Question

这是我的代码，我尝试在我的Sqlite数据库上执行随机查询。

我最终总是使用相同的值!!

请有人告诉我方向吗？

Thans！

    int i2=gerRank(livello);
    Random r = new Random();
    int i1 = r.nextInt(i2);
    Toast.makeText(this,Integer.toString(i1),Toast.LENGTH_SHORT).show();
    Cursor parolaCursor = db.getReadableDatabase().rawQuery(
            "SELECT _id, english, korean, difficulty FROM ordinato WHERE difficulty < "
                    + Integer.toString(i1)+ " ORDER BY _id", null);

    parolaCursor.moveToFirst();

Answer 1

好的，解决了这个问题，请看新代码：

int i2=gerRank(livello);
    Random r = new Random();
    int i1 = r.nextInt(i2);
    Cursor parolaCursor = db.getReadableDatabase().rawQuery(
            "SELECT _id, english, korean, difficulty FROM ordinato WHERE difficulty < "
                    + Integer.toString(i1)+ " ORDER BY difficulty DESC", null);
    parolaCursor.moveToFirst();

诀窍是ORDER BY难度DESC

随机值的Sqlite查询，为什么我总是得到相同的结果？

1 个答案: