如何始终在RowsFragment中显示标题 [英] how to always show headers in RowsFragment

问题描述

我正在尝试创建一个类似于Youtube应用程序的Android电视应用程序.并且我正在使用

解决方案

如Mayur Kaul所述，您只需要致电

  mRowsFragment.setExpand(true) 

但是在这种情况下，每次将调用 onAttachedToWindow(...)方法时(请参见 android.support.v17.leanback.app.RowsFragment -ItemBridgeAdapter.AdapterListener mBridgeAdapterListener )，标题标题仍然会被隐藏.

最后的解决方案，巫婆为我工作，它只是在您的RowsFragment实现中简单地重写 setExpand()方法，如下所示:

  @Overridepublic void setExpand(boolean expand){super.setExpand(true);} 

I'm trying to create an Android tv application similar to the Youtube application. and I am using the Sofa library to do that. Now the problem comes when I am trying to show the headers for individual items in the RowsFragment even when the RowsFragment doesn't have a focus. following is the code for loading the dataset into browseFragment

private void loadRowsCustom() {
        adapter = new ArrayObjectAdapter();

        int split = 3;
        int rowsFragmentCount = videoList.size() / split + (videoList.size() % split != 0 ? 1 : 0);

        for (int i = 0; i < rowsFragmentCount; i++) {

            ListRowPresenter lrp = new ListRowPresenter(FocusHighlight.ZOOM_FACTOR_LARGE);
            ArrayObjectAdapter rowsAdapter = new ArrayObjectAdapter(lrp);

            String category = "Category";

            for (int j = 0; j < split && (i * split + j) < videoList.size(); j++) {
                Video[] videos = videoList.get(i * split + j);
                ArrayObjectAdapter rowCollAdapter = new ArrayObjectAdapter(new VideoPresenter());
                rowCollAdapter.addAll(0, Arrays.asList(videos));
                ListRow row = new ListRow(new HeaderItem(videos[0].category),rowCollAdapter);
                rowsAdapter.add(row);
                category = videos[0].category;
            }

            ArrayObjectAdapter fragmentAdapter = new ArrayObjectAdapter();
            RowsSupportFragment rowsSupportFragment = new RowsSupportFragment();
            rowsSupportFragment.setAdapter(rowsAdapter);
            rowsSupportFragment.enableRowScaling(false);
            fragmentAdapter.add(rowsSupportFragment);
            adapter.add(new ListRow(new HeaderItem(category), fragmentAdapter));
        }

        browseSupportFragment.setAdapter(adapter);
        browseSupportFragment.setHeadersState(BrowseSupportFragment.HEADERS_ENABLED);
        browseSupportFragment.setOnSearchClickedListener(searchClickListener);
        browseSupportFragment.setOnItemViewClickedListener(browseClickListener);
        browseSupportFragment.setTitle("Google Videos");
    }

The required and the current implementation is described as in the screenshots below:

解决方案

As Mayur Kaul already mentioned, u just need to call

mRowsFragment.setExpand(true)

But in this case everytime when onAttachedToWindow(...) method would be called (see android.support.v17.leanback.app.RowsFragment - ItemBridgeAdapter.AdapterListener mBridgeAdapterListener), your header titles anyway would be hidden.

So final solution, witch worked for me it's just simply override setExpand() method in your RowsFragment implementation like below:

@Override
    public void setExpand(boolean expand) {
        super.setExpand(true);
    }

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