title: attempt to re-open an already-closed object: SQLiteDatabase
body: <p>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?</p>
  
  <pre><code>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
  </code></pre>