SharedPreferences 的使用

1、用SharedPreferences存数据

SharedPreferences sharedPreferences = getSharedPreferences("guide", MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
            editor.putString("num", "first");
            editor.commit();

2、获取SharedPreferences中存放的数据

SharedPreferences sharedPreferences = getSharedPreferences("guide", MODE_PRIVATE);
        String str = sharedPreferences.getString("num", "");