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我有一个浏览片段，它在调用 PHP 页面时显示 PHP 生成的 JSON 文件中的行。我试图让浏览片段刷新行，因为 JSON 数据会定期更改。

按照https://hackernoon.com/how-to-refresh-the-android-tv-browsefragment-6e4d2d3c6690上的说明，我添加了 ArrayOjectAdapter 中的 clear() 和 addAll() 方法。

我的browseFragment的主要部分是：

public class MainFragment extends BrowseSupportFragment
        implements LoaderManager.LoaderCallbacks<LinkedHashMap<String, List<Video>>>{

    private static final int BACKGROUND_UPDATE_DELAY = 300;

    private static final String TAG = MainFragment.class.getSimpleName();

    static final int GRID_ITEM_WIDTH = 300;
    private static final int GRID_ITEM_HEIGHT = 200;
    private final Handler mHandler = new Handler();
    private ArrayObjectAdapter mRowsAdapter;
    private Drawable mDefaultBackground;
    private DisplayMetrics mMetrics;
    private Runnable mBackgroundTask;
    private Uri mBackgroundURI;
    private BackgroundManager mBackgroundManager;
    private CustomListRow mGridItemListRow;
    private LoaderManager mLoaderManager;
    private static final int CATEGORY_LOADER = 123; 

    ArrayList<Video> mItems = null;
    private ArrayList<CustomListRow> mVideoListRowArray;
    private static final int VIDEO_ITEM_LOADER_ID = 1;


    private static PicassoBackgroundManager picassoBackgroundManager = null;

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {


        super.onActivityCreated(savedInstanceState);

        prepareBackgroundManager();

        setupUIElements();

        loadRows();
        setRows();

        mLoaderManager = LoaderManager.getInstance(this);
        mLoaderManager.initLoader(VIDEO_ITEM_LOADER_ID, null, this);

        setupEventListeners();
        prepareEntranceTransition();


        picassoBackgroundManager = new PicassoBackgroundManager(getActivity());
        picassoBackgroundManager.updateBackgroundWithDelay("http://twende.phidampalmgardens.com/images/bkground/background1.jpg");

        updateRecommendations();


        if(mVideoListRowArray != null) {

            new Handler().postDelayed(new Runnable() {
                public void run() {
                    //mLoaderManager.restartLoader(CATEGORY_LOADER, null, MainFragment.this);

                    mRowsAdapter.clear();
                    mRowsAdapter.addAll(0, mVideoListRowArray);
                }
            }, 2000);

        }

    }

不幸的是，我仍然无法在不关闭并重新打开应用程序的情况下刷新/更新行

4

1 回答 1

1

尝试添加mRowsAdapter.notifyDataSetChanged();语句：

mRowsAdapter.clear();
mRowsAdapter.addAll(0, mVideoListRowArray);
mRowsAdapter.notifyDataSetChanged();
于 2019-05-11T17:06:13.510 回答