UnityFragment.java

public class UnityFragment extends Fragment {

    protected UnityPlayer mUnityPlayer;
    FrameLayout frameLayoutForUnity;

    public UnityFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        mUnityPlayer = new UnityPlayer(getActivity());
        View view = inflater.inflate(R.layout.fragment_unity, container, false);
        this.frameLayoutForUnity = (FrameLayout) view.findViewById(R.id.frameLayoutForUnity);
        this.frameLayoutForUnity.addView(mUnityPlayer.getView(),
                FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT);

        mUnityPlayer.requestFocus();
        mUnityPlayer.windowFocusChanged(true);
        return view;
    }

    @Override
    public void onDestroy() {
        mUnityPlayer.quit();
        super.onDestroy();
    }

    @Override
    public void onPause() {
        super.onPause();
        mUnityPlayer.pause();
    }

    @Override
    public void onResume() {
        super.onResume();
        mUnityPlayer.resume();
    }
}