智能座舱多屏项目，中控屏切换语言，后排屏闪黑屏问题

最新推荐文章于 2025-05-03 20:27:50 发布

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最新推荐文章于 2025-05-03 20:27:50 发布

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分类专栏： QNX+Android智能座舱性能问题 QNX+Android智能座舱显示问题文章标签： android 汽车智能手机

本文链接：https://blog.youkuaiyun.com/xuyongqz/article/details/143717001

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QNX+Android智能座舱性能问题同时被 2 个专栏收录

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1. 背景

智能座舱多屏项目，中控屏切换语言，后排屏闪黑屏问题

2. 详细分析过程

通过events log查看activity的生命周期：adb shell logcat -b events

com.android.rwhvac.view.behind.BehindActivity2 : displayId = 2 副屏app
com.android.carsettings.CarSettingActivity: displayId = 0 主屏app
从下面的log可以看出来，在主屏切换语言的时候，主，副屏的app都会relaunch，生命周期重走。

11-07 21:58:07.174  1435  3824 I wm_relaunch_resume_activity: [0,57528784,61,com.android.carsettings/.CarSettingActivity]
11-07 21:58:07.176  1435  3824 I wm_relaunch_resume_activity: [0,188588203,60,com.android.rwhvac/.view.behind.BehindActivity2]
11-07 21:58:07.178  5833  5833 I wm_on_top_resumed_lost_called: [188588203,com.android.rwhvac.view.behind.BehindActivity2,pausing]
11-07 21:58:07.180  5833  5833 I wm_on_paused_called: [188588203,com.android.rwhvac.view.behind.BehindActivity2,performPause]
11-07 21:58:07.187  5833  5833 I wm_on_stop_called: [188588203,com.android.rwhvac.view.behind.BehindActivity2,handleRelaunchActivity]
11-07 21:58:07.240  3154  3154 I wm_on_paused_called: [57528784,com.android.carsettings.CarSettingActivity,performPause]
11-07 21:58:07.241  5833  5833 I wm_on_destroy_called: [188588203,com.android.rwhvac.view.behind.BehindActivity2,performDestroy]
11-07 21:58:07.244  3154  3154 I wm_on_stop_called: [57528784,com.android.carsettings.CarSettingActivity,handleRelaunchActivity]
11-07 21:58:07.280  3154  3154 I wm_on_destroy_called: [57528784,com.android.carsettings.CarSettingActivity,performDestroy]
11-07 21:58:07.284  5833  5833 I wm_on_create_called: [188588203,com.android.rwhvac.view.behind.BehindActivity2,performCreate]
11-07 21:58:07.299  1435  1752 I wm_wallpaper_surface: [0,0,null]
11-07 21:58:07.387  5833  5833 I wm_on_start_called: [188588203,com.android.rwhvac.view.behind.BehindActivity2,handleStartActivity]
11-07 21:58:07.393  5833  5833 I wm_on_resume_called: [188588203,com.android.rwhvac.view.behind.BehindActivity2,RESUME_ACTIVITY]
11-07 21:58:07.400  5833  5833 I wm_on_top_resumed_gained_called: [188588203,com.android.rwhvac.view.behind.BehindActivity2,topWhenResuming]
11-07 21:58:07.400  3154  3154 I wm_on_create_called: [57528784,com.android.carsettings.CarSettingActivity,performCreate]
11-07 21:58:07.448  3154  3154 I wm_on_start_called: [57528784,com.android.carsettings.CarSettingActivity,handleStartActivity]
11-07 21:58:07.537  3154  3154 I wm_on_resume_called: [57528784,com.android.carsettings.CarSettingActivity,RESUME_ACTIVITY]
11-07 21:58:07.606  1435  1561 I wm_wallpaper_surface: [0,1,Window{3092928 u0 com.android.carsettings/com.android.carsettings.CarSettingActivity}]

2.通过堆栈信息可以知，切换语言----configchange----startFreezingScreen，通过log可知，当用户点击前排屏的时候，freezing的是前排屏，后排屏不会冻结，那么出现后排屏闪黑屏，一般是app relaunch 耗时导致的，需要app优化relaunch性能。

11-07 20:05:09.362  1534  4373 W xxx-frozen: startFreezingScreenLocked, app = ProcessRecord{3a565cd 5847:com.android.rwhvac.behindscreen/1000}, this = ActivityRecord{9059fb8 u0 com.android.rwhvac/.view.behind.BehindActivity2} t40}
11-07 20:05:09.362  1534  4373 W xxx-frozen: startFreezingScreen, overrideOriginalDisplayRotation = -1
11-07 20:05:09.366  1534  4373 W xxx-frozen: Set freezing of token = :Token{850ff64 ActivityRecord{9059fb8 u0 com.android.rwhvac/.view.behind.BehindActivity2} t40}} visible= true freezing= false visibleRequested= true, mDisplayContent = Display{#2 state=ON size=1024x274 ROTATION_0}, callstack =
11-07 20:05:09.366  1534  4373 W xxx-frozen: java.lang.Throwable: xxx
11-07 20:05:09.366  1534  4373 W xxx-frozen:         at com.android.server.wm.ActivityRecord.startFreezingScreen(ActivityRecord.java:6532)
11-07 20:05:09.366  1534  4373 W xxx-frozen:         at com.android.server.wm.ActivityRecord.startFreezingScreen(ActivityRecord.java:6519)
11-07 20:05:09.366  1534  4373 W xxx-frozen:         at com.android.server.wm.ActivityRecord.startFreezingScreenLocked(ActivityRecord.java:6514)
11-07 20:05:09.366  1534  4373 W xxx-frozen:         at com.android.server.wm.ActivityRecord.startFreezingScreenLocked(ActivityRecord.java:6493)
11-07 20:05:09.366  1534  4373 W xxx-frozen:         at com.android.server.wm.ActivityRecord.ensureActivityConfiguration(ActivityRecord.java:9441)
11-07 20:05:09.366  1534  4373 W xxx-frozen:         at com.android.server.wm.ActivityRecord.ensureActivityConfiguration(ActivityRecord.java:9297)
11-07 20:05:09.366  1534  4373 W xxx-frozen:         at com.android.server.wm.ActivityTaskManagerService.ensureConfigAndVisibilityAfterUpdate(ActivityTaskManagerService.java:5099)
11-07 20:05:09.366  1534  4373 W xxx-frozen:         at com.android.server.wm.ActivityTaskManagerService.updateConfigurationLocked(ActivityTaskManagerService.java:4385)
11-07 20:05:09.366  1534  4373 W xxx-frozen:         at com.android.server.wm.ActivityTaskManagerService.updateConfigurationLocked(ActivityTaskManagerService.java:4358)
11-07 20:05:09.366  1534  4373 W xxx-frozen:         at com.android.server.wm.ActivityTaskManagerService.updatePersistentConfiguration(ActivityTaskManagerService.java:4348)
11-07 20:05:09.366  1534  4373 W xxx-frozen:         at com.android.server.am.ActivityManagerService.updatePersistentConfigurationWithAttribution(ActivityManagerService.java:15506)
11-07 20:05:09.366  1534  4373 W xxx-frozen:         at com.android.server.am.ActivityManagerService.updatePersistentConfiguration(ActivityManagerService.java:15490)
11-07 20:05:09.366  1534  4373 W xxx-frozen:         at android.app.IActivityManager$Stub.onTransact(IActivityManager.java:3573)
11-07 20:05:09.366  1534  4373 W xxx-frozen:         at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:2678)
11-07 20:05:09.366  1534  4373 W xxx-frozen:         at android.os.Binder.execTransactInternal(Binder.java:1280)
11-07 20:05:09.366  1534  4373 W xxx-frozen:         at android.os.Binder.execTransact(Binder.java:1244)

当用户点击前排屏的时候，freezing的是前排屏。代码逻辑如下：
在这里插入图片描述

在这里插入图片描述

11-07 22:44:41.645  1453  1580 W xxx200: positionChildAt, this = com.android.server.wm.RootWindowContainer@b840de1 positionChildAt: container=Display 0 name="内置屏幕" is not a child of container=ROOT current parent=com.android.server.wm.RootWindowContainer@b840de1 position = 2147483647, callstack =
11-07 22:44:41.645  1453  1580 W xxx200: java.lang.Throwable: xxx
11-07 22:44:41.645  1453  1580 W xxx200:     at com.android.server.wm.WindowContainer.positionChildAt(WindowContainer.java:931)
11-07 22:44:41.645  1453  1580 W xxx200:     at com.android.server.wm.WindowState.handleTapOutsideFocusInsideSelf(WindowState.java:6296)
11-07 22:44:41.645  1453  1580 W xxx200:     at com.android.server.wm.WindowManagerService.onPointerDownOutsideFocusLocked(WindowManagerService.java:8928)
11-07 22:44:41.645  1453  1580 W xxx200:     at com.android.server.wm.WindowManagerService.-$$Nest$monPointerDownOutsideFocusLocked(Unknown Source:0)
11-07 22:44:41.645  1453  1580 W xxx200:     at com.android.server.wm.WindowManagerService$H.handleMessage(WindowManagerService.java:5936)
11-07 22:44:41.645  1453  1580 W xxx200:     at android.os.Handler.dispatchMessage(Handler.java:106)
11-07 22:44:41.645  1453  1580 W xxx200:     at android.os.Looper.loopOnce(Looper.java:201)
11-07 22:44:41.645  1453  1580 W xxx200:     at android.os.Looper.loop(Looper.java:288)
11-07 22:44:41.645  1453  1580 W xxx200:     at android.os.HandlerThread.run(HandlerThread.java:67)
11-07 22:44:41.645  1453  1580 W xxx200:     at com.android.server.ServiceThread.run(ServiceThread.java:44)