解决viewPager+Fragment会出现viewpager中的fragment高度不正常的问题

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当你用到viewPager+Fragment这个组合的时候可能会出现字fragment出现子部fragment高度显示不了或者不正常的问题，那么我们只需要重写viewpager即可，在viewpager中计算下子布局的大小即可：

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

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

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

        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

以上代码添加在自定义的viewpager中