android - AlertDialog 不在列表中显示分隔符

Question

我有这门课:

public class PageDetailInfoView extends FrameLayout {

//few constructors and methods

//method to show an AlertDialog with a list
private void openDialog(){

    List<String> mTags = new ArrayList<String>();
    mTags.add("Item1");
    mTags.add("Item2");
    mTags.add("Item3");
    mTags.add("Item4");
    mTags.add("Item5");
    mTags.add("Item6");

    final CharSequence[] tags = mTags.toArray(new String[mTags.size()]);
    AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
    builder.setTitle("Title");
    builder.setItems(tags, new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int item) {
        //do something
        }
    });

    Dialog alertDialogObject = builder.create();
    alertDialogObject.show();


}

警报对话框在调用 openDialog() 后打开，但问题是它不显示项目之间的分隔线。我想得到这个:
http://2.bp.blogspot.com/-i00d8VG6WsQ/UrGIeyb-8II/AAAAAAAAHwA/8MPWP5qrQ78/s500/alertdialog-with-simple-listview.png

事实上，我明白了，但没有灰色分隔线。
知道为什么吗？

Answer 1

将 AlertDialog 列表项分隔线颜色更改为:

AlertDialog alertDialogObject = dialogBuilder.create();
ListView listView=alertDialogObject.getListView();  
listView.setDivider(new ColorDrawable(Color.BLUE)); // set color
listView.setDividerHeight(2); // set height 
alertDialogObject.show();