绑定数据报错 The specified child already has a parent. You must call remove

ViewPager 绑定数据报错Java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child’s parent first

参考资料：
http://blog.sina.com.cn/s/blog_b28d17530101ee5z.html
http://blog.csdn.net/mengliluohua_151/article/details/41866137
https://stackoverflow.com/questions/22936886/java-lang-illegalstateexception-while-using-viewpager-in-android

源代码：
ViewPager 使用代码：

views = new ArrayList<View>();views.add(gridView1);views.add(gridView2);views.add(gridView3);views.add(gridView4);views.add(gridView5);views.add(gridView6);//自定义适配器adapter = new MyPagerAdapter(views);vp.setAdapter(adapter);

布局代码：

<LinearLayout ......><android.support.v4.view.ViewPager android:id="@+id/view_pager"        ......>  <GridView        android:id="@+id/gv_menu1"  ......><GridView        android:id="@+id/gv_menu2"  ......><GridView        android:id="@+id/gv_menu3"  ......><GridView        android:id="@+id/gv_menu4"  ......><GridView        android:id="@+id/gv_menu5"  ......><GridView        android:id="@+id/gv_menu6"  ......>    </GridView></android.support.v4.view.ViewPager></LinearLayout>

自定义adapter代码:

class MyPagerAdapter extends PagerAdapter {        private List<View> viewList;        public MyPagerAdapter(List<View> viewList) {            this.viewList = viewList;        }        @Override        public int getCount() {            return viewList!=null ? viewList.size() : 0;        }        @Override        public boolean isViewFromObject(View arg0, Object arg1) {            // TODO Auto-generated method stub            return arg0 == arg1;        }        @Override        public Object instantiateItem(ViewGroup container, int position) {            container.addView(viewList.get(position));//报错            return viewList.get(position);        }        @Override        public void destroyItem(ViewGroup container, int position, Object object) {            container.removeView(viewList.get(position));        }    }

报错信息：
java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child’s parent first.

原因调查：
类MyPagerAdapter 中的instantiateItem函数中，参数ViewGroup传入的是ViewPager对象，但ViewPager已经在布局中包含了这6个GridView对象，再去调用addView（）去添加6个GridView中的一个，就会报错。
所以要添加需要先移除这个GridView，问题处理。

修改后代码：

public Object instantiateItem(ViewGroup container, int position) {            if (container != null) {                container.removeView(viewList.get(position));            }            container.addView(viewList.get(position));            return viewList.get(position);}

应该不是最完善的解决之法，请多指正！