My checkbox does not appear in my CheckedTextView

Here is how I setup my checked text view. How come no check box appeared?

I also added this but it had not effect: listView.setChoiceMode(ListView.CHOICE_MO开发者_如何学PythonDE_SINGLE);

 <CheckedTextView
 android:id="@+id/ctv_checktext"
 android:layout_width="fill_parent"
 android:paddingLeft="2px"
 android:paddingRight="2px"
 android:paddingTop="2px"
 android:layout_height="wrap_content"
 />

(I'm answering my own question because it's undocumented in the Android API)

This is not enough:

listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);

You need to include the android:checkMark="?android:attr/listChoiceIndicatorMultiple" or else

 <CheckedTextView
 android:id="@+id/ctv_checktext"
 android:layout_width="fill_parent"
 android:paddingLeft="2px"
 android:paddingRight="2px"
 android:paddingTop="2px"
 android:layout_height="wrap_content"
 android:checkMark="?android:attr/listChoiceIndicatorMultiple"
 />

you can have your own checkbox.xml in drawable folder then you can write it as android:checkMark = "@drawable/checkbox"