InputDispatch - Keyevent分发

[-> InputDispatcher.cpp]

bool InputDispatcherThread::threadLoop() {

    mDispatcher->dispatchOnce();

    return true;

}

//将NotifyKeyArgs封装的事件信息解析出来，构造两个结构体KeyEvent和KeyEntry，为什么是两个？因为KeyEvent是会首先传递到java层的PhoneWindowManager中去判断是否将此事件加入分发队列

InputDispatcher::notifyKey

    // 构建KeyEvent event;

    event.initialize...

    mPolicy->interceptKeyBeforeQueueing(&event, policyFlags);//mPolicy指向NativeInputManager，这个函数最终会通过JNI调到java层PhoneWindowManager

    (1)AccessibilityService辅助服务拦截注入Input事件   IMS:AccessibilityService辅助服务拦截注入Input事件_accessibility inputfilter-优快云博客

    shouldSendKeyToInputFilterLocked?

        mPolicy->filterInputEvent(&event, policyFlags)

            AccessibilityManagerService->  mInputFilter.sendInputEvent

                -> InputFilter::sendInputEvent

                    -> mHost.sendInputEvent

                        -> InputFilterHost.sendInputEvent