在RecyclerView header中使用会导致切换动画丢失，建议重写ViewPager onAttachedToWindow

[shen5818]

@OverRide
protected void onAttachedToWindow() {
super.onAttachedToWindow();
try {
Field mFirstLayout = ViewPager.class.getDeclaredField("mFirstLayout");
mFirstLayout.setAccessible(true);
mFirstLayout.set(this, false);
} catch (Exception e) {
e.printStackTrace();
}