Not able to publish progress from async task do in background's while loop - Android

Question

I want to update dialog\'s download progress from doInBackground.
I am printing log as well as publishing progress.
Neither of them are working.

It up

Answer 1

One possible explanation for the behaviour is that reading from remote input stream and writing it into output buffer is extremely fast. I tried the same code but with just a loop running for 10 times.

int total = 0;
while(total <= 100){
    progress = total;
    total += 10;
    publishProgress();
}

Even I could not see the progress dialog at first, so put a Thread.sleep() in the loop and the progress dialog works just fine.

int total = 0;
        while(total <= 100){
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            progress = total;
            total += 10;
            publishProgress();
        }

Try to log the time (System.currentTimeMillis()) at which you are writing into the output buffer.

Hope it helps.

Answer 2

remove super from onProgressUpdate and then try

@Override
protected void onProgressUpdate(Void... values) {
    //super.onProgressUpdate(values);
    mProgressDialog.setProgress(progress);
}

if it doesn't work than add a sleep statement in your loop so that this loop will free the processor and give time to publish the progress

try {
    Thread.sleep(200);
} catch (InterruptedException e) {
    e.printStackTrace();
}