8827人阅读
android 学习（18）
七:如何去分析ANR
先看个LOG:
<span style="color:#ff&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-.572 I/WindowManager( 220): Input event dispatching timedout sending tocom.android.email/com.android.email.activity.SplitScreenActivity
<span style="color:#ff&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-.872 E/ActivityManager(& 220): ANR in com.android.email(com.android.email/.activity.SplitScreenActivity)
04-.872 E/ActivityManager(& 220): Reason:keyDispatchingTimedOut
04-.872 E/ActivityManager(& 220): Load: 8.68 / 8.37 / 8.53
<span style="color:#ff3:12:15.872 E/ActivityManager(& 220):
CPUusage from&4361ms to 699ms ago
----CPU在ANR发生前的使用情况
04-.872 E/ActivityManager(& 220):&& 5.5%21404/com.android.email: 1.3% user &#43; 4.1% kernel / faults: 10 minor
04-.872 E/ActivityManager(& 220):&& 4.3%220/system_server: 2.7% user &#43; 1.5% kernel / faults: 11 minor 2 major
04-.872 E/ActivityManager(& 220):&& 0.9%52/spi_qsd.0: 0% user &#43; 0.9% kernel
04-.872 E/ActivityManager(& 220):&& 0.5%65/irq/170-cyttsp-: 0% user &#43; 0.5% kernel
04-.872 E/ActivityManager(& 220):&& 0.5%296/com.android.systemui: 0.5% user &#43; 0% kernel
<span style="color:#ff3:12:15.872 E/ActivityManager(& 220):&100%TOTAL: 4.8% user &#43; 7.6% kernel &#43; 87% iowait
<span style="color:#ff3:12:15.872 E/ActivityManager(& 220):
CPUusage from&3697ms to 4223ms&later:-- ANR后CPU的使用量
04-.872 E/ActivityManager(& 220):&& 25%21404/com.android.email: 25% user &#43; 0% kernel / faults: 191 minor
04-.872 E/ActivityManager(& 220):&&&&16% 21603/__eas(par.hakan: 16% user &#43; 0% kernel
04-.872 E/ActivityManager(& 220):&&&&7.2% 21406/GC: 7.2% user &#43; 0% kernel
04-.872 E/ActivityManager(& 220):&&&&1.8% 21409/Compiler: 1.8% user &#43; 0% kernel
04-.872 E/ActivityManager(& 220):&& 5.5%220/system_server: 0% user &#43; 5.5% kernel / faults: 1 minor
04-.872 E/ActivityManager(& 220):&&&&5.5% 263/InputDispatcher: 0% user &#43; 5.5% kernel
<span style="color:#ff3:12:15.872 E/ActivityManager(& 220):&32%TOTAL: 28% user &#43; 3.7% kernel
从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了
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
$chmod 777 /data/anr
$rm /data/anr/traces.txt
adbpull data/anr/traces.txt ./mytraces.txt
从trace.txt文件，看到最多的是如下的信息：
-----pid 21404 at&
13:12:14&----- &
Cmdline: com.android.email
DALVIK THREADS:
(mutexes: tll=0tsl=0 tscl=0 ghl=0 hwl=0 hwll=0)
&main& prio=5 tid=1NATIVE
& | group=&main& sCount=1 dsCount=0obj=0x2aad2248 self=0xcf70
& | sysTid=21404 nice=0 sched=0/0cgrp=[fopen-error:2] handle=
& atandroid.os.MessageQueue.nativePollOnce(Native Method)
& atandroid.os.MessageQueue.next(MessageQueue.java:119)
& atandroid.os.Looper.loop(Looper.java:110)
&at android.app.ActivityThread.main(ActivityThread.java:3688)
&at java.lang.reflect.Method.invokeNative(Native Method)
& atjava.lang.reflect.Method.invoke(Method.java:507)
& atcom.android.internal.os.ZygoteInit$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
从trace.txt文件查看调用stack.
4：仔细查看ANR的成因（iowait?block?memoryleak?）
* 以上用户言论只代表其个人观点，不代表CSDN网站的观点或立场
访问：271820次
积分：3101
积分：3101
排名：第6478名
原创：31篇
评论：160条
(1)(2)(1)(3)(4)(5)(1)(10)(8)(4)求解分析_百度知道
//b://b.baidu.jpg" target="_blank" title="点击查看大图" class="ikqb_img_alink"><img class="ikqb_img" src="/zhidao/wh%3D450%2C600/sign=d8cf18f71bb2c034af682/9e3df8dcd100baa1bca922afc2e26.hiphotos://b.hiphotos.baidu./zhidao/pic/item/9e3df8dcd100baa1bca922afc2e26.jpg" esrc="/zhidao/wh%3D600%2C800/sign=fb3ae92bef23/9e3df8dcd100baa1bca922afc2e26;<a href="http&nbsp
提问者采纳
能帮我分析吗
爱疯六是物品，不能用who这是第一点。然后两个句子中间不能用逗号连接，所以it不选。剩下that和which，定语从句中that不能用逗号，所以用which。选C
提问者评价
太给力了，你的回答完美地解决了我的问题，非常感谢！
其他类似问题
为您推荐：
其他2条回答
C，这里定从修饰物，只能选that和which，但有逗号是不能选that只能选which
C which 引导的定语从句，修饰前面的iPhone 6
等待您来回答
下载知道APP
随时随地咨询
出门在外也不愁求解分析 _百度作业帮
扫描下载二维码