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  • hackyviewpager有什么用

    继承于viewpager 可以和photoView一起使用,实现相册图片的左右滑动,放大缩小,等
    package davidwang.tm.view;
    
    import android.content.Context;
    import android.support.v4.view.ViewPager;
    import android.util.AttributeSet;
    import android.view.MotionEvent;
    
    /**
     * Found at http://stackoverflow.com/questions/7814017/is-it-possible-to-disable-scrolling-on-a-viewpager.
     * Convenient way to temporarily disable ViewPager navigation while interacting with ImageView.
     * 
     * Julia Zudikova
     */
    
    /**
     * Hacky fix for Issue #4 and
     * http://code.google.com/p/android/issues/detail?id=18990
     * <p/>
     * ScaleGestureDetector seems to mess up the touch events, which means that
     * ViewGroups which make use of onInterceptTouchEvent throw a lot of
     * IllegalArgumentException: pointerIndex out of range.
     * <p/>
     * There's not much I can do in my code for now, but we can mask the result by
     * just catching the problem and ignoring it.
     *
     * @author Chris Banes
     */
    public class HackyViewPager extends ViewPager {
    
        private boolean isLocked;
        
        public HackyViewPager(Context context) {
            super(context);
            isLocked = false;
        }
    
        public HackyViewPager(Context context, AttributeSet attrs) {
            super(context, attrs);
            isLocked = false;
        }
    
        @Override
        public boolean onInterceptTouchEvent(MotionEvent ev) {
            if (!isLocked) {
                try {
                    return super.onInterceptTouchEvent(ev);
                } catch (IllegalArgumentException e) {
                    e.printStackTrace();
                    return false;
                }
            }
            return false;
        }
    
        @Override
        public boolean onTouchEvent(MotionEvent event) {
            if (!isLocked) {
                return super.onTouchEvent(event);
            }
            return false;
        }
        
        public void toggleLock() {
            isLocked = !isLocked;
        }
    
        public void setLocked(boolean isLocked) {
            this.isLocked = isLocked;
        }
    
        public boolean isLocked() {
            return isLocked;
        }
        
    }
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  • 原文地址:https://www.cnblogs.com/zhujiabin/p/5165929.html
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