Databases
StackOverflow2013
Postsdbo
POTimerTask causing "Access closed cursor" force close
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POTimerTask causing "Access closed cursor" force close
    primarykey
    data
    text
    <p>I have a TimerTask that is causing my app to crash when I go to a different Intent. Here is the error:</p> <pre><code>06-06 02:45:54.884: E/AndroidRuntime(602): FATAL EXCEPTION: main 06-06 02:45:54.884: E/AndroidRuntime(602): android.database.StaleDataException: Access closed cursor 06-06 02:45:54.884: E/AndroidRuntime(602): at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:217) 06-06 02:45:54.884: E/AndroidRuntime(602): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:41) 06-06 02:45:54.884: E/AndroidRuntime(602): at com.myapp.ExerciseActivity$TickClass$1.run(ExerciseActivity.java:221) 06-06 02:45:54.884: E/AndroidRuntime(602): at android.os.Handler.handleCallback(Handler.java:587) 06-06 02:45:54.884: E/AndroidRuntime(602): at android.os.Handler.dispatchMessage(Handler.java:92) 06-06 02:45:54.884: E/AndroidRuntime(602): at android.os.Looper.loop(Looper.java:123) 06-06 02:45:54.884: E/AndroidRuntime(602): at android.app.ActivityThread.main(ActivityThread.java:3683) 06-06 02:45:54.884: E/AndroidRuntime(602): at java.lang.reflect.Method.invokeNative(Native Method) 06-06 02:45:54.884: E/AndroidRuntime(602): at java.lang.reflect.Method.invoke(Method.java:507) 06-06 02:45:54.884: E/AndroidRuntime(602): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 06-06 02:45:54.884: E/AndroidRuntime(602): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 06-06 02:45:54.884: E/AndroidRuntime(602): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>Now here is the code for the TimerTask:</p> <pre><code>public class TickClass extends TimerTask { private int columnIndex; @Override public void run() { runOnUiThread(new Runnable() { @Override public void run() { if (cursor != null) { if (_index == 1) { columnIndex = cursor.getColumnIndex(MySQLiteHelper.COLUMN_IMAGE_2); _index = 2; } else { columnIndex = cursor.getColumnIndex(MySQLiteHelper.COLUMN_IMAGE_1); _index = 1; } String image_1 = cursor.getString(columnIndex); image_1 = image_1.replace(".png", ""); int resourceId = getResources().getIdentifier(getPackageName() + ":drawable/" + image_1, null, null); image_1_view.setImageDrawable(getResources().getDrawable(resourceId)); } } }); } } </code></pre> <p>All it does is animate a PNG.</p> <p>Notice how I have added the <code>if (cursor != null)</code> conditional statement, which didn't fix it. I am not sure how to fix this, is it because it is running on the UI thread, so even though I've navigated away from the Activity, it is still running, but the cursor no longer exists since it is tied in with the Activity?</p> <p>EDIT:</p> <p>I've fixed the force close by cancel()ing the TimerTask onPause(). However, now when I return to the Activity, the image is no longer animated. Any thoughts?</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USscarhand
    1. USscarhand
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. CO`cursor != null` just tell whether cursor has been initialized or not, closed `cursor` has nothing to do with it, you are definitely accessing a `cursor` that has been already **closed**
      singulars
      1. POTimerTask causing "Access closed cursor" force close
      1. USMuhammad Babar
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload