如何刷新Gallery Media以在GridView中显示新文件？

Question

我有一个包含3个片段的活动：

1. 画
2. 摄像机
3. 图片

我想在我的gridview上显示要更新的新录制视频，我该如何实现这一结果？

public class VideoFragment extends Fragment {

public Cursor cursor;
public int columnIndex;
String VideoPath;
View view;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    view = inflater.inflate(R.layout.activity_videos, container, false);
    getVideos();
    return view;
}

public void getVideos(){
    String[] projection = {MediaStore.Video.Thumbnails._ID};
    cursor = getActivity().managedQuery(MediaStore.Video.Thumbnails.EXTERNAL_CONTENT_URI, projection, null, null,
             MediaStore.Video.Thumbnails.VIDEO_ID);
    columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Video.Thumbnails._ID);
    GridView VideoImages = (GridView) view.findViewById(R.id.VideoGrid1);
    VideoImages.setAdapter(new VideoAdapter(getActivity()));
    VideoImages.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            String[] VideoData = {MediaStore.Video.Media.DATA};
            cursor = getActivity().managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, VideoData, null,
                    null,
                    null);
            columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA);
            cursor.moveToPosition(position);
            VideoPath = cursor.getString(columnIndex);
        }
    });

}

Answer 1

使用adapter.notifydatasetchanged()。这将更新网格元素。将adapter更改为gridview adapter name。