AndroidTV - 为 X 行数自定义 ListRow。失去焦点

Question

我在我的 Android TV 项目中使用了 Leanback 库。我想自定义 ListRow，这样我就可以更改要显示的内容行的数量(默认为 1)。

我遵循了指南:https://corochann.com/browsefragment-listrow-customization-android-tv-application-hands-on-tutorial-18-705.html

我想到的是:

class CustomListRowPresenter : ListRowPresenter() {

override fun onBindRowViewHolder(holder: RowPresenter.ViewHolder, item: Any) {
    /* This two line codes changes the number of rows of ListRow */
    val numRows = (item as CustomListRow).numRows
    (holder as ListRowPresenter.ViewHolder).gridView.setNumRows(numRows)

    super.onBindRowViewHolder(holder, item)
}

override fun initializeRowViewHolder(holder: RowPresenter.ViewHolder) {
    super.initializeRowViewHolder(holder)

    /* Disable Shadow */
    shadowEnabled = false
}

companion object {
    private val TAG = CustomListRowPresenter::class.java.simpleName
}

}




class CustomListRow : ListRow {
var numRows = 1

constructor(header: HeaderItem, adapter: ObjectAdapter) : super(header, adapter) {}

constructor(id: Long, header: HeaderItem, adapter: ObjectAdapter) : super(id, header, adapter) {}

constructor(adapter: ObjectAdapter) : super(adapter) {}

companion object {

    private val TAG = CustomListRow::class.java.simpleName
}

}

和:

override onCreate() {
    val adapter = SparseArrayObjectAdapter(CustomListRowPresenter())
    setAdapter(adapter)
}

private fun setContent(content: List<Data>) {
    content.forEachIndexed { index, data ->
        val position = index.toLong()
        val headerItem = HeaderItem(position, data.title)
        val presenterSelector = getMediaObjectPresenterSelector()
        val dataAdapter = ArrayObjectAdapter(presenterSelector)
        val listRow = CustomListRow(position, headerItem, dataAdapter)
        data.content.forEach { x ->
            dataAdapter.add(x)
        }
        listRow.numRows = 5
        dataAdapters.add(dataAdapter)
        adapter.set(position.toInt(), listRow)
    }
    refresh()
}

所以，一切都很好。我得到了我想要的行，但是有一个问题。例如，如果我想显示 2 行，它就完美了。如果我想显示超过 2 个(这样您在 View 中看不到第二个 customListRow)，它就没有焦点。基本上，如果我有 2+ 行并且我尝试从左到右从下到上移动，焦点仅在前 2 行上工作完美。什么可能导致此问题以及如何解决？

想要的输出:

数据:

BIG-OBJ:
    title: "1"
    list-of-small-objs: small1, small2, small3
BIG-OBJ2:
    title: "2"
    list-of-small-objs: small1, small2, small3
...

Answer 1

请在java中找到我的代码。

这里的 ma​​inList 包含标题名称和将添加到特定标题下的数据列表。

在我的场景中，我想要连续 10 个数据，所以使用 j 的 for loop 我已经做到了，并且在同一标题下添加了多行。

for (int i = 0; i < mainList.size(); i++) {
    ArrayList<HashMap<String,String>> listDataMap = (ArrayList<HashMap<String,String>>) mainList.get(i).get("dataList");

    if(!listDataMap.isEmpty()){
        CardPresenter cardPresenter = new CardPresenter();

        String categoryName = (String) mainList.get(i).get("categoryName");
        ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter(cardPresenter);

        List<Movie> list = MovieList.setupGames(listDataMap,i+2);
        for (int j = 1; j <= listDataMap.size(); j++) {
            listRowAdapter.add(list.get(j-1));
            if (j%10 == 0){
                HeaderItem header = new HeaderItem( categoryName);
                mAdapter.add(new ListRow(header, listRowAdapter));
                categoryName = "";
                listRowAdapter = new ArrayObjectAdapter(cardPresenter);
            }else if ( j ==  listDataMap.size() ){
                HeaderItem header = new HeaderItem( categoryName);
                mAdapter.add(new ListRow(header, listRowAdapter));
            }
        }
    }
}