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我已经实现SyncAdapter了调用 web 服务和插入/更新数据库。我想显示其中的一些数据，ListView所以我ListFragment在女巫中实现了数据通过CursorAdapter. 一切正常，除了当我从网络获取新数据并将其插入数据库时​​，CursorAdapter未更新且新数据未显示在ListView

在我的ContentProvider, 每次插入后我调用context.getContentResolver().notifyChange(uri, null);

这是ListFragment实现适配器的一部分

mAdapter = new ObavijestiAdapter(getActivity(), null, 0);
setListAdapter(mAdapter);

这是我的自定义适配器

public class ObavijestiAdapter extends CursorAdapter {
private Cursor mCursor;
private Context mContext;
private final LayoutInflater mInflater;

static class ViewHolder {
    public TextView hTextNaslov;
    public TextView hTextOpis;
    public ImageView hImage;
}
public ObavijestiAdapter(Context context, Cursor c, int flags) {
    super(context, c, flags);
    mInflater = LayoutInflater.from(context);
    mContext = context;
}

@Override
public void bindView(View view, Context context, Cursor cursor) {
    final ViewHolder holder = (ViewHolder)view.getTag();

    //TODO: REMOVE AFTER IMPLEMENTING REAL IMAGE
    int w = 24, h = 24;
    Bitmap.Config conf = Bitmap.Config.ARGB_8888; // see other conf types
    Bitmap bmp = Bitmap.createBitmap(w, h, conf); // this creates a MUTABLE bitmap
    //END REMOVE

    holder.hImage.setImageBitmap(bmp);
    holder.hTextNaslov.setText(cursor.getString(cursor.getColumnIndex(DataContract.Obavijesti.OBAVIJESTI_NASLOV)));
    holder.hTextOpis.setText(cursor.getString(cursor.getColumnIndex(DataContract.Obavijesti.OBAVIJESTI_OPIS)));

}


@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
    View view=mInflater.inflate(R.layout.fragment_obavijesti_row,parent,false);

    final ViewHolder holder = new ViewHolder();
    holder.hTextOpis = (TextView) view.findViewById(R.id.obOpis);
    holder.hTextNaslov = (TextView) view.findViewById(R.id.obNaslov);
    holder.hImage = (ImageView) view.findViewById(R.id.oblist_image);
    view.setTag(holder);
    return view;
}

有谁能够帮我？

4

2 回答 2

2

我终于让这个工作了。因此，对于任何尝试做类似事情的人，您必须cursor.setNotificationUri(getContext().getContentResolver(), uri);在.query. ContentProvider就是这样……

但是，如果您像我一样并且正在从 Web 服务接收数据，请记住不要放在.notifyDataSetChanged()ContentProvider.update/.insert/.delete上，而是放在调用此方法的适配器上SyncAdapter。在我的例子中

mContentResolver.applyBatch(ScheduleContract.CONTENT_AUTHORITY, batch);
mContentResolver.notifyChange(DataContract.Obavijesti.CONTENT_URI, null);

我希望，对某人来说，这会有所帮助

于 2015-02-28T12:55:10.483 回答
-1

更新信息后尝试使您正在使用的视图无效。

listview.invalidate();
于 2015-02-28T00:08:52.490 回答