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POUpdation of progress bar on orientation change in android
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copied!<p>I have a fragment and I am setting listview on fragment.</p> <p>Following is the code:</p> <pre><code>public class AttachmentsFragment extends Fragment { ListView lstView = null; @Override public void onActivityCreated(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onActivityCreated(savedInstanceState); } @Override public void onAttach(Activity activity) { // TODO Auto-generated method stub super.onAttach(activity); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //retains fragment instance across Activity re-creation setRetainInstance(true); objects = new ArrayList<AttachModel>(); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = null; view = inflater.inflate(R.layout.tab_attachment, container, false); lstView = (ListView) view.findViewById(R.id.listViewAttachment); adapter = new AttachAdapter(getActivity(), 0, 0, objects); lstView.setAdapter(adapter); return view; } </code></pre> <p>}</p> <p>In the adapter I have a progress bar and a textview to show the progress of the progress bar. A button to start and stop the progress bar</p> <pre><code>public class AttachAdapter extends ArrayAdapter<AttachModel> implements OnClickListener { Context context; ArrayList<AttachModel> objects = new ArrayList<AttachModel>(); AttachModel info; //Activity act; AttachModel model; public AttachmentsAdapter(Context context, int resource, int textViewResourceId, ArrayList<AttachmentsModel> objects) { super(context, textViewResourceId, textViewResourceId, objects); this.context = context; this.objects = objects; } // no. of attachments available @Override public int getCount() { return objects.size(); } @Override public AttachmentsModel getItem(int position) { return objects.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, final ViewGroup parent) { View row = convertView; ViewHolder holder = null; if(null == row) { LayoutInflater inflater = (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE); row = inflater.inflate(R.layout.attachment_list_item, parent, false); //textview for showing progress holder.textViewProgress = (TextView) row.findViewById(R.id.txtViewPg); //progress bar to show the progress holder.progressBar = (ProgressBar) row.findViewById(R.id.pgBar); holder.progressBar.setTag(position); holder.textViewProgress.setVisibility(TextView.VISIBLE); holder.img_view_fileIcon.setVisibility(ImageView.VISIBLE); holder.progressBar.setVisibility(ProgressBar.VISIBLE); //to start stop the progress bar holder.button = (Button)row.findViewById(R.id.img_btn_download); holder.button.setVisibility(Button.VISIBLE); holder.button.setTag(position); holder.button.setOnClickListener(this); row.setTag(holder); } else { holder = (ViewHolder) row.getTag(); } return row; } private class ViewHolder { TextView textViewProgress; ProgressBar progressBar; Button button; boolean downloadFlag = false; } @Override public void onClick(View v) { View vParent=(View) v.getParent(); ViewHolder tempHolder = null; tempHolder=(ViewHolder) vParent.getTag(); //toggle button like functionality if(!tempHolder.downloadFlag) { tempHolder.downloadFlag = true; tempHolder.progressBarStatus = 0; async = new AsyncTaskAttachments(tempHolder, objects.get(Integer.parseInt(v.getTag().toString())).getFilePath()); tempHolder.async.execute(); objects.get((Integer)tempHolder.progressBar.getTag()).setAsyncTask(tempHolder.async); }else { tempHolder.downloadFlag = false; tempHolder.progressBar.setProgress(0); tempHolder.textViewProgress.setVisibility(TextView.GONE); tempHolder.textViewProgress.setText(""); tempHolder.progressBarStatus = 0; tempHolder.async.cancel(true); } } public class AsyncTaskAttachments extends AsyncTask<Void, Void, Void> { private ViewHolder holder; public AsyncTaskAttachments(ViewHolder holder, String filePath) { this.holder = holder; this.filePath = filePath; } public void attach(Activity act) { this.act = act; } @Override protected Void doInBackground(Void... params) { // TODO Auto-generated method stub holder.progressBarStatus = 0; for(int i=0; i<=10; i++) { try { Thread.sleep(1000); holder.progressBarStatus = i*10; if(isCancelled()) { break; } publishProgress(); }catch (Exception e) { // TODO: handle exception } } return null; } /* (non-Javadoc) * @see android.os.AsyncTask#onPostExecute(java.lang.Object) */ @Override protected void onPostExecute(Void result) { // TODO Auto-generated method stub super.onPostExecute(result); } /* (non-Javadoc) * @see android.os.AsyncTask#onPreExecute() */ @Override protected void onPreExecute() { // TODO Auto-generated method stub super.onPreExecute(); holder.progressBarStatus = 0; holder.textViewProgress.setText("" + holder.progressBarStatus + "%"); holder.progressBar.setProgress(holder.progressBarStatus); } /* (non-Javadoc) * @see android.os.AsyncTask#onProgressUpdate(Progress[]) */ @Override protected void onProgressUpdate(Void... values) { // TODO Auto-generated method stub super.onProgressUpdate(values); // TODO Auto-generated method stub holder.progressBar.setProgress(holder.progressBarStatus); holder.textViewProgress.setText("" + holder.progressBarStatus + "%"); } } } </code></pre> <p>Note: This is just to show the way I am doing it. This is just a glimpse. I need to know whether I am on the right track or not.</p> <p>On Orientation change, the progress bar is not able to retain and start the progress from where the orientation change.</p> <p>Thanks in advance</p>

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