CursorIndexOutOfBoundsException

CursorIndexOutOfBoundsException: Index 118 requested, with a size of 118
在数据库中是有第118号元素，但如果调用118号元素就会出错，minNumber是上界，maxNumber是下界，求解？

 float maxBuffer = 0;
        float minBuffer =999999999;
        chemicalCursor.moveToPosition(this.minNumber);
        for(int i=this.minNumber;i<=this.maxNumber;i++) {
            if (chemicalCursor.moveToFirst()) {
                float numberBuffer = chemicalCursor.getFloat(chemicalCursor.getColumnIndex(this.columnName));
            Log.d("Buffer",numberBuffer+"");
            if(numberBuffer>maxBuffer){
                maxBuffer = numberBuffer;
                Log.d("Buffer"," "+maxBuffer);
            }
            if(numberBuffer<minBuffer){
                minBuffer = numberBuffer;
                Log.d("Buffer"," "+minBuffer);
            }}

http://blog.csdn.net/cnnumen/article/details/7744348

先看看你的cursor到底读出了哪些数据，数据库中有，但是你的cursor不一定读取到这么多数据了

size是 118 下标最大是117 是0-117，上述如果minNumber为0 ，maxNumber为117 就可以了