Android TV的倾斜：取消设置视频标题会增加行间距

的PlaybackOverlayFragment使用PlaybackControlsGlue根据数据模型设置播放控件。这是使用标准胶水时的外观：

我的问题是，我不希望标题/副标题文本出现在主播放器控件栏上方-我们希望它们出现在播放器屏幕的左上角。因此，为了禁用标题/副标题的显示，我覆盖了glue的

createControlsRowAndPresenter（）

，而是使用PlaybackControlsRowPresenter的空args构造函数：

@Override
public PlaybackControlsRowPresenter createControlsRowAndPresenter() {
    PlaybackControlsRow controlsRow = new PlaybackControlsRow(this);
    setControlsRow(controlsRow);
    final View.OnKeyListener onKeyListener = this;
    PlaybackControlsRowPresenter presenter = new PlaybackControlsRowPresenter() { // no AbstractDetailsDescriptionPresenter argument
        @Override
        protected void onBindRowViewHolder(RowPresenter.ViewHolder vh, Object item) {
            super.onBindRowViewHolder(vh, item);
            vh.setOnKeyListener(onKeyListener);
        }
        @Override
        protected void onUnbindRowViewHolder(RowPresenter.ViewHolder vh) {
            super.onUnbindRowViewHolder(vh);
            vh.setOnKeyListener(null);
        }
    };

    // secondaryActionsAdapter setup not shown
    presenter.setOnActionClickedListener(new OnActionClickedListener() {
        @Override
        public void onActionClicked(Action action) {
            dispatchAction(action);
        }
    });

    return presenter;
}

结果如何？没有预期的标题/副标题显示，但现在主控件栏和其他行之间的间距更大：

---

我可能做错了什么，或者这是leanback库的错误？

如果没有这两行文本，播放控件现在位于该视图的顶部。您可能可以对播放控件应用边距或填充，以将其移动到预期位置。

结果显示，播放控件需要在其上方有一些视图，这样它们就不会占据容器视图的顶部（@Nick是对的）。但我想分享我的解决方案，以防有人有类似的需求

PlaybackControlsRowPresenter可以接受其构造函数中的任何演示者，而不仅仅是AbstractDetailsDescriptionPresenter。因此createControlsRowAndPresenter（）应该如下所示：

EmojiRowPresenter emojiRowPresenter = new EmojiRowPresenter() {
            @Override
            protected void onBindEmojiInfo(EmojiRowView rowView, EmojiInfo emojiInfo) {
                rowView.setEmojiInfo(emojiInfo);
            }
        };
PlaybackControlsRowPresenter presenter = new PlaybackControlsRowPresenter(emojiRowPresenter) { // replace the default description presenter with custom presenter
... 
}

// everything else stays as before

public abstract class EmojiRowPresenter extends Presenter {
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent) {
        EmojiRowView emojiRowView = new EmojiRowView(parent.getContext());
        emojiRowView.setFocusable(true);
        emojiRowView.setFocusableInTouchMode(true);
        return new ViewHolder(emojiRowView);
    }

    @Override
    public void onBindViewHolder(Presenter.ViewHolder viewHolder, Object item) {
        EmojiRowView emojiRowView = (EmojiRowView) viewHolder.view;
        PlaybackControlHelper glue = (PlaybackControlHelper) item;
        EmojiInfo emojiInfo = glue.getEmojiInfo();
        if (emojiInfo != null) {
            onBindEmojiInfo(emojiRowView, emojiInfo);
        }
    }

    @Override
    public void onUnbindViewHolder(Presenter.ViewHolder viewHolder) {
        // ...
    }

    protected abstract void onBindEmojiInfo(EmojiRowView rowView, EmojiInfo emojiInfo);
}

EmojiRowPresenter是Presenter的一个子类，如下所示：

EmojiRowPresenter emojiRowPresenter = new EmojiRowPresenter() {
            @Override
            protected void onBindEmojiInfo(EmojiRowView rowView, EmojiInfo emojiInfo) {
                rowView.setEmojiInfo(emojiInfo);
            }
        };
PlaybackControlsRowPresenter presenter = new PlaybackControlsRowPresenter(emojiRowPresenter) { // replace the default description presenter with custom presenter
... 
}

// everything else stays as before

public abstract class EmojiRowPresenter extends Presenter {
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent) {
        EmojiRowView emojiRowView = new EmojiRowView(parent.getContext());
        emojiRowView.setFocusable(true);
        emojiRowView.setFocusableInTouchMode(true);
        return new ViewHolder(emojiRowView);
    }

    @Override
    public void onBindViewHolder(Presenter.ViewHolder viewHolder, Object item) {
        EmojiRowView emojiRowView = (EmojiRowView) viewHolder.view;
        PlaybackControlHelper glue = (PlaybackControlHelper) item;
        EmojiInfo emojiInfo = glue.getEmojiInfo();
        if (emojiInfo != null) {
            onBindEmojiInfo(emojiRowView, emojiInfo);
        }
    }

    @Override
    public void onUnbindViewHolder(Presenter.ViewHolder viewHolder) {
        // ...
    }

    protected abstract void onBindEmojiInfo(EmojiRowView rowView, EmojiInfo emojiInfo);
}

当然，EmojiRowView从定义每个项目的布局创建视图。以下是最终结果：