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第一个是HomeFragement
第二个是OrdersFragment

由HomeFragment切换到OrdersFragment之后的周期调用情况

HomeFragment只是调用了onDestroyView方法，没有调用onDestroy方法

07-29 11:21:56.560 18830-18830/com.finobusiness.forhomelife D/HomeFragment: onDestroyView:
07-29 11:21:56.565 18830-18830/com.finobusiness.forhomelife D/OrdersFragment: onCreateView:

@Overridepublic Object instantiateItem(ViewGroup container, int position) {    if (mCurTransaction == null) {        mCurTransaction = mFragmentManager.beginTransaction();    }    final long itemId = getItemId(position);    // Do we already have this fragment?    String name = makeFragmentName(container.getId(), itemId);    Fragment fragment = mFragmentManager.findFragmentByTag(name);    if (fragment != null) {        if (DEBUG) Log.v(TAG, "Attaching item #" + itemId + ": f=" + fragment);        mCurTransaction.attach(fragment);    } else {        fragment = getItem(position);        if (DEBUG) Log.v(TAG, "Adding item #" + itemId + ": f=" + fragment);        mCurTransaction.add(container.getId(), fragment,                makeFragmentName(container.getId(), itemId));    }    if (fragment != mCurrentPrimaryItem) {        fragment.setMenuVisibility(false);        fragment.setUserVisibleHint(false);    }    return fragment;}