Easy quick return. No need for dodgy observable ListView hacks.

QuickReturn.java

public class QuickReturn {
    private static final String TAG = "QuickReturn";

    protected GestureDetectorCompat mGestureDetector;
    private Context mContext;
    private View mQuickReturnView;
    private View mTargetView;

    public QuickReturn(Context context, View targetView, View quickReturnView) {
        mContext = context;
        mQuickReturnView = quickReturnView;
        mTargetView = targetView;

        mGestureDetector = new GestureDetectorCompat(context, new GestureDetector.SimpleOnGestureListener() {

            @Override
            public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
                mQuickReturnView.setTranslationY(Math.max(Math.min(mQuickReturnView.getTranslationY() + distanceY, mQuickReturnView.getHeight()), 0));

                return false;
            }

            @Override
            public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
                // On up
                if (velocityY > 0) {
                    // Show: Animate to 0
                    mQuickReturnView.animate().translationY(0).setDuration(100).start();
                } else {
                    // Hide: Animate to -height
                    mQuickReturnView.animate().translationY(mQuickReturnView.getHeight()).setDuration(100).start();
                }

                return false;
            }

        });

        targetView.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                if (event.getAction() == MotionEvent.ACTION_UP || event.getAction() == MotionEvent.ACTION_CANCEL) {
                    hideQuickReturnViewIfNeeded();
                }

                return mGestureDetector.onTouchEvent(event);
            }
        });
    }

    protected void showQuickReturnView() {
        // Show: Animate to 0
        mQuickReturnView.animate().translationY(0).setDuration(100).start();
    }

    protected void hideQuickReturnViewIfNeeded() {
        if (mQuickReturnView.getTranslationY() < mQuickReturnView.getHeight() / 2) {
            showQuickReturnView();
        } else {
            hideQuickReturnView();
        }
    }

    protected void hideQuickReturnView() {
        // Hide: Animate to -height
        mQuickReturnView.animate().translationY(mQuickReturnView.getHeight()).setDuration(100).start();
    }

}