ContentResolver.query：CursorIndexOutOfBoundsException

Question

I'm using a function from Microsoft face recognition sample App.

// Get the rotation angle of the image taken.
private static int getImageRotationAngle(
        Uri imageUri, ContentResolver contentResolver) throws IOException {
    int angle = 0;
    Cursor cursor = contentResolver.query(imageUri,
            new String[] { MediaStore.Images.ImageColumns.ORIENTATION }, null, null, null);
    if (cursor != null) {
        if (cursor.getCount() == 1) {
            cursor.moveToFirst();
            angle = cursor.getInt(0);
        }
        cursor.close();
    } else {
        ExifInterface exif = new ExifInterface(imageUri.getPath());
        int orientation = exif.getAttributeInt(
                ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);

        switch (orientation) {
            case ExifInterface.ORIENTATION_ROTATE_270:
                angle = 270;
                break;
            case ExifInterface.ORIENTATION_ROTATE_180:
                angle = 180;
                break;
            case ExifInterface.ORIENTATION_ROTATE_90:
                angle = 90;
                break;
            default:
                break;
        }
    }
    return angle;
}

It works fine in their App, but it throws android.database.CursorIndexOutOfBoundsException: Requested column: 0, # of columns: 0 in the line:

angle = cursor.getInt(0);

The image comes from camera and I have verified that the imageUri is correct. However, the count of cursor is 1, and I can't get anything from it. Does anyone know why?

Update:

content of dump cursor to String

>>>>> Dumping cursor android.content.ContentResolver$CursorWrapperInner@d830286
                                                    0 {
                                                       _display_name=IMG_344595033.jpg
                                                       _size=3335837
                                                    }
                                                    <<<<<

In the sample App, they used Uri to process the temporarily saved taken photo, but I used file provider since I have SDK 25. It seems that the cursor should be null, but the file provider makes it contains something.

Solved:

I replaced the getCount by getColumnCount, in case that the cursor is empty but getCount returns 1.

Answer 1

Id first check the column count by calling getColumnCount() on the cursor. Also you can change the way you are iterating through the cursor by looking at this example .

Answer 2

In case if some one missed the answer in the questing as I'm, I put this here to save time for other not attentive people. If you use custom FileProvider just replace the getCount to getColumnCount , in case that the cursor is empty but getCount returns 1.