android sqlite中的数据库未关闭错误

-1

我的整个应用程序运行良好，但是当我看到logcat时，我可以看到像数据库这样的错误消息即使在我用关闭语句MyDBinstance.close（）关闭数据库后也没有关闭。他们为什么再来？他们是否对我的申请有害？android sqlite中的数据库未关闭错误

11-23 23:09:03.593: E/SQLiteDatabase(30762): close() was never explicitly called on database '/data/data/dlp.android.digichronicle/databases/widget.sqlite' 
11-23 23:09:03.593: E/SQLiteDatabase(30762): android.database.sqlite.DatabaseObjectNotClosedException: Application did not close the cursor or database object that was opened here 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at android.database.sqlite.SQLiteDatabase.<init>(SQLiteDatabase.java:1943) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:1007) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:986) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:962) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at dlp.android.digichronicle.DBHandandler.openDataBase(DBHandandler.java:117) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at dlp.android.digichronicle.inter.FetchingData(inter.java:95) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at dlp.android.digichronicle.inter.onCreate(inter.java:29) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at android.app.Activity.performCreate(Activity.java:4465) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at android.app.ActivityThread.access$600(ActivityThread.java:123) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at android.os.Handler.dispatchMessage(Handler.java:99) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at android.os.Looper.loop(Looper.java:137) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at android.app.ActivityThread.main(ActivityThread.java:4424) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at java.lang.reflect.Method.invokeNative(Native Method) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at java.lang.reflect.Method.invoke(Method.java:511) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
11-23 23:09:03.593: E/SQLiteDatabase(30762): at dalvik.system.NativeStart.main(Native Method) 
11-23 23:09:03.752: I/dalvikvm(30762): threadid=3: reacting to signal 3 
11-23 23:09:03.811: I/dalvikvm(30762): Wrote stack traces to '/data/anr/traces.txt' 
11-23 23:09:16.182: I/System.out(30762): got from accounts1.0exp1.0 
11-23 23:09:16.332: I/System.out(30762): Bundle[mParcelledData.dataSize=52]

来源

2012-11-23 user1848183

请给你的代码。 – arjoan

你关闭了你的光标吗？ – Ahmad

是的，您应该在使用后关闭所有数据集。在使用sqlite数据集/游标的每种方法上使用try..finally块。 – dougcunha

你可能想要做这样的，以确保您始终关闭游标：

Cursor c = null; 
try { 

    c = somehowCreateACursor(); 

} finally { 

    if(c != null) { 
     c.close(); 
    } 

}

来源

2012-11-23 17:58:25

谢谢先生，我现在有另一个问题。如何在一个sql查询中使用sum（）和BETWEEN，在日期之间作出 – user1848183

@ user1848183你可以调用db.rawQuery并将它传递给它你的SQL字符串 –

其实没有必要关闭数据库。即使事实上会产生上述例外，但它绝不会以任何方式伤害应用程序。

来源

2012-11-23 18:28:01 Priety

你应该**总是**在你完成使用时关闭你的数据库它释放分配的内存并拥有更快的应用程序。 – Sam

感谢您的支持:) – user1848183

android sqlite中的数据库未关闭错误

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