Java 类android.view.ViewRootImpl 实例源码

private void attach(boolean system) {
    sCurrentActivityThread = this;
    mSystemThread = system;
    if (!system) {
        ViewRootImpl.addFirstDrawHandler(new Runnable() {
            @Override
            public void run() {
                ensureJitEnabled();
            }
        });
        //android.ddm.DdmHandleAppName.setAppName("<pre-initialized>",
 //                                      UserHandle.myUserId());
        RuntimeInit.setApplicationObject(mAppThread.asBinder());
        IActivityManager mgr = ActivityManagerNative.getDefault();
        try {
            mgr.attachApplication(mAppThread);
        } catch (RemoteException ex) {
            // Ignore
        }
    } else {
        // Don't set application object here -- if the system crashes,
        // we can't display an alert, we just want to die die die.
        //android.ddm.DdmHandleAppName.setAppName("system_process",
        //                                        UserHandle.myUserId());
        try {
            mInstrumentation = new Instrumentation();
            ContextImpl context = new ContextImpl();
            context.init(getSystemContext().mPackageInfo, null, this);
            Application app = Instrumentation.newApplication(Application.class, context);
            mAllApplications.add(app);
            mInitialApplication = app;
            app.onCreate();
        } catch (Exception e) {
            throw new RuntimeException(
                    "Unable to instantiate Application():" + e.toString(), e);
        }
    }

    // add dropbox logging to libcore
    //DropBox.setReporter(new DropBoxReporter());

    ViewRootImpl.addConfigCallback(new ComponentCallbacks2() {
        @Override
        public void onConfigurationChanged(Configuration newConfig) {
            synchronized (mResourcesManager) {
                // We need to apply this change to the resources
                // immediately, because upon returning the view
                // hierarchy will be informed about it.
                if (mResourcesManager.applyConfigurationToResourcesLocked(newConfig, null)) {
                    // This actually changed the resources!  Tell
                    // everyone about it.
                    if (mPendingConfiguration == null ||
                            mPendingConfiguration.isOtherSeqNewer(newConfig)) {
                        mPendingConfiguration = newConfig;

                        sendMessage(H.CONFIGURATION_CHANGED, newConfig);
                    }
                }
            }
        }
        @Override
        public void onLowMemory() {
        }
        @Override
        public void onTrimMemory(int level) {
        }
    });
}