Android-scrollview Add hint arrow (arrows)

ScrollView Add hint arrow (arrows)

This address: Http://blog.csdn.net/caroline_wendy

In the scrollview sliding function , you need to give the user a hint, you can swipe, you can add two arrows.

Custom ScrollView, create listener Iscrollstatelistener Interface:

    Private Iscrollstatelistener Scrollstatelistener;    public void Setscrollstatelistener (Iscrollstatelistener listener) {        Scrollstatelistener = listener;    }    Public interface Iscrollstatelistener {        void Onscrollmostleft ();        void Onscrollfrommostleft ();        void Onscrollmostright ();        void Onscrollfrommostright ();    }

When listening to the swipe, call the listener Slide Event (onscrollchanged)：

    @Override    protected void onscrollchanged (int l, int t, int oldl, int Oldt) {        super.onscrollchanged (L, T, OLDL, old t);        if (Scrollstatelistener! = null) {            if (L = = 0) {                scrollstatelistener.onscrollmostleft ();            } else if (Oldl = = 0) {                scrollstatelistener.onscrollfrommostleft ();            }            int mostrightl = this.getchildat (0). GetWidth ()-getwidth ();            if (l >= mostrightl) {                scrollstatelistener.onscrollmostright ();            } else if (Oldl >= mostrightl && L < Mostrightl) {                scrollstatelistener.onscrollfrommostright ();}}    }

When using Slide BarWhen, give Monitoring Events, passing a specific transaction:

        Final ImageView Leftarrow = (ImageView) View.findviewbyid (R.id.doctor_gather_imageview_leftarrow);        Final ImageView RightArrow = (ImageView) View.findviewbyid (R.id.doctor_gather_imageview_rightarrow);        Autohorizontalscrollview ScrollView = (autohorizontalscrollview) View.findviewbyid (R.id.doctor_gather_scrollview); Scrollview.setscrollstatelistener (New Autohorizontalscrollview.iscrollstatelistener () {@Override PU                Blic void Onscrollmostleft () {log.e (DEBUG + TAG, "left" of the slider bar);                Leftarrow.setvisibility (view.invisible);            Rightarrow.setvisibility (view.visible);                } @Override public void Onscrollfrommostleft () {LOG.E (Debug+tag, "slider left leftmost");                Leftarrow.setvisibility (view.visible);            Rightarrow.setvisibility (view.visible); } @Override public void Onscrollmostright () {LOG.E (Debug+tag, "slidingTo the right of the article);                Leftarrow.setvisibility (view.visible);            Rightarrow.setvisibility (view.invisible);                } @Override public void Onscrollfrommostright () {LOG.E (Debug+tag, "slider left rightmost");                Leftarrow.setvisibility (view.visible);            Rightarrow.setvisibility (view.visible); }        });

can be.
Reference: Http://stackoverflow.com/questions/9062227/how-to-set-images-for-scrollview-instead-of-fading-edges

Android-scrollview Add hint arrow (arrows)