add

Assets/3rd/NativeGallery/Android/NGPermissionCallbackAndroid.cs

@@ -0,0 +1,29 @@
+#if !UNITY_EDITOR && UNITY_ANDROID
+using System.Threading;
+using UnityEngine;
+
+namespace NativeGalleryNamespace
+{
+	public class NGPermissionCallbackAndroid : AndroidJavaProxy
+	{
+		private object threadLock;
+		public int Result { get; private set; }
+
+		public NGPermissionCallbackAndroid( object threadLock ) : base( "com.yasirkula.unity.NativeGalleryPermissionReceiver" )
+		{
+			Result = -1;
+			this.threadLock = threadLock;
+		}
+
+		public void OnPermissionResult( int result )
+		{
+			Result = result;
+
+			lock( threadLock )
+			{
+				Monitor.Pulse( threadLock );
+			}
+		}
+	}
+}
+#endif