java - 如何在Android上在特定条件下停止循环并将数据插入数组

Question

我想在满足条件时停止循环这是代码:

for (i = 0; i < 8 ; i++) {
    Cursor r = db.rawQuery("SELECT _id, key_foodstuff, key_calorie, key_carbohydrate, key_fat, key_protein FROM (food INNER JOIN categories ON food.key_nocategory = categories.nocategories) WHERE key_type!='secondary' AND _id!=164 ORDER BY RANDOM() LIMIT 1", null);       

    if(r.moveToFirst())
    {
            morning_food[i] = r.getString(0);
            Log.v("_id : ", morning_food[i]);
            morning_food[c] = r.getString(2);
            Log.v("Kalori : ", morning_food[c]);
            sumOfCalorie = sumOfCalorie + Double.parseDouble(morning_food [c]);
            Log.v("Sum : ", "" + sumOfCalorie);

            if (sumOfCalorie == morning_cal || sumOfCalorie >= morning_cal-(morning_cal*0.1) && sumOfCalorie <= morning_cal+(morning_cal*0.1))
            {
                break;
            }


    }

有什么解决办法吗？这不行……谢谢。

Answer 1

if(r.moveToFirst())..您查看第一行 8 次却从未移至下一行？