Spinner with checkbox items, is it possible?

Question

Spinner with checkbox items, is it possible?

Answer 1

I created a dynamic filled Spinner which gets its content over the Sqlite Database query over the content resolver, it's a Image instead of text when closed, it shows whats selected, and its awesome simple :-)

        spinnerFavorites = (SpinnerMultiSameClick) v.findViewById(R.id.guide_btn_favorites);
        spinnerFavorites.setOnItemSelectedListener(this);    
        ContentResolver resolver = activity.getContentResolver();
        String[] projection = new String[] { DataContract.Favorites.FAVORITES_ID, DataContract.Favorites.NAME };

        Cursor cursor = resolver.query(DataContract.Favorites.CONTENT_URI, projection, null, null, DataContract.Favorites.FAVORITES_ID +" ASC");
        if (cursor.getCount() > 0) {
            // create an array to specify which fields we want to display
            String[] from = new String[] { DataContract.Favorites.NAME, DataContract.Favorites.FAVORITES_ID };
            // create an array of the display item we want to bind our data
            // to
            int[] to = new int[] { android.R.id.text1, android.R.id.text2 };
            SimpleCursorAdapter adapter = new SimpleCursorAdapter(activity, R.layout.ghost_text, cursor, from, to,
                    SimpleCursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);

            // get reference to our spinner
            spinner.setAdapter(adapter);

            adapter.setDropDownViewResource(android.R.layout.simple_list_item_single_choice);


        } else {
            // TODO: Maybe button to make new favList               
            spinnerFavorites.setVisiblity(View.GONE);

        }

Now, it looks like a simple Spinner, what makes it show its selection is this line, it will fill the values and put a radioCheckbox on the right side, the top/1st Element in your list will be preselected.

adapter.setDropDownViewResource(android.R.layout.simple_list_item_single_choice);

there are several other predefined layouts wich work pretty well

• simple_list_item_checked -> shows a checkMark instead of a RadioButton
• simple_list_item_activated_1 or 2 -> Changes BackgroundColor
• simple_list_item_multiple_choice -> CheckBoxes with checkMarks

to complete here is my layout, it shows an marked or unmarked Image (and not whats selected) therefore i specified R.layout.ghost_text in the spinnerAdapter.

here my onItemSelecte which needs the OnItemSelectedListener Interfaces. What it does, it keeps track with a boolean if its the initialisation of the spinner or not. If there is a real click, we extract the information and update another UI Element over a Controller (could also be a callback) if the Clicked Element is the StandardSelected Element i set the SpinnerImage unselected, if its sth else then the standard element i set the spinnerImage selected.

@Override
public void onItemSelected(AdapterView parent, View view, int pos, long id) {

    if (parent.getId() == R.id.guide_btn_favorites) {

        if (!AbsintheViewControllerFactory.getGuideController().isFavoriteListInitialisation()) {
            Cursor c = (Cursor) parent.getItemAtPosition(pos);
            String favid = c.getString(c.getColumnIndexOrThrow(DataContract.Favorites.FAVORITES_ID));
            String name = c.getString(c.getColumnIndexOrThrow(DataContract.Favorites.NAME));
            Log.d(TAG, "Set Filter to FavListId: " + favid + " by its name: " + name);
            if (favid.equalsIgnoreCase(GuideViewController.allChannelsFavoritesIdentifier)) {
                spinnerFavorites.setSelected(false);
            } else {
                spinnerFavorites.setSelected(true);
            }
            AbsintheViewControllerFactory.getGuideController().setFavourites(favid);

            guideInfoSelectedFavoriteList.setText(name);
        } else {
            AbsintheViewControllerFactory.getGuideController().setFavoriteListInitialisation(false);
            guideInfoSelectedFavoriteList.setText(getActivity().getResources().getString(R.string.FILTER_FAVORITE_ALL_CHANNELS));
        }
    }
}