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;}
