android:how to make infinite scrollview with endless scrolling

Question

I want a code to make the ScrollView show the same images with endless scrolling over and over.

This is excelent for the layout and I want to know what

Answer 1

FoamGuy's answer is correct. But in order to make the list go backwards, as in an infinite carrousel, I also trick the system by setting the default element to be Integer.MAX_VALUE/2 by calling:

listView.setSelection( Integer.MAX_VALUE/2 );

It is pretty unlikely the user will scroll back 1 billion elements back, which makes the effect of infinite carrousel in both directions.

I also have some other modifications to the BaseAdapter custom implementation:

@Override
public Object getItem(int position) {
    if ( model.getSize()==0 ) {
        return null;
    }

    // mod the list index to the actual element count
    return model.getElementAtPosition( position%model.getSize() );
}

@Override
public long getItemId(int position) {
    if ( model.getSize()==0 ) {
        return -1;
    }

    // same as above
    return model.getElementAtPosition( position%model.getSize() ).id;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    if ( model.getSize()==0 ) {
        return null;
    }

    // also make sure to point to the appropriate element in your model otherwise you 
    // would end up building millions of views.
    position%=model.getSize();

    View front= convertView;

    if ( convertView==null ) {
        // inflate/build your list item view
    }

    ...
}

This way the list will spin around like in a carousel w/o extra memory allocation for unneeded views.