Google Plus ListView Animation

The Google Plus app for Android has a nice ListView animation when scrolling down in a list, ListView items slide up into place. This transition only happens on list items you haven’t viewed yet and only in the scroll down direction, not in the scroll up direction.

Here’s how you can achieve this effect:

public class YourAdapter extends ArrayAdapter {

    private int mLastPosition = -1;
    // ... constructor, etc.

    public View getView(int position, View convertView, ViewGroup parent) {
        // Do all your drawing, ViewHolder stuff, etc.

        // animate the item
        TranslateAnimation animation = null;
        if (position > mLastPosition) {
            animation = new TranslateAnimation(
                0.0f, Animation.RELATIVE_TO_SELF, 0.0f,
                Animation.RELATIVE_TO_SELF, 1.0f,
                Animation.RELATIVE_TO_SELF, 0.0f);

            mLastPosition = position;

        return convertView;