android 单选对话框

private String[] intervalArr = new String[] { "1小时", "2小时", "3小时", "4小时","5小时" };                         
             
 
  int timerInterval = (Integer) SPUtils.get(getActivity(),"timerInterval", 0);   //读取sp 回显数据
  new AlertDialog.Builder(getActivity())
                    .setTitle("自动同步间隔")
                    .setSingleChoiceItems(intervalArr, timerInterval,
                            new DialogInterface.OnClickListener() {
                                public void onClick(DialogInterface dialog,
                                        int which) {
                                    SPUtils.put(getActivity(), "timerInterval",
                                            which); // 保存自动更新状态到sp中
                                    tv_timer_interval
                                            .setText(intervalArr[which]);
                                    dialog.dismiss();
                                }
                            }).setNegativeButton("取消", null).show();