Cannot resolve method 'execute()' in Android

Issue

I am trying to implement Circular ProgressBar in one of my fragment.

I want to attain this using AsyncTask class along with other background process and I want that progress bar to update on onProgressUpdate() method too.

Here's my Fragment implementing ProgressBar:

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {


    // Inflate the layout for this fragment
    rootView = inflater.inflate(R.layout.playlist_fragment, container, false);

    // Setting up progressBar
    progressBar = (ProgressBar) rootView.findViewById(R.id.progressBar);
    progressBar.setProgress(0);

    return rootView;
}

Calling AsyncTask class from within Fragment which says cannot resolve method at setProgressBr(). I think I am not appropriately passing the parameters.

new GetPlaylistAsyncTask(mYouTubeDataApi,getContext(),PlaylistFragment.this)
                .setProgressBar(progressBar)
                .execute(playlistVideos.playlistId, playlistVideos.getNextPageToken());

Here's my AsyncTask class:

    public class GetPlaylistAsyncTask extends AsyncTask<String, Integer, Pair<String, List<Video>>> {
    private static final String TAG = "GetPlaylistAsyncTask";
    private static final Long YOUTUBE_PLAYLIST_MAX_RESULTS = 10L;

    //see: https://developers.google.com/youtube/v3/docs/playlistItems/list
    private static final String YOUTUBE_PLAYLIST_PART = "snippet";
    private static final String YOUTUBE_PLAYLIST_FIELDS = "pageInfo,nextPageToken,items(id,snippet(resourceId/videoId))";
    //see: https://developers.google.com/youtube/v3/docs/videos/list
    private static final String YOUTUBE_VIDEOS_PART = "snippet,contentDetails,statistics"; // video resource properties that the response will include.
    private static final String YOUTUBE_VIDEOS_FIELDS = "items(id,snippet(title,description,thumbnails/high),contentDetails/duration,statistics)"; // selector specifying which fields to include in a partial response.

    private YouTube mYouTubeDataApi;
    Context mContext;
    ProgressBar bar;

    private AsyncResponse theListener;

    public void setProgressBar(ProgressBar bar) {
        this.bar = bar;
    }

    public GetPlaylistAsyncTask(YouTube api, Context context, PlaylistFragment frag ) {
        mYouTubeDataApi = api;
        mContext = context;
        theListener = (AsyncResponse)frag;
    }


    @Override
    protected Pair<String, List<Video>> doInBackground(String... params) {
        final String playlistId = params[0];
        final String nextPageToken;

        if (params.length == 2) {
            nextPageToken = params[1];
        } else {
            nextPageToken = null;
        }

        PlaylistItemListResponse playlistItemListResponse;
        try {
            playlistItemListResponse = mYouTubeDataApi.playlistItems()
                    .list(YOUTUBE_PLAYLIST_PART)
                    .setPlaylistId(playlistId)
                    .setPageToken(nextPageToken)
                    .setFields(YOUTUBE_PLAYLIST_FIELDS)
                    .setMaxResults(YOUTUBE_PLAYLIST_MAX_RESULTS)
                    .setKey(ApiKey.YOUTUBE_API_KEY)
                    .execute();
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }

        if (playlistItemListResponse == null) {
            Log.e(TAG, "Failed to get playlist");
            return null;
        }

        List<String> videoIds = new ArrayList();

        // pull out the video id's from the playlist page
        for (PlaylistItem item : playlistItemListResponse.getItems()) {
            videoIds.add(item.getSnippet().getResourceId().getVideoId());
        }

        // get details of the videos on this playlist page
        VideoListResponse videoListResponse = null;
        try {
            videoListResponse = mYouTubeDataApi.videos()
                    .list(YOUTUBE_VIDEOS_PART)
                    .setFields(YOUTUBE_VIDEOS_FIELDS)
                    .setKey(ApiKey.YOUTUBE_API_KEY)
                    .setId(TextUtils.join(",", videoIds)).execute();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return new Pair(playlistItemListResponse.getNextPageToken(), videoListResponse.getItems());
    }

    @Override
    protected void onPreExecute() {

    }

    @Override
    protected void onProgressUpdate(Integer... values) {
        if (this.bar != null) {
            bar.setProgress(values[0]);
        }
    }

    @Override
    protected void onPostExecute(Pair<String, List<Video>> result) {
        theListener.handleGetPlaylistResult(null,result);
    }
}

Will appreciate a quick fix for the above problem. Thanks in advance.

Solution

.setProgressBar(progressBar) method has a return type void so you cannot chain the calls like this

new GetPlaylistAsyncTask(mYouTubeDataApi,getContext(),PlaylistFragment.this)
                .setProgressBar(progressBar)
                .execute(playlistVideos.playlistId, playlistVideos.getNextPageToken());

Change your setProgressBar() method to the following and it should work

public GetPlaylistAsyncTask setProgressBar(ProgressBar bar) {
        this.bar = bar;
        return this;
}

OR

If you don't want to change the method signature then do the following

final GetPlaylistAsyncTask getPlaylistAsyncTask = new GetPlaylistAsyncTask(mYouTubeDataApi,getContext(),PlaylistFragment.this);
getPlaylistAsyncTask.setProgressBar(progressBar);
getPlaylistAsyncTask.execute(playlistVideos.playlistId, playlistVideos.getNextPageToken());

Also make sure both params playlistVideos.playlistId, playlistVideos.getNextPageToken() are Strings.

Answered By - LeoNeo