Multiple choice alert dialog with custom row layout

Question

I need to create an AlertDialog with multiple choice items but I'm having some trouble trying to set a custom layout file to the internal ListView.

For single choice items I use a constructor that takes a ListAdapter as parameter and this way I can set the proper layout resource for each row:

        builder.setSingleChoiceItems(new ArrayAdapter<String>(getActivity(),
                R.layout.list_item_single_choice_answer, items), checkedItem,
                new DialogInterface.OnClickListener() {

                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        checkedItem = which;
                        toggleEditTextAnswer(checkedItem == (items.length - 1));
                        dialog.dismiss();
                    }
                });

The problem is that there's no constructor for setMultiChoiceItems that accepts a ListAdapter as parameter when creating a multiple choice list.

I need to set a custom layout for each row because I use drawable selectors for setting the row background and text color.

Any ideas?

PS. here is the AlertDialog source code for more information. https://android.googlesource.com/platform/frameworks/base.git/+/android-4.2.2_r1/core/java/android/app/AlertDialog.java

Answer 1

Well, I know I should create a custom Dialog but right now I don't have the time to do it ... so this is how I hacked this problem:

        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        // Set the adapter
        builder.setAdapter(
                new ArrayAdapter<String>(getActivity(),
                        R.layout.list_item_multiple_choice_answer, items), null)
        // Set the action buttons
                .setPositiveButton(android.R.string.ok,
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int id) {
                                dialog.dismiss();
                            }
                        });

        AlertDialog alertDialog = builder.create();

        ListView listView = alertDialog.getListView();
        listView.setAdapter(new ArrayAdapter<String>(getActivity(),
                R.layout.list_item_multiple_choice_answer, items));
        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                CheckedTextView checkedTextView = (CheckedTextView) view;
                checkedItems[position] = !checkedTextView.isChecked();
            }
        });
        listView.setDivider(null);
        listView.setDividerHeight(-1);

        alertDialog.setOnShowListener(new DialogInterface.OnShowListener() {

            @Override
            public void onShow(DialogInterface dialog) {
                setCheckedItems(((AlertDialog) dialog).getListView());
            }
        });

        alertDialog.show();

First I set the adapter with the items and the instead of calling setMultiChoiceItems I get the ListView object from the Dialog and then configure it myself.