// This is the top-level view of the window, containing the window decor.private DecorView mDecor;

于是我想看看它是什么时候创建的：


只有函数 generateDecor 中 new 了 DecorView 实例，所以我们本应搜索函数 installDecor 的使用，但 getDecorView 中调用了 installDeocr，所以我们搜索构造函数 PhoneWindow 的使用了，使用连接：
http://localhost:8888/method_usage:android.app:Activity,ActivityThread,LocalActivityManager&android.widget:TabHost&com.android.internal.policy:PhoneWindow@com.android.internal.policy.PhoneWindow.PhoneWindow::Context,Window:

单从名字上看，我决定先看第一个：android.app.ActivityThread.H.handleMessage::Message:

在 handleMessage 中调用了函数 handleLaunchActivity，我们看看源码：

        public void handleMessage(Message msg) {if (DEBUG_MESSAGES) Slog.v(TAG, ">>> handling: " + codeToString(msg.what));switch (msg.what) {case LAUNCH_ACTIVITY: {Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "activityStart");final ActivityClientRecord r = (ActivityClientRecord) msg.obj;r.packageInfo = getPackageInfoNoCheck(r.activityInfo.applicationInfo, r.compatInfo);handleLaunchActivity(r, null, "LAUNCH_ACTIVITY");                   // 这里调用Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);} break;。。。。。。

其中属性 LAUNCH_ACTIVITY 是消息发送与接收的连接点，它的使用情况：

这是这个属性惟一被传入函数 sendMessage 的地方：android.app.ActivityThread.ApplicationThread.scheduleLaunchActivity::Intent,IBinder,int,ActivityInfo,Configuration,Configuration,CompatibilityInfo,String,IVoiceInteractor,int,Bundle,PersistableBundle,List,List,boolean,boolean,ProfilerInfo:
所以我们看这个函数的使用情况，由于此函数重写自父类，所以我们看函数：android.app.IApplicationThread.scheduleLaunchActivity::Intent,IBinder,int,ActivityInfo,Configuration,Configuration,CompatibilityInfo,String,IVoiceInteractor,int,Bundle,PersistableBundle,List,List,boolean,boolean,ProfilerInfo:
它只被函数 android.app.ApplicationThreadNative.onTransact::int,Parcel,Parcel,int: 调用，源码：

@Overridepublic boolean onTransact(int code, Parcel data, Parcel reply, int flags)throws RemoteException {switch (code) {。。。。。。case SCHEDULE_LAUNCH_ACTIVITY_TRANSACTION:{。。。。。。scheduleLaunchActivity(intent, b, ident, info, curConfig, overrideConfig, compatInfo,referrer, voiceInteractor, procState, state, persistentState, ri, pi,notResumed, isForward, profilerInfo);                // 这里调用return true;}。。。。。。

到这里我找不下去了，它使用的进程间通信机制我还不会用，所以到这里总结一下吧

android.app.ApplicationThreadNative.onTransact::int,Parcel,Parcel,int:（SCHEDULE_LAUNCH_ACTIVITY_TRANSACTION）
android.app.IApplicationThread.scheduleLaunchActivity::Intent,IBinder,int,ActivityInfo,Configuration,Configuration,CompatibilityInfo,String,IVoiceInteractor,int,Bundle,PersistableBundle,List,List,boolean,boolean,ProfilerInfo:
。。。。。。。。。。。。。。。。。。。。。多态。。。。。。。。。。。。。。。。。。。。
android.app.ActivityThread.ApplicationThread.scheduleLaunchActivity::Intent,IBinder,int,ActivityInfo,Configuration,Configuration,CompatibilityInfo,String,IVoiceInteractor,int,Bundle,PersistableBundle,List,List,boolean,boolean,ProfilerInfo:
android.app.ActivityThread.sendMessage::int,Object:（LAUNCH_ACTIVITY）
。。。。。。。。。。。。。。。。。。handler 。。。。。。。。。。。。。。。。。。。。。
android.app.ActivityThread.H.handleMessage::Message:
android.app.ActivityThread.handleLaunchActivity::ActivityClientRecord,Intent,String:
android.app.ActivityThread.performLaunchActivity::ActivityClientRecord,Intent:
android.app.Activity.attach::Context,ActivityThread,Instrumentation,IBinder,int,Application,Intent,ActivityInfo,CharSequence,Activity,String,NonConfigurationInstances,Configuration,String,IVoiceInteractor,Window:
com.android.internal.policy.PhoneWindow.PhoneWindow::Context,Window:
android.view.Window.getDecorView:::
。。。。。。。。。。。。。。。。。。。多态。。。。。。。。。。。。。。。。。。。。。。
com.android.internal.policy.PhoneWindow.getDecorView:::
com.android.internal.policy.PhoneWindow.installDecor:::
com.android.internal.policy.PhoneWindow.generateDecor::int:
com.android.internal.policy.DecorView.DecorView::Context,int,PhoneWindow,WindowManager.LayoutParams: