创建一个详情presenter Leanback library提供了视频浏览框架，你可以使用presenter控制数据在屏幕上的显示，包括视频详情。这个框架为止提供了AbstractDetailsDescriptionPresenter，你需要实现onBindDescription()，将数据与视图绑定。如下：
public class DetailsDescriptionPresenterextends AbstractDetailsDescriptionPresenter {
@Override
protected void onBindDescription(ViewHolder viewHolder, Object itemData) {
MyMediaItemDetails details = (MyMediaItemDetails) itemData;
// itemData包含视频的详细信息
//需要显示视频的详细信息
// viewHolder.getTitle().setText(details.getShortTitle());
// 使用静态数据测试：
viewHolder.getTitle().setText(itemData.toString());
viewHolder.getSubtitle().setText("2014DramaTV-14");
viewHolder.getBody().setText("Lorem ipsum dolor sit amet, consectetur "
+ "adipisicing elit, sed do eiusmod tempor incididunt ut labore "
+ " et dolore magna aliqua. Ut enim ad minim veniam, quis "
+ "nostrud exercitation ullamco laboris nisi ut aliquip ex ea "
+ "commodo consequat.");
}
}
继承DetailsFragment 使用DetailsFragment来显示视频的详细信息，它提供额外的内容，比如：预览图片，关于视频的操作项（购买、播放、关注等）。您还可以提供额外的内容，如相关视频或演员的列表。如下：
public class MediaItemDetailsFragment extends DetailsFragment {private static final String TAG = "MediaItemDetailsFragment";
private ArrayObjectAdapter mRowsAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
Log.i(TAG, "onCreate");
super.onCreate(savedInstanceState);
buildDetails();
}private void buildDetails() {
ClassPresenterSelector selector = new ClassPresenterSelector();
// 将视频详细信息的presenter附加到rowPresenter上
FullWidthDetailsOverviewRowPresenter rowPresenter =
new FullWidthDetailsOverviewRowPresenter(
new DetailsDescriptionPresenter());
selector.addClassPresenter(DetailsOverviewRow.class, rowPresenter);
selector.addClassPresenter(ListRow.class,
new ListRowPresenter());
mRowsAdapter = new ArrayObjectAdapter(selector);
Resources res = getActivity().getResources();
DetailsOverviewRow detailsOverview = new DetailsOverviewRow(
"Media Item Details");
// 给详情视图添加图片和操作
detailsOverview.setImageDrawable(res.getDrawable(R.drawable.jelly_beans));
detailsOverview.addAction(new Action(1, "Buy $9.99"));
detailsOverview.addAction(new Action(2, "Rent $2.99"));
mRowsAdapter.add(detailsOverview);
// 添加相关项
ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter(
new StringPresenter());
listRowAdapter.add("Media Item 1");
listRowAdapter.add("Media Item 2");
listRowAdapter.add("Media Item 3");
HeaderItem header = new HeaderItem(0, "Related Items", null);
mRowsAdapter.add(new ListRow(header, listRowAdapter));
setAdapter(mRowsAdapter);
}
}
创建详情Activity 创建一个activity包含DetailsFragment来显示详情。
创建布局:
创建Activity：
public class DetailsActivity extends Activity{@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.details);
}
}
【Android TV Leanback (七)（详情视图）】
注册：
...定义一个Listener监听每项的点击
public class BrowseMediaActivity extends Activity {
...@Override
protected void onCreate(Bundle savedInstanceState) {
...// create the media item rows
buildRowsAdapter();
// add a listener for selected items
mBrowseFragment.OnItemViewClickedListener(
new OnItemViewClickedListener() {
@Override
public void onItemClicked(Object item, Row row) {
System.out.println("Media Item clicked: " + item.toString());
Intent intent = new Intent(BrowseMediaActivity.this,
DetailsActivity.class);
// pass the item information
intent.getExtras().putLong("id", item.getId());
startActivity(intent);
}
});
}
}
