Google In-App Review for Unity not showing, not throwing errors

Question

We followed this guide (https://developer.android.com/guide/playcore/in-app-review/unity) to implement In-App Review for Unity Android.

We added google-play-core unity plugin and it should be imported correctly in Unity.

The code is:

private IEnumerator requireRate(){
    // Create instance of ReviewManager
    ReviewManager _reviewManager;
    // ...
    _reviewManager = new ReviewManager();
    var requestFlowOperation = _reviewManager.RequestReviewFlow();
    yield return requestFlowOperation;
    if (requestFlowOperation.Error != ReviewErrorCode.NoError)
    {
        // Log error. For example, using requestFlowOperation.Error.ToString().
        yield break;
    }
    PlayReviewInfo _playReviewInfo = requestFlowOperation.GetResult();
    var launchFlowOperation = _reviewManager.LaunchReviewFlow(_playReviewInfo);
    yield return launchFlowOperation;
    _playReviewInfo = null; // Reset the object
    if (launchFlowOperation.Error != ReviewErrorCode.NoError)
    {
        // Log error. For example, using requestFlowOperation.Error.ToString().
        yield break;
    }
    // The flow has finished. The API does not indicate whether the user
    // reviewed or not, or even whether the review dialog was shown. Thus, no
    // matter the result, we continue our app flow.
}

And we invoke the coroutine when we want to show it:

StartCoroutine(requireRate());

Any advice? Thanks

Answer 1

Simple request review.

using Google.Play.Review;
... 
public void RequestReview()
{
    // StartCoroutine(AndroidReview());
    var reviewManager = new ReviewManager();

    // start preloading the review prompt in the background
    var playReviewInfoAsyncOperation = reviewManager.RequestReviewFlow();

    // define a callback after the preloading is done
    playReviewInfoAsyncOperation.Completed += playReviewInfoAsync =>
    {
        if (playReviewInfoAsync.Error == ReviewErrorCode.NoError)
        {
            // display the review prompt
            var playReviewInfo = playReviewInfoAsync.GetResult();
            reviewManager.LaunchReviewFlow(playReviewInfo);
        }
        else
        {
            // handle error when loading review prompt
        }
    };
}

You only show dialog Review on Published or Internal Test. Make sure that google accounts that are logged in on your device are added to the tester lists.

Read more : https://developer.android.com/guide/playcore/in-app-review/test

Answer 2

//Require..
using Google.Play.Review;

public void requestFunction()
    {
        StartCoroutine(requireRate());
    }

//somewhere in your code after completing the game ..
requestFunction();

Package Manager installed: //Google Play In-app Review

testing on other devices, to my surprise on my account it didn’t work, the cause is not known, but I tested on 3 other devices from the list of the internal Google play console test program and very positive response.

Exactly as Vins says