指纹解锁亮屏时间 Log 分析

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本篇文章主要介绍 Android 开发中的部分知识点，通过阅读本篇文章，您将收获以下内容:

1.解锁指纹，发送指纹中断Log
2.认证指纹，计算指纹耗时
3.指纹认证成功，keyguard 响应解锁屏流程
4.keyguard 解锁结束，开启动Launcher至绘制工作
5.Launcher 绘制完成，隐藏Keyguard
6.点亮屏幕结束，统计亮屏时间

1. 解锁指纹，发送指纹中断Log

从kernel log中可以查看指纹发送的中断log信息，信息如下：

	Line 1747: 737[03-22 16:04:05.934] <4>[ 1206.056374] c0   174 <blestech_fp>[bf_eint_handler:785]++++irq_handler netlink send+++++,1,0
	Line 1748: 738[03-22 16:04:05.934] <4>[ 1206.056392] c0   174 <blestech_fp>[bf_send_netlink_msg:665]enter, send command 102
	Line 1749: 739[03-22 16:04:05.934] <4>[ 1206.056445] c0   174 <blestech_fp>[bf_send_netlink_msg:707]send done, data length is 32
	Line 1750: 740[03-22 16:04:05.934] <4>[ 1206.056458] c0   174 <blestech_fp>[bf_eint_handler:794]-----irq_handler netlink -----
	Line 1762: 752[03-22 16:04:05.935] <4>[ 1206.057683] c1   612 <blestech_fp>[bf_open:1023] Success to open device.
	Line 1763: 753[03-22 16:04:05.935] <4>[ 1206.057718] c1   612 <blestech_fp>[bf_ioctl:843]BF_IOCTL_ENABLE_INTERRUPT:  command,0

2. 认证指纹，计算指纹耗时

指纹解锁耗时计算
指纹解锁耗时：既从指纹中断（16:04:05.934）到指纹认证成功（16:04:06.003）。
既指纹耗时=1003-934 = 96ms

system log中可以看到 指纹认证（onAuthenticated)，以及认证成功（onAuthenticationSucceeded ）

//指纹认证
00F359 03-22 16:04:06.002   715   715 V FingerprintService: onAuthenticated(owner=com.android.systemui, id=111, gp=0)
//指纹认证成功
00F35A 03-22 16:04:06.003   715   715 V FingerprintService:  onAuthenticationSucceeded by keyguard,may need send launchapp msg
00F35C 03-22 16:04:06.007   715   715 V FingerprintService: Done with client: com.android.systemui

3. 指纹认证成功，keyguard 响应解锁屏流程

指纹 认证成功后，system log 中可以查看到以下信息，Keyguard 开始解锁流程,流程如下：

00F35C 03-22 16:04:06.007   715   715 V FingerprintService: Done with client: com.android.systemui
// SystemUI 唤醒CPU
00F363 03-22 16:04:06.022   715  4341 I PowerManagerService: Waking up from sleep due tocom.android.systemui android.policy:FINGERPRINT (uid=10040 reason=android.policy:FINGERPRINT)...
00F364 03-22 16:04:06.022   715   715 W UsageStatsService: Event reported without a package name
00F36D 03-22 16:04:06.032   715   740 I DisplayPowerController: Blocking screen on until initial contents have been drawn.
//开始准备打开屏幕，进行唤醒操作
00F36E 03-22 16:04:06.032   715   740 I WindowManager: Screen turning on...
00F370 03-22 16:04:06.044   715   715 I WindowManager: Started waking up...
00F370 03-22 16:04:06.044   715   715 I WindowManager: Started waking up...
00F381 03-22 16:04:06.046   715  4341 D PowerManagerService: userActivityNoUpdateLocked: Scene not defined, event:0
00F383 03-22 16:04:06.047   715   738 I DisplayManagerService: Display device changed state: "Built-in Screen", ON
//广播队列添加亮屏广播
00F386 03-22 16:04:06.048   715   715 D BroadcastQueue: Add broadcast <BroadcastRecord{9e27478 u-1 android.intent.action.SCREEN_ON}> into [ordered | foreground], pending size 0

在main log中KeyguardViewMediator 这个调节器类开始进行亮屏时候是否显示锁屏界面等流程。
比如：notifyScreenOn、keyguardDone() 、handleHide、keyguardGoingAway等

//keyguard 调节器通知screen on
00F372 03-22 16:04:06.045  1351  9065 D KeyguardViewMediator: notifyScreenOn
00F373 03-22 16:04:06.045   374   374 D PowerHAL: Enter power_set_interactive: 1
00F374 03-22 16:04:06.045  1351  9065 D KeyguardViewMediator: onStartedWakingUp, seq = 34
00F375 03-22 16:04:06.045  1351  9065 D KeyguardViewMediator: notifyStartedWakingUp
00F37D 03-22 16:04:06.046   374   374 D PowerHAL: ###Exit screen_off scene end###
00F37E 03-22 16:04:06.046   374   374 D PowerHAL: Exit power_set_interactive: 1
//keyguard 调节器执行完成
00F37F 03-22 16:04:06.046  1351  1351 D KeyguardViewMediator: keyguardDone()
00F3AE 03-22 16:04:06.057  1351  1351 D KeyguardViewMediator: handleNotifyScreenTurningOn
00F3BC 03-22 16:04:06.061  1351  1351 D KeyguardViewMediator: handleNotifyWakingUp
00F3BF 03-22 16:04:06.061  1351  1351 D KeyguardUpdateMonitor: FaceLock handleStartedWakingUp
00F458 03-22 16:04:06.077  1351  1351 V KeyguardUpdateMonitor: stopListeningForFaceLock()
//keyguard 结束并因此，开始进入Launcher
00F459 03-22 16:04:06.077  1351  1351 D KeyguardViewMediator: handleKeyguardDone
00F45A 03-22 16:04:06.077  1351  1351 D KeyguardViewMediator: handleHide
//keyguardGoingAway  等待下一个界面绘制完成
00F45B 03-22 16:04:06.077  1351  1351 D KeyguardViewMediator: keyguardGoingAway

4.keyguard 解锁结束，开启动Launcher至绘制工作

event log中可以看到keyguard 解锁结束后开始启动Launcher 。

//开启启动Launcher
00F466 03-22 16:04:06.079   715  2015 I am_set_resumed_activity: [0,com.android.launcher3/com.android.searchlauncher.SearchLauncher,resumeTopActivityInnerLocked]
00F48F 03-22 16:04:06.085   715  2015 I am_resume_activity: [0,77745185,3,com.android.launcher3/com.android.searchlauncher.SearchLauncher]

在main log中可以看到Launcher 绘制完成。

//SurfaceFlinger 完成Launcher 绘制
00F54A 03-22 16:04:06.534  1351  1351 D KeyguardUpdateMonitor: handleBatteryUpdate
00F54D 03-22 16:04:06.535   380   380 D SurfaceFlinger: duplicate layer name: changing com.android.launcher3/com.android.searchlauncher.SearchLauncher to com.android.launcher3/com.android.searchlauncher.SearchLauncher#1

Launcher 绘制耗时计算
Launcher 绘制耗时计算=绘制完成（16:04:06.535）- 开始启动(16:04:06.079)=458ms(535ms-79ms)

5.Launcher 绘制完成，隐藏Keyguard

在system log 中可以看到Launcher 绘制完成后，keyguard收到回调，隐藏keygaurd。

//keyguard收到回调，隐藏keygaurd
00F577 03-22 16:04:06.588  1351  1351 D KeyguardViewMediator: handleStartKeyguardExitAnimation startTime=1206710 fadeoutDuration=0
00F578 03-22 16:04:06.588  1351  1351 D KeyguardViewMediator: isSimPinOrPuk =false
00F579 03-22 16:04:06.588   715  6388 D WindowManager: mKeyguardDelegate.ShowListener.onDrawn.
// KeyguardDrawComplete 结束后并隐藏
00F57A 03-22 16:04:06.589   715   730 W WindowManager: Setting mKeyguardDrawComplete
00F592 03-22 16:04:06.604  1351  1351 V KeyguardDisplayManager: hide
//窗口焦点在 Launcher上
00F5BE 03-22 16:04:06.621   715  1590 D WindowManager: Input focus has changed to Window{3393c4a u0 com.android.launcher3/com.android.searchlauncher.SearchLauncher}
0

6.电量屏幕结束，统计亮屏时间

system log中搜索关键字 Screen on took， 即可查看总亮屏耗时。

总亮屏耗时
总亮屏耗时（798ms）= 亮屏结束Finished waking up(16:04:06.820)- 屏幕开始打开Screen turning on...(03-22 16:04:06.032)

// 绘制结束，显示所有窗口
00F68B 03-22 16:04:06.816   715   738 I WindowManager: All windows ready for display!
00F68C 03-22 16:04:06.817   715   730 W WindowManager: Setting mWindowManagerDrawComplete
00F692 03-22 16:04:06.819   715   730 D WindowManager: finishScreenTurningOn: mAwake=true, mScreenOnEarly=true, mScreenOnFully=false, mKeyguardDrawComplete=true, mWindowManagerDrawComplete=true
//结束亮屏流程，统计 亮屏时间
00F693 03-22 16:04:06.819   715   730 I WindowManager: Finished screen turning on...
00F695 03-22 16:04:06.819   715   740 I DisplayPowerController: Unblocked screen on after 787 ms
00F69A 03-22 16:04:06.820   715   740 W PowerManagerService: Screen on took 798 ms(now:1206942 mLastWakeTime:1206144)
//结束wake up 流程
00F69B 03-22 16:04:06.821   715   715 I WindowManager: Finished waking up...

至此，本篇已结束，如有不对的地方，欢迎您的建议与指正。同时期待您的关注，感谢您的阅读，谢谢！