title: SQLiteDatabase android IllegalStateException
body: <p>i have a problem when i'm using the Sqlite of android. The log show me that :</p>
  
  <pre><code>SQLiteConnectionPool(1730): **The connection pool for /data/data/dev.xx.xx/databases/XX has been closed but there are still 1 connections in use.  They will be closed as they are released back to the pool.**
  08-02 14:15:41.490: D/AndroidRuntime(1730): Shutting down VM
  08-02 14:15:41.490: W/dalvikvm(1730): threadid=1: thread exiting with uncaught exception (group=0xb4d74908)
  08-02 14:15:41.510: E/AndroidRuntime(1730): FATAL EXCEPTION: main
  08-02 14:15:41.510: E/AndroidRuntime(1730): **java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteDatabase: /data/data/dev.xx.xx/databases/XX**
  08-02 14:15:41.510: E/AndroidRuntime(1730):     at android.database.sqlite.SQLiteClosable.acquireReference(SQLiteClosable.java:55)
  08-02 14:15:41.510: E/AndroidRuntime(1730):     at android.database.sqlite.SQLiteDatabase.endTransaction(SQLiteDatabase.java:520)
  08-02 14:15:41.510: E/AndroidRuntime(1730):     at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:263)
  08-02 14:15:41.510: E/AndroidRuntime(1730):     at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
  08-02 14:15:41.510: E/AndroidRuntime(1730):     at dev.xx.xx.SettingActivity$3.onClick(SettingActivity.java:205)
  08-02 14:15:41.510: E/AndroidRuntime(1730):     at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:166)
  08-02 14:15:41.510: E/AndroidRuntime(1730):     at android.os.Handler.dispatchMessage(Handler.java:99)
  08-02 14:15:41.510: E/AndroidRuntime(1730):     at android.os.Looper.loop(Looper.java:137)
  08-02 14:15:41.510: E/AndroidRuntime(1730):     at android.app.ActivityThread.main(ActivityThread.java:5039)
  08-02 14:15:41.510: E/AndroidRuntime(1730):     at java.lang.reflect.Method.invokeNative(Native Method)
  08-02 14:15:41.510: E/AndroidRuntime(1730):     at java.lang.reflect.Method.invoke(Method.java:511)
  08-02 14:15:41.510: E/AndroidRuntime(1730):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
  08-02 14:15:41.510: E/AndroidRuntime(1730):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
  </code></pre>
  
  <p>This error come when i try to call :</p>
  
  <pre><code>public class DataBase extends SQLiteOpenHelper {
  
  ...
      void addUser(String who, String time, String table, String phone) {
              SQLiteDatabase db = this.getWritableDatabase();
              ContentValues values = new ContentValues();
              values.put(KEY_NAME, who);
              values.put(KEY_PHONE, phone);
              values.put(KEY_TABLE_RES, table);
              values.put(KEY_TIME, time);
              db.insert(TABLE_RESERVATION, null, values);
              db.close(); // Closing database connection
          }
  
  ....
  }
  </code></pre>
  
  <p>I thing it's when the func call that :</p>
  
  <blockquote>
    <p>this.getWritableDatabase()</p>
  </blockquote>