我有几个列,分别是_id,description.what,amount( int ),category,我正在尝试获取一个特定类别的金额之和,并将它们存储在int中。-10 03:55:29.828: E/AndroidRuntime(10229): FATAL EXCEPTION: main
10-10 03:55:29.828: E/AndroidRuntime-10 03:55:29.828: E/AndroidRuntime(10229): at android.os.Looper.loop(Looper.jav