anr 原理
anr 分类
input 超时
普通：5000ms Instrumentation：60000ms
由 InputDispatcher 分发事件时上报
—> native 层 InputDispatcherThread::threadLoop() -> InputDispatcher::dispatchOnce() -> dispatchOnceInnerLocked() -> dispatchMotionLocked() -> findTouchedWindowTargetsLocked() -> handleTargetsNotReadyLocked() -> onANRLocked() -> doNotifyANRLockedInterruptible() -> InputDispatcherPolicyInterface::notifyANR() -> –> jni 调用 NativeInputManager::notifyANR() -> —> Java 层 IMS#notifyANR() -> WindowManagerCallbacks#notifyANR() -> InputMonitor#notifyANR() -> AMS#inputDispatchingTimedOut() -> inputDispatchingTimedOut() -> AppErrors#appNotResponding() -> AMS#SHOW_NOT_RESPONDING_UI_MSG -> AppErrors#handleShowAnrUi() -> 显示 ANR 弹窗