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android学习八 多用途碎片
阅读量：5348 次
发布时间：2019-06-15

本文共 24125 字，大约阅读时间需要 80 分钟。

碎片设计初衷：帮助开发人员管理应用程序功能。

特点：1.大量重用
          2.可用性强
          3.适应多种布局
          
碎片 1.包含一个视图层次结构和具有相应的生命周期
        2.碎片必须在一个活动的上下文中工作
        3.碎片的生命周期和活动很相似
        4.但在状态的保存与恢复上与活动有区别
 
碎片的优点：
        a.在布局管理的时候可以直接作用于布局本身，而不必理会碎片内部
        b.碎片的状态容易保存和恢复
        c.可以将碎片添加到后退栈，实现在活动内按back键回退到上一个碎片
        d.碎片的切换可以有多种特效
 
碎片的结构
         a.碎片的基类继承自 android.app.Object类，而不是activity的context类
         b.碎片的视图层次结构
         c.因为碎片在恢复时会调用默认的构造函数，所以必须
确保碎片类有默认的构造函数
         d.由于碎片的恢复需要，所以在创建碎片后最好指定参数包，并适当设置，以供恢复时使用。
         e.碎片的状态可以保存到包，像activity一样，在后续的回调（onCreate,onInflate,onActivityCreated)中调用。
 
碎片的标示：
          由于碎片可以被管理，所以拥有一些自身的识别信息，包括一个
标示和一个
ID.
 
碎片的生命周期：

 

 
主要关注虚线部分，因为虚线部分会跳过一些回调。
 
setArguments()方法只能在on_attach前调用，而在其后的整个生命周期都可以调用getArguments.
 
回调函数说明(按照常规调用顺序排列）
 
onInflate()：如果是通过<fragment>标签扩充则会包括属性列表AttributeSet，如果之前有调用onSaveInstanceState()则会包括一个状态包Bundle。
不要对界面做任何操作。
setArguments()方法只能在onattach前调用，而在其后的整个生命周期都可以调用getArguments.
onAttach(): 将传入Activity（可以在这个时刻保存其引用，也可以在下面的任何时候通过getActivity()获取。
onCreate(): 不应该有任何与界面相关的操作，因为活动还未创建完成。这里能获取到保存的状态包。
onCreateView()：不要将试图附加到传入的容器中。inflate的第三个参数为false。
onActivityCreated()：用户界面的最后调整机会，这里确保其他碎片已经附加到活动中。
onStart()：同活动的onStart绑定，以前放在onStart中的逻辑，现在可以放在这里。
onResume()：同活动的onResume绑定，以前放在中的逻辑，现在可以放在这里。
onSaveInstanceState()：保存需要保存的数据导包里面
onPause()：避免耗资源的操作
onStop()：
onDestoryView()
onDestory()
onDetach()
 
 
setRetainInstance(true)表示在活动重建的过程中，不调用onDestory删除内存中碎片对象，方便恢复。而调用该函数的最佳位置是onCreate中。 因为调用这个函数后 流程很可能如下onDestoryView->
跳过onDestory直接调用onDetach->onInflate->onAttach->
跳过onCreate直接调用onCreateView 。 因此在这种情况下需要考虑onCreate的逻辑，因为会被跳过不执行。
 
编程注意事项
1.<fragment>标签有一个指定碎片类的class属性。因为<fragment>标签只是占位符所以在其下不应该有子标签。
2.要达到动态切换碎片的目标，就需要有一个容器。例如在<fragment>标签下声明一个<FrameLayout>
3.判断横屏的方法 if(getResources()->getConfigration()->orentation=Configuration.ORIENTATION_LANDSCAPE)
4.可以通过setTransction()方法和setCustomAnimations()方法设置碎片的过渡效果。
5.动态碎片的一般代码结构
         FragmentManager.startFragmentTransction().add()/replace()/hide()/show()/remove().commit();
6.在活动中获取碎片管理器 getFragmentManager()
7.可以使用活动的碎片管理器来获取事务（getFragmentTransction()),获取碎片(findFragmentById()/findFragmentByTag()/getFragment()这个与putFragment搭配使用），从后退栈中删除指定ID或指定位置的碎片。
 
8.可以通过添加没有视图结构的碎片作为setRetainInstance()的备选方案。
9.因为在多种情况下会将碎片保存且切出内存，所以不应该长时间保存碎片的引用，而应该通FragmentManager.fndFragmentById来实现。
 
10.ListFragment类
 
11.当前活动的顶级视图容器 android.R.id.content
12.由于可以在活动或碎片中获取FragmentManager,而FragmentManager又能获取任意碎片的引用，所以在活动或碎片中操作其他碎片很容易。
 
13.碎片的直接通信
     FragmentOther fragOther = 

(FragmentOther)getFragmentManager().findFragmentByTag(“other”);

fragOther.callCustomMethod( arg1, arg2 );

 
14.与目标碎片的通信。A碎片创建B碎片，B碎片将A碎片设置为目标碎片，B碎片设置A碎片的内容。
 
//A碎片创建B碎片
mCalledFragment = new CalledFragment();
mCalledFragment.setTargetFragment(this, 0);  //B碎片将当前的A碎片设置为目标碎片
fm.beginTransaction().add(mCalledFragment, "work").commit(); 
 
//B碎片设置A碎片内容
TextView tv = (TextView)
getTargetFragment().getView().findViewById(R.id.text1);
tv.setText(“Set from the called fragment”); 
 
 
 
后退栈：可以通过创建和管理FragmentTransction来让碎片参与到后退栈中（FragmentTransction.addToBackStack())，实现活动内部碎片级别的back按钮。如果不实现，则活动的所有碎片都与活动同步回滚。
 
 
示例程序的时序：(竖屏进入应用，按back键回退到主活动，按标题进入详细碎片，横屏）
10-19 00:59:49.440: V/FragmentLifeTimeTest Log:(7837): MainActivity.onCreate is called!
10-19 00:59:49.450: V/FragmentManager(7837): onCreateView: id=0x7f090041 fname=com.example.fragmentlifetimetest.TitleFragment existing=null
10-19 00:59:49.450: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onInflate is called!
10-19 00:59:49.450: V/FragmentLifeTimeTest Log:(7837): id = @2131296321
10-19 00:59:49.450: V/FragmentLifeTimeTest Log:(7837): layout_width = -1
10-19 00:59:49.450: V/FragmentLifeTimeTest Log:(7837): layout_height = -1
10-19 00:59:49.450: V/FragmentLifeTimeTest Log:(7837): class = com.example.fragmentlifetimetest.TitleFragment
10-19 00:59:49.450: V/FragmentManager(7837): add: TitleFragment{42608e10 id=0x7f090041}
10-19 00:59:49.450: V/FragmentManager(7837): Allocated fragment index TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:49.460: V/FragmentManager(7837): moveto CREATED: TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:49.460: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onAttach is called!
10-19 00:59:49.460: V/FragmentLifeTimeTest Log:(7837): in MainActivity onAttachFragment. fragment id = 2131296321
10-19 00:59:49.460: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onCreate is called!
10-19 00:59:49.460: V/FragmentLifeTimeTest Log:(7837): savedInstanceState is null!
10-19 00:59:49.460: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onCreateView is called!
10-19 00:59:49.460: V/FragmentLifeTimeTest Log:(7837): MainActivity.onStart is called!
10-19 00:59:49.490: V/FragmentManager(7837): moveto ACTIVITY_CREATED: TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:49.490: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onActivityCreated is called!
10-19 00:59:49.490: V/FragmentLifeTimeTest Log:(7837): savedInstanceState is null!
10-19 00:59:49.490: V/FragmentLifeTimeTest Log:(7837): MainActivity.showDetail is called!
10-19 00:59:49.520: V/FragmentManager(7837): moveto STARTED: TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:49.520: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onStart is called!
10-19 00:59:49.520: V/FragmentLifeTimeTest Log:(7837): MainActivity.onResume is called!
10-19 00:59:49.520: V/FragmentManager(7837): moveto RESUMED: TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:49.520: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onResume is called!
10-19 00:59:49.520: V/FragmentLifeTimeTest Log:(7837): MainActivity.onSaveInstanceState is called!
10-19 00:59:49.520: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onSaveInstanceState is called! save curChoice=0
10-19 00:59:49.530: V/FragmentManager(7837): Saved state of TitleFragment{42608e10 #0 id=0x7f090041}: Bundle[{android:view_state=android.util.SparseArray@4260f6d8, curChoice=0}]
10-19 00:59:49.530: V/FragmentManager(7837): saveAllState: adding fragment #0: TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:49.530: V/FragmentLifeTimeTest Log:(7837): MainActivity.onPause is called!
10-19 00:59:49.530: V/FragmentManager(7837): movefrom RESUMED: TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:49.530: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onPause is called!
10-19 00:59:49.580: V/FragmentLifeTimeTest Log:(7837): DetailActivity.onCreate called!
10-19 00:59:49.580: V/FragmentLifeTimeTest Log:(7837): DetailFragment.newInstance(Bundle) called! index=0
10-19 00:59:49.580: V/FragmentLifeTimeTest Log:(7837): DetailFragment.newInstance(int) called! index=0
10-19 00:59:49.580: V/FragmentLifeTimeTest Log:(7837): newInstance end
10-19 00:59:49.580: V/FragmentManager(7837): Commit: BackStackEntry{42615220}
10-19 00:59:49.580: D/FragmentManager(7837):   mName=null mIndex=-1 mCommitted=false
10-19 00:59:49.580: D/FragmentManager(7837):   Operations:
10-19 00:59:49.580: D/FragmentManager(7837):     Op #0: ADD DetailFragment{42615098 id=0x1020002}
10-19 00:59:49.580: V/FragmentLifeTimeTest Log:(7837): DetailActivity.onStart begin
10-19 00:59:49.580: V/FragmentManager(7837): Run: BackStackEntry{42615220}
10-19 00:59:49.580: V/FragmentManager(7837): add: DetailFragment{42615098 id=0x1020002}
10-19 00:59:49.580: V/FragmentManager(7837): Allocated fragment index DetailFragment{42615098 #0 id=0x1020002}
10-19 00:59:49.580: V/FragmentManager(7837): moveto CREATED: DetailFragment{42615098 #0 id=0x1020002}
10-19 00:59:49.580: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onAttach called!
10-19 00:59:49.580: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onCreate called!
10-19 00:59:49.580: V/FragmentLifeTimeTest Log:(7837): savedInstanceState is null!
10-19 00:59:49.580: V/FragmentManager(7837): moveto ACTIVITY_CREATED: DetailFragment{42615098 #0 id=0x1020002}
10-19 00:59:49.590: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onCreateView called!
10-19 00:59:49.590: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onActivityCreated called!
10-19 00:59:49.590: V/FragmentLifeTimeTest Log:(7837): savedInstanceState is null!
10-19 00:59:49.590: V/FragmentManager(7837): moveto STARTED: DetailFragment{42615098 #0 id=0x1020002}
10-19 00:59:49.590: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onStart called!
10-19 00:59:49.590: V/FragmentLifeTimeTest Log:(7837): DetailActivity.onResume begin
10-19 00:59:49.590: V/FragmentManager(7837): moveto RESUMED: DetailFragment{42615098 #0 id=0x1020002}
10-19 00:59:49.590: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onResume called!
10-19 00:59:49.870: V/FragmentLifeTimeTest Log:(7837): MainActivity.onStop is called!
10-19 00:59:49.870: V/FragmentManager(7837): movefrom STARTED: TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:49.870: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onStop is called!
10-19 00:59:49.870: V/FragmentManager(7837): movefrom STOPPED: TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:52.533: V/FragmentLifeTimeTest Log:(7837): DetailActivity.finish begin
10-19 00:59:52.543: V/FragmentLifeTimeTest Log:(7837): DetailActivity.onPause begin
10-19 00:59:52.543: V/FragmentManager(7837): movefrom RESUMED: DetailFragment{42615098 #0 id=0x1020002}
10-19 00:59:52.543: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onPause called!
10-19 00:59:52.563: V/FragmentLifeTimeTest Log:(7837): MainActivity.onStart is called!
10-19 00:59:52.563: V/FragmentManager(7837): moveto STARTED: TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:52.563: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onStart is called!
10-19 00:59:52.563: V/FragmentLifeTimeTest Log:(7837): MainActivity.onResume is called!
10-19 00:59:52.563: V/FragmentManager(7837): moveto RESUMED: TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:52.563: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onResume is called!
10-19 00:59:52.833: V/FragmentLifeTimeTest Log:(7837): DetailActivity.onStop begin
10-19 00:59:52.833: V/FragmentManager(7837): movefrom STARTED: DetailFragment{42615098 #0 id=0x1020002}
10-19 00:59:52.843: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onStop called!
10-19 00:59:52.843: V/FragmentLifeTimeTest Log:(7837): DetailActivity.onDestroy begin
10-19 00:59:52.843: V/FragmentManager(7837): movefrom STOPPED: DetailFragment{42615098 #0 id=0x1020002}
10-19 00:59:52.843: V/FragmentManager(7837): movefrom ACTIVITY_CREATED: DetailFragment{42615098 #0 id=0x1020002}
10-19 00:59:52.843: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onDestroyView called! view=android.support.v4.app.NoSaveStateFrameLayout@4261b5d8
10-19 00:59:52.843: V/FragmentManager(7837): movefrom CREATED: DetailFragment{42615098 #0 id=0x1020002}
10-19 00:59:52.853: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onDestroy called!
10-19 00:59:52.853: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onDetach called!
10-19 00:59:52.853: V/FragmentManager(7837): Freeing fragment index DetailFragment{42615098 #0 id=0x1020002}
10-19 00:59:55.596: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onListItemClick is called! position=3
10-19 00:59:55.596: V/FragmentLifeTimeTest Log:(7837): MainActivity.showDetail is called!
10-19 00:59:55.616: V/FragmentLifeTimeTest Log:(7837): MainActivity.onSaveInstanceState is called!
10-19 00:59:55.616: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onSaveInstanceState is called! save curChoice=3
10-19 00:59:55.626: V/FragmentManager(7837): Saved state of TitleFragment{42608e10 #0 id=0x7f090041}: Bundle[{android:view_state=android.util.SparseArray@42622708, curChoice=3}]
10-19 00:59:55.626: V/FragmentManager(7837): saveAllState: adding fragment #0: TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:55.626: V/FragmentLifeTimeTest Log:(7837): MainActivity.onPause is called!
10-19 00:59:55.626: V/FragmentManager(7837): movefrom RESUMED: TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:55.626: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onPause is called!
10-19 00:59:55.646: V/FragmentLifeTimeTest Log:(7837): DetailActivity.onCreate called!
10-19 00:59:55.646: V/FragmentLifeTimeTest Log:(7837): DetailFragment.newInstance(Bundle) called! index=3
10-19 00:59:55.646: V/FragmentLifeTimeTest Log:(7837): DetailFragment.newInstance(int) called! index=3
10-19 00:59:55.646: V/FragmentLifeTimeTest Log:(7837): newInstance end
10-19 00:59:55.646: V/FragmentManager(7837): Commit: BackStackEntry{42625790}
10-19 00:59:55.646: D/FragmentManager(7837):   mName=null mIndex=-1 mCommitted=false
10-19 00:59:55.646: D/FragmentManager(7837):   Operations:
10-19 00:59:55.646: D/FragmentManager(7837):     Op #0: ADD DetailFragment{42625608 id=0x1020002}
10-19 00:59:55.646: V/FragmentLifeTimeTest Log:(7837): DetailActivity.onStart begin
10-19 00:59:55.646: V/FragmentManager(7837): Run: BackStackEntry{42625790}
10-19 00:59:55.646: V/FragmentManager(7837): add: DetailFragment{42625608 id=0x1020002}
10-19 00:59:55.656: V/FragmentManager(7837): Allocated fragment index DetailFragment{42625608 #0 id=0x1020002}
10-19 00:59:55.656: V/FragmentManager(7837): moveto CREATED: DetailFragment{42625608 #0 id=0x1020002}
10-19 00:59:55.656: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onAttach called!
10-19 00:59:55.656: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onCreate called!
10-19 00:59:55.656: V/FragmentLifeTimeTest Log:(7837): savedInstanceState is null!
10-19 00:59:55.656: V/FragmentManager(7837): moveto ACTIVITY_CREATED: DetailFragment{42625608 #0 id=0x1020002}
10-19 00:59:55.656: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onCreateView called!
10-19 00:59:55.656: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onActivityCreated called!
10-19 00:59:55.656: V/FragmentLifeTimeTest Log:(7837): savedInstanceState is null!
10-19 00:59:55.656: V/FragmentManager(7837): moveto STARTED: DetailFragment{42625608 #0 id=0x1020002}
10-19 00:59:55.666: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onStart called!
10-19 00:59:55.666: V/FragmentLifeTimeTest Log:(7837): DetailActivity.onResume begin
10-19 00:59:55.666: V/FragmentManager(7837): moveto RESUMED: DetailFragment{42625608 #0 id=0x1020002}
10-19 00:59:55.666: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onResume called!
10-19 00:59:55.997: V/FragmentLifeTimeTest Log:(7837): MainActivity.onStop is called!
10-19 00:59:55.997: V/FragmentManager(7837): movefrom STARTED: TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:55.997: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onStop is called!
10-19 00:59:55.997: V/FragmentManager(7837): movefrom STOPPED: TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:58.249: V/FragmentLifeTimeTest Log:(7837): DetailActivity.onSaveInstanceState begin
10-19 00:59:58.249: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onSaveInstanceState called!
10-19 00:59:58.249: V/FragmentManager(7837): Saved state of DetailFragment{42625608 #0 id=0x1020002}: Bundle[{android:view_state=android.util.SparseArray@4262f850}]
10-19 00:59:58.249: V/FragmentManager(7837): saveAllState: adding fragment #0: DetailFragment{42625608 #0 id=0x1020002}
10-19 00:59:58.249: V/FragmentLifeTimeTest Log:(7837): DetailActivity.onPause begin
10-19 00:59:58.249: V/FragmentManager(7837): movefrom RESUMED: DetailFragment{42625608 #0 id=0x1020002}
10-19 00:59:58.249: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onPause called!
10-19 00:59:58.249: V/FragmentLifeTimeTest Log:(7837): DetailActivity.onStop begin
10-19 00:59:58.249: V/FragmentManager(7837): movefrom STARTED: DetailFragment{42625608 #0 id=0x1020002}
10-19 00:59:58.249: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onStop called!
10-19 00:59:58.249: V/FragmentManager(7837): movefrom STOPPED: DetailFragment{42625608 #0 id=0x1020002}
10-19 00:59:58.259: V/FragmentLifeTimeTest Log:(7837): DetailActivity.onDestroy begin
10-19 00:59:58.259: V/FragmentManager(7837): movefrom ACTIVITY_CREATED: DetailFragment{42625608 #0 id=0x1020002}
10-19 00:59:58.269: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onDestroyView called! view=android.support.v4.app.NoSaveStateFrameLayout@4262b760
10-19 00:59:58.269: V/FragmentManager(7837): movefrom CREATED: DetailFragment{42625608 #0 id=0x1020002}
10-19 00:59:58.269: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onDestroy called!
10-19 00:59:58.269: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onDetach called!
10-19 00:59:58.269: V/FragmentManager(7837): Freeing fragment index DetailFragment{42625608 #0 id=0x1020002}
10-19 00:59:58.299: V/FragmentManager(7837): Instantiated fragment DetailFragment{42633190 #0 id=0x1020002}
10-19 00:59:58.299: V/FragmentManager(7837): restoreAllState: active #0: DetailFragment{42633190 #0 id=0x1020002}
10-19 00:59:58.299: V/FragmentManager(7837): restoreAllState: added #0: DetailFragment{42633190 #0 id=0x1020002}
10-19 00:59:58.299: V/FragmentManager(7837): moveto CREATED: DetailFragment{42633190 #0 id=0x1020002}
10-19 00:59:58.299: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onAttach called!
10-19 00:59:58.299: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onCreate called!
10-19 00:59:58.299: V/FragmentLifeTimeTest Log:(7837): key = android:view_state
10-19 00:59:58.299: V/FragmentLifeTimeTest Log:(7837): DetailActivity.onCreate called!
10-19 00:59:58.299: V/FragmentLifeTimeTest Log:(7837): DetailActivity.finish begin
10-19 00:59:58.329: V/FragmentLifeTimeTest Log:(7837): MainActivity.onDestroy is called!
10-19 00:59:58.329: V/FragmentManager(7837): movefrom ACTIVITY_CREATED: TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:58.329: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onDestroyView is called! view=android.support.v4.app.NoSaveStateFrameLayout@4260cae8
10-19 00:59:58.329: V/FragmentManager(7837): movefrom CREATED: TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:58.329: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onDestroy is called!
10-19 00:59:58.329: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onDetach is called!
10-19 00:59:58.329: V/FragmentManager(7837): Freeing fragment index TitleFragment{42608e10 #0 id=0x7f090041}
10-19 00:59:58.339: V/FragmentLifeTimeTest Log:(7837): MainActivity.onCreate is called!
10-19 00:59:58.339: V/FragmentManager(7837): Instantiated fragment TitleFragment{42636b58 #0 id=0x7f090041}
10-19 00:59:58.339: V/FragmentManager(7837): restoreAllState: active #0: TitleFragment{42636b58 #0 id=0x7f090041}
10-19 00:59:58.339: V/FragmentManager(7837): restoreAllState: added #0: TitleFragment{42636b58 #0 id=0x7f090041}
10-19 00:59:58.339: V/FragmentManager(7837): onCreateView: id=0x7f090041 fname=com.example.fragmentlifetimetest.TitleFragment existing=TitleFragment{42636b58 #0 id=0x7f090041}
10-19 00:59:58.339: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onInflate is called!
10-19 00:59:58.349: V/FragmentLifeTimeTest Log:(7837): id = @2131296321
10-19 00:59:58.349: V/FragmentLifeTimeTest Log:(7837): background = #550033
10-19 00:59:58.349: V/FragmentLifeTimeTest Log:(7837): layout_width = 0.0px
10-19 00:59:58.349: V/FragmentLifeTimeTest Log:(7837): layout_height = -1
10-19 00:59:58.349: V/FragmentLifeTimeTest Log:(7837): layout_weight = 1.0
10-19 00:59:58.349: V/FragmentLifeTimeTest Log:(7837): class = com.example.fragmentlifetimetest.TitleFragment
10-19 00:59:58.349: V/FragmentManager(7837): moveto CREATED: TitleFragment{42636b58 #0 id=0x7f090041}
10-19 00:59:58.349: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onAttach is called!
10-19 00:59:58.349: V/FragmentLifeTimeTest Log:(7837): in MainActivity onAttachFragment. fragment id = 2131296321
10-19 00:59:58.349: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onCreate is called!
10-19 00:59:58.349: V/FragmentLifeTimeTest Log:(7837): Key=android:view_state
10-19 00:59:58.349: V/FragmentLifeTimeTest Log:(7837): Key=curChoice
10-19 00:59:58.349: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onCreateView is called!
10-19 00:59:58.349: V/FragmentLifeTimeTest Log:(7837): MainActivity.onStart is called!
10-19 00:59:58.349: V/FragmentManager(7837): moveto ACTIVITY_CREATED: TitleFragment{42636b58 #0 id=0x7f090041}
10-19 00:59:58.349: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onActivityCreated is called!
10-19 00:59:58.349: V/FragmentLifeTimeTest Log:(7837): Key=android:view_state
10-19 00:59:58.349: V/FragmentLifeTimeTest Log:(7837): Key=curChoice
10-19 00:59:58.359: V/FragmentLifeTimeTest Log:(7837): MainActivity.showDetail is called!
10-19 00:59:58.359: V/FragmentLifeTimeTest Log:(7837): about to run FragmentTransaction...
10-19 00:59:58.359: V/FragmentLifeTimeTest Log:(7837): DetailFragment.newInstance(int) called! index=3
10-19 00:59:58.359: V/FragmentManager(7837): Commit: BackStackEntry{42640dc0}
10-19 00:59:58.359: D/FragmentManager(7837):   mName=null mIndex=-1 mCommitted=false
10-19 00:59:58.359: D/FragmentManager(7837):   mEnterAnim=#10a0000 mExitAnim=#10a0001
10-19 00:59:58.359: D/FragmentManager(7837):   Operations:
10-19 00:59:58.359: D/FragmentManager(7837):     Op #0: REPLACE DetailFragment{42640c38 id=0x7f090042}
10-19 00:59:58.359: D/FragmentManager(7837):   enterAnim=#10a0000 exitAnim=#10a0001
10-19 00:59:58.359: V/FragmentManager(7837): Run: BackStackEntry{42640dc0}
10-19 00:59:58.359: V/FragmentManager(7837): OP_REPLACE: adding=DetailFragment{42640c38 id=0x7f090042} old=TitleFragment{42636b58 #0 id=0x7f090041}
10-19 00:59:58.359: V/FragmentManager(7837): add: DetailFragment{42640c38 id=0x7f090042}
10-19 00:59:58.359: V/FragmentManager(7837): Allocated fragment index DetailFragment{42640c38 #1 id=0x7f090042}
10-19 00:59:58.359: V/FragmentManager(7837): moveto CREATED: DetailFragment{42640c38 #1 id=0x7f090042}
10-19 00:59:58.359: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onAttach called!
10-19 00:59:58.359: V/FragmentLifeTimeTest Log:(7837): in MainActivity onAttachFragment. fragment id = 2131296322
10-19 00:59:58.359: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onCreate called!
10-19 00:59:58.359: V/FragmentLifeTimeTest Log:(7837): savedInstanceState is null!
10-19 00:59:58.359: V/FragmentManager(7837): moveto ACTIVITY_CREATED: DetailFragment{42640c38 #1 id=0x7f090042}
10-19 00:59:58.359: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onCreateView called!
10-19 00:59:58.369: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onActivityCreated called!
10-19 00:59:58.369: V/FragmentLifeTimeTest Log:(7837): savedInstanceState is null!
10-19 00:59:58.369: V/FragmentManager(7837): moveto STARTED: TitleFragment{42636b58 #0 id=0x7f090041}
10-19 00:59:58.369: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onStart is called!
10-19 00:59:58.369: V/FragmentManager(7837): moveto STARTED: DetailFragment{42640c38 #1 id=0x7f090042}
10-19 00:59:58.369: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onStart called!
10-19 00:59:58.369: V/FragmentLifeTimeTest Log:(7837): MainActivity.onResume is called!
10-19 00:59:58.369: V/FragmentManager(7837): moveto RESUMED: TitleFragment{42636b58 #0 id=0x7f090041}
10-19 00:59:58.369: V/FragmentLifeTimeTest Log:(7837): TitleFragment.onResume is called!
10-19 00:59:58.369: V/FragmentManager(7837): moveto RESUMED: DetailFragment{42640c38 #1 id=0x7f090042}
10-19 00:59:58.369: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onResume called!
10-19 00:59:58.489: V/FragmentLifeTimeTest Log:(7837): DetailActivity.onDestroy begin
10-19 00:59:58.489: V/FragmentManager(7837): moveto ACTIVITY_CREATED: DetailFragment{42633190 #0 id=0x1020002}
10-19 00:59:58.489: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onCreateView called!
10-19 00:59:58.489: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onActivityCreated called!
10-19 00:59:58.489: V/FragmentLifeTimeTest Log:(7837): key=android:view_state
10-19 00:59:58.489: V/FragmentManager(7837): movefrom ACTIVITY_CREATED: DetailFragment{42633190 #0 id=0x1020002}
10-19 00:59:58.489: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onDestroyView called! view=android.support.v4.app.NoSaveStateFrameLayout@42853930
10-19 00:59:58.489: V/FragmentManager(7837): movefrom CREATED: DetailFragment{42633190 #0 id=0x1020002}
10-19 00:59:58.489: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onDestroy called!
10-19 00:59:58.489: V/FragmentLifeTimeTest Log:(7837): DetailFragment.onDetach called!
10-19 00:59:58.489: V/FragmentManager(7837): Freeing fragment index DetailFragment{42633190 #0 id=0x1020002}
 
   

转载于:https://www.cnblogs.com/manziluo/p/5800390.html

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