尝试重新打开一个已经关闭的对象：SQLiteDatabase [英] attempt to re-open an already-closed object: SQLiteDatabase

问题描述

我在我的logcat中得到这些错误，当我试图更改我的项目构建目标到4.1 google API，在项目属性。我试图修复项目属性和清理项目，但没有成功。有什么问题？

I get these errors in my logcat when i tried to change my project build target to 4.1 google API, in Project Properties. I've tried to fix project properties and clean project, but with no success. What's the problem?

10-07 15:13:34.839: E/Trace(731): error opening trace file: No such file or directory (2)
10-07 15:13:35.259: I/SQLiteConnectionPool(731): The connection pool for /data/data/hr.punctum.LociranjePonudaProizvoda/databases/proizvodidb has been closed but there are still 1 connections in use.  They will be closed as they are released back to the pool.
10-07 15:13:35.259: D/AndroidRuntime(731): Shutting down VM
10-07 15:13:35.259: W/dalvikvm(731): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
10-07 15:13:35.278: E/AndroidRuntime(731): FATAL EXCEPTION: main
10-07 15:13:35.278: E/AndroidRuntime(731): java.lang.RuntimeException: Unable to start activity ComponentInfo{hr.punctum.LociranjePonudaProizvoda/hr.punctum.LociranjePonudaProizvoda.ListaProizvoda}: java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteDatabase: /data/data/hr.punctum.LociranjePonudaProizvoda/databases/proizvodidb
10-07 15:13:35.278: E/AndroidRuntime(731):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
10-07 15:13:35.278: E/AndroidRuntime(731):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
10-07 15:13:35.278: E/AndroidRuntime(731):  at android.app.ActivityThread.access$600(ActivityThread.java:130)
10-07 15:13:35.278: E/AndroidRuntime(731):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
10-07 15:13:35.278: E/AndroidRuntime(731):  at android.os.Handler.dispatchMessage(Handler.java:99)
10-07 15:13:35.278: E/AndroidRuntime(731):  at android.os.Looper.loop(Looper.java:137)
10-07 15:13:35.278: E/AndroidRuntime(731):  at android.app.ActivityThread.main(ActivityThread.java:4745)
10-07 15:13:35.278: E/AndroidRuntime(731):  at java.lang.reflect.Method.invokeNative(Native Method)
10-07 15:13:35.278: E/AndroidRuntime(731):  at java.lang.reflect.Method.invoke(Method.java:511)
10-07 15:13:35.278: E/AndroidRuntime(731):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
10-07 15:13:35.278: E/AndroidRuntime(731):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-07 15:13:35.278: E/AndroidRuntime(731):  at dalvik.system.NativeStart.main(Native Method)
10-07 15:13:35.278: E/AndroidRuntime(731): Caused by: java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteDatabase: /data/data/hr.punctum.LociranjePonudaProizvoda/databases/proizvodidb
10-07 15:13:35.278: E/AndroidRuntime(731):  at android.database.sqlite.SQLiteClosable.acquireReference(SQLiteClosable.java:55)
10-07 15:13:35.278: E/AndroidRuntime(731):  at android.database.sqlite.SQLiteDatabase.endTransaction(SQLiteDatabase.java:520)
10-07 15:13:35.278: E/AndroidRuntime(731):  at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:263)
10-07 15:13:35.278: E/AndroidRuntime(731):  at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
10-07 15:13:35.278: E/AndroidRuntime(731):  at hr.punctum.LociranjePonudaProizvoda.ListaProizvoda.onCreate(ListaProizvoda.java:27)
10-07 15:13:35.278: E/AndroidRuntime(731):  at android.app.Activity.performCreate(Activity.java:5008)
10-07 15:13:35.278: E/AndroidRuntime(731):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
10-07 15:13:35.278: E/AndroidRuntime(731):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
10-07 15:13:35.278: E/AndroidRuntime(731):  ... 11 more

推荐答案

p>确保你只使用一个 SQLiteDatabase 的实例。我猜你已经实例化了多个实例，Android正在抱怨结果。

Make sure you are only ever working with one instance of SQLiteDatabase. I'm guessing that you have instantiated multiple instances and Android is complaining as a result.

您应该看看这个 博客帖子。

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