我有一个方法返回CharSequence []并且不为空(用日志检查)但不显示在对话框中.
我是否必须初始化boolean []数组;
我没有看到任何错误,所以也许有一些我想念的东西.
我的代码是：

dbManager.open();
final CharSequence[] usrCats = dbManager.getUserCreatedCategories();

dbManager.close();
final boolean[] selections = new boolean[usrCats.length];

   alert = b.setTitle(R.string.remove_category)
            .setMessage(R.string.delete_categories_msg)
            .setMultiChoiceItems(usrCats,selections,new DialogInterface.OnMultiChoiceClickListener(){
             public void onClick(DialogInterface dialog,int which,boolean isChecked){
            }
        })

            .setPositiveButton("Create",new DialogInterface.OnClickListener(){
             public void onClick(DialogInterface dialog,int which){
            }       
    }).create();
  }