How to empty a gridview on Android?

Question

I am developping a launcher with two different profiles : one is the main one the other is secondary. If I go on the play store and then come back with the "back" button, I land on my main profile, but there, the icons of my gridview (displayed through an adapter) appear in double (if I install two apps from the play store, coming back with the back button will give me icons 3 times and so on).

If I restart my main activity in the onresume method, things go fine and my icons aren't doubled, or tripled or whaterver. But I don't want to restart the activity, I only want to empty my gridview.

if((admin == true) ){
        Intent intent = getIntent();
        finish();
        startActivity(intent);}

Have you try `adpater.clear()` and the `adapter.notifyDataSetchanged()` or simply `gridview.removeAllViews()` ? — Pragnani, Apr 30 '13 at 17:46
@Pragnani Calling `removeAllViews()` on a `GridView` throws exception. — samus, Jun 26 '17 at 16:11

score 11 · Answer 1 · answered Jul 14 '13 at 08:37

11

I had the same problem myself. The easiest way to do this is:

gridview.setAdapter(null);

answered Jul 14 '13 at 08:37

Bogdan Alexandru

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`setAdapter()` calls `removeAllViewsInLayout()` – samus Jun 26 '17 at 16:09

score 3 · Answer 2 · answered Aug 03 '16 at 02:11

you can put your data to be loaded with gridview into a list, then when you want to update your gridview ,just use

    list.clear();

then reload your updated data to your list,set adapter again.Here below shows my code:

I use gridview to load images from web,fetched by Asynctask;when I want to update those images when back from setting to my Fragment/Activity, I clear the list containing data and refilling work is done in AsyncTask.

    public void onStart() {
    super.onStart();
    list.clear();
    //setAdapter(null) is not useful here after testing.
    SharedPreferences preferences= PreferenceManager.getDefaultSharedPreferences(getActivity());
    String sort_order=preferences.getString("pref_sortOrder","popular");
    ParseDataTask parseDataTask=new ParseDataTask();
    parseDataTask.execute(sort_order);
    }

hope it helps :)

score 0 · Answer 3 · answered Apr 30 '13 at 17:46

0

Remove items from adapter of the GridView. You can obtain adapter by calling #getAdapter() You may need to implement cleaning method in adapter if it not exist. If adapter extends BaseAdapter you may need to call #notifyDataSetChanged()

answered Apr 30 '13 at 17:46

koral

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How to empty a gridview on Android?

3 Answers3