How can you pass multiple primitive parameters to AsyncTask?

Question

There are related questions, such as How can I pass in 2 parameters to a AsyncTask class? , but I ran into the difficulty of trying in vain to pass multiple primitives as pa

Answer 1

This is solved via subclassing. Google has an example for solving this problem (subclassing) in the official Android AsyncTask Documentation:

http://developer.android.com/reference/android/os/AsyncTask.html

Example:

private class DownloadFilesTask extends AsyncTask {
    protected Long doInBackground(URL... urls) {
        int count = urls.length;
        long totalSize = 0;
        for (int i = 0; i < count; i++) {
            totalSize += Downloader.downloadFile(urls[i]);
            publishProgress((int) ((i / (float) count) * 100));
                 // Escape early if cancel() is called
            if (isCancelled()) break;
        }
        return totalSize;
    }

    protected void onProgressUpdate(Integer... progress) {
        setProgressPercent(progress[0]);
    }

    protected void onPostExecute(Long result) {
        showDialog("Downloaded " + result + " bytes");
    }
}