Bugfix for freeze when requesting permissions on Android (Unity 2019)

JAR Source/RuntimePermissionsFragment.java

@@ -2,12 +2,14 @@
 
 import android.annotation.TargetApi;
 import android.app.Fragment;
+import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.os.Build;
 import android.os.Bundle;
 import android.util.Log;
 
 import java.util.ArrayList;
+import java.util.Random;
 
 /**
  * Created by yasirkula on 27.04.2018.
@@ -42,7 +44,8 @@ public void onCreate( Bundle savedInstanceState )
 		else
 		{
 			m_permissions = getArguments().getStringArray( PERMISSIONS );
-			requestPermissions( m_permissions, PERMISSIONS_REQUEST_CODE );
+			if( m_permissions != null )
+				requestPermissions( m_permissions, PERMISSIONS_REQUEST_CODE );
 		}
 	}
 
@@ -55,6 +58,8 @@ public void onRequestPermissionsResult( int requestCode, String[] permissions, i
 		if( permissionReceiver == null || m_permissions == null )
 		{
 			Log.e( "Unity", "Fragment data got reset while asking permissions!" );
+
+			getFragmentManager().beginTransaction().remove( this ).commit();
 			return;
 		}
 
@@ -101,5 +106,19 @@ else if( !shouldShowRequestPermissionRationale( permission ) )
 
 		permissionReceiver.OnPermissionResult( result );
 		getFragmentManager().beginTransaction().remove( this ).commit();
+
+		// Resolves a bug in Unity 2019 where the calling activity
+		// doesn't resume automatically after the fragment finishes
+		// Credit: https://stackoverflow.com/a/12409215/2373034
+		try
+		{
+			Intent resumeUnityActivity = new Intent( getActivity(), getActivity().getClass() );
+			resumeUnityActivity.setFlags( Intent.FLAG_ACTIVITY_REORDER_TO_FRONT );
+			getActivity().startActivityIfNeeded( resumeUnityActivity, 0 );
+		}
+		catch( Exception e )
+		{
+			Log.e( "Unity", "Exception (resume):", e );
+		}
 	}
-}
+}

Plugins/AndroidRuntimePermissions/README.txt

@@ -0,0 +1,23 @@
+= Android Runtime Permissions =
+
+Online documentation & example code available at: https://github.com/yasirkula/UnityAndroidRuntimePermissions
+E-mail: [email protected]
+
+1. ABOUT
+This plugin helps you query/request runtime permissions synchronously on Android M and later.
+
+2. HOW TO
+You can use the following static functions of AndroidRuntimePermissions to manage runtime permissions:
+
+- Permission CheckPermission( string permission ): checks whether or not the permission is granted. Permission is an enum that can take 3 values:
+-- Granted: permission is granted
+-- ShouldAsk: permission is not granted yet, but we can ask the user for permission via RequestPermission function. As long as the user doesn't select "Don't ask again" while denying the permission, ShouldAsk is returned
+-- Denied: we don't have permission and we can't ask the user for permission. In this case, user has to give the permission from app's Settings. This happens when user selects "Don't ask again" while denying the permission or when user is not allowed to give that permission (parental controls etc.)
+
+- Permission[] CheckPermissions( params string[] permissions ): queries multiple permissions simultaneously. The returned array will contain one Permission entry per each queried permission
+
+- Permission RequestPermission( string permission ): requests a permission from the user and returns the result. It is recommended to show a brief explanation before asking the permission so that user understands why the permission is needed and doesn't click Deny or worse, "Don't ask again"
+
+- Permission[] RequestPermissions( params string[] permissions ): requests multiple permissions simultaneously
+
+- void OpenSettings(): opens the settings for this app, from where the user can manually grant permission(s) in case a needed permission's state is Permission.Denied