Fixed main thread dispatcher (not used at the moment)

Plugins/AndroidRuntimePermissions/Android/PermissionCallbackAsync.cs

@@ -5,30 +5,35 @@ namespace AndroidRuntimePermissionsNamespace
 {
 	public class PermissionCallbackAsync : AndroidJavaProxy
 	{
-		private string result;
-		private string[] permissions;
+		private readonly string[] permissions;
 		private AndroidRuntimePermissions.PermissionResultMultiple callback;
+		private readonly PermissionCallbackHelper callbackHelper;
 
 		public PermissionCallbackAsync( string[] permissions, AndroidRuntimePermissions.PermissionResultMultiple callback ) : base( "com.yasirkula.unity.RuntimePermissionsReceiver" )
 		{
-			result = null;
-
 			this.permissions = permissions;
 			this.callback = callback;
+			callbackHelper = new GameObject( "PermissionCallbackHelper" ).AddComponent<PermissionCallbackHelper>();
 		}
 
 		public void OnPermissionResult( string result )
 		{
-			this.result = result;
-			MainThreadDispatcher.ExecuteOnMainThread( ExecuteCallback );
+			callbackHelper.CallOnMainThread( () => ExecuteCallback( result ) );
 		}
 
-		private void ExecuteCallback()
+		private void ExecuteCallback( string result )
 		{
-			if( callback != null )
+			try
+			{
+				if( callback != null )
+				{
+					callback( permissions, AndroidRuntimePermissions.ProcessPermissionRequest( permissions, result ) );
+					callback = null;
+				}
+			}
+			finally
 			{
-				callback( permissions, AndroidRuntimePermissions.ProcessPermissionRequest( permissions, result ) );
-				callback = null;
+				Object.Destroy( callbackHelper );
 			}
 		}
 	}

Plugins/AndroidRuntimePermissions/Android/PermissionCallbackHelper.cs

@@ -0,0 +1,31 @@
+#if !UNITY_EDITOR && UNITY_ANDROID
+using UnityEngine;
+
+namespace AndroidRuntimePermissionsNamespace
+{
+	public class PermissionCallbackHelper : MonoBehaviour
+	{
+		private System.Action mainThreadAction = null;
+
+		private void Awake()
+		{
+			DontDestroyOnLoad( gameObject );
+		}
+
+		private void Update()
+		{
+			if( mainThreadAction != null )
+			{
+				System.Action temp = mainThreadAction;
+				mainThreadAction = null;
+				temp();
+			}
+		}
+
+		public void CallOnMainThread( System.Action function )
+		{
+			mainThreadAction = function;
+		}
+	}
+}
+#endif