android - 来自 Google Analytics for Android 的 RuntimeException "sending message to a handler on a dead thread"

Question

我正在使用适用于 Android 的 Google Analytics(分析)来跟踪 Android 应用程序上的事件和页面浏览量。调用跟踪器的调度方法时，我收到一个 RuntimeException:

07-12 18:02:05.594: WARN/MessageQueue(12823): Handler{44a08620} sending message to a Handler on a dead thread
07-12 18:02:05.594: WARN/MessageQueue(12823): java.lang.RuntimeException: Handler{44a08620} sending message to a Handler on a dead thread
07-12 18:02:05.594: WARN/MessageQueue(12823):     at android.os.MessageQueue.enqueueMessage(MessageQueue.java:179)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at android.os.Handler.sendMessageAtTime(Handler.java:457)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at android.os.Handler.sendMessageDelayed(Handler.java:430)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at android.os.Handler.post(Handler.java:248)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at com.google.android.apps.analytics.NetworkDispatcher$DispatcherThread.dispatchEvents(Unknown Source)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at com.google.android.apps.analytics.NetworkDispatcher.dispatchEvents(Unknown Source)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at com.google.android.apps.analytics.GoogleAnalyticsTracker.dispatch(Unknown Source)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at com.company.activity.set(MyActivity.java:177)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at com.company.activity.access$34(MyActivity.java:175)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at com.company.activity.$45.onClick(MyActivity.java:1982)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:158)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at android.os.Handler.dispatchMessage(Handler.java:99)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at android.os.Looper.loop(Looper.java:123)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at android.app.ActivityThread.main(ActivityThread.java:4627)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at java.lang.reflect.Method.invokeNative(Native Method)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at java.lang.reflect.Method.invoke(Method.java:521)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-12 18:02:05.594: WARN/MessageQueue(12823):     at dalvik.system.NativeStart.main(Native Method)

--编辑-- 起初我确信它与我放置跟踪器有关，将它放在 onResume、Threads 等中，神奇地使其抛出异常。原来，Google's own example code (也可在他们的 SDK 下载中获得)也抛出此异常:

>07-12 23:47:09.343: WARN/MessageQueue(18468): null sending message to a Handler on a dead thread
07-12 23:47:09.343: WARN/MessageQueue(18468): java.lang.RuntimeException: null sending message to a Handler on a dead thread
07-12 23:47:09.343: WARN/MessageQueue(18468):     at android.os.MessageQueue.enqueueMessage(MessageQueue.java:179)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at android.os.Looper.quit(Looper.java:173)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at com.google.android.apps.analytics.NetworkDispatcher.stop(Unknown Source)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at com.google.android.apps.analytics.NetworkDispatcher.init(Unknown Source)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at com.google.android.apps.analytics.GoogleAnalyticsTracker.start(Unknown Source)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at com.google.android.apps.analytics.GoogleAnalyticsTracker.start(Unknown Source)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at com.google.android.apps.analytics.GoogleAnalyticsTracker.start(Unknown Source)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at com.google.android.apps.analytics.sample.AnalyticsSample.onCreate(AnalyticsSample.java:23)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3815)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at android.app.ActivityThread.access$2400(ActivityThread.java:125)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2037)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at android.os.Handler.dispatchMessage(Handler.java:99)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at android.os.Looper.loop(Looper.java:123)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at android.app.ActivityThread.main(ActivityThread.java:4627)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at java.lang.reflect.Method.invokeNative(Native Method)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at java.lang.reflect.Method.invoke(Method.java:521)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-12 23:47:09.343: WARN/MessageQueue(18468):     at dalvik.system.NativeStart.main(Native Method)

当您强制销毁原始 Activity(即改变方向、转到主屏幕等)时会发生这种情况。我无法通过 onSavedInstance 存储原始跟踪器对象，因为跟踪器不是 Parcelable。任何其他想法，线索如何摆脱这个错误？

--编辑-- 更奇怪的是，这似乎也导致了以下问题:

>07-13 00:50:02.581: WARN/googleanalytics(27605): Dispatcher thinks it finished, but there were -4 failed events

虽然大多数在线提及此问题的人都将手指指向破坏数据库的事件或页面 View 中的空格，但我已经确认情况并非如此。另外，我不确定负面事件 (-4) 意味着什么!

Answer 1

您可以在 onPause() 中执行调度

tracker.dispatch();

避免丢失数据然后重新创建跟踪器