这是我调用对话框的方式：

botAddMedicacion.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            DialogFragment fragAddMedic = new AnadirMedicacionFragment();
            fragAddMedic.show(getFragmentManager(),"addMedicacion");
        }
    });

这是AnadirMedicacionFragment代码：

final CharSequence[] items={".NET","J2EE","PHP"};
 
@Override
public Dialog onCreateDialog(Bundle savedInstanceState){
 
    medicSelec = new ArrayList();
 
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    builder.setMessage(R.string.anadir_medicacion);
 
 
    // elementos de la lista
    builder.setMultiChoiceItems(items,null,new DialogInterface.OnMultiChoiceClickListener() {
        @Override
        public void onClick(DialogInterface dialog,int which,boolean isChecked) {
 
            if (isChecked) {
                medicSelec.add(which);
            } else if (medicSelec.contains(which)) {
                medicSelec.remove(Integer.valueOf(which));
            }
 
        }
    });
 
    // boton ok
    builder.setPositiveButton(R.string.anadir,new DialogInterface.OnClickListener(){
        @Override
        public void onClick(DialogInterface dialog,int which) {
 
        }
    });
 
    // boton cancelar
    builder.setNegativeButton(R.string.cancelar,int which) {
 
        }
    });
 
    return builder.create();
}

项目列表在builder.setMultiChoiceItems中传递(items,null […]

它似乎有效,但没有复选框或列表.