Android开发中碰到的一个ANR问题。

这是一个点击之后反应超时的ANR

[// ::] - ::57.343      D ActivityManager: Delay resumeKeyDispatchingLocked() to avoid deadlock.
[// ::] - ::57.343       E ANRManager: ANR in com.android.settings (com.android.settings/.LanguageSettings), time=
[// ::] ng up.)   // Reason漏了
[// ::] - ::57.343       E ANRManager: Load: 21.75 / 22.85 / 18.3
[// ::] - ::57.343       E ANRManager: Android time :[-- ::57.27] [1490.278]
[// ::] - ::57.343       E ANRManager: CPU usage from 13170ms to 0ms ago:
[// ::] - ::57.343       E ANRManager:   % /com.**********.services: % user + % kernel / faults:  minor  major
[// ::] - ::57.343       E ANRManager:   % /system_server: % user + % kernel / faults:  minor  major
[// ::] - ::57.343       E ANRManager:   % /android.process.media: % user + 1.8% kernel / faults:  minor  major
[// ::] - ::57.343       E ANRManager:   % /surfaceflinger: 6.8% user + 6.1% kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   % /com.android.settings: 9.3% user + 2.4% kernel / faults:  minor  major
[// ::] - ::57.343       E ANRManager:   8.9% /com.**********.voiceassistant: 7.4% user + 1.5% kernel / faults:  minor  major
[// ::] - ::57.343       E ANRManager:   % /ksdioirqd/mmc1: % user + % kernel
[// ::] - ::57.343       E ANRManager:   3.4% /logd: 1.8% user + 1.5% kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   2.7% /kswapd0: % user + 2.7% kernel
[// ::] - ::57.343       E ANRManager:   2.1% /com.*********.settings<> ()[:RadioServiceThr]i2c ioctl, cmd=0x707, arg=0xa2e1d490
[// ::] : 1.4% user + 0.7% kernel / faults:  minor  major
[// ::] - ::57.343       E ANRManager:   1.9% /mmcqd/: % user + 1.9% kernel
[// ::] - ::57.343       E ANRManager:   1.6% /com.android.phone: 0.9% user + 0.6% kernel / faults:  minor  major
[// ::] - ::57.343       E ANRManager:   1.5% /com.android.systemui: 1.2% user + 0.3% kernel / faults:  minor  major
[// ::] - ::57.343       E ANRManager:   1.4% /com.*********.carplay: 0.8% user + 0.6% kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   1.2% /outhw_thread: % user + 1.2% kernel
[// ::] - ::57.343       E ANRManager:   1.2% /com.**********.radio_v2: 0.9% user + 0.3% kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   % /mediaserver: 0.6% user + 0.3% kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   0.9% /mnld: 0.8% user + % kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   0.5% /stp_sdio_tx_rx: % user + 0.5% kernel
[// ::] - ::57.343       E ANRManager:   0.4% /rcu_preempt: % user + 0.4% kernel
[// ::] - ::57.343       E ANRManager:   0.3% /pb_stream_threa: % user + 0.3% kernel
[// ::] - ::57.343       E ANRManager:   0.3% /zygote: % user + 0.2% kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   0.3% /servicemanager: % user + 0.2% kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   0.2% /com.**********.avm.t3plus: 0.1% user + % kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   0.2% /kworker/:: % user + 0.2% kernel
[// ::] - ::57.343       E ANRManager:   0.2% /kworker/u8:: % user + 0.2% kernel
[// ::] - ::57.343       E ANRManager:   0.2% /wpa_supplicant: 0.1% user + % kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   0.2% /kworker/u8:: % user + 0.2% kernel
[// ::] - ::57.343       E ANRManager:   0.1% /Audin1AU: % user + 0.1% kernel
[// ::] - ::57.343       E ANRManager:   0.1% /HDMIRxTask Thre: % user + 0.1% kernel
[// ::] - ::57.343       E ANRManager:   % /com.gislocation.android.service: % user + % kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   0.1% /app_process: % user + % kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   0.1% /com.**********.carassistant: % user + % kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   0.1% /com.************.btservice: % user + % kernel / faults:  minor  major
[// ::] - ::57.343       E ANRManager:   0.1% /kworker/u8:: % user + 0.1% kernel
[// ::] - ::57.343       E ANRManager:   0.1% /hif_thread: % user + 0.1% kernel
[// ::] - ::57.343       E ANRManager:   0.1% /com.**********.music: % user + % kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   0.1% /kworker/:: % user + 0.1% kernel
[// ::] - ::57.343       E ANRManager:   0.1% /kworker/:: % user + 0.1% kernel
[// ::] - ::57.343       E ANRManager:   0.1% /kworker/:: % user + 0.1% kernel
[// ::] - ::57.343       E ANRManager:   % //init: 0% user + 0% kernel
[// ::] - ::57.343       E ANRManager:   % /migration/: % user + % kernel
[// ::] - ::57.343       E ANRManager:   % /jbd2/mmcblk0p27: % user + % kernel
[// ::] - ::57.343       E ANRManager:   % /AudEsm: % user + % kernel
[// ::] - ::57.343       E ANRManager:   % /Audin2AU: % user + % kernel
[// ::] - ::57.343       E ANRManager   % /HDMIRxCbusLink : % user + % kernel
[// ::] - ::57.343       E ANRManager:   % /HDMIRxCbusCmd T: % user + % kerne<> ()[:RadioServiceThr]i2c ioctl, cmd=0x707, arg=0xa2e1d470
[// ::] l
[// ::] - ::57.343       E ANRManager:   % /mtk_stp_psm: % user + % kernel
[// ::] - ::57.343       E ANRManager:   % /com.android.inputmethod.latin: % user + % kernel / faults:  minor  major
[// ::] - ::57.343       E ANRManager:   % /com.*********.carcameras: % user + % kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   % /com.********.bluetooth: % user + % kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   % /com.android.defcontainer: % user + % kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   % /com.**********.quickbootmanager: % user + % kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   % /com.**********.gallery: % user + % kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   % /tx_thread: % user + % kernel
[// ::] - ::57.343       E ANRManager:   % /com.********.filemanager: % user + % kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   % /com.android.externalstorage: % user + % kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:   % /android.process.media: % user + % kernel / faults:  minor
[// ::] - ::57.343       E ANRManager:  +% /android.process.acore: % user + % kernel
[// ::] - ::57.343       E ANRManager: % T     // Total漏了

初步判断是系统和服务占用资源太多，引起原生设置的ANR
在原生设置“语言和输入法”界面点击返回键是在10:24:52.563，原生设置是在10:24:52.723结束，公司设置是在10:24:57.238才收到onConfigurationChanged回调，快5秒了

                                     - ::52.563        4057             ue to no window focus: KeyEvent { action=ACTION_UP, keyCode=KEYCODE_BACK, scanCode=, metaState=, flags=0x68, repeatCount=, eventTime=, downTime=, deviceId=-, source=0x101 }
                                     - ::52.723     D ActivityThread: ACT-DESTROY_ACTIVITY handled :  / android.os.BinderProxy@5af997d
    Line : [// ::] - ::57.238     D RRIVI   : HomeActivity--TAGonConfigurationChanged  onConfigurationChanged com.roadrover.settings.ui.activity.HomeActivity@7c8a4d8
                [// ::] - ::57.332     V ActivityThread: Performing resume of ActivityRecord{8570c4a token=android.os.BinderProxy@e0af7bb {com.roadrover.settings/com.roadrover.settings.ui.activity.HomeActivity}}
    Line : [// ::] - ::57.343       E ANRManager: ANR in com.android.settings (com.android.settings/.LanguageSettings), time=
    Line : [// ::] - ::57.671     D RRIVI   : HomeActivity--TAGonCreate  onCreate com.roadrover.settings.ui.activity.HomeActivity@428a691
    Line : [// ::] - ::58.309     D RRIVI   : HomeActivity--TAGonResume  onResume com.roadrover.settings.ui.activity.HomeActivity@428a691

PS：ACT-DESTROY_ACTIVITY这个操作是在当前activity的onDestroy走了之后才会走得。

[一个ANR问题]

Application is not responding: AppWindowToken{2c381cd0 token=Token{2c38feb8 ActivityRecord{2c2ddce0 u0 com.*********.settings/.common.OptionTabHostActivity}}}.  It has been .8ms since event, .7ms since wait
 started.  Reason: Waiting because no window has focus but there is a focused application that may eventually add a window when it finishes starting up.

[-  ]I/Process (  ): Sending signal. PID:  SIG:
[-  ]I/dalvikvm(  ): threadid=: reacting to signal
[-  ]I/dalvikvm(  ): Wrote stack traces to '/data/anr/traces.txt'
[-  ]E/ActivityManager(  ): ANR in com.roadrover.settings (com.roadrover.settings/.common.OptionTabHostActivity)
[-  ]E/ActivityManager(  ): Reason: keyDispatchingTimedOut
[-  ]E/ActivityManager(  ): Load: 23.33 / 22.43 / 19.7
[-  ]E/ActivityManager(  ): CPU usage from 33210ms to 0ms ago:

经过分析，发现是可以明显看到，在开始创建窗口，到大约*秒后，系统已经开始分发事件了，此时已经发现没有目标窗口，系统此时已经提醒我们一次了，当然后边呢，目标窗口还是没有创建好，最终就导致ANR了。

可以知道是由于Activity没有顺利执行，刚开始是认为在Activity的onCreate执行失败，但是看了几遍发现onCreate里面没有耗时操作，后来过了几遍log，发现原来是Service里面得一个方法卡住了，导致阻塞了主线程，导致

Activity的onCreate无法顺利执行，而ANR了。