Android 5.0 Input初始化

android\frameworks\base\services\java\com\android\server\SystemServer.java

Slog.i(TAG, "Input Manager");
inputManager = new InputManagerService(context);
......
inputManager.setWindowManagerCallbacks(wm.getInputMonitor());
inputManager.start();         

android\frameworks\base\services\core\java\com\android\server\input\InputManagerService.java

    public InputManagerService(Context context) {
        this.mContext = context;
        this.mHandler = new InputManagerHandler(DisplayThread.get().getLooper());

        mUseDevInputEventForAudioJack =
                context.getResources().getBoolean(R.bool.config_useDevInputEventForAudioJack);
        Slog.i(TAG, "Initializing input manager, mUseDevInputEventForAudioJack="
                + mUseDevInputEventForAudioJack);
        mPtr = **nativeInit**(this, mContext, mHandler.getLooper().getQueue());

        LocalServices.addService(InputManagerInternal.class, new LocalService());
    }
    ......
    public void start() {
        Slog.i(TAG, "Starting input manager");
        nativeStart(mPtr);
    ......

android\frameworks\base\services\core\jni\com_android_server_input_InputManagerService.cpp

static jlong nativeInit(JNIEnv* env, jclass clazz,
        jobject serviceObj, jobject contextObj, jobject messageQueueObj) {
    sp messageQueue = android_os_MessageQueue_getMessageQueue(env, messageQueueObj);
    if (messageQueue == NULL) {
        jniThrowRuntimeException(env, "MessageQueue is not initialized.");
        return 0;
    }

    NativeInputManager* im = new NativeInputManager(contextObj, serviceObj,
            messageQueue->getLooper());
    im->incStrong(0);
    return reinterpret_cast(im);
}

static void nativeStart(JNIEnv* env, jclass clazz, jlong ptr) {
    NativeInputManager* im = reinterpret_cast(ptr);

    status_t result = im->getInputManager()->start();
    if (result) {
        jniThrowRuntimeException(env, "Input manager could not be started.");
    }
}
......
NativeInputManager::NativeInputManager(jobject contextObj,
        jobject serviceObj, const sp& looper) :
        mLooper(looper), mInteractive(true) {
    JNIEnv* env = jniEnv();

    mContextObj = env->NewGlobalRef(contextObj);
    mServiceObj = env->NewGlobalRef(serviceObj);

    {
        AutoMutex _l(mLock);
        mLocked.systemUiVisibility = ASYSTEM_UI_VISIBILITY_STATUS_BAR_VISIBLE;
        mLocked.pointerSpeed = 0;
        mLocked.pointerGesturesEnabled = true;
        mLocked.showTouches = false;
    }

    sp eventHub = new EventHub();
    mInputManager = new InputManager(eventHub, this, this);
}

android\frameworks\native\services\inputflinger\InputManager.cpp

status_t InputManager::start() {
    status_t result = mDispatcherThread->run("InputDispatcher", PRIORITY_URGENT_DISPLAY);
    if (result) {
        ALOGE("Could not start InputDispatcher thread due to error %d.", result);
        return result;
    }

    result = mReaderThread->run("InputReader", PRIORITY_URGENT_DISPLAY);
    if (result) {
        ALOGE("Could not start InputReader thread due to error %d.", result);

        mDispatcherThread->requestExit();
        return result;
    }
......

android\frameworks\native\services\inputflinger\InputDispatcher.cpp

bool InputDispatcherThread::threadLoop() {
    mDispatcher->dispatchOnce();
    return true;
}

android\frameworks\native\services\inputflinger\InputReader.cpp

bool InputReaderThread::threadLoop() {
    mReader->loopOnce();
    return true;
}