platform/androidx

After that, please set the Target Framework to Android 10 or later like following screenshot.

Then you can get the AndroidX packages.

Another way to request permission. If you use Xamarin. I recommand you to use Xamarin.Essentials: Permissions. install Xamarin.Essentials nuget packages(If you did not install it).

Then Use following code in your activity.

   public class MainActivity : AppCompatActivity  
       {  
           public int REQUEST_LOCATION;  
           protected override void OnCreate(Bundle savedInstanceState)  
           {  
               base.OnCreate(savedInstanceState);  
               Xamarin.Essentials.Platform.Init(this, savedInstanceState);  
     
              
               CheckAndRequestMicrophonePermission();  
               // Set our view from the "main" layout resource  
               SetContentView(Resource.Layout.activity_main);  
           }  
     
           public async Task<PermissionStatus> CheckAndRequestMicrophonePermission()  
           {  
               var status = await Permissions.CheckStatusAsync<Permissions.Microphone>();  
     
               if (status == PermissionStatus.Granted)  
                   return status;  
     
                
     
               if (Permissions.ShouldShowRationale<Permissions.Microphone>())  
               {  
                   // Prompt the user with additional information as to why the permission is needed  
               }  
     
               status = await Permissions.RequestAsync<Permissions.Microphone>();  
     
               return status;  
           }  
     
           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);  
           }  
       }  
   }  

Best Regards,

Leon Lu

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