How to use

getTheme

method

in

android.app.ActivityGroup

@Override
public Theme getTheme() {
  boolean installed = ProxyEnvironment.hasInstance(mTargetPackageName);
  if (installed) {
    if (mTargetTheme == null) {
      mTargetTheme = ProxyEnvironment.getInstance(mTargetPackageName).getTargetResources().newTheme();
      mTargetTheme.setTo(ProxyEnvironment.getInstance(mTargetPackageName).getTargetTheme());
    }
    return mTargetTheme;
  } else {
    return super.getTheme();
  }
}