SQLite一次性读取过多记录，造成内存溢出OutOfMemoryError

Android 2.3.3 Eclipse Version: 3.7.0 LogCat

LogCat 报错信息：

03-14 13:16:52.033: ERROR/AndroidRuntime(4399): java.lang.OutOfMemoryError 03-14 13:16:52.033: ERROR/AndroidRuntime(4399): at android.database.CursorWindow.getString_native(Native Method) 03-14 13:16:52.033: ERROR/AndroidRuntime(4399): at android.database.CursorWindow.getString(CursorWindow.java:329) 03-14 13:16:52.033: ERROR/AndroidRuntime(4399): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:49) 03-14 13:16:52.033: ERROR/AndroidRuntime(4399): at com.taobao.htc.db.RecordDBHelper.query(RecordDBHelper.java:140) 03-14 13:16:52.033: ERROR/AndroidRuntime(4399): at com.taobao.htc.manage.RecordDBopt.get(RecordDBopt.java:80) 03-14 13:16:52.033: ERROR/AndroidRuntime(4399): at com.taobao.htc.manage.RecordMessage.sendAll(RecordMessage.java:55) 03-14 13:16:52.033: ERROR/AndroidRuntime(4399): at com.taobao.htc.Check.run(Check.java:456) 03-14 13:16:52.033: ERROR/AndroidRuntime(4399): at java.lang.Thread.run(Thread.java:1019)
同时有报错信息

03-14 13:17:24.763: ERROR/CursorWindow(4399): need to grow: mSize = 1048576, size = 37, freeSpace() = 5, numRows = 6974 03-14 13:17:24.773: ERROR/CursorWindow(4399): not growing since there are already 6974 row(s), max size 1048576 03-14 13:17:24.804: ERROR/Cursor(4399): Failed allocating 37 bytes for text/blob at 6973,3

或

03-14 14:00:59.463: ERROR/CursorWindow(4399): need to grow: mSize = 1048576, size = 72, freeSpace() = 18, numRows = 6974 03-14 14:00:59.473: ERROR/CursorWindow(4399): not growing since there are already 6974 row(s), max size 1048576 03-14 14:00:59.543: ERROR/CursorWindow(4399): The row failed, so back out the new row accounting from allocRowSlot 6973 03-14 14:00:59.543: ERROR/Cursor(4399): Failed allocating fieldDir at startPos 0 row 6973

发生错误原因分析：

数据库中Record表的数据较多，大概有两万条，从以上错误信息，可以看出，大约读取到6974条时报错。CursorWindow一次性打开数据太多，造成内存溢出。

解决办法：

先查询Record表的数据量，如果过大，做分批处理，每次处理5000条左右的数据，避免读取更多数据造成内存溢出。