Android 自定义ScrollView嵌套滚动兼容，监听滑动状态：顶部、底部、停止、滑动中

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/** * 1、监听ScrollView滚动 * 2、嵌套滚动兼容 * * @author chrisZou * @from http://blog.csdn.net/fy993912_chris/article/details/72765260 * @email chrisSpringSmell@gmail.com */public class CustomCompatScrollView extends ScrollView {    private GestureDetector mGestureDetector;    private ScrollListener scrollListener;    private boolean isScrolling = false;    public CustomCompatScrollView(Context context) {        this(context, null);    }    public CustomCompatScrollView(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }    public CustomCompatScrollView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        mGestureDetector = new GestureDetector(context, new YScrollDetector());        setFadingEdgeLength(0);    }    @Override    protected void onScrollChanged(int x, int y, int oldX, int oldY) {        super.onScrollChanged(x, y, oldX, oldY);        if (scrollListener != null) {            isScrolling = true;            scrollListener.onScrollChanged(this, x, y, oldX, oldY);            if (getChildAt(0) != null && getChildAt(0).getMeasuredHeight() <= getScrollY() + getHeight()) {                scrollListener.onScrollBottom(this);            } else if (getScrollY() == 0) {                scrollListener.onScrollTop(this);            }        }    }    @Override    public boolean onTouchEvent(MotionEvent ev) {        if (MotionEvent.ACTION_UP == ev.getAction()) {            if (isScrolling) {                scrollListener.onScrollStop(this);            }            isScrolling = false;        }        return super.onTouchEvent(ev);    }    @Override    public boolean onInterceptTouchEvent(MotionEvent ev) {        return super.onInterceptTouchEvent(ev) && mGestureDetector.onTouchEvent(ev);    }    public void setScrollListener(ScrollListener scrollListener) {        this.scrollListener = scrollListener;    }    class YScrollDetector extends GestureDetector.SimpleOnGestureListener {        @Override        public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {            return Math.abs(distanceY) > Math.abs(distanceX);        }    }    public interface ScrollListener {        void onScrollChanged(ScrollView scrollView, int x, int y, int oldx, int oldy);        void onScrollBottom(ScrollView scrollView);        void onScrollTop(ScrollView scrollView);        void onScrollStop(ScrollView scrollView);    }}
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