Android: I am receiving ANR notification sometimes in my application, how can I prevent showing this message?

Question

I am receiving ANR notification sometimes in my application. The code is working fine though, how can I prevent showing this message. Please help.

Answer 1

I assume the ANR you are referring to is App Not Responding.
The reason you receive ANR notification is that the app is working too much on it's main thread. If you are going to perform any complex operation (time consuming) then you should probably use a separate thread for it. Doing so you will not freeze your main thread.

An example code for developer.android.com

private class DownloadFilesTask extends AsyncTask<URL, Integer, Long> {
    // Do the long-running work in here
    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;
    }

    // This is called each time you call publishProgress()
    protected void onProgressUpdate(Integer... progress) {
        setProgressPercent(progress[0]);
    }

    // This is called when doInBackground() is finished
    protected void onPostExecute(Long result) {
        showNotification("Downloaded " + result + " bytes");
    }
}

new DownloadFilesTask().execute(url1, url2, url3); //Your call

Official documentation is here