Question

I am developing a simple Android app which creates a ListView with a checkbox as follows

listAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_multiple_choice,results);
this.setListAdapter(listAdapter);
ListView lv = getListView();
lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);

lv.setOnItemClickListener(new OnItemClickListener(){
    @Override
     public void onItemClick(AdapterView<?> parent, View view, int position,
                        long id) {
           CheckedTextView check = (CheckedTextView)view;
           //The below code needed for running on AVD version 4.2
           if(check.isChecked()) { 
                   // Checkbox checked do something 
            } 
           else { 
                    // Not checked. Do something 
            }
            /* Exact opposite need on Samsung phone running 2.3.6
            if(!check.isChecked()) {
                      // Checkbox checked do something
            }
            else {
             // Not checked. DO something
            } */

This is truly weird. How will the app ever be compatible with both version when they require completely opposite checks?

Please let me know how I can handle this. Any help will be appreciated.

Answer 1

i know the problem, on newer frameworks the onItemClick call before the checkd attribute of the checkbox changed!

i check the checked state of my checkboxes in after item clicking (e.g. on activity close or save button click).

look at list.getCheckedItemPositions()… it will return a SparseBooleanArray you can use!

EDIT: example

public class MyMultiChoiceActivity extends Activity implements View.OnClickListener {

    private ListView list = null;
    private boolean savedSelectionInvalid = true;
    private List<Integer> selectedIds = new ArrayList<Integer>();

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        this.setContentView(R.layout.entry_data_multi_choice_filter);

        //initialize the list
        list = (ListView) findViewById(R.id.list);
        listAdapter = new MyListAdapterClass(this, R.layout.list_item_multiple_choice);
        list.setAdapter(listAdapter);

        //onclick on a item, set the selectaion as invalid
        list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                savedSelectionInvalid = true;
            }
        });

        list.setAdapter(listAdapter);

        //...
    }

    //...

    private void validateChecked() {
        if(savedSelectionInvalid == true) {
            SparseBooleanArray checkedItemlist = list.getCheckedItemPositions();
            selectedIds.clear();
            for (int i=0; i < checkedItemlist.size(); i++){

                if (checkedItemlist.valueAt(i)) {
                    selectedIds.add(a.keyAt(i));
                }
            }
            this.savedSelectionInvalid = false;
        }
    }

    //...

    //this method se
    private void saveAndClose() {
        validateChecked();

        //now you have the selectedIds filled with every checked item key!

        this.finish();
    }
}