ViewRootImpl src track

ActivityThread.java:
private Activity performLaunchActivity(ActivityClientRecord r, Intent customIntent) {
...........................................................
activity.attach(appContext, this, getInstrumentation(), r.token,
                        r.ident, app, r.intent, r.activityInfo, title, r.parent,
                        r.embeddedID, r.lastNonConfigurationInstances, config);
...........................................................
}

Activity.java:(mWindow 由 Policy.java的makeNewWindow(Context context) 生成)
final void attach(Context context, ActivityThread aThread,
            Instrumentation instr, IBinder token, int ident,
            Application application, Intent intent, ActivityInfo info,
            CharSequence title, Activity parent, String id,
            NonConfigurationInstances lastNonConfigurationInstances,
            Configuration config) {
		...................................
	    mWindow.setWindowManager(
                (WindowManager)context.getSystemService(Context.WINDOW_SERVICE),
                mToken, mComponent.flattenToString(),
                (info.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0);
}



Window.java:
    /**
     * Set the window manager for use by this Window to, for example,
     * display panels.  This is <em>not</em> used for displaying the
     * Window itself -- that must be done by the client.
     *
     * @param wm The window manager for adding new windows.
     */
    public void setWindowManager(WindowManager wm, IBinder appToken, String appName,
            boolean hardwareAccelerated) {
	.......................................................................
        mWindowManager = ((WindowManagerImpl)wm).createLocalWindowManager(this);
    }

WindowManagerImpl.java:
private final WindowManagerGlobal mGlobal = WindowManagerGlobal.getInstance();

WindowManagerGlobal:

    public void addView(View view, ViewGroup.LayoutParams params,
            Display display, Window parentWindow) {
..............................................
root = new ViewRootImpl(view.getContext(), display);
..............................................
root.setView(view, wparams, panelParentView);
..............................................
}

这个加入到ViewRootImpl中的view是：
PhoneWindow中的
private void openPanel(final PanelFeatureState st, KeyEvent event) {
.........................................................
	final WindowManager wm = getWindowManager();
.........................................................
wm.addView(st.decorView, lp);
.........................................................

}

ViewRootImpl.java:
public ViewRootImpl(Context context, Display display) {
...................................................
mAttachInfo = new View.AttachInfo(mWindowSession, mWindow, display, this, mHandler, this);
...................................................
}

ViewRootImpl.Java
private void performTraversals() {
final View host = mView;
..............................................
只有在mFirst时才进行:
mFirst在ViewRootImpl时是true,
在performTraversals()一次以后就变成了false.
host.dispatchAttachedToWindow(attachInfo, 0);
.............................................
}

ViewGroup.java:
void dispatchAttachedToWindow(AttachInfo info, int visibility) {
......................................
	for (int i = 0; i < count; i++) {
            final View child = children[i];
            child.dispatchAttachedToWindow(info,
                    visibility | (child.mViewFlags & VISIBILITY_MASK));
        }
}

View.java:
void dispatchAttachedToWindow(AttachInfo info, int visibility) {
mAttachInfo = info;
.............
onAttachedToWindow();
}