953    public static WindowManagerService main(final Context context, final InputManagerService im,
954            final boolean haveInputMethods, final boolean showBootMsgs, final boolean onlyCore,
955            WindowManagerPolicy policy) {
956        DisplayThread.getHandler().runWithScissors(() ->
957                sInstance = new WindowManagerService(context, im, haveInputMethods, showBootMsgs,
958                        onlyCore, policy), 0);
959        return sInstance;
960    }

978    private WindowManagerService(Context context, InputManagerService inputManager,
979            boolean haveInputMethods, boolean showBootMsgs, boolean onlyCore,
980            WindowManagerPolicy policy) {
...
1000        mInputManager = inputManager; // Must be before createDisplayContentLocked.
1001        mDisplayManagerInternal = LocalServices.getService(DisplayManagerInternal.class);
1002        mDisplaySettings = new DisplaySettings();
1003        mDisplaySettings.readSettingsLocked();
1005        mPolicy = policy;
1006        mAnimator = new WindowAnimator(this);//window动画的
1007        mRoot = new RootWindowContainer(this);
....    
1057        mAppTransition = new AppTransition(context, this);
1058        mAppTransition.registerListenerLocked(mActivityManagerAppTransitionNotifier);
....
1064        mActivityManager = ActivityManager.getService();
...    注册了appops和pms的监听

1134    public void onInitReady() {
1135        initPolicy();//初始化phonewindowmanager

962    private void initPolicy() {
963        UiThread.getHandler().runWithScissors(new Runnable() {
964            @Override
965            public void run() {
966                WindowManagerPolicyThread.set(Thread.currentThread(), Looper.myLooper());
967                mPolicy.init(mContext, WindowManagerService.this, WindowManagerService.this);
968            }
969        }, 0);
970    }

略(配置了相关的phone策略)

4800    public void displayReady() {
4801        final int displayCount = mRoot.mChildren.size();
4802        for (int i = 0; i < displayCount; ++i) {
4803            final DisplayContent display = mRoot.mChildren.get(i);
4804            displayReady(display.getDisplayId());
4805        }
4806
4807
4808        synchronized(mWindowMap) {
4809            final DisplayContent displayContent = getDefaultDisplayContentLocked();
4810            if (mMaxUiWidth > 0) {
4811                displayContent.setMaxUiWidth(mMaxUiWidth);
4812            }
4813            readForcedDisplayPropertiesLocked(displayContent);
4814            mDisplayReady = true;
4815        }
4816
4817        try {
4818            mActivityManager.updateConfiguration(null);
4819        } catch (RemoteException e) {
4820        }
4821
4822        synchronized(mWindowMap) {
4823            mIsTouchDevice = mContext.getPackageManager().hasSystemFeature(
4824                    PackageManager.FEATURE_TOUCHSCREEN);
4825            getDefaultDisplayContentLocked().configureDisplayPolicy();
4826        }
4827
4828        try {
4829            mActivityManager.updateConfiguration(null);
4830        } catch (RemoteException e) {
4831        }
4832
4833        updateCircularDisplayMaskIfNeeded();
4834    }

4847    public void systemReady() {
4848        mPolicy.systemReady();
4849        mTaskSnapshotController.systemReady();
4850        mHasWideColorGamutSupport = queryWideColorGamutSupport();
4854    }

7922    public void systemReady() {
7923        // In normal flow, systemReady is called before other system services are ready.
7924        // So it is better not to bind keyguard here.
7925        mKeyguardDelegate.onSystemReady();
7926
7927        mVrManagerInternal = LocalServices.getService(VrManagerInternal.class);
7928        if (mVrManagerInternal != null) {
7929            mVrManagerInternal.addPersistentVrModeStateListener(mPersistentVrModeListener);
7930        }
7931
7932        readCameraLensCoverState();
7933        updateUiMode();
7934        synchronized (mLock) {
7935            updateOrientationListenerLp();
7936            mSystemReady = true;
7937            mHandler.post(new Runnable() {
7938                @Override
7939                public void run() {
7940                    updateSettings();
7941                }
7942            });
7943            // If this happens, for whatever reason, systemReady came later than systemBooted.
7944            // And keyguard should be already bound from systemBooted
7945            if (mSystemBooted) {
7946                mKeyguardDelegate.onBootCompleted();
7947            }
7948        }
7949
7950        mSystemGestures.systemReady();
7951        mImmersiveModeConfirmation.systemReady();
7952
7953        mAutofillManagerInternal = LocalServices.getService(AutofillManagerInternal.class);
7954    }