Android and android Official Website

Android and android Official Website
ScrollView add prompt Arrow (Arrow)

Address: http://blog.csdn.net/caroline_wendy

InSlide function of ScrollView, You need to prompt the user, you can slide, you can add two arrows.

Customize ScrollView and create listenerIScrollStateListenerInterface:

    private IScrollStateListener scrollStateListener;    public void setScrollStateListener(IScrollStateListener listener) {        scrollStateListener = listener;    }    public interface IScrollStateListener {        void onScrollMostLeft();        void onScrollFromMostLeft();        void onScrollMostRight();        void onScrollFromMostRight();    }

Call the listener when the listener slides. OnScrollChanged):

    @Override    protected void onScrollChanged(int l, int t, int oldl, int oldt) {        super.onScrollChanged(l, t, oldl, oldt);        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();            }        }    }

In use SlideTo Listen to eventsTo pass specific transactions:

Final ImageView leftArrow = gradient rows); final ImageView rightArrow = export tor_gather_imageview_rightarrow); AutoHorizontalScrollView scrollView = export tor_gather_scrollview); scrollView. setScrollStateListener (new AutoHorizontalScrollView. IScrollStateListener () {@ Override public void onScrollMostLeft () {Log. e (DEBUG + TAG, "leftmost Sliding bar"); leftArrow. setVisibility (View. INVISIBLE); rightArrow. setVisibility (View. VISIBLE) ;}@ Override public void onScrollFromMostLeft () {Log. e (DEBUG + TAG, "slide to the left"); leftArrow. setVisibility (View. VISIBLE); rightArrow. setVisibility (View. VISIBLE) ;}@ Override public void onScrollMostRight () {Log. e (DEBUG + TAG, "rightmost slide bar"); leftArrow. setVisibility (View. VISIBLE); rightArrow. setVisibility (View. INVISIBLE) ;}@ Override public void onScrollFromMostRight () {Log. e (DEBUG + TAG, "slide to the rightmost"); leftArrow. setVisibility (View. VISIBLE); rightArrow. setVisibility (View. VISIBLE );}});

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