Fragment的生命周期：
1. onAttach()：Fragment对象跟Activity关联时
2. onCreate()：Fragment对象的初始创建时
3. onCreateView()：创建Fragment的View对象时
4. onActivityCreate()：所依附的Activity对象已经完成了Activity.onCreate()方法时
5. onStart()：界面即将显示给用户，当Activity的onStart方法调用时
6. onResume()：可以获取焦点与用户交互，当Activity的onResume调用时
7. onPause():Activity被遮挡不可获取焦点调用了onPause时，或者Activity（或其他容器）打开另一个Fragment，当前Fragemnt无法获取焦点时
8. onStop()：Activity不可见调用了onStop()时，或者Activity（或其他容器）打开另一个Fragment当前Fragment不再显示给用户时
9. onDestroyView()：Fragment中的View对象即将被从当前界面中移除时
10. onDestroy()：Fragment对象被销毁时
11. onDetach()：在Fragment对象不再跟它依附的Activity关联的时候，方法会立即被调用
一，Fragment的生命周
二，与Activity生命周期的对比
场景演示 : 切换到该Fragment
11-29 14:26:35.095: D/AppListFragment(7649): onAttach
11-29 14:26:35.095: D/AppListFragment(7649): onCreate
11-29 14:26:35.095: D/AppListFragment(7649): onCreateView
11-29 14:26:35.100: D/AppListFragment(7649): onActivityCreated
11-29 14:26:35.120: D/AppListFragment(7649): onStart
11-29 14:26:35.120: D/AppListFragment(7649): onResume
屏幕灭掉：
11-29 14:27:35.185: D/AppListFragment(7649): onPause
11-29 14:27:35.205: D/AppListFragment(7649): onSaveInstanceState
11-29 14:27:35.205: D/AppListFragment(7649): onStop
屏幕解锁
11-29 14:33:13.240: D/AppListFragment(7649): onStart
11-29 14:33:13.275: D/AppListFragment(7649): onResume
切换到其他Fragment:
11-29 14:33:33.655: D/AppListFragment(7649): onPause
11-29 14:33:33.655: D/AppListFragment(7649): onStop
11-29 14:33:33.660: D/AppListFragment(7649): onDestroyView
切换回本身的Fragment:
11-29 14:33:55.820: D/AppListFragment(7649): onCreateView
11-29 14:33:55.825: D/AppListFragment(7649): onActivityCreated
11-29 14:33:55.825: D/AppListFragment(7649): onStart
11-29 14:33:55.825: D/AppListFragment(7649): onResume
回到桌面
11-29 14:34:26.590: D/AppListFragment(7649): onPause
11-29 14:34:26.880: D/AppListFragment(7649): onSaveInstanceState
11-29 14:34:26.880: D/AppListFragment(7649): onStop
回到应用
11-29 14:36:51.940: D/AppListFragment(7649): onStart
11-29 14:36:51.940: D/AppListFragment(7649): onResume
退出应用
11-29 14:37:03.020: D/AppListFragment(7649): onPause
11-29 14:37:03.155: D/AppListFragment(7649): onStop
11-29 14:37:03.155: D/AppListFragment(7649): onDestroyView
11-29 14:37:03.165: D/AppListFragment(7649): onDestroy
11-29 14:37:03.165: D/AppListFragment(7649): onDetach
比Activity多了一些生命周期，完整和Activity对接上，大家好好利用。