有一个在数据库中单行索引,需要收集分数。
23
45
84
56
然后在收集之后相加。
String[] projection2 = {BorrowMeTable.COLUMN_CREDIT_SCORE };
Cursor databaseCursor2 = getContentResolver().query(uri, projection2,
null, null, null);
int number = 0;
if (databaseCursor2 != null) {
while (databaseCursor2.isAfterLast() == false) {
databaseCursor2.moveToFirst();
number = number + databaseCursor2.getInt(databaseCursor2
.getColumnIndexOrThrow(BorrowMeTable.COLUMN_CREDIT_SCORE));
}
}
运行之后代码就会崩溃,不知道为什么?