完成尚未停用或关闭非致命错误的游标

Question

我正在获得这段代码的"完成一个尚未停用或关闭的光标"错误.该代码用于填充列表视图.

因为它是一个非致命的错误,没有崩溃,所有似乎都工作正常..但我不喜欢错误.

如果我关闭此代码末尾的光标......列表视图保持空白.如果我在onStop上关闭光标,我会得到同样的错误.

我该如何解决？？

private void updateList() { 
        DBAdapter db = new DBAdapter(this); 
        db.open(); 
            //load all waiting alarm 
            mCursor=db.getTitles("state<2"); 
            setListAdapter(new MyCursorAdapter(this, mCursor)); 
            registerForContextMenu(getListView()); 
            db.close(); 
        } 


error : 


E/Cursor  ( 2318): Finalizing a Cursor that has not been deactivated 
or closed. database = /data/data/xxxxxxxxxxxxxxx.db, table = alerts, 
query = SELECT _id, alert_id, 
E/Cursor  ( 2318): 
android.database.sqlite.DatabaseObjectNotClosedException: Application 
did not close the cursor or database 
object that was opened here 
E/Cursor  ( 2318):      at 
android.database.sqlite.SQLiteCursor.<init>(SQLiteCursor.java:210) 
E/Cursor  ( 2318):      at 
android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDr­iver.java: 
53) 
E/Cursor  ( 2318):      at 
android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.j­ava: 
1345) 
E/Cursor  ( 2318):      at 
android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java­: 
1229) 
.... 
.... 

Answer 1

如果你关闭Cursorin onStop()或者,你不应该收到该消息onDestroy().请再试一次.或者,从您的查询中startManagingCursor()获取后调用Cursor,Android将Cursor自行关闭.

Answer 2

斯科特,

我遇到了和你一样的问题.在关闭数据库之前,即"db.close()",确保首先关闭游标,即"mCursor.close()"

像这样:

private void updateList()
{ 
    DBAdapter db = new DBAdapter(this);
    db.open();

    //load all waiting alarm
    mCursor=db.getTitles("state<2"); 
    setListAdapter(new MyCursorAdapter(this, mCursor)); 
    registerForContextMenu(getListView()); 

    // Let's close the cursor.
    mCursor.close();
    db.close(); 
} 

您提到如果关闭光标,列表视图将保持为空.我建议你将信息传递给一个类并复制它(分配内存)然后关闭光标.