How to start and finish progressBar dynamically in android

Question

When I skip second activity class from first activity class, I will start imageprocessing on certain image in second activity and then until new image comes to screen I wnt

Answer 1

Try using Async task as shown below:

try{
class test extends AsyncTask{


     TextView tv_per;
     int mprogress;

    Dialog UpdateDialog = new Dialog(ClassContext);

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

        UpdateDialog.setTitle(getResources().getString(R.string.app_name));
        UpdateDialog.setContentView(R.layout.horizontalprogressdialog);
        TextView dialog_message =  (TextView)UpdateDialog.findViewById(R.id.titleTvLeft);
        tv_per = (TextView)UpdateDialog.findViewById(R.id.hpd_tv_percentage);
        dialog_message.setText(getResources().getString(R.string.dialog_retrieving_data));
        dialog_message.setGravity(Gravity.RIGHT);
        UpdateDialog.setCancelable(false);
        UpdateDialog.show();
        super.onPreExecute();
    }



    @Override
    protected void onProgressUpdate(Object... values) {
        // TODO Auto-generated method stub
        ProgressBar update = (ProgressBar)UpdateDialog.findViewById(R.id.horizontalProgressBar);
        update.setProgress((Integer) values[0]);
        int percent =  (Integer) values[0];
        if(percent>=100)
        {
            percent=100;
        }
        tv_per = (TextView)UpdateDialog.findViewById(R.id.hpd_tv_percentage);
         tv_per.setText(""+percent);
    }



    @Override
    protected Object doInBackground(Object... params) {
        // TODO Auto-generated method stub
        //your code
}

        super.onPostExecute(result);
        UpdateDialog.dismiss();
    }

 }
 new test().execute(null);

 }
catch(Exception e)
{
 e.printStackTrace();
}