re instantiate a PagerAdapter

Question

How can i re-instantiate a ViewPager ? My adapter looks like this :

private class MyPagerAdapter extends PagerAdapter{
    @Override
    public int getCount() {
            return NUM_AWESOME_VIEWS;
    }

    @Override
    public Object instantiateItem(View collection, int position) {
        LayoutInflater inflater = (LayoutInflater)cxt.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View layout = inflater.inflate(R.layout.search_result, null);
        //
        TextView title = (TextView)layout.findViewById(R.id.search_result_title);
        TextView body = (TextView)layout.findViewById(R.id.search_result_body);
        TextView byline = (TextView)layout.findViewById(R.id.search_result_byline);
        TextView day = (TextView)layout.findViewById(R.id.search_result_date_day);
        TextView month = (TextView)layout.findViewById(R.id.search_result_date_month);
        TextView year = (TextView)layout.findViewById(R.id.search_result_date_year);
        TextView page = (TextView)layout.findViewById(R.id.search_result_page);
        TextView page_max = (TextView)layout.findViewById(R.id.search_result_page_max);
        //
        title.setText(list_title.get(position).toString());
        body.setText(list_body.get(position).toString());
        day.setText(list_day.get(position).toString());
        month.setText(list_month.get(position).toString());
        year.setText(list_year.get(position).toString());
        byline.setText(list_byline.get(position).toString());
        page.setText(Integer.toString(position+1));
        page_max.setText(Integer.toString(NUM_AWESOME_VIEWS));
        //
        ((ViewPager) collection).addView(layout,0);
        return layout;
    }

    @Override
    public void destroyItem(View collection, int position, Object view) {
            ((ViewPager) collection).removeView((View) view);
    }



    @Override
    public boolean isViewFromObject(View view, Object object) {
            return view==((View)object);
    }

    @Override
    public void finishUpdate(View arg0) {}


    @Override
    public void restoreState(Parcelable arg0, ClassLoader arg1) {}

    @Override
    public Parcelable saveState() {
            return null;
    }

    @Override
    public void startUpdate(View arg0) {}

}

I found a way to reload a bunch of data into the list, but how can i reload all the pages from the onPostExecute (Asynctask).

score 3 · Answer 1 · answered Jan 31 '12 at 19:13

3

Add following to your MyPagerAdapter class:

@Override
public int getItemPosition(Object object) {
    return POSITION_NONE;
}

and call

myPager.getAdapter().notifyDataSetChanged();

from onPostExecute of your AsyncTask

answered Jan 31 '12 at 19:13

Terel

3,857
1
25
28

score 0 · Answer 2 · answered Aug 17 '11 at 13:17

0

I think calling notifyDataSetChanged(); using the adapter reference will solve your problems.

answered Aug 17 '11 at 13:17

rui.araujo

9,597
1
18
24

where do i have to call it ? after the execution from Asynctask ? – Tsunaze Aug 17 '11 at 14:44
on the onPostExecute of your AsyncTask. After loading everything that you want to change on your list. – rui.araujo Aug 18 '11 at 10:16
the thing is working but it's odd because i need to change pages and return to see my new pages.. – Tsunaze Aug 21 '11 at 16:45
Using the adapter reference use setCurrentItem(0); – rui.araujo Aug 22 '11 at 22:27
I still need to change my pages to see the changes. – Tsunaze Aug 23 '11 at 18:32
Using the view pager reference, try invalidate(); after the nofityDataSetChanged(); – rui.araujo Aug 24 '11 at 00:54
I have confirmed that my previous answers did not work. See my new answer [here](http://stackoverflow.com/questions/7263291/viewpager-pageradapter-not-updating-the-view/7287121#7287121). – rui.araujo Sep 02 '11 at 17:29

re instantiate a PagerAdapter

2 Answers2