android中的进度条更新

Question

I'm developing an android application. Working on vertical progress bar.
When I add new item, the item is associated with some percentage value say 30%.
The progress bar need to update from 0% to 30%. And if I add another item with percentage value say 40%, the progress bar need to update from 30% to 70%(30+40) .
How can I do this. Sample code would be helpful. I have posted my code here.

public class VerticalProgressBar extends Activity {

Button buttonStart;
ProgressBar vProgressBar;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.verticalprogressbar);
    buttonStart = (Button) findViewById(R.id.start);
    vProgressBar = (ProgressBar) findViewById(R.id.vprogressbar);

    buttonStart.setOnClickListener(new Button.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            buttonStart.setClickable(false);
            new asyncTaskUpdateProgress().execute();
        }
    });

}

public class asyncTaskUpdateProgress extends AsyncTask<Void, Integer, Void> {

    int progress;

    @Override
    protected void onPostExecute(Void result) {
        // TODO Auto-generated method stub
        buttonStart.setClickable(true);

    }

    @Override
    protected void onPreExecute() {
        // TODO Auto-generated method stub
        progress = 0;
    }

    @Override
    protected void onProgressUpdate(Integer... values) {
        // TODO Auto-generated method stub
        vProgressBar.setProgress(values[0]);
    }

    @Override
    protected Void doInBackground(Void... arg0) {
        // TODO Auto-generated method stub
        while (progress < 100) {

            progress++;
            publishProgress(progress);
            SystemClock.sleep(100);

        }
        return null;

      }

    }

  }

Answer 1

In onProgressUpdate , use this to add the value to the current progress:

vProgressBar.setProgress(vProgressBar.getProgress() + values[0]);

And in doInBackground where you presumably have your "item", something like:

publishProgress(item.getPercentageValue());