Question

I want to create a way users can select options like the image below

Right now am doing the following

public static class CategoriesDialogFragment extends SherlockDialogFragment {

    public static CategoriesDialogFragment newInstance(int title) {
        CategoriesDialogFragment frag = new CategoriesDialogFragment();
        Bundle args = new Bundle();
        args.putInt("title", title);
        frag.setArguments(args);
        return frag;
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        int title = getArguments().getInt("title");

        return new AlertDialog.Builder(getActivity())
                .setIcon(R.drawable.alert_dialog_icon)
                .setTitle(title)
                .setMultiChoiceItems(_categories, _selections,
                        new DialogSelectionClickHandler())
                .setPositiveButton(R.string.alert_dialog_ok,
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog,
                                    int whichButton) {
                                ((MainActivity) getActivity())
                                        .doPositiveClick();
                            }
                        }).create();

        /*
         * .setNegativeButton(R.string.alert_dialog_cancel, new
         * DialogInterface.OnClickListener() { public void
         * onClick(DialogInterface dialog, int whichButton) {
         * ((MainActivity) getActivity()) .doNegativeClick(); } })
         */
    }

    public class DialogSelectionClickHandler implements
            DialogInterface.OnMultiChoiceClickListener {
        public void onClick(DialogInterface dialog, int clicked,
                boolean selected) {
            // Log.i("ME", _options[clicked] + " selected: " + selected);
        }
    }

}

But i want to add ALL option like the image. So i think i will have to build a custom Dialog. Can i still extend the native setMultiChoiceItems so that it will reduce my handling of the code.

Answer 1

You could probably use the setCustomTitle() method of the AlertDialog.Builder class and construct your own title which has the title text and also the all CheckBox, something like this:

new AlertDialog.Builder(getActivity())
                .setIcon(R.drawable.alert_dialog_icon)
                .setTitle(title)
                .setCustomTitle(getLayoutInflater().inflate(R.layout.custom_title, null));

where R.layout.custom_title is:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <TextView
        android:id="@+id/textView1"
        style="?android:attr/textAppearanceLarge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Dialog title"
        android:textColor="#ffffff" />

    <TextView
        android:id="@+id/all"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="All"
        android:textColor="#ffffff" />

    <CheckBox
        android:id="@+id/checkBox1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

Other style tweaks should be made to make it look better.
But seeing the entire dialog layout you may want to go with a custom Dialog class, for which the setMultiChoice() method will not be available(but in the end it will be easy to replicate).