Android TV，如何更改headeritem的标题和颜色？

Question

我想更改标题颜色（Hello Android TV！）和行颜色的标题项（GridItemPresenter）。

Answer 1

要更改列表行标题样式，您必须使用自定义ListRowPresenter：

public class CustomListRowPresenter extends ListRowPresenter {
    public CustomListRowPresenter() {
        super();
        setHeaderPresenter(new CustomRowHeaderPresenter());
    }
}

public class CustomRowHeaderPresenter extends RowHeaderPresenter {
    @Override
    public Presenter.ViewHolder onCreateViewHolder(ViewGroup parent) {
        Presenter.ViewHolder viewHolder = super.onCreateViewHolder(parent);
        RowHeaderView rowHeaderView = (RowHeaderView) viewHolder.view;
        rowHeaderView.setTypeface(...);
        rowHeaderView.setTextSize(TypedValue.COMPLEX_UNIT_DIP, ...);
        return viewHolder;
    }
}

Haven没有使用BrowseFragment的任何直接经验，但我希望也有某种自定义演示者。

Answer 2

public class CustomListRowPresenter extends ListRowPresenter {
    public CustomListRowPresenter() {
        super();
        setHeaderPresenter(new CustomRowHeaderPresenter());
    }
}

class CustomRowHeaderPresenter extends RowHeaderPresenter {

    @Override
    public void onBindViewHolder(Presenter.ViewHolder viewHolder, Object item) {
        HeaderItem headerItem = item == null ? null : ((Row) item).getHeaderItem();
        RowHeaderPresenter.ViewHolder vh = (RowHeaderPresenter.ViewHolder) viewHolder;
        TextView title = vh.view.findViewById(R.id.row_header);
        if(!TextUtils.isEmpty(headerItem.getName())) {
            title.setText(headerItem.getName());
            title.setTextColor(ContextCompat.getColor(FiosTVApplication.getAppContext(),
                    R.color.white));
            title.setTypeface(ResourcesCompat.getFont(title.getContext(), R.font.nhaasgroteskdsstd_bold));
            title.setTextSize(TypedValue.COMPLEX_UNIT_SP,16);
        }
    }
}

Answer 3

设置标题文本颜色的另一种简单方法是覆盖xml中的leanback颜色：

<color name="lb_browse_header_color">#f00</color>

优点/缺点：它为所有标题设置颜色。