scrollview中停止滚动的监听

时间：2015-05-22 23:47:21 阅读：753 评论：0 收藏：0 [点我收藏+]

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http://stackoverflow.com/questions/3738965/android-detect-when-scrollview-has-finished-scrolling-and-bouncing-back

ScrollView 用的是scroller做的滑动, 但是 scroller 被scrollView隐藏了你无法调用你可以直接自己写个Scrollview 代码完全copy 自带的scrollView 然后把scroller暴露出来!

可以派生的。如果(mScroller.computeScrollOffset()返回false则表示滚动结束了。

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ScrollView;

public class ObservableScrollView extends ScrollView {

    private OnScrollChangeListener onScrollChangeListener = null;
    private OnScrollStopListener onScrollStopListener = null;

    private OnBorderListener onBorderListener = null;
    
    private boolean isBorderMonitor = false;

    private boolean isStart = false;

    public ObservableScrollView(Context context) {
        this(context, null);
        // TODO Auto-generated constructor stub
    }

    public ObservableScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initObservableScrollView();
        // this(context, attrs, com.android.internal.R.attr.scrollViewStyle);
        // TODO Auto-generated constructor stub
    }

    public ObservableScrollView(Context context, AttributeSet attrs,
            int defStyle) {
        super(context, attrs, defStyle);
        initObservableScrollView();
        // TODO Auto-generated constructor stub
    }

    private void initObservableScrollView() {
        
    }
    
    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        //requestDisallowInterceptTouchEvent(disallowIntercept);
        //disallowIntercept=true不让父元素拦截元素;disallowIntercept=false,没有拦截
        getParent().requestDisallowInterceptTouchEvent(true);
        return super.dispatchTouchEvent(ev);
    }

    public void setOnScrollStopListener(OnScrollStopListener onScrollStopListener) {
        this.onScrollStopListener = onScrollStopListener;
    }

    public void setOnScrollChangeListener(
            OnScrollChangeListener onScrollChangeListener) {
        this.onScrollChangeListener = onScrollChangeListener;
    }

    public void setOnBorderListener(OnBorderListener onBorderListener) {
        this.isBorderMonitor = true;
        this.onBorderListener = onBorderListener;
    }
    
    private void onScrollFinished(){
        if(null != onScrollStopListener){
            onScrollStopListener.onScrollStop(this);
        }
    }

    private void onScrollStart(int l, int t) {
        if (!isStart) {
            isStart = true;
            new ScrollListener(l,t).start();
        }
    }
    
    class ScrollListener extends Thread {
        int oldX, oldY;

        public ScrollListener(int oldx, int oldy) {
            this.oldX = oldx;
            this.oldY = oldy;
        }

        public void run() {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            while (isStart) {
                int newX = getScrollX();
                int newY = getScrollY();
                if (newX == oldX && newY == oldY) {
                    onScrollFinished();
                    isStart = false;
                } else {
                    oldX = newX;
                    oldY = newY;
                }
            }
        }
    }
    
    @Override
    protected void onScrollChanged(int l, int t, int oldl, int oldt) {
        onScrollStart(l,t);
        super.onScrollChanged(l, t, oldl, oldt);
        if (onScrollChangeListener != null) {
            onScrollChangeListener.onScrollChanged(this, l, t, oldl, oldt);
        }
        if (isBorderMonitor) {
            if (0 == t && null != onBorderListener) {
                onBorderListener.onBottom();
            } else if ((getChildAt(0).getMeasuredHeight() <= t + getHeight())
                    && null != onBorderListener) {
                onBorderListener.onTop();
            }
        }
    }
                
    public interface OnScrollChangeListener {
        public void onScrollChanged(ObservableScrollView scrollView, int x, int y,
                int oldx, int oldy);
    }
    
    public interface OnScrollStopListener {
        public void onScrollStop(ObservableScrollView scrollView);
    }

    /**
     * OnBorderListener, Called when scroll to top or bottom
     * 
     * @author Myth 2013-5-22
     */
    public static interface OnBorderListener {

        /**
         * Called when scroll to bottom
         */
        public void onBottom();

        /**
         * Called when scroll to top
         */
        public void onTop();
    }

    public void setBorderMonitor(boolean isBorderMonitor) {
        this.isBorderMonitor = isBorderMonitor;
    }
}

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ScrollView;

public class ObservableScrollView extends ScrollView {

    private OnScrollChangeListener onScrollChangeListener = null;
    private OnScrollStopListener onScrollStopListener = null;

    private OnBorderListener onBorderListener = null;
    
    private boolean isBorderMonitor = false;

    private boolean isStart = false;

    public ObservableScrollView(Context context) {
        this(context, null);
        // TODO Auto-generated constructor stub
    }

    public ObservableScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initObservableScrollView();
        // this(context, attrs, com.android.internal.R.attr.scrollViewStyle);
        // TODO Auto-generated constructor stub
    }

    public ObservableScrollView(Context context, AttributeSet attrs,
            int defStyle) {
        super(context, attrs, defStyle);
        initObservableScrollView();
        // TODO Auto-generated constructor stub
    }

    private void initObservableScrollView() {
        
    }
    
    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        //requestDisallowInterceptTouchEvent(disallowIntercept);
        //disallowIntercept=true不让父元素拦截元素;disallowIntercept=false,没有拦截
        getParent().requestDisallowInterceptTouchEvent(true);
        return super.dispatchTouchEvent(ev);
    }

    public void setOnScrollStopListener(OnScrollStopListener onScrollStopListener) {
        this.onScrollStopListener = onScrollStopListener;
    }

    public void setOnScrollChangeListener(
            OnScrollChangeListener onScrollChangeListener) {
        this.onScrollChangeListener = onScrollChangeListener;
    }

    public void setOnBorderListener(OnBorderListener onBorderListener) {
        this.isBorderMonitor = true;
        this.onBorderListener = onBorderListener;
    }
    
    
    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        if(ev.getAction() == MotionEvent.ACTION_UP){
            // 手指松开.
            if (null != onScrollStopListener) {
                onScrollStopListener.onScrollStop(this);
            }
        }
        return super.onTouchEvent(ev);
    }
    
    @Override
    protected void onScrollChanged(int l, int t, int oldl, int oldt) {
        super.onScrollChanged(l, t, oldl, oldt);
        if (onScrollChangeListener != null) {
            onScrollChangeListener.onScrollChanged(this, l, t, oldl, oldt);
        }
        if (isBorderMonitor) {
            if (0 == t && null != onBorderListener) {
                onBorderListener.onBottom();
            } else if ((getChildAt(0).getMeasuredHeight() <= t + getHeight())
                    && null != onBorderListener) {
                onBorderListener.onTop();
            }
        }
    }
                
    public interface OnScrollChangeListener {
        public void onScrollChanged(ObservableScrollView scrollView, int x, int y,
                int oldx, int oldy);
    }
    
    public interface OnScrollStopListener {
        public void onScrollStop(ObservableScrollView scrollView);
    }

    /**
     * OnBorderListener, Called when scroll to top or bottom
     * 
     * @author Myth 2013-5-22
     */
    public static interface OnBorderListener {

        /**
         * Called when scroll to bottom
         */
        public void onBottom();

        /**
         * Called when scroll to top
         */
        public void onTop();
    }

    public void setBorderMonitor(boolean isBorderMonitor) {
        this.isBorderMonitor = isBorderMonitor;
    }
}

public class CustomScrollView extends ScrollView {
        
        private OnOverScrolledListener mOnOverScrolledListener = null;
        /**
         * @param context
         */
        public CustomScrollView(Context context) {
                super(context);
                // TODO Auto-generated constructor stub
        }

        /**
         * @param context
         * @param attrs
         */
        public CustomScrollView(Context context, AttributeSet attrs) {
                super(context, attrs);
                // TODO Auto-generated constructor stub
        }

        /**
         * @param context
         * @param attrs
         * @param defStyle
         */
        public CustomScrollView(Context context, AttributeSet attrs, int defStyle) {
                super(context, attrs, defStyle);
                // TODO Auto-generated constructor stub
        }

        /* (non-Javadoc)
         * @see android.widget.ScrollView#arrowScroll(int)
         */
        @Override
        public boolean arrowScroll(int arg0) {
                // TODO Auto-generated method stub
                return super.arrowScroll(arg0);
        }

        /* (non-Javadoc)
         * @see android.widget.ScrollView#computeScroll()
         */
        @Override
        public void computeScroll() {
                // TODO Auto-generated method stub
                super.computeScroll();
        }

/**
         * @return the mOnOverScrolledListener
         */
        public OnOverScrolledListener getOnOverScrolledListener() {
                return mOnOverScrolledListener;
        }

        /**
         * @param mOnOverScrolledListener the mOnOverScrolledListener to set
         */
        public void setOnOverScrolledListener(OnOverScrolledListener mOnOverScrolledListener) {
                this.mOnOverScrolledListener = mOnOverScrolledListener;
        }

public interface OnOverScrolledListener{
        public abstract void onOverScrolled(View view, int scrollX, int scrollY, boolean clampedX, boolean clampedY);
    }
    
    /* (non-Javadoc)
     * @see android.widget.ScrollView#onOverScrolled(int, int, boolean, boolean)
     */
    @Override
    protected void onOverScrolled(int scrollX, int scrollY, boolean clampedX, boolean clampedY) {
        // TODO Auto-generated method stub
        super.onOverScrolled(scrollX, scrollY, clampedX, clampedY);
        if(mOnOverScrolledListener != null) {
            mOnOverScrolledListener.onOverScrolled(this, scrollX, scrollY, clampedX, clampedY);
        }
        Log.i("CustomScrollView", "===DBG:onOverScrolled");
    }

}

scrollview中停止滚动的监听

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原文地址：http://www.cnblogs.com/exmyth/p/4523408.html

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