解释ANR堆栈跟踪

我正在使用Android中PAHO库的MQTT客户端的实现。有时候，当它试图发布一条消息（我认为）时，该应用程序会被锁定，我无法弄清楚发生了什么。解释ANR堆栈跟踪

我也为所有长期发帖道歉。我真的不知道重要的位是什么，所以SO“扰流板”标签>!将无法隐藏细节。

MQTT客户端正在单独的线程中工作，但我从UI线程调用mqtt客户端实例。也许这会导致锁定？我是否应该将客户端定义为线程的实例，并在将该操作转发给客户端的线程中调用方法？

当应用程序挂起，过了一段时间ANR开始并要求关闭应用程序。当我这样做，我得到以下堆栈跟踪我的过程从/data/anr/traces.txt：

DALVIK THREADS: 
(mutexes: tll=0 tsl=0 tscl=0 ghl=0) 
"main" prio=5 tid=1 WAIT 
    | group="main" sCount=1 dsCount=0 obj=0x40a59460 self=0x109d828 
    | sysTid=22050 nice=0 sched=0/0 cgrp=default handle=1074492552 
    | schedstat=(8524633000 459501000 2204) utm=827 stm=25 core=1 
    at java.lang.Object.wait(Native Method) 
    - waiting on <0x410f4bd0> (a java.lang.Object) 
    at java.lang.Object.wait(Object.java:364) 
    at org.eclipse.paho.client.mqttv3.internal.MqttDeliveryTokenImpl.waitUntilSent(MqttDeliveryTokenImpl.java:120) 
    at org.eclipse.paho.client.mqttv3.internal.ClientComms.internalSend(ClientComms.java:85) 
    at org.eclipse.paho.client.mqttv3.internal.ClientComms.sendNoWait(ClientComms.java:118) 
    at org.eclipse.paho.client.mqttv3.MqttTopic.publish(MqttTopic.java:62) 
    at se.chalmers.pd.dashboard.MqttWorker.publish(MqttWorker.java:177) 
    at se.chalmers.pd.dashboard.ApplicationController.sendResponse(ApplicationController.java:238) 
    at se.chalmers.pd.dashboard.ApplicationController.onLoadComplete(ApplicationController.java:358) 
    at se.chalmers.pd.dashboard.MainActivity$CustomWebViewClient.onPageFinished(MainActivity.java:89) 
    at android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:275) 
    at android.os.Handler.dispatchMessage(Handler.java:99) 
    at android.os.Looper.loop(Looper.java:137) 
    at android.app.ActivityThread.main(ActivityThread.java:4424) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:511) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
    at dalvik.system.NativeStart.main(Native Method) 

"Thread-3645" prio=5 tid=12 NATIVE 
    | group="main" sCount=1 dsCount=0 obj=0x4111a5f8 self=0x13cc698 
    | sysTid=22083 nice=0 sched=0/0 cgrp=default handle=19370528 
    | schedstat=(35731000 17350000 70) utm=1 stm=2 core=0 
    at dalvik.system.NativeStart.run(Native Method) 

"MQTT Client Callback" prio=5 tid=17 WAIT 
    | group="main" sCount=1 dsCount=0 obj=0x41118bf0 self=0x13bb500 
    | sysTid=22082 nice=0 sched=0/0 cgrp=default handle=20691280 
    | schedstat=(392860000 110613000 493) utm=35 stm=4 core=1 
    at java.lang.Object.wait(Native Method) 
    - waiting on <0x410d1c48> (a java.lang.Object) 
    at java.lang.Object.wait(Object.java:364) 
    at org.eclipse.paho.client.mqttv3.internal.MqttDeliveryTokenImpl.waitUntilSent(MqttDeliveryTokenImpl.java:120) 
    at org.eclipse.paho.client.mqttv3.internal.ClientComms.internalSend(ClientComms.java:85) 
    at org.eclipse.paho.client.mqttv3.internal.ClientComms.sendNoWait(ClientComms.java:118) 
    at org.eclipse.paho.client.mqttv3.MqttTopic.publish(MqttTopic.java:62) 
    at se.chalmers.pd.dashboard.MqttWorker.publish(MqttWorker.java:177) 
    at se.chalmers.pd.dashboard.ApplicationController.sendResponse(ApplicationController.java:238) 
    at se.chalmers.pd.dashboard.ApplicationController.handleSystemMessage(ApplicationController.java:210) 
    at se.chalmers.pd.dashboard.ApplicationController.onMessage(ApplicationController.java:154) 
    at se.chalmers.pd.dashboard.MqttWorker$1$CustomMqttCallback.notifyCallbacks(MqttWorker.java:133) 
    at se.chalmers.pd.dashboard.MqttWorker$1$CustomMqttCallback.messageArrived(MqttWorker.java:128) 
    at org.eclipse.paho.client.mqttv3.internal.CommsCallback.handleMessage(CommsCallback.java:248) 
    at org.eclipse.paho.client.mqttv3.internal.CommsCallback.run(CommsCallback.java:139) 
    at java.lang.Thread.run(Thread.java:856) 

"MQTT Client Comms Sender" prio=5 tid=16 TIMED_WAIT 
    | group="main" sCount=1 dsCount=0 obj=0x41118ae0 self=0x13bada0 
    | sysTid=22081 nice=0 sched=0/0 cgrp=default handle=20689392 
    | schedstat=(6038000 11147000 189) utm=0 stm=0 core=0 
    at java.lang.Object.wait(Native Method) 
    - waiting on <0x410ffd90> (a java.lang.Object) 
    at java.lang.Object.wait(Object.java:401) 
    at org.eclipse.paho.client.mqttv3.internal.ClientState.get(ClientState.java:555) 
    at org.eclipse.paho.client.mqttv3.internal.CommsSender.run(CommsSender.java:83) 
    at java.lang.Thread.run(Thread.java:856) 

"MQTT Client Comms Receiver" prio=5 tid=15 NATIVE 
    | group="main" sCount=1 dsCount=0 obj=0x41116048 self=0x13ba870 
    | sysTid=22080 nice=0 sched=0/0 cgrp=default handle=20619056 
    | schedstat=(656144000 184252000 2369) utm=59 stm=6 core=1 
    at libcore.io.Posix.recvfromBytes(Native Method) 
    at libcore.io.Posix.recvfrom(Posix.java:131) 
    at libcore.io.BlockGuardOs.recvfrom(BlockGuardOs.java:164) 
    at libcore.io.IoBridge.recvfrom(IoBridge.java:503) 
    at java.net.PlainSocketImpl.read(PlainSocketImpl.java:488) 
    at java.net.PlainSocketImpl.access$000(PlainSocketImpl.java:46) 
    at java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:240) 
    at libcore.io.Streams.readSingleByte(Streams.java:41) 
    at java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:236) 
    at java.io.DataInputStream.readByte(DataInputStream.java:96) 
    at org.eclipse.paho.client.mqttv3.internal.wire.MqttInputStream.readMqttWireMessage(MqttInputStream.java:51) 
    at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:86) 
    at java.lang.Thread.run(Thread.java:856) 

"CookieSyncManager" prio=5 tid=14 NATIVE 
    | group="main" sCount=1 dsCount=0 obj=0x410d0ad0 self=0x1286e20 
    | sysTid=22066 nice=10 sched=0/0 cgrp=bg_non_interactive handle=19445224 
    | schedstat=(562000 10095000 5) utm=0 stm=0 core=0 
    at android.os.MessageQueue.nativePollOnce(Native Method) 
    at android.os.MessageQueue.next(MessageQueue.java:118) 
    at android.os.Looper.loop(Looper.java:118) 
    at android.webkit.WebSyncManager.run(WebSyncManager.java:90) 
    at android.webkit.CookieSyncManager.run(CookieSyncManager.java:61) 
    at java.lang.Thread.run(Thread.java:856) 

"AsyncTask #1" prio=5 tid=13 WAIT 
    | group="main" sCount=1 dsCount=0 obj=0x410d0920 self=0x121f5b0 
    | sysTid=22065 nice=10 sched=0/0 cgrp=bg_non_interactive handle=19335920 
    | schedstat=(5753000 108824000 12) utm=0 stm=0 core=0 
    at java.lang.Object.wait(Native Method) 
    - waiting on <0x410d0ab8> (a java.lang.VMThread) held by tid=13 (AsyncTask #1) 
    at java.lang.Thread.parkFor(Thread.java:1231) 
    at sun.misc.Unsafe.park(Unsafe.java:323) 
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:157) 
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2022) 
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:413) 
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1009) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1069) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) 
    at java.lang.Thread.run(Thread.java:856) 

"WebViewCoreThread" prio=5 tid=11 NATIVE 
    | group="main" sCount=1 dsCount=0 obj=0x410caa38 self=0x1266550 
    | sysTid=22063 nice=0 sched=0/0 cgrp=default handle=18808064 
    | schedstat=(273871000 128721000 264) utm=20 stm=7 core=0 
    at android.os.MessageQueue.nativePollOnce(Native Method) 
    at android.os.MessageQueue.next(MessageQueue.java:118) 
    at android.os.Looper.loop(Looper.java:118) 
    at android.webkit.WebViewCore$WebCoreThread.run(WebViewCore.java:728) 
    at java.lang.Thread.run(Thread.java:856) 

"Binder Thread #2" prio=5 tid=10 NATIVE 
    | group="main" sCount=1 dsCount=0 obj=0x410c1ef0 self=0x129de58 
    | sysTid=22062 nice=0 sched=0/0 cgrp=default handle=19025912 
    | schedstat=(1983000 23992000 8) utm=0 stm=0 core=1 
    at dalvik.system.NativeStart.run(Native Method) 

"Binder Thread #1" prio=5 tid=9 NATIVE 
    | group="main" sCount=1 dsCount=0 obj=0x410ba370 self=0x127cc90 
    | sysTid=22061 nice=0 sched=0/0 cgrp=default handle=18949528 
    | schedstat=(2932000 32665000 18) utm=0 stm=0 core=0 
    at dalvik.system.NativeStart.run(Native Method) 

"FinalizerWatchdogDaemon" daemon prio=5 tid=8 TIMED_WAIT 
    | group="main" sCount=1 dsCount=0 obj=0x410b6320 self=0x1227790 
    | sysTid=22059 nice=0 sched=0/0 cgrp=default handle=19405328 
    | schedstat=(3721000 6943000 27) utm=0 stm=0 core=0 
    at java.lang.VMThread.sleep(Native Method) 
    at java.lang.Thread.sleep(Thread.java:1031) 
    at java.lang.Thread.sleep(Thread.java:1013) 
    at java.lang.Daemons$FinalizerWatchdogDaemon.run(Daemons.java:213) 
    at java.lang.Thread.run(Thread.java:856) 

"FinalizerDaemon" daemon prio=5 tid=7 WAIT 
    | group="main" sCount=1 dsCount=0 obj=0x410b61c8 self=0x12207b8 
    | sysTid=22058 nice=0 sched=0/0 cgrp=default handle=19405208 
    | schedstat=(1055000 601000 7) utm=0 stm=0 core=1 
    at java.lang.Object.wait(Native Method) 
    - waiting on <0x40a4f5d0> (a java.lang.ref.ReferenceQueue) 
    at java.lang.Object.wait(Object.java:401) 
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:102) 
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:73) 
    at java.lang.Daemons$FinalizerDaemon.run(Daemons.java:168) 
    at java.lang.Thread.run(Thread.java:856) 

"ReferenceQueueDaemon" daemon prio=5 tid=6 WAIT 
    | group="main" sCount=1 dsCount=0 obj=0x410b6060 self=0x129d168 
    | sysTid=22057 nice=0 sched=0/0 cgrp=default handle=19404976 
    | schedstat=(573000 395000 11) utm=0 stm=0 core=1 
    at java.lang.Object.wait(Native Method) 
    - waiting on <0x40a4f4f8> 
    at java.lang.Object.wait(Object.java:364) 
    at java.lang.Daemons$ReferenceQueueDaemon.run(Daemons.java:128) 
    at java.lang.Thread.run(Thread.java:856) 

"Compiler" daemon prio=5 tid=5 VMWAIT 
    | group="system" sCount=1 dsCount=0 obj=0x410b5f70 self=0x127c4d0 
    | sysTid=22056 nice=0 sched=0/0 cgrp=default handle=19172728 
    | schedstat=(151015000 59330000 862) utm=9 stm=6 core=0 
    at dalvik.system.NativeStart.run(Native Method) 

"JDWP" daemon prio=5 tid=4 VMWAIT 
    | group="system" sCount=1 dsCount=0 obj=0x410b5e88 self=0x12b39c8 
    | sysTid=22055 nice=0 sched=0/0 cgrp=default handle=19323736 
    | schedstat=(4263000 2800000 18) utm=0 stm=0 core=1 
    at dalvik.system.NativeStart.run(Native Method) 

"Signal Catcher" daemon prio=5 tid=3 RUNNABLE 
    | group="system" sCount=0 dsCount=0 obj=0x410b5d90 self=0x1268fd8 
    | sysTid=22054 nice=0 sched=0/0 cgrp=default handle=19014912 
    | schedstat=(3760000 203000 4) utm=0 stm=0 core=1 
    at dalvik.system.NativeStart.run(Native Method) 

"GC" daemon prio=5 tid=2 VMWAIT 
    | group="system" sCount=1 dsCount=0 obj=0x410b5cb0 self=0x12257d8 
    | sysTid=22053 nice=0 sched=0/0 cgrp=default handle=19042944 
    | schedstat=(271726000 42594000 230) utm=26 stm=1 core=1 
    at dalvik.system.NativeStart.run(Native Method) 

----- end 22050 -----

我开启严格的模式，我得到一些痕迹的地方发出警告磁盘写入，但没有一个是特别长的。这些都是严格模式的痕迹：

> > 04-30 10:29:50.053: D/StrictMode(22229): StrictMode policy violation; 
> > ~duration=35 ms: android.os.StrictMode$StrictModeDiskReadViolation: 
> > policy=31 violation=2 04-30 10:29:50.053: D/StrictMode(22229): at 
> > android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1089) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > libcore.io.BlockGuardOs.open(BlockGuardOs.java:106) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > libcore.io.IoBridge.open(IoBridge.java:390) 04-30 10:29:50.053: 
> > D/StrictMode(22229): at 
> > java.io.FileOutputStream.(FileOutputStream.java:88) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > java.io.FileOutputStream.(FileOutputStream.java:73) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.MqttDefaultFilePersistence.put(MqttDefaultFilePersistence.java:162) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.internal.ClientState.send(ClientState.java:397) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.internal.ClientComms.internalSend(ClientComms.java:81) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.internal.ClientComms.sendNoWait(ClientComms.java:118) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.MqttTopic.publish(MqttTopic.java:62) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > se.chalmers.pd.dashboard.MqttWorker.publish(MqttWorker.java:177) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > se.chalmers.pd.dashboard.ApplicationController.sendResponse(ApplicationController.java:238) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > se.chalmers.pd.dashboard.ApplicationController.onLoadComplete(ApplicationController.java:358) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > se.chalmers.pd.dashboard.MainActivity$CustomWebViewClient.onPageFinished(MainActivity.java:95) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:275) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > android.os.Handler.dispatchMessage(Handler.java:99) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > android.os.Looper.loop(Looper.java:137) 04-30 10:29:50.053: 
> > D/StrictMode(22229): at 
> > android.app.ActivityThread.main(ActivityThread.java:4424) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > java.lang.reflect.Method.invokeNative(Native Method) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > java.lang.reflect.Method.invoke(Method.java:511) 04-30 10:29:50.053: 
> > D/StrictMode(22229): at 
> > com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > dalvik.system.NativeStart.main(Native Method) 04-30 10:29:50.053: 
> 
> 
> > D/StrictMode(22229): StrictMode policy violation; ~duration=26 ms: 
> > android.os.StrictMode$StrictModeDiskWriteViolation: policy=31 
> > violation=1 04-30 10:29:50.053: D/StrictMode(22229): at 
> > android.os.StrictMode$AndroidBlockGuardPolicy.onWriteToDisk(StrictMode.java:1063) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > libcore.io.BlockGuardOs.write(BlockGuardOs.java:190) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > libcore.io.IoBridge.write(IoBridge.java:447) 04-30 10:29:50.053: 
> > D/StrictMode(22229): at 
> > java.io.FileOutputStream.write(FileOutputStream.java:187) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.MqttDefaultFilePersistence.put(MqttDefaultFilePersistence.java:163) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.internal.ClientState.send(ClientState.java:397) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.internal.ClientComms.internalSend(ClientComms.java:81) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.internal.ClientComms.sendNoWait(ClientComms.java:118) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.MqttTopic.publish(MqttTopic.java:62) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > se.chalmers.pd.dashboard.MqttWorker.publish(MqttWorker.java:177) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > se.chalmers.pd.dashboard.ApplicationController.sendResponse(ApplicationController.java:238) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > se.chalmers.pd.dashboard.ApplicationController.onLoadComplete(ApplicationController.java:358) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > se.chalmers.pd.dashboard.MainActivity$CustomWebViewClient.onPageFinished(MainActivity.java:95) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:275) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > android.os.Handler.dispatchMessage(Handler.java:99) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > android.os.Looper.loop(Looper.java:137) 04-30 10:29:50.053: 
> > D/StrictMode(22229): at 
> > android.app.ActivityThread.main(ActivityThread.java:4424) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > java.lang.reflect.Method.invokeNative(Native Method) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > java.lang.reflect.Method.invoke(Method.java:511) 04-30 10:29:50.053: 
> > D/StrictMode(22229): at 
> > com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > dalvik.system.NativeStart.main(Native Method) 04-30 10:29:50.053: 
> 
> 
> > D/StrictMode(22229): StrictMode policy violation; ~duration=18 ms: 
> > android.os.StrictMode$StrictModeDiskWriteViolation: policy=31 
> > violation=1 04-30 10:29:50.053: D/StrictMode(22229): at 
> > android.os.StrictMode$AndroidBlockGuardPolicy.onWriteToDisk(StrictMode.java:1063) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > libcore.io.BlockGuardOs.write(BlockGuardOs.java:190) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > libcore.io.IoBridge.write(IoBridge.java:447) 04-30 10:29:50.053: 
> > D/StrictMode(22229): at 
> > java.io.FileOutputStream.write(FileOutputStream.java:187) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.MqttDefaultFilePersistence.put(MqttDefaultFilePersistence.java:165) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.internal.ClientState.send(ClientState.java:397) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.internal.ClientComms.internalSend(ClientComms.java:81) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.internal.ClientComms.sendNoWait(ClientComms.java:118) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.MqttTopic.publish(MqttTopic.java:62) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > se.chalmers.pd.dashboard.MqttWorker.publish(MqttWorker.java:177) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > se.chalmers.pd.dashboard.ApplicationController.sendResponse(ApplicationController.java:238) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > se.chalmers.pd.dashboard.ApplicationController.onLoadComplete(ApplicationController.java:358) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > se.chalmers.pd.dashboard.MainActivity$CustomWebViewClient.onPageFinished(MainActivity.java:95) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:275) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > android.os.Handler.dispatchMessage(Handler.java:99) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > android.os.Looper.loop(Looper.java:137) 04-30 10:29:50.053: 
> > D/StrictMode(22229): at 
> > android.app.ActivityThread.main(ActivityThread.java:4424) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > java.lang.reflect.Method.invokeNative(Native Method) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > java.lang.reflect.Method.invoke(Method.java:511) 04-30 10:29:50.053: 
> > D/StrictMode(22229): at 
> > com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > dalvik.system.NativeStart.main(Native Method) 04-30 10:29:50.053: 
> 
> 
> > D/StrictMode(22229): StrictMode policy violation; ~duration=2 ms: 
> > android.os.StrictMode$StrictModeDiskWriteViolation: policy=31 
> > violation=1 04-30 10:29:50.053: D/StrictMode(22229): at 
> > android.os.StrictMode$AndroidBlockGuardPolicy.onWriteToDisk(StrictMode.java:1063) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > libcore.io.BlockGuardOs.fsync(BlockGuardOs.java:96) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > java.io.FileDescriptor.sync(FileDescriptor.java:71) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.MqttDefaultFilePersistence.put(MqttDefaultFilePersistence.java:167) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.internal.ClientState.send(ClientState.java:397) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.internal.ClientComms.internalSend(ClientComms.java:81) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.internal.ClientComms.sendNoWait(ClientComms.java:118) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > org.eclipse.paho.client.mqttv3.MqttTopic.publish(MqttTopic.java:62) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > se.chalmers.pd.dashboard.MqttWorker.publish(MqttWorker.java:177) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > se.chalmers.pd.dashboard.ApplicationController.sendResponse(ApplicationController.java:238) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > se.chalmers.pd.dashboard.ApplicationController.onLoadComplete(ApplicationController.java:358) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > se.chalmers.pd.dashboard.MainActivity$CustomWebViewClient.onPageFinished(MainActivity.java:95) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:275) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > android.os.Handler.dispatchMessage(Handler.java:99) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > android.os.Looper.loop(Looper.java:137) 04-30 10:29:50.053: 
> > D/StrictMode(22229): at 
> > android.app.ActivityThread.main(ActivityThread.java:4424) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > java.lang.reflect.Method.invokeNative(Native Method) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > java.lang.reflect.Method.invoke(Method.java:511) 04-30 10:29:50.053: 
> > D/StrictMode(22229): at 
> > com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
> > 04-30 10:29:50.053: D/StrictMode(22229): at 
> > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 04-30 
> > 10:29:50.053: D/StrictMode(22229): at 
> > dalvik.system.NativeStart.main(Native Method)

编辑：这是我如何使StrictMode

StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder() 
     .detectAll() 
     .penaltyLog() 
     .build());

编辑2：以供将来参考，并添加我想我应该把东西在问题的原因这里供搜索引擎找到。

原来问题出在我们的基于Node.JS的经纪人mqttjs。它可能只是我们的实现，我没有测试过mqttjs开发者的例子。经纪人在发布了一定数量的消息后停止发布并返回令牌。 MQTT客户端在另一个线程中运行，但由于它是从UI线程调用的，因此导致了一些问题。

无论如何，我们改为蚊子，现在一切运转良好。

来源

2013-04-30 span

你读过[这个问题]（http://stackoverflow.com/questions/9780934/finding-what-violated-strictmode-policy）？ – m0skit0 2013-04-30 09:00:24

不，我没有，但似乎更严格模式？你是说我可以从中获得更多信息吗？我更新了如何启用严格模式的问题。 – span 2013-04-30 09:03:57

您的ANR发生在

org.eclipse.paho.client.mqttv3.internal.MqttDeliveryTokenImpl.waitUntilSent

，因为此方法调用Object.wait，可能等待另一个线程通知它。

您的来电显然这里

se.chalmers.pd.dashboard.MqttWorker.publish(MqttWorker.java:177)

被称为在您的实现WebClient的

se.chalmers.pd.dashboard.MainActivity$CustomWebViewClient.onPageFinished(MainActivity.java:89)

这onPageFinished方法被称为UI线程上的。通话MqttTopic.publish是一个网络通话，显然会阻塞，直到通话结束。你应该把它放在一个线程或一个AsyncTask中，这样它就不会锁定UI线程。

来源

2013-04-30 09:16:36 njzk2

那么不应该存在网络访问的严格模式警告吗？我可以毫无问题地发布许多消息，然后突然间就会挂起。 – span 2013-04-30 09:30:12

不这么认为，显然实际的网络是在另一个线程（B）中完成的，然后当前线程（A）等待，直到B通知A网络工作完成。没有网络在A上完成，它是导致ANR的object.wait – njzk2 2013-04-30 10:06:31

谢谢，你用线程A和B很好地描述了这个问题。原来问题出在MQTT代理（服务器）上，因为某些原因不明显停止发布消息。我已经将经纪人从mqttjs改为更加成熟的Mosquitto，现在一切都很好。谢谢:) – span 2013-04-30 13:05:45

您试图在UI线程上长时间运行网络通信。这阻止了UI的更新，这是不好的。 Android检测到这一事实并将其作为ANR处理。

我不知道是什么位是你的代码，但地方在这里：

se.chalmers.pd.dashboard.ApplicationController.sendResponse(ApplicationController.java:238)

你应该把MQTT工作在一个新的线程。如果由于MQTT工作完成而需要更新UI，请使用处理程序。

来源

2013-04-30 09:12:55

但是我没有得到任何关于UI警告或错误的网络？ MQTT客户端是异步的，我可以多次发布消息而不会出现问题或挂断。 – span 2013-04-30 09:34:58

严格模式只是检测我描述的工具。您可以生成未检测到的此问题的实例。原理很简单：在UI线程上花太长时间做一些事情，并且您的应用程序成为终止的候选对象。对于某些其他Android部件也是如此，例如BroadcastReceiver的onReceive（）。 [此引用]（http://developer.android.com/training/articles/perf-anr.html#anr）解释了同样的事情。 – 2013-04-30 09:39:50

由于您启用了严格模式，因此在UI线程中不允许您访问磁盘或网络。

读取您的堆栈跟踪，显然调用MqttWorker.publish会导致磁盘访问。你应该把这个调用放在一个AsyncTask或UI之外的其他线程中。

来源

2013-04-30 09:14:42

即使此磁盘访问仅在30 ms左右才是“仅” – span 2013-04-30 09:36:02

解释ANR堆栈跟踪

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