Problems with Google Play Plugin for Unity

Well, it seems Google Play Android Plugin has a few issues.

If you call Application.Quit() after a Google Play authentication, the app freeze for about 5 seconds. Too bad! That an ANR to the face. There's an open issue on github. Fortunately, there's a little workaround.

After some thought, I came to a workaround that seems to alleviate the problem, although it doesn't solve the underlying problem.

This is the workaround:

1) Make a new Android plugin. In this plugin you are going to send the Unity activity to the background.

public class ActivityUtils 
{
    private Activity activity;

    public ActivityUtils(Activity activity) {
        this.activity = activity;
    }

    public void finish() {
        activity.runOnUiThread(new Runnable() {
            @Override
            public void run() 
            {
                activity.moveTaskToBack(true);
            }
        });
    }
}

2) From Unity Android, call the finish() instead of Application.Quit().

public class MyApplication
{
    public static void QuitApplication()
    {
#if UNITY_ANDROID
        AndroidJavaClass playerClass = 
            new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        AndroidJavaObject activity = 
            playerClass.GetStatic<AndroidJavaObject>("currentActivity");

        AndroidJavaObject activityUtils = 
            new AndroidJavaObject("com.google.unity.ActivityUtils", activity);
        activityUtils.Call ("finish");
#else
        Application.Quit();
#endif
    }
}