Integrate Unity3d view into Android activity

Question

I\'m currently working on a small AR app for Android and am facing the problem of integrating Unity3d into an activity. The requirements indicate that I need to be able to p

Answer 1

While I still don't know why it works like that, I've found a way of fixing it.

Instead of simply using setContentView() in onCreate(), extend onResume() and in that method recursively look through all the available views to find the parent view of the UnityPlayer object. Once that's found, layouts and other views can be inflated and added to that parent view.

Here's the link with a code example - I've used this to make my app work: https://developer.vuforia.com/resources/dev-guide/extending-unity-android-activity-and-adding-custom-views-eclipse

Edit: Here's a code snippet showing my solution.

@Override
public void onResume() {

    super.onResume();

    if (unityPlayer == null) {

        View rootView = findViewById(android.R.id.content);
        unityPlayer = findUnityPlayerView(rootView);

        if (unityPlayer != null) {

            ViewGroup unityPlayerParentView = (ViewGroup)(unityPlayer.getParent());

            View mainHomeView = getLayoutInflater().inflate(R.layout.activity_main, null);
            LayoutParams layoutParams = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
            unityPlayerParentView.addView(mainHomeView, layoutParams);

        }
    }
}

and

private UnityPlayer findUnityPlayerView(View view) {

    if (view instanceof UnityPlayer) {

        return (UnityPlayer) view;
    }
    if (view instanceof ViewGroup) {

        ViewGroup childrenViews = (ViewGroup) view;

        for (int i = 0; i < childrenViews.getChildCount(); i++) {

            UnityPlayer foundView = findUnityPlayerView(childrenViews.getChildAt(i));

            if (foundView != null) {

                return foundView;
            }
        }
    }

    return null;
}