Images in SimpleCursorAdapter

Question

I'm trying to use a SimpleCursorAdapter with a ViewBinder to get an image from the database and put it into my ListView item view. Here is my code:

private void setUpViews() {
    mNewsView = (ListView) findViewById(R.id.news_list);

    Cursor cursor = getNews();
    SimpleCursorAdapter curAdapter = new SimpleCursorAdapter(
            getApplicationContext(), R.layout.cursor_item, cursor,
            new String[] { "title", "content", "image" },
            new int[] { R.id.cursor_title, R.id.cursor_content,
                    R.id.news_image });
    
    ViewBinder viewBinder = new ViewBinder() {
        
        public boolean setViewValue(View view, Cursor cursor,
                int columnIndex) {
            ImageView image = (ImageView) view;
            byte[] byteArr = cursor.getBlob(columnIndex);
            image.setImageBitmap(BitmapFactory.decodeByteArray(byteArr, 0, byteArr.length));
            return true;
        }
    };
    ImageView image = (ImageView) findViewById(R.id.news_image);
    viewBinder.setViewValue(image, cursor, cursor.getColumnIndex("image"));
    curAdapter.setViewBinder(viewBinder);
    mNewsView.setAdapter(curAdapter);
}

I am getting:

android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 60

while executing byte[] byteArr = cursor.getBlob(columnIndex);. Does anyone have an idea what am I doing wrong?

Answer 1

I think the cursor.moveToFirst() has not been called so the cursor is throwing android.database.CursorIndexOutOfBoundsException.

Before using a cursor you should always check is the cursor is empty or not by calling cursor.moveToFirst(). This will also position the cursor at the first position.