android - ViewPager 类似于 AndroidTV 中 BrowseFragment 中的东西

Question

我是 Android TV 的新手。请查看下面的图片。

这张图片的上方有一个轮播图，所有红色标记的区域都是图片。

我想在 Android TV 中制作这个屏幕。我为此使用了 BrowseFragment。我使用了两个 Presenter，一个用于第一行，另一个用于另一行。

我用过的代码:

HomeFragment.java

    private  CustomListRowPresenter mListRowPresenter;
    private void loadRows() {
        List<Movie> list = MovieList.setupMovies();
        mListRowPresenter = new CustomListRowPresenter(getActivity(),this);
        mRowsAdapter = new ArrayObjectAdapter(mListRowPresenter);
        CardPresenter cardPresenter = new CardPresenter(getActivity());

        mNumberOfRows = NUM_ROWS;
        HeaderItem gridHeader = new HeaderItem(0, "");
        GridItemPresenter mGridPresenter = new GridItemPresenter();
        ArrayObjectAdapter gridRowAdapter = new ArrayObjectAdapter(mGridPresenter);
        gridRowAdapter.add(getResources().getString(R.string.grid_view));
        gridRowAdapter.add(getString(R.string.error_fragment));
        gridRowAdapter.add(getResources().getString(R.string.personal_settings));
        mRowsAdapter.add(new ListRow(gridHeader, gridRowAdapter));

        int i;
        for (i = 1; i < NUM_ROWS; i++) {
            if (i != 0) {
                Collections.shuffle(list);
            }
            ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter(cardPresenter);
            for (int j = 1; j < NUM_COLS; j++) {
                listRowAdapter.add(list.get(j % 5));
            }
            HeaderItem header = new HeaderItem(i, MovieList.MOVIE_CATEGORY[i]);
            mRowsAdapter.add(new ListRow(header, listRowAdapter));
        }



        setAdapter(mRowsAdapter);

    }

CardPresenter.java

public class CardPresenter extends Presenter {
    private static final String TAG = "CardPresenter";

    private static int CARD_WIDTH = 360;
    private static int CARD_HEIGHT = 160;
    private static int sSelectedBackgroundColor;
    private static int sDefaultBackgroundColor;
    private Drawable mDefaultCardImage;
    private Activity mActivity;

    public CardPresenter(Activity activity){
        mActivity = activity;
    }

    public CardPresenter(){
     }
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent) {
        Log.d(TAG, "onCreateViewHolder");

        sDefaultBackgroundColor = parent.getResources().getColor(R.color.default_background);
        sSelectedBackgroundColor = parent.getResources().getColor(R.color.selected_background);
        mDefaultCardImage = parent.getResources().getDrawable(R.drawable.movie);
/*
        ImageCardView cardView = new ImageCardView(parent.getContext()) {
            @Override
            public void setSelected(boolean selected) {
                updateCardBackgroundColor(this, selected);
                super.setSelected(selected);
            }
        };

        cardView.setFocusable(true);
        cardView.setFocusableInTouchMode(true);
        cardView
                .setBackgroundResource(R.drawable.gridview_cell_border);
        updateCardBackgroundColor(cardView, false);*/

        View view = mActivity.getLayoutInflater().inflate(R.layout.gridview_cell_rows, parent,
                false);
        LinearLayout linearLayout = (LinearLayout)view.findViewById(R.id.container_grid_view_item);
        linearLayout.setBackgroundResource(R.drawable.gridview_cell_border);

        view.setFocusable(true);

        ViewHolder viewHolder = new ViewHolder(view);
        return viewHolder;

     }

    private static void updateCardBackgroundColor(ImageCardView view, boolean selected) {
        int color = selected ? sSelectedBackgroundColor : sDefaultBackgroundColor;
        // Both background colors should be set because the view's background is temporarily visible
        // during animations.
        view.setBackgroundColor(color);
        view.findViewById(R.id.info_field).setBackgroundColor(color);
    }

    @Override
    public void onBindViewHolder(Presenter.ViewHolder viewHolder, Object item) {
        Movie movie = (Movie) item;
        View cardView = (View) viewHolder.view;
        ImageView imageView = (ImageView)cardView.findViewById(R.id.imageView);
        LinearLayout linearLayout = (LinearLayout)cardView.findViewById(R.id.container_grid_view_item);
        linearLayout.setBackgroundResource(R.drawable.gridview_cell_border);
        Log.d(TAG, "onBindViewHolder");
        if (movie.getCardImageUrl() != null) {
           /* cardView.setTitleText(movie.getTitle());
            cardView.setContentText(movie.getStudio());
            cardView.setMainImageDimensions(CARD_WIDTH, CARD_HEIGHT);*/
            Glide.with(viewHolder.view.getContext())
                    .load(movie.getCardImageUrl())
                    .centerCrop()
                    .error(mDefaultCardImage)
                    .into(imageView);
        }


    }

    @Override
    public void onUnbindViewHolder(Presenter.ViewHolder viewHolder) {
        Log.d(TAG, "onUnbindViewHolder");
        View cardView = (View) viewHolder.view;
        // Remove references to images so that the garbage collector can free up memory

    }

所以对于第一行，我使用了 CardPresenter，对于其他行，我使用了 GridPresenter。

我的要求是这种 viewpager 类型的东西应该每 5 秒自动旋转一次。

所以请帮我设计这个 fragment 。

Answer 1

如 Creating a Catalog Browser 中所述，如果您希望自定义 fragment 之间的标题 View ，请使用 Presenter 并实现创建、绑定(bind)和取消绑定(bind) View 持有者的抽象方法。在BrowseFragment显示目录浏览器的实现，使用 setHeaderPresenterSelector() 方法设置行标题的呈现器或 setOnItemViewSelectedListener() 方法设置项目选择监听器，如中所示下面的例子。

setHeaderPresenterSelector(new PresenterSelector() {
    @Override
    public Presenter getPresenter(Object o) {
        return new IconHeaderItemPresenter();
    }
});

然后，使用 Timer 设置每个页面呈现器的持续时间，如本 GitHub post 所示.

对于示例代码实现，此 tutorial也可能有帮助。