Error Cursor.moveToNext

Question

I see a crash report for this time:

Fatal Exception: java.lang.IllegalStateException: Couldn't read row 1127, col 0 from CursorWindow.  Make sure the Cursor is initialized correctly before accessing data from it.
   at android.database.CursorWindow.nativeGetLong(CursorWindow.java)
   at android.database.CursorWindow.getLong(CursorWindow.java:511)
   at android.database.AbstractWindowedCursor.getLong(AbstractWindowedCursor.java:75)
   at android.database.AbstractCursor.moveToPosition(AbstractCursor.java:220)
   at android.database.AbstractCursor.moveToNext(AbstractCursor.java:245)
   at android.database.CursorWrapper.moveToNext(CursorWrapper.java:166)
   at com.anthonymandra.util.ImageUtils.cleanDatabase(SourceFile:381)

Apparently moveToNextfails in the middle of a loop (note, line 1127). The loop deletes entries that represent files that can no longer be found.

final ArrayList<ContentProviderOperation> operations = new ArrayList<>();

try( Cursor cursor = c.getContentResolver().query(Meta.CONTENT_URI, null, null, null, null))
{
    if (cursor == null)
        return;

    final int uriColumn = cursor.getColumnIndex(Meta.URI);
    final int idColumn = cursor.getColumnIndex(BaseColumns._ID);

    while (cursor.moveToNext())
    {
        String uriString = cursor.getString(uriColumn);
        if (uriString == null)  // we've got some bogus data, just remove
        {
            operations.add(ContentProviderOperation.newDelete(
                    Uri.withAppendedPath(Meta.CONTENT_URI, cursor.getString(idColumn))).build());
            continue;
        }
        Uri uri = Uri.parse(uriString);
        UsefulDocumentFile file = UsefulDocumentFile.fromUri(c, uri);
        if (!file.exists())
        {
            operations.add(ContentProviderOperation.newDelete(Meta.CONTENT_URI)
                    .withSelection(getWhere(), new String[]{uriString}).build());
        }
    }
}

c.getContentResolver().applyBatch(Meta.AUTHORITY, operations);

Any idea on how the cursor might crash this way?

Answer 1

, : 1127 ( , ). Cursor / / IPC ContentProvider, , UsefulDocumentFile Android DocumentFile.

, Cursor, , . , Cursor . , , (, 1127 ).

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Answer 2

, srote , java.lang.IllegalStateException

 UsefulDocumentFile file = UsefulDocumentFile.fromUri(c, uri);

Android SQLite 2 , config_cursorWindowSize. , .

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