@Override
 public void setContentView(View view, LayoutParams params) {
   if (requestDecorView(view, params, -1)) {
     mDecorView.removeAllViewsInLayout();
     mDecorView.addView(view, params);
   }
 }
  private boolean requestDecorView(View view, LayoutParams params, int layoutRes) {
    if (mDecorView != null) {
      return true;
    }
    mDecorView = new ActivityDecorView();
    mDecorView.setId(android.R.id.content);
    mDecorView.setProvider(this);
    if (view != null) {
      mDecorView.addView(view, params);
    } else if (layoutRes > 0) {
      getThemedLayoutInflater().inflate(layoutRes, mDecorView, true);
    }
    final LayoutParams p = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
    performAddonAction(
        new AddonCallback<IAddonActivity>() {
          @Override
          public boolean action(IAddonActivity addon) {
            return addon.installDecorView(mDecorView, p);
          }

          @Override
          public void justPost() {
            getWindow().setContentView(mDecorView, p);
          }
        });
    return false;
  }
 @Override
 public void addContentView(View view, LayoutParams params) {
   if (requestDecorView(view, params, -1)) {
     mDecorView.addView(view, params);
     onContentChanged();
   }
 }
 private boolean requestDecorView(View view, LayoutParams params, int layoutRes) {
   if (mDecorView != null) {
     return true;
   }
   mDecorView = new WindowDecorView(getContext());
   mDecorView.setId(android.R.id.content);
   mDecorView.setProvider(this);
   if (view != null) {
     mDecorView.addView(view, params);
   } else if (layoutRes > 0) {
     getLayoutInflater().inflate(layoutRes, mDecorView, true);
   }
   getWindow()
       .setContentView(
           mDecorView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
   return false;
 }