viewpager自适应高度

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我是靠谱客的博主甜蜜裙子，最近开发中收集的这篇文章主要介绍viewpager自适应高度，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

//不能滑动的viewpager  自适应高度
public class IndexViewPager extends ViewPager{
    private int current;
    private boolean isScroll;
                private int height = 0;

                private boolean scrollble = true;

                public IndexViewPager(Context context) {
        super(context);
    }

                public IndexViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

                @Override
                protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {


        if (getChildCount() > current) {
            View child = getChildAt(current);
            child.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
            int h = child.getMeasuredHeight();
            height = h;
        }

        heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);

        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

     public void resetHeight(int current){
        this.current = current;
        if (getChildCount() > current) {
            LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) getLayoutParams();
            if (layoutParams == null) {
                layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, height);
            } else {
                layoutParams.height = height;
            }
            setLayoutParams(layoutParams);
        }
    }


//                @Override
//    public boolean onTouchEvent(MotionEvent ev) {
//       if (!scrollble) {
//            return false;
//        }
//          return super.onTouchEvent(ev);
//    }


                public boolean isScrollble() {
        return scrollble;
    }

                public void setScrollble(boolean scrollble) {
        this.scrollble = scrollble;
    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        return super.dispatchTouchEvent(ev);   // return true;不行
    }
    /**
     * 是否拦截
     * 拦截:会走到自己的onTouchEvent方法里面来
     * 不拦截:事件传递给子孩子
     */
    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        // return false;//可行,不拦截事件,
        // return true;//不行,孩子无法处理事件
        //return super.onInterceptTouchEvent(ev);//不行,会有细微移动
        if (isScroll){
            return super.onInterceptTouchEvent(ev);
        }else{
            return false;
        }
    }
    /**
     * 是否消费事件
     * 消费:事件就结束
     * 不消费:往父控件传
     */
    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        //return false;// 可行,不消费,传给父控件
        //return true;// 可行,消费,拦截事件
        //super.onTouchEvent(ev); //不行,
        //虽然onInterceptTouchEvent中拦截了,
        //但是如果viewpage里面子控件不是viewgroup,还是会调用这个方法.
        if (isScroll){
            return super.onTouchEvent(ev);
        }else {
            return true;// 可行,消费,拦截事件
        }
    }
    public void setScroll(boolean scroll) {
        isScroll = scroll;
    }

}

在xml中引用viewpager

在activity中切换时再调用resetHeight(psoition);就可以了