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我發現這個代碼示例在線,但我無法讓它工作。當它運行時,應用程序崩潰。有沒有簡單的解決方案呢?從Android獲取最大的唯一ID SQLite數據庫不工作
public long getMaxID() {
int id = 0;
final String MY_QUERY = "SELECT MAX(_id) AS _id FROM db_table";
Cursor mCursor = mDb.rawQuery(MY_QUERY, null);
if (mCursor.getCount() > 0) {
mCursor.moveToFirst();
id = mCursor.getInt(mCursor.getColumnIndex(MY_QUERY));
}
return id;
}
我logcat的錯誤似乎是:
10-21 07:48:32.704: E/AndroidRuntime(4023): Caused by: java.lang.IllegalStateException: get field slot from row 0 col -1 failed
完美。這工作。真棒。謝謝! – EGHDK