android ANR产生原因和解决办法

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ANR (Application Not Responding)  

    ANR定义:在android上,如果你的应用程序有一段时间响应不够灵敏,系统会向用户显示一个对话框,这个对话框称作应用程序无响应(ANR:Application Not Responding)对话框。用户可以选择“等待”而让程序继续运行,也可以选择“强制关闭”。所以一个流畅的合理的应用程序中不能出现anr,而让用户每次都要处理这个对话框。因此,在程序里对响应性能的设计很重要,这样系统不会显示ANR给用户。

    默认情况下,在android中Activity的最长执行时间是5秒,BroadcastReceiver的最长执行时间则是10秒。

第一:什么会引发ANR?

 

    在Android里,应用程序的响应性是由Activity Manager和WindowManager系统服务监视的 。当它监测到以下情况中的一个时,Android就会针对特定的应用程序显示ANR:

1.在5秒内没有响应输入的事件(例如,按键按下,屏幕触摸)
2.BroadcastReceiver在10秒内没有执行完毕

造成以上两点的原因有很多,比如在主线程中做了非常耗时的操作,比如说是下载,io异常等。

   

    潜在的耗时操作,例如网络或数据库操作,或者高耗时的计算如改变位图尺寸,应该在子线程里(或者以数据库操作为例,通过异步请求的方式)来完成。然而,不是说你的主线程阻塞在那里等待子线程的完成——也不是调用 Thread.wait()或是Thread.sleep()。替代的方法是,主线程应该为子线程提供一个Handler,以便完成时能够提交给主线程。以这种方式设计你的应用程序,将能保证你的主线程保持对输入的响应性并能避免由于5秒输入事件的超时引发的ANR对话框。

 

第二:如何避免ANR?

 

1、运行在主线程里的任何方法都尽可能少做事情。特别是,Activity应该在它的关键生命周期方法(如onCreate()和onResume())里尽可能少的去做创建操作。(可以采用重新开启子线程的方式,然后使用Handler+Message的方式做一些操作,比如更新主线程中的ui等)

 

2、应用程序应该避免在BroadcastReceiver里做耗时的操作或计算。但不再是在子线程里做这些任务(因为 BroadcastReceiver的生命周期短),替代的是,如果响应Intent广播需要执行一个耗时的动作的话,应用程序应该启动一个 Service。(此处需要注意的是可以在广播接受者中启动Service,但是却不可以在Service中启动broadcasereciver,关于原因后续会有介绍,此处不是本文重点)

 

3、避免在Intent Receiver里启动一个Activity,因为它会创建一个新的画面,并从当前用户正在运行的程序上抢夺焦点。如果你的应用程序在响应Intent广 播时需要向用户展示什么,你应该使用Notification Manager来实现。

 

总结:anr异常也是在程序中自己经常遇到的问题,主要的解决办法自己最常用的就是不要在主线程中做耗时的操作,而应放在子线程中来实现,比如采用Handler+mesage的方式,或者是有时候需要做一些和网络相互交互的耗时操作就采用asyntask异步任务的方式(它的底层其实Handler+mesage有所区别的是它是线程池)等,在主线程中更新UI。

 

 

 

Android ANR这个错误大家并不陌生,但是从Android2.2开始出错的ANR信息会自动上传给Google进行系统分析改进,当然了你的应用ANR错误其实保存在一个文件中,在/data/anr/traces.txt文件中.
下面一起来分析下错误吧,第一行为出错的时间,第二行都会写上发生ANR的packageName,下文是com.android.systemui这个包,里面的部分线程出了问题,通过下面的的xxx方法以及对应的java文件,后面的数字为xxx.java文件的第几行,是不是很方便呢?

----- pid 125 at 2011-02-22 05:18:01 -----
Cmd line: com.Android.systemui

 

DALVIK THREADS:
(mutexes: tll=0 tsl=0 tscl=0 ghl=0 hwl=0 hwll=0)
"main" prio=5 tid=1 NATIVE
  | group="main" sCount=1 dsCount=0 obj=0x4001f1a8self=0xce48
  | sysTid=125 nice=0 sched=0/0 cgrp=defaulthandle=-1345006528
  | schedstat=( 981213067 8042604425 151 )
  at android.os.BinderProxy.transact(NativeMethod)
  atandroid.os.storage.IMountService$Stub$Proxy.isUsbMassStorageConnected(IMountService.Java:95)
  atandroid.os.storage.StorageManager.isUsbMassStorageConnected(StorageManager.java:385)
  atcom.android.systemui.usb.StorageNotification.<init>(StorageNotification.java:71)
  atcom.android.systemui.statusbar.policy.StatusBarPolicy.<init>(StatusBarPolicy.java:412)
  atcom.android.systemui.statusbar.StatusBarService.onCreate(StatusBarService.java:239)
  atandroid.app.ActivityThread.handleCreateService(ActivityThread.java:1920)
  atandroid.app.ActivityThread.access$2500(ActivityThread.java:117)
  atandroid.app.ActivityThread$H.handleMessage(ActivityThread.java:982)
  atandroid.os.Handler.dispatchMessage(Handler.java:99)
  at android.os.Looper.loop(Looper.java:123)
  atandroid.app.ActivityThread.main(ActivityThread.java:3647)
  at java.lang.reflect.Method.invokeNative(NativeMethod)
  atjava.lang.reflect.Method.invoke(Method.java:507)
  atcom.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
  atcom.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
  at dalvik.system.NativeStart.main(NativeMethod)

"Binder Thread #2" prio=5 tid=8 NATIVE
  | group="main" sCount=1 dsCount=0 obj=0x40511270self=0x1c1100
  | sysTid=153 nice=0 sched=0/0 cgrp=defaulthandle=1141608
  | schedstat=( 27181321 64708345 5 )
  at dalvik.system.NativeStart.run(NativeMethod)

"Binder Thread #1" prio=5 tid=7 NATIVE
  | group="main" sCount=1 dsCount=0 obj=0x405111a8self=0x1349c8
  | sysTid=152 nice=0 sched=0/0 cgrp=defaulthandle=1264008
  | schedstat=( 31857510 74284459 5 )
  at dalvik.system.NativeStart.run(NativeMethod)

"Compiler" daemon prio=5 tid=6 VMWAIT
  | group="system" sCount=1 dsCount=0obj=0x4050dd10 self=0x116538
  | sysTid=144 nice=0 sched=0/0 cgrp=defaulthandle=982520
  | schedstat=( 7319346 103454345 12 )
  at dalvik.system.NativeStart.run(NativeMethod)

"JDWP" daemon prio=5 tid=5 VMWAIT
  | group="system" sCount=1 dsCount=0obj=0x4050dc60 self=0x116400
  | sysTid=142 nice=0 sched=0/0 cgrp=defaulthandle=986536
  | schedstat=( 32876840 393298925 20 )
  at dalvik.system.NativeStart.run(NativeMethod)

"Signal Catcher" daemon prio=5 tid=4 RUNNABLE
  | group="system" sCount=0 dsCount=0obj=0x4050dba0 self=0x253ab0
  | sysTid=141 nice=0 sched=0/0 cgrp=defaulthandle=2439792
  | schedstat=( 94447996 796994478 19 )
  at dalvik.system.NativeStart.run(NativeMethod)

"GC" daemon prio=5 tid=3 VMWAIT
  | group="system" sCount=1 dsCount=0obj=0x4050daf8 self=0x8fd40
  | sysTid=128 nice=0 sched=0/0 cgrp=defaulthandle=2439592
  | schedstat=( 103352102 819201761 21 )
  at dalvik.system.NativeStart.run(NativeMethod)

"HeapWorker" daemon prio=5 tid=2 VMWAIT
  | group="system" sCount=1 dsCount=0obj=0x4050da40 self=0xf0c70
  | sysTid=127 nice=0 sched=0/0 cgrp=defaulthandle=2439528
  | schedstat=( 971134410 6445300652 103 )
  at dalvik.system.NativeStart.run(NativeMethod)

 

 

二:ANR的常见类型

ANR一般有三种类型:

1KeyDispatchTimeout(5 seconds) --主要类型

按键或触摸事件在特定时间内无响应

2BroadcastTimeout(10 seconds)

BroadcastReceiver在特定时间内无法处理完成

3ServiceTimeout(20 seconds) --小概率类型

Service在特定的时间内无法处理完成

三:KeyDispatchTimeout

Akey or touch event was not dispatched within the specified time(按键或触摸事件在特定时间内无响应)

具体的超时时间的定义在framework下的

ActivityManagerService.java

//How long we wait until we timeout on key dispatching.

staticfinal int KEY_DISPATCHING_TIMEOUT = 5*1000

四:为什么会超时呢?

超时时间的计数一般是从按键分发给app开始。超时的原因一般有两种

(1)当前的事件没有机会得到处理(即UI线程正在处理前一个事件,没有及时的完成或者looper被某种原因阻塞住了)

(2)当前的事件正在处理,但没有及时完成

五:如何避免KeyDispatchTimeout

1UI线程尽量只做跟UI相关的工作

2:耗时的工作(比如数据库操作,I/O,连接网络或者别的有可能阻碍UI线程的操作)把它放入单独的线程处理

3:尽量用Handler来处理UIthread和别的thread之间的交互

 

六:UI线程

说了那么多的UI线程,那么哪些属于UI线程呢?

UI线程主要包括如下:

  1. Activity:onCreate(), onResume(), onDestroy(), onKeyDown(), onClick(),etc

  2. AsyncTask: onPreExecute(), onProgressUpdate(), onPostExecute(), onCancel,etc

  3. Mainthread handler: handleMessage(), post*(runnable r), etc

  4. other

:如何去分析ANR

先看个LOG:

04-01 13:12:11.572 I/InputDispatcher( 220): Application is not responding:Window{2b263310com.android.email/com.android.email.activity.SplitScreenActivitypaused=false}.  5009.8ms since event, 5009.5ms since waitstarted

04-0113:12:11.572 I/WindowManager( 220): Input event dispatching timedout sending tocom.android.email/com.android.email.activity.SplitScreenActivity

04-01 13:12:14.123 I/Process(  220): Sending signal. PID: 21404 SIG: 3---发生ANR的时间和生成trace.txt的时间

04-01 13:12:14.123 I/dalvikvm(21404):threadid=4: reacting to signal 3 

……

04-0113:12:15.872 E/ActivityManager(  220): ANR in com.android.email(com.android.email/.activity.SplitScreenActivity)

04-0113:12:15.872 E/ActivityManager(  220): Reason:keyDispatchingTimedOut

04-0113:12:15.872 E/ActivityManager(  220): Load: 8.68 / 8.37 / 8.53

04-0113:12:15.872 E/ActivityManager(  220):CPUusage from 4361ms to 699ms ago----CPUANR发生前的使用情况

 

04-0113:12:15.872 E/ActivityManager(  220):   5.5%21404/com.android.email: 1.3% user + 4.1% kernel / faults: 10 minor

04-0113:12:15.872 E/ActivityManager(  220):   4.3%220/system_server: 2.7% user + 1.5% kernel / faults: 11 minor 2 major

04-0113:12:15.872 E/ActivityManager(  220):   0.9%52/spi_qsd.0: 0% user + 0.9% kernel

04-0113:12:15.872 E/ActivityManager(  220):   0.5%65/irq/170-cyttsp-: 0% user + 0.5% kernel

04-0113:12:15.872 E/ActivityManager(  220):   0.5%296/com.android.systemui: 0.5% user + 0% kernel

04-0113:12:15.872 E/ActivityManager(  220): 100%TOTAL: 4.8% user + 7.6% kernel + 87% iowait

04-0113:12:15.872 E/ActivityManager(  220):CPUusage from 3697ms to 4223ms later:-- ANRCPU的使用量

04-0113:12:15.872 E/ActivityManager(  220):   25%21404/com.android.email: 25% user + 0% kernel / faults: 191 minor

04-0113:12:15.872 E/ActivityManager(  220):    16% 21603/__eas(par.hakan: 16% user + 0% kernel

04-0113:12:15.872 E/ActivityManager(  220):    7.2% 21406/GC: 7.2% user + 0% kernel

04-0113:12:15.872 E/ActivityManager(  220):    1.8% 21409/Compiler: 1.8% user + 0% kernel

04-0113:12:15.872 E/ActivityManager(  220):   5.5%220/system_server: 0% user + 5.5% kernel / faults: 1 minor

04-0113:12:15.872 E/ActivityManager(  220):    5.5% 263/InputDispatcher: 0% user + 5.5% kernel

04-0113:12:15.872 E/ActivityManager(  220): 32%TOTAL: 28% user + 3.7% kernel

 

LOG可以看出ANR的类型,CPU的使用情况,如果CPU使用量接近100%,说明当前设备很忙,有可能是CPU饥饿导致了ANR

如果CPU使用量很少,说明主线程被BLOCK

如果IOwait很高,说明ANR有可能是主线程在进行I/O操作造成的

除了看LOG,解决ANR还得需要trace.txt文件,

如何获取呢?可以用如下命令获取

  1. $chmod 777 /data/anr

  2. $rm /data/anr/traces.txt

  3. $ps

  4. $kill -3PID

  5. adbpull data/anr/traces.txt ./mytraces.txt

trace.txt文件,看到最多的是如下的信息:

-----pid 21404 at 2011-04-0113:12:14 -----  
Cmdline: com.android.email

DALVIK THREADS:
(mutexes: tll=0tsl=0 tscl=0 ghl=0 hwl=0 hwll=0)
"main" prio=5 tid=1NATIVE
  | group="main" sCount=1 dsCount=0obj=0x2aad2248 self=0xcf70
  | sysTid=21404 nice=0 sched=0/0cgrp=[fopen-error:2] handle=1876218976
  atandroid.os.MessageQueue.nativePollOnce(Native Method)
  atandroid.os.MessageQueue.next(MessageQueue.java:119)
  atandroid.os.Looper.loop(Looper.java:110
)
 at android.app.ActivityThread.main(ActivityThread.java:3688)
 at java.lang.reflect.Method.invokeNative(Native Method)
  atjava.lang.reflect.Method.invoke(Method.java:507)
  atcom.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:624)
 at dalvik.system.NativeStart.main(Native Method)

说明主线程在等待下条消息进入消息队列

八:Thread状态

ThreadState (defined at “dalvik/vm/thread.h “)

THREAD_UNDEFINED = -1, /* makes enum compatible with int32_t */

THREAD_ZOMBIE = 0, /* TERMINATED */

THREAD_RUNNING = 1, /* RUNNABLE or running now */

THREAD_TIMED_WAIT = 2, /* TIMED_WAITING in Object.wait() */

THREAD_MONITOR = 3, /* BLOCKED on a monitor */

THREAD_WAIT = 4, /* WAITING in Object.wait() */

THREAD_INITIALIZING= 5, /* allocated, not yet running */

THREAD_STARTING = 6, /* started, not yet on thread list */

THREAD_NATIVE = 7, /* off in a JNI native method */

THREAD_VMWAIT = 8, /* waiting on a VM resource */

THREAD_SUSPENDED = 9, /* suspended, usually by GC or debugger */

 

九:如何调查并解决ANR

1:首先分析log

2: trace.txt文件查看调用stack.

3: 看代码

4:仔细查看ANR的成因(iowait?block?memoryleak?

 

十:案例

案例1关键词:ContentResolver in AsyncTask onPostExecute, high iowait

Process:com.android.email
Activity:com.android.email/.activity.MessageView
Subject:keyDispatchingTimedOut
CPU usage from 2550ms to -2814ms ago:
5%187/system_server: 3.5% user + 1.4% kernel / faults: 86 minor 20major
4.4% 1134/com.android.email: 0.7% user + 3.7% kernel /faults: 38 minor 19 major
4% 372/com.android.eventstream: 0.7%user + 3.3% kernel / faults: 6 minor
1.1% 272/com.android.phone:0.9% user + 0.1% kernel / faults: 33 minor
0.9%252/com.android.systemui: 0.9% user + 0% kernel
0%409/com.android.eventstream.telephonyplugin: 0% user + 0% kernel /faults: 2 minor
0.1% 632/com.android.devicemonitor: 0.1% user + 0%kernel
100%TOTAL: 6.9% user + 8.2% kernel +84%iowait


-----pid 1134 at 2010-12-17 17:46:51 -----
Cmd line:com.android.email

DALVIK THREADS:
(mutexes: tll=0 tsl=0tscl=0 ghl=0 hwl=0 hwll=0)
"main" prio=5 tid=1 WAIT
|group="main" sCount=1 dsCount=0 obj=0x2aaca180self=0xcf20
| sysTid=1134 nice=0 sched=0/0 cgrp=[fopen-error:2]handle=1876218976
at java.lang.Object.wait(Native Method)
-waiting on <0x2aaca218> (a java.lang.VMThread)
atjava.lang.Thread.parkFor(Thread.java:1424)
atjava.lang.LangAccessImpl.parkFor(LangAccessImpl.java:48)
atsun.misc.Unsafe.park(Unsafe.java:337)
atjava.util.concurrent.locks.LockSupport.park(LockSupport.java:157)
atjava.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:808)
atjava.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:841)
atjava.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1171)
atjava.util.concurrent.locks.ReentrantLock$FairSync.lock(ReentrantLock.java:200)
atjava.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:261)
atandroid.database.sqlite.SQLiteDatabase.lock(SQLiteDatabase.java:378)
atandroid.database.sqlite.SQLiteCursor.<init>(SQLiteCursor.java:222)
atandroid.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:53)
atandroid.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1356)
atandroid.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1235)
atandroid.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1189)
atandroid.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1271)
atcom.android.email.provider.EmailProvider.query(EmailProvider.java:1098)
atandroid.content.ContentProvider$Transport.query(ContentProvider.java:187)
atandroid.content.
ContentResolver.query(ContentResolver.java:268)
atcom.android.email.provider.EmailContent$Message.restoreMessageWithId(EmailContent.java:648)
atcom.android.email.Controller.setMessageRead(Controller.java:658)
atcom.android.email.activity.MessageView.onMarkAsRead(MessageView.java:700)
atcom.android.email.activity.MessageView.access$2500(MessageView.java:98)
at
com.android.email.activity.MessageView$LoadBodyTask.onPostExecute(MessageView.java:1290)
atcom.android.email.activity.MessageView$LoadBodyTask.onPostExecute(MessageView.java:1255)
atandroid.os.AsyncTask.finish(AsyncTask.java:417)
atandroid.os.AsyncTask.access$300(AsyncTask.java:127)
at
android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:429)
atandroid.os.Handler.dispatchMessage(Handler.java:99)
atandroid.os.Looper.loop(Looper.java:123)
atandroid.app.ActivityThread.main(ActivityThread.java:3652)
atjava.lang.reflect.Method.invokeNative(Native Method)
atjava.lang.reflect.Method.invoke(Method.java:507)
atcom.android.internal.os.ZygoteIn

原因:IOWait很高,说明当前系统在忙于I/O,因此数据库操作被阻塞

原来:

finalMessagemessage=Message.restoreMessageWithId(mProviderContext,messageId);
if(message==null){
   return;
}

Accountaccount=Account.restoreAccountWithId(mProviderContext,message.mAccountKey);

if(account==null){
   return;//isMessagingController returns false for null, but let‘s make itclear.
}

if(isMessagingController(account)){
   new Thread(){
       @Override
       public void run(){
          mLegacyController.processPendingActions(message.mAccountKey);
       }
   }.start();
}

解决后:

 

newThread() {
    finalMessagemessage=Message.restoreMessageWithId(mProviderContext,messageId);

    if(message==null){
        return;
    }

    Accountaccount=Account.restoreAccountWithId(mProviderContext,message.mAccountKey);

    if(account==null){
       return;//isMessagingController returns false for null, but let‘s make itclear.
    }

    if(isMessagingController(account)) {
        mLegacyController.processPendingActions(message.mAccountKey);
    }
}.start();

 

关于AsyncTask:http://developer.android.com/reference/android/os/AsyncTask.html

 

案例2关键词:UI线程进行网络数据的读写

ANRin process: com.android.mediascape:PhotoViewer (last incom.android.mediascape:PhotoViewer)
Annotation:keyDispatchingTimedOut
CPU usage:
Load: 6.74 / 6.89 / 6.12
CPUusage from 8254ms to 3224ms ago:
ovider.webmedia: 4% = 4% user +0% kernel / faults: 68 minor
system_server: 2% = 1% user + 0%kernel / faults: 18 minor
re-initialized>: 0% = 0% user + 0%kernel / faults: 50 minor
events/0: 0% = 0% user + 0%kernel
TOTAL:7% = 6% user + 1% kernel

DALVIKTHREADS:
""main"" prio=5 tid=3 NATIVE
|group=""main"" sCount=1 dsCount=0 s=Yobj=0x4001b240 self=0xbda8
| sysTid=2579 nice=0 sched=0/0cgrp=unknown handle=-1343993184
atorg.apache.harmony.luni.platform.OSNetworkSystem.receiveStreamImpl(NativeMethod)
atorg.apache.harmony.luni.platform.
OSNetworkSystem.receiveStream(OSNetworkSystem.java:478)
atorg.apache.harmony.luni.NET.PlainSocketImpl.read(PlainSocketImpl.java:565)
atorg.apache.harmony.luni.Net.SocketInputStream.read(SocketInputStream.java:87)
atorg.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnection$LimitedInputStream.read(HttpURLConnection.java:303)
atjava.io.InputStream.read(InputStream.java:133)
atjava.io.BufferedInputStream.fillbuf(BufferedInputStream.java:157)
atjava.io.BufferedInputStream.read(BufferedInputStream.java:346)
atandroid.graphics.BitmapFactory.nativeDecodeStream(Native Method)
atandroid.graphics.
BitmapFactory.decodeStream(BitmapFactory.java:459)
atcom.android.mediascape.activity.PhotoViewerActivity.
getPreviewImage(PhotoViewerActivity.java:4465)
atcom.android.mediascape.activity.PhotoViewerActivity.
dispPreview(PhotoViewerActivity.java:4406)
atcom.android.mediascape.activity.PhotoViewerActivity.access$6500(PhotoViewerActivity.java:125)

atcom.android.mediascape.activity.PhotoViewerActivity$33$1.run(PhotoViewerActivity.java:4558)
atandroid.os.Handler.handleCallback(Handler.java:587)
atandroid.os.Handler.dispatchMessage(Handler.java:92)
atandroid.os.Looper.loop(Looper.java:123)
atandroid.app.ActivityThread.main(ActivityThread.java:4370)
atjava.lang.reflect.Method.invokeNative(Native Method)
atjava.lang.reflect.Method.invoke(Method.java:521)
atcom.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
atcom.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
atdalvik.system.NativeStart.main(Native Method)

关于网络连接,在设计的时候可以设置个timeout的时间或者放入独立的线程来处理。

关于Handler的问题,可以参考:http://developer.android.com/reference/android/os/Handler.html

案例3

关键词:Memoryleak/Thread leak

11-1621:41:42.560 I/ActivityManager( 1190): ANR in process:android.process.acore (last in android.process.acore)
11-1621:41:42.560 I/ActivityManager( 1190): Annotation:keyDispatchingTimedOut
11-16 21:41:42.560 I/ActivityManager(1190): CPU usage:
11-16 21:41:42.560 I/ActivityManager( 1190):Load: 11.5 / 11.1 / 11.09
11-16 21:41:42.560 I/ActivityManager(1190): CPU usage from 9046ms to 4018ms ago:
11-16 21:41:42.560I/ActivityManager( 1190): 
d.process.acore:98%= 97% user + 0% kernel / faults: 1134 minor
11-16 21:41:42.560I/ActivityManager( 1190): system_server: 0% = 0% user + 0% kernel /faults: 1 minor
11-16 21:41:42.560 I/ActivityManager( 1190): adbd:0% = 0% user + 0% kernel
11-16 21:41:42.560 I/ActivityManager(1190): logcat: 0% = 0% user + 0% kernel
11-16 21:41:42.560I/ActivityManager( 1190): 
TOTAL:100% = 98% user + 1% kernel

Cmdline: android.process.acore

DALVIK THREADS:
"main"prio=5 tid=3 
VMWAIT
|group="main" sCount=1 dsCount=0 s=N obj=0x40026240self=0xbda8
| sysTid=1815 nice=0 sched=0/0 cgrp=unknownhandle=-1344001376
atdalvik.system.
VMRuntime.trackExternalAllocation(NativeMethod)
atandroid.graphics.Bitmap.nativeCreate(Native Method)
atandroid.graphics.
Bitmap.createBitmap(Bitmap.java:468)
atandroid.view.View.buildDrawingCache(View.java:6324)
atandroid.view.View.getDrawingCache(View.java:6178)
atandroid.view.ViewGroup.drawChild(ViewGroup.java:1541)
……
atcom.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1830)
atandroid.view.ViewRoot.draw(ViewRoot.java:1349)
atandroid.view.ViewRoot.performTraversals(ViewRoot.java:1114)
atandroid.view.ViewRoot.handleMessage(ViewRoot.java:1633)
atandroid.os.Handler.dispatchMessage(Handler.java:99)
atandroid.os.Looper.loop(Looper.java:123)
atandroid.app.ActivityThread.main(ActivityThread.java:4370)
atjava.lang.reflect.Method.invokeNative(Native Method)
atjava.lang.reflect.Method.invoke(Method.java:521)
atcom.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
atcom.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
atdalvik.system.NativeStart.main(Native Method)

"Thread-408"prio=5 tid=329 WAIT
|group="main" sCount=1 dsCount=0 s=N obj=0x46910d40self=0xcd0548
| sysTid=10602 nice=0 sched=0/0 cgrp=unknownhandle=15470792
at java.lang.Object.wait(Native Method)
-waiting on <0x468cd420> (a java.lang.Object)
atjava.lang.Object.wait(Object.java:288)
atcom.android.dialer.CallLogContentHelper$UiUpdaterExecutor$1.run(CallLogContentHelper.java:289)
atjava.lang.Thread.run(Thread.java:1096)

分析:

atdalvik.system.VMRuntime.trackExternalAllocation(NativeMethod)内存不足导致block在创建bitmap

**MEMINFO in pid 1360 [android.process.acore] **
native dalvik other total
size: 17036 
23111 N/A 40147
allocated: 16484 20675 N/A 37159
free: 296 2436 N/A 2732

解决:如果机器的内存族,可以修改虚拟机的内存为36M或更大,不过最好是复查代码,查看哪些内存没有释

 



















































































































































































































































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