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POAndroid SQLite CursorWindowAllocationException crash
 

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    <p>I have a situation where my program crashes when I make a number of cursor.moveToNext() requests. The error message reads:</p> <pre><code>android.database.CursorWindowAllocationException: Cursor window allocation of 2048 kb failed. # Open Cursors=773 (# cursors opened by this proc=773) at android.database.CursorWindow.&lt;init&gt;(CursorWindow.java:112) at android.database.CursorWindow.&lt;init&gt;(CursorWindow.java:100) at android.database.AbstractWindowedCursor.clearOrCreateWindow(AbstractWindowedCursor.java:198) at android.database.sqlite.SQLiteCursor.clearOrCreateWindow(SQLiteCursor.java:364) at android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:162) at android.database.sqlite.SQLiteCursor.getCount(SQLiteCursor.java:156) at android.database.AbstractCursor.moveToPosition(AbstractCursor.java:161) at android.database.AbstractCursor.moveToNext(AbstractCursor.java:209) at net.cunniman.teacherplannerlite.SchoolClassDataSource.getClassForDayView(SchoolClassDataSource.java:173) at net.cunniman.teacherplannerlite.DayView.getSchoolClasses(DayView.java:200) at net.cunniman.teacherplannerlite.DayView.displayDate(DayView.java:176) at net.cunniman.teacherplannerlite.DayView.plusDay(DayView.java:287) at net.cunniman.teacherplannerlite.DayView.onClick(DayView.java:93) at android.view.View.performClick(View.java:3565) at android.view.View$PerformClick.run(View.java:14165) at android.os.Handler.handleCallback(Handler.java:605) at android.os.Handler.dispatchMessage(Handler.java:92) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4514) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747) at dalvik.system.NativeStart.main(Native Method) try { this.openForRead(); for (int day_counter = 0; day_counter &lt; DAY_PERIOD.length/2; day_counter++) { Cursor cursor = database.rawQuery ("SELECT " + NAME + " FROM " + TABLE_NAME + " WHERE " + DAY_PERIOD[day_counter * 2] + " = '" + day + "' AND " + DAY_PERIOD[day_counter * 2 + 1] + " = " + Integer.toString(period), null); while (cursor.moveToNext()) { String name = cursor.getString(0); sc.setName(name); } } finally { this.close(); } </code></pre> <p>Does anyone know what might be causing this - seems like a memory leak (maybe?) but is there a way I can prevent it from happening?</p> <p>Thanks</p>
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    1. COyou might not be closing all the cursor
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    2. COYou are not closing all cursors. After the while loop, add cursor.close. You are also create a lot of Cursor objects. I would suggest to review you code. It's better to do a "bigger" SQL, fetching all data, and then loop over that.
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    3. COThanks Tom, that's really helpful on both parts and makes sense. I'll try implementing tomorrow.
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