viewPager中加载frament方法

//viewPager中加载frament方法

//查找是不是已经保存过fragment，优先使用保存过的fragment
if(savedInstanceState!=null) {
	fragment1=(MyGridViewFragment) getChildFragmentManager().getFragment(savedInstanceState, "first");
	if((MyGridViewFragment) getChildFragmentManager().getFragment(savedInstanceState, "first")==null) {
		fragment1=MyGridViewFragment.getInstance(1);
	}
	else {
		fragment1=(MyGridViewFragment) getChildFragmentManager().getFragment(savedInstanceState, "first");
	}
	if((MyGridViewFragment) getChildFragmentManager().getFragment(savedInstanceState, "second")==null) {
		fragment2=MyGridViewFragment.getInstance(2);
	}
	else {
		fragment2=(MyGridViewFragment) getChildFragmentManager().getFragment(savedInstanceState, "second");
	}
	if((MyGridViewFragment) getChildFragmentManager().getFragment(savedInstanceState, "third")==null) {
		fragment3=MyGridViewFragment.getInstance(3);
	}
	else {
		fragment3=(MyGridViewFragment) getChildFragmentManager().getFragment(savedInstanceState, "third");
	}				
	if((ThemeFragment) getChildFragmentManager().getFragment(savedInstanceState, "four")==null) {
		fragment4=new ThemeFragment();
	}
	else {
		fragment4=(ThemeFragment) getChildFragmentManager().getFragment(savedInstanceState, "four");
	}

}
else {
	fragment1=MyGridViewFragment.getInstance(1);
	fragment2=MyGridViewFragment.getInstance(2);
	fragment3=MyGridViewFragment.getInstance(3);
	fragment4=new ThemeFragment();
}
fragments.add(fragment1);
fragments.add(fragment2);
fragments.add(fragment3);
fragments.add(fragment4);

//注意这边一定要使用getChildFragmentManager()
adapter = new MyAdapter1(getChildFragmentManager());

//如果fragment页曾经被展示过，那么就保存
@Override
public void onSaveInstanceState(Bundle outState) {
	// TODO Auto-generated method stub
	super.onSaveInstanceState(outState);
	if(fragment1!=null&&fragment1.isAdded()) {
		getFragmentManager().putFragment(outState, "first", fragment1);
	}
	if(fragment2!=null&&fragment2.isAdded()) {
		getFragmentManager().putFragment(outState, "second", fragment2);
	}
	if(fragment3!=null&&fragment3.isAdded()) {
		getFragmentManager().putFragment(outState, "third", fragment3);
	}
	if(fragment4!=null&&fragment4.isAdded()) {
		getFragmentManager().putFragment(outState, "four", fragment4);
	}
}