有关安卓onOptionsItemSelected中显示已取出的SharedPerferences中的值

Question

 public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.goOn:
                Toast.makeText(this, "继续游戏", Toast.LENGTH_SHORT).show();
                break;
            case R.id.newGame:
                Toast.makeText(this, "新建游戏", Toast.LENGTH_SHORT).show();
                reset();
                //清除历史最高分
                best_score = 0;
                textBestScore.setText("\n"+best_score);
                break;
            case R.id.bestScore:
//我想点击这个然后弹出我的历史最高分记录
             break;
            case R.id.quit:
                finish();
                break;
            case R.id.action_settings:showAbout();break;
            default:
        }
        return super.onOptionsItemSelected(item);
    }下面是我取出最高分xml文件的方法
 public Score getBestScore() throws ParseException {
        Score rs=new Score();
        SharedPreferences preferences=getSharedPreferences("score_data",MODE_PRIVATE);
        rs.setName(preferences.getString("name","无名氏"));
        rs.setScore(preferences.getInt("score",0));
        DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date time =df.parse(preferences.getString("time",new Date().toString()));
        rs.setTime(time);
        return rs;
    }
求大佬指点一下！

Answer 1

默认是 0 分。首先要有 set 后，然后 get 才能获取到之前 set 的分数。