解决java.lang.IllegalStateException: The application’s PagerAdapter changed the adapter’s content

A界面中有viewpager的动态加载，从界面A跳到界面B，再finish掉B返回A时报出此异常。

java.lang.IllegalStateException: 
The application's PagerAdapter changed the adapter's contents without calling PagerAdapter#notifyDataSetChanged! 
Expected adapter item count: 0, found: 1 Pager id: com.##.##.android:id/vp_pager Pager class: class android.support.v4.view.ViewPager Problematic adapter: class com.##.contacts.quickcontact.Activity$ViewPagerAdapter
- ::21.060: E/com.##.##.##.Application():  at android.support.v4.view.ViewPager.populate(ViewPager.java:)
- ::21.060: E/com.##.##.##.Application():  at android.support.v4.view.ViewPager.populate(ViewPager.java:)
- ::21.060: E/com.##.##.##.Application():  at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:)
- ::21.060: E/com.##.##.##.Application():  at android.view.View.measure(View.java:)
- ::21.060: E/com.##.##.##.Application():  at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:)
- ::21.060: E/com.##.##.##.Application():  at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:)
- ::21.060: E/com.##.##.##.Application():  at android.widget.LinearLayout.measureVertical(LinearLayout.java:)
- ::21.060: E/com.##.##.##.Application():  at android.widget.LinearLayout.onMeasure(LinearLayout.java:)

我的解决办法是

在界面A的onResume()方法中调用这个viewpager的adapter.notifyDataSetChanged()方法，这样就OK了