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ACTION_USER_UNLOCKED发送分析

源码分析4个月前更新 biumall
276 00
自动化零件服务商 - 供应SMC,FESTO,CKD全新正品气动元件
目录

前言

记录一下Android开机时ACTION_USER_UNLOCKED和ACTION_BOOT_COMPLETED啥时候发送的过程记录，主要是方便自己回顾。

Android P分析为例。

正文

本文跟《Android开机动画关闭源码分析》存在大量重复，这就简单过一下。

ResumeActivityItem.java

execute()
biumall.com
  1. @Override
  2. public void execute(ClientTransactionHandler client, IBinder token,
  3.         PendingTransactionActions pendingActions) {
  4.     // 看子类ActivityThread.java的实现
  5.     client.handleResumeActivity(token, true /* finalStateRequest */, mIsForward,
  6.             "RESUME_ACTIVITY");
  7. }
复制

ActivityThread.java

handleResumeActivity()
biumall.com
  1. @Override
  2. public void handleResumeActivity(IBinder token, boolean finalStateRequest, boolean isForward,
  3.         String reason) {
  4.     //略
  5.     //[重]就是调用onResume()
  6.     final ActivityClientRecord r = performResumeActivity(token, finalStateRequest, reason);
  7.     if (r == null) {
  8.         return;
  9.     }
  10.     //略
  11.     r.nextIdle = mNewActivities;
  12.     mNewActivities = r;
  13.     //[重] 这个是表示onResume()进入idler状态啦
  14.     Looper.myQueue().addIdleHandler(new Idler());
  15. }
复制

performResumeActivity()不是这次的关心点，我们看addIdleHandler()。

这里添加了一个Idler对象，这部分看MessageQueue类。

反正就是MessageQueue总的next()会调用Idler对象，具体看《Android开机动画关闭源码分析》

Idler
biumall.com
  1. private class Idler implements MessageQueue.IdleHandler {
  2.     @Override
  3.     public final boolean queueIdle() {
  4.         ActivityClientRecord a = mNewActivities;
  5.         boolean stopProfiling = false;
  6.         if (mBoundApplication != null && mProfiler.profileFd != null
  7.                 && mProfiler.autoStopProfiler) {
  8.             stopProfiling = true;
  9.         }
  10.         if (a != null) {
  11.             mNewActivities = null;
  12.             //获取ActivityManagerService
  13.             IActivityManager am = ActivityManager.getService();
  14.             ActivityClientRecord prev;
  15.             do {
  16.                 if (a.activity != null && !a.activity.mFinished) {
  17.                     try {
  18.                         //[重]，看这里
  19.                         am.activityIdle(a.token, a.createdConfig, stopProfiling);
  20.                         a.createdConfig = null;
  21.                     } catch (RemoteException ex) {
  22.                         throw ex.rethrowFromSystemServer();
  23.                     }
  24.                 }
  25.                 prev = a;
  26.                 a = a.nextIdle;
  27.                 prev.nextIdle = null;
  28.             } while (a != null);
  29.         }
  30.         if (stopProfiling) {
  31.             mProfiler.stopProfiling();
  32.         }
  33.         ensureJitEnabled();
  34.         return false;
  35.     }
  36. }
复制

这里的am就是ActivityManagerService。

ActivityManagerService.java

activityIdle()
biumall.com
  1. @Override
  2. public final void activityIdle(IBinder token, Configuration config, boolean stopProfiling) {
  3.     final long origId = Binder.clearCallingIdentity();
  4.     synchronized (this) {
  5.         ActivityStack stack = ActivityRecord.getStackLocked(token);
  6.         //不为null,
  7.         if (stack != null) {
  8.             //关注这个activityIdleInternalLocked
  9.             //mStackSupervisor是ActivityStackSupervisor对象
  10.             ActivityRecord r =
  11.                     mStackSupervisor.activityIdleInternalLocked(token, false /* fromTimeout */,
  12.                             false /* processPausingActivities */, config);
  13.             //false
  14.             if (stopProfiling) {
  15.                 if ((mProfileProc == r.app) && mProfilerInfo != null) {
  16.                     clearProfilerLocked();
  17.                 }
  18.             }
  19.         }
  20.     }
  21.     Binder.restoreCallingIdentity(origId);
  22. }
复制

ActivityStackSupervisor.java

activityIdleInternalLocked()
biumall.com
  1. @GuardedBy("mService")
  2. final ActivityRecord activityIdleInternalLocked(final IBinder token, boolean fromTimeout,
  3.         boolean processPausingActivities, Configuration config) {
  4.     ActivityRecord r = ActivityRecord.forTokenLocked(token);
  5.     //略
  6.     //r不为null
  7.     if (r != null) {
  8.         //移除IDLE_TIMEOUT_MSG
  9.         mHandler.removeMessages(IDLE_TIMEOUT_MSG, r);
  10.         r.finishLaunchTickingLocked();
  11.         //略
  12.         //第一个为true，满足条件
  13.         //fromTimeout为false，没有超时
  14.         if (isFocusedStack(r.getStack()) || fromTimeout) {
  15.             //true [重]，这个检测是否开机成功
  16.             booting = checkFinishBootingLocked();
  17.         }
  18.     }
  19.     //true
  20.     if (allResumedActivitiesIdle()) {
  21.         if (r != null) {
  22.             mService.scheduleAppGcsLocked();
  23.         }
  24.         if (mLaunchingActivity.isHeld()) {
  25.             //略
  26.         }
  27.         //就是遍历Activity状态啥的，不是我们关系的
  28.         ensureActivitiesVisibleLocked(null, 0, !PRESERVE_WINDOWS);
  29.     }
  30.     //略
  31.     mService.trimApplications();
  32.     //activityRemoved = false
  33.     if (activityRemoved) {
  34.         resumeFocusedStackTopActivityLocked();
  35.     }
  36.     return r;
  37. }
复制

重点关心

biumall.com
  1. booting = checkFinishBootingLocked();
复制
checkFinishBootingLocked()
biumall.com
  1. @GuardedBy("mService")
  2. private boolean checkFinishBootingLocked() {
  3.     final boolean booting = mService.mBooting;
  4.     boolean enableScreen = false;
  5.     mService.mBooting = false;
  6.     //false
  7.     if (!mService.mBooted) {
  8.         mService.mBooted = true;
  9.         enableScreen = true;
  10.     }
  11.     // booting = true, 
  12.     //enableScreen = true
  13.     if (booting || enableScreen) {
  14.         //进入这里，两个都是为true
  15.         mService.postFinishBooting(booting, enableScreen);
  16.     }
  17.     return booting;
  18. }
复制

ActivityManagerService.java

biumall.com
  1. void postFinishBooting(boolean finishBooting, boolean enableScreen) {
  2.     mHandler.sendMessage(mHandler.obtainMessage(FINISH_BOOTING_MSG,
  3.             finishBooting ? 1 : 0, enableScreen ? 1 : 0));
  4. }
复制

发送的消息是FINISH_BOOTING_MSG

finishBooting和enableScreen都为true，因此msg.arg1和msg.arg2都为1

handleMessage()

是在MainHandler类中

biumall.com
  1. final class MainHandler extends Handler {
  2.     //略
  3.     @Override
  4.     public void handleMessage(Message msg) {
  5.      switch (msg.what) {
  6.         //略
  7.          case FINISH_BOOTING_MSG: {
  8.              if (msg.arg1 != 0) {//为1
  9.                 finishBooting();
  10.              }
  11.              if (msg.arg2 != 0) {//为1
  12.                 enableScreenAfterBoot();
  13.              }
  14.              break;
  15.          }
  16.         //略
  17.      }
  18.     }
  19. }
复制
finishBooting()

第一次是mBootAnimationComplete为false，进入if语句后，仅mCallFinishBooting置为true，然后return。

biumall.com
  1. final void finishBooting() {
  2.     synchronized (this) {
  3. 		//mBootAnimationComplete此时为false
  4.         if (!mBootAnimationComplete) {
  5.             mCallFinishBooting = true;
  6.             return;
  7.         }
  8.         mCallFinishBooting = false;
  9.     }
  10. 	//略
  11. }
复制
enableScreenAfterBoot()
biumall.com
  1. void enableScreenAfterBoot() {
  2. 	//调用的WindowManagerService.enableScreenAfterBoot()
  3.     mWindowManager.enableScreenAfterBoot();
  4.     synchronized (this) {
  5.         updateEventDispatchingLocked();
  6.     }
  7. }
复制

WindowManagerService.java

enableScreenAfterBoot()
biumall.com
  1. public void enableScreenAfterBoot() {
  2.     synchronized(mWindowMap) {
  3. 		//false
  4.         if (mSystemBooted) {
  5.             return;
  6.         }
  7. 		//置为true，后面会用到
  8.         mSystemBooted = true;
  9. 		//处理处理boot弹框提示[Android系统正在启动或者Android系统正在升级的dialog提示]
  10. 		//里面的mShowingBootMessages条件不满足，这里不关心
  11.         hideBootMessagesLocked();
  12.         //发送超时30s处理
  13.         mH.sendEmptyMessageDelayed(H.BOOT_TIMEOUT, 30 * 1000);
  14.     }
  15. 	//mPolicy是PhoneWindowManager对象，这里暂不关心
  16.     mPolicy.systemBooted();
  17. 	//重点
  18.     performEnableScreen();
  19. }
复制
performEnableScreen()
biumall.com
  1. private void performEnableScreen() {
  2.     synchronized(mWindowMap) {
  3. 		//false
  4.         if (mDisplayEnabled) {
  5.             return;
  6.         }
  7. 		//mSystemBooted为true, mShowingBootMessages=false
  8. 		if (!mSystemBooted && !mShowingBootMessages) {
  9.             return;
  10.         }
  11. 		//mShowingBootMessages设置成了false，关键判断canDismissBootAnimation()
  12. 		//canDismissBootAnimation()返回false，因此这里直接return了
  13. 		if (!mShowingBootMessages && !mPolicy.canDismissBootAnimation()) {
  14.             return;
  15.         }
  16. 		//略
  17.     }
  18. 	//略
  19. }
复制

这个方法很重要，会反复进入，上面由于条件不支持，进入直接return了。

打印日志大致如下(部分)：

biumall.com
  1. WindowManagerService: ENABLE_SCREEN performEnableScreen
  2. WindowManagerService: performEnableScreen ---------1----------
  3. WindowManagerService: performEnableScreen 2 mDisplayEnabled :false
  4. WindowManagerService: performEnableScreen 3 mSystemBooted :true , mShowingBootMessages: false
  5. WindowManagerService: performEnableScreen 4 mPolicy.canDismissBootAnimation() :false
  6. WindowManagerService: ENABLE_SCREEN performEnableScreen
  7. WindowManagerService: performEnableScreen ---------1----------
  8. WindowManagerService: performEnableScreen 2 mDisplayEnabled :false
  9. WindowManagerService: performEnableScreen 3 mSystemBooted :true , mShowingBootMessages: false
  10. WindowManagerService: performEnableScreen 4 mPolicy.canDismissBootAnimation() :false
  11. WindowManagerService: ENABLE_SCREEN performEnableScreen
  12. WindowManagerService: performEnableScreen ---------1----------
  13. WindowManagerService: performEnableScreen 2 mDisplayEnabled :false
  14. WindowManagerService: performEnableScreen 3 mSystemBooted :true , mShowingBootMessages: false
  15. WindowManagerService: performEnableScreen 4 mPolicy.canDismissBootAnimation() :false
  16. WindowManagerService: ENABLE_SCREEN performEnableScreen
  17. WindowManagerService: performEnableScreen ---------1----------
  18. WindowManagerService: performEnableScreen 2 mDisplayEnabled :false
  19. WindowManagerService: performEnableScreen 3 mSystemBooted :true , mShowingBootMessages: false
  20. WindowManagerService: performEnableScreen 4 mPolicy.canDismissBootAnimation() :false
  21. WindowManagerService: ENABLE_SCREEN performEnableScreen
  22. WindowManagerService: performEnableScreen ---------1----------
  23. WindowManagerService: performEnableScreen 2 mDisplayEnabled :false
  24. WindowManagerService: performEnableScreen 3 mSystemBooted :true , mShowingBootMessages: false
  25. WindowManagerService: performEnableScreen 4 mPolicy.canDismissBootAnimation() :false
  26. WindowManagerService: ENABLE_SCREEN performEnableScreen
  27. WindowManagerService: performEnableScreen ---------1----------
  28. WindowManagerService: performEnableScreen 2 mDisplayEnabled :false
  29. WindowManagerService: performEnableScreen 3 mSystemBooted :true , mShowingBootMessages: false
  30. WindowManagerService: performEnableScreen 4 mPolicy.canDismissBootAnimation() :false
  31. WindowManagerService: ENABLE_SCREEN performEnableScreen
  32. WindowManagerService: performEnableScreen ---------1----------
  33. WindowManagerService: performEnableScreen 2 mDisplayEnabled :false
  34. WindowManagerService: performEnableScreen 3 mSystemBooted :true , mShowingBootMessages: false
  35. WindowManagerService: performEnableScreen 4 mPolicy.canDismissBootAnimation() :true
  36. WindowManagerService: performEnableScreen 5 mForceDisplayEnabled :false
  37. WindowManagerService: performEnableScreen 6 checkWaitingForWindows() :true
  38. WindowManagerService: ENABLE_SCREEN performEnableScreen
  39. WindowManagerService: performEnableScreen ---------1----------
  40. WindowManagerService: performEnableScreen 2 mDisplayEnabled :false
  41. WindowManagerService: performEnableScreen 3 mSystemBooted :true , mShowingBootMessages: false
  42. WindowManagerService: performEnableScreen 4 mPolicy.canDismissBootAnimation() :true
  43. WindowManagerService: performEnableScreen 5 mForceDisplayEnabled :false
  44. WindowManagerService: performEnableScreen 6 checkWaitingForWindows() :true
  45. WindowManagerService: ENABLE_SCREEN performEnableScreen
  46. WindowManagerService: performEnableScreen ---------1----------
  47. WindowManagerService: performEnableScreen 2 mDisplayEnabled :false
  48. WindowManagerService: performEnableScreen 3 mSystemBooted :true , mShowingBootMessages: false
  49. WindowManagerService: performEnableScreen 4 mPolicy.canDismissBootAnimation() :true
  50. WindowManagerService: performEnableScreen 5 mForceDisplayEnabled :false
  51. WindowManagerService: performEnableScreen 6 checkWaitingForWindows() :true
  52. WindowManagerService: ENABLE_SCREEN performEnableScreen
  53. WindowManagerService: performEnableScreen ---------1----------
  54. WindowManagerService: performEnableScreen 2 mDisplayEnabled :false
  55. WindowManagerService: performEnableScreen 3 mSystemBooted :true , mShowingBootMessages: false
  56. WindowManagerService: performEnableScreen 4 mPolicy.canDismissBootAnimation() :true
  57. WindowManagerService: performEnableScreen 5 mForceDisplayEnabled :false
  58. WindowManagerService: performEnableScreen 6 checkWaitingForWindows() :true
  59. WindowManagerService: ENABLE_SCREEN performEnableScreen
  60. WindowManagerService: performEnableScreen ---------1----------
  61. WindowManagerService: performEnableScreen 2 mDisplayEnabled :false
  62. WindowManagerService: performEnableScreen 3 mSystemBooted :true , mShowingBootMessages: false
  63. WindowManagerService: performEnableScreen 4 mPolicy.canDismissBootAnimation() :true
  64. WindowManagerService: performEnableScreen 5 mForceDisplayEnabled :false
  65. WindowManagerService: performEnableScreen 6 checkWaitingForWindows() :true
  66. WindowManagerService: ENABLE_SCREEN performEnableScreen
  67. WindowManagerService: performEnableScreen ---------1----------
  68. WindowManagerService: performEnableScreen 2 mDisplayEnabled :false
  69. WindowManagerService: performEnableScreen 3 mSystemBooted :true , mShowingBootMessages: false
  70. WindowManagerService: performEnableScreen 4 mPolicy.canDismissBootAnimation() :true
  71. WindowManagerService: performEnableScreen 5 mForceDisplayEnabled :false
  72. WindowManagerService: performEnableScreen 6 checkWaitingForWindows() :true
  73. WindowManagerService: ENABLE_SCREEN performEnableScreen
  74. WindowManagerService: performEnableScreen ---------1----------
  75. WindowManagerService: performEnableScreen 2 mDisplayEnabled :false
  76. WindowManagerService: performEnableScreen 3 mSystemBooted :true , mShowingBootMessages: false
  77. WindowManagerService: performEnableScreen 4 mPolicy.canDismissBootAnimation() :true
  78. WindowManagerService: performEnableScreen 5 mForceDisplayEnabled :false
  79. WindowManagerService: performEnableScreen 6 checkWaitingForWindows() :false
  80. WindowManagerService: performEnableScreen 7 mBootAnimationStopped :false
  81. WindowManagerService: performEnableScreen 8 mForceDisplayEnabled :false
  82. WindowManagerService: ENABLE_SCREEN performEnableScreen
  83. WindowManagerService: performEnableScreen ---------1----------
  84. WindowManagerService: performEnableScreen 2 mDisplayEnabled :false
  85. WindowManagerService: performEnableScreen 3 mSystemBooted :true , mShowingBootMessages: false
  86. WindowManagerService: performEnableScreen 4 mPolicy.canDismissBootAnimation() :true
  87. WindowManagerService: performEnableScreen 5 mForceDisplayEnabled :false
  88. WindowManagerService: performEnableScreen 6 checkWaitingForWindows() :false
  89. WindowManagerService: performEnableScreen 7 mBootAnimationStopped :true
  90. WindowManagerService: performEnableScreen 8 mForceDisplayEnabled :false
  91. WindowManagerService: ENABLE_SCREEN performEnableScreen
  92. WindowManagerService: performEnableScreen ---------1----------
  93. WindowManagerService: performEnableScreen 2 mDisplayEnabled :false
  94. WindowManagerService: performEnableScreen 3 mSystemBooted :true , mShowingBootMessages: false
  95. WindowManagerService: performEnableScreen 4 mPolicy.canDismissBootAnimation() :true
  96. WindowManagerService: performEnableScreen 5 mForceDisplayEnabled :false
  97. WindowManagerService: performEnableScreen 6 checkWaitingForWindows() :false
  98. WindowManagerService: performEnableScreen 7 mBootAnimationStopped :true
  99. WindowManagerService: performEnableScreen 8 mForceDisplayEnabled :false
  100. WindowManagerService: performEnableScreen ---------1----------
  101. WindowManagerService: performEnableScreen 2 mDisplayEnabled :false
  102. WindowManagerService: performEnableScreen 3 mSystemBooted :true , mShowingBootMessages: false
  103. WindowManagerService: performEnableScreen 4 mPolicy.canDismissBootAnimation() :true
  104. WindowManagerService: performEnableScreen 5 mForceDisplayEnabled :false
  105. WindowManagerService: performEnableScreen 6 checkWaitingForWindows() :false
  106. WindowManagerService: performEnableScreen 7 mBootAnimationStopped :true
  107. WindowManagerService: performEnableScreen 8 mForceDisplayEnabled :false
  108. WindowManagerService: performEnableScreen 9  :
  109. WindowManagerService: performEnableScreen 10 surfaceFlinger :android.os.BinderProxy@91905a0
  110. WindowManagerService: performEnableScreen ******* TELLING SURFACE FLINGER WE ARE BOOTED!
  111. WindowManagerService: performEnableScreen ******************** ENABLING SCREEN!
复制

经过多次的执行performEnableScreen()，最终结束开机动画

biumall.com
  1. private void performEnableScreen() {
  2.     synchronized(mWindowMap) {
  3. 	    //false
  4.         if (mDisplayEnabled) {
  5.             return;
  6.         }
  7. 		//mSystemBooted = true,  mShowingBootMessages = false
  8.         if (!mSystemBooted && !mShowingBootMessages) {
  9.             return;
  10.         }
  11. 		//mShowingBootMessages= false
  12. 		//mPolicy.canDismissBootAnimation()一开始为false，后为true
  13. 		//具体看PhoneWindowManager.java
  14.         if (!mShowingBootMessages && !mPolicy.canDismissBootAnimation()) {
  15.             return;
  16.         }
  17.         // mForceDisplayEnabled默认为false，强制性显示屏幕意思，也就是开机超时
  18. 		// 超时设置为30s，具体看enableScreenAfterBoot()
  19. 		// checkWaitingForWindows()一开始为false，后面为true
  20.         if (!mForceDisplayEnabled
  21.                 && getDefaultDisplayContentLocked().checkWaitingForWindows()) {
  22.             return;
  23.         }
  24. 		//第一次肯定为false
  25.         if (!mBootAnimationStopped) {
  26.             //退出开机动画
  27. 			//service.bootanim.exit属性值为1，标志系统要结束开机动画了
  28.             SystemProperties.set("service.bootanim.exit", "1");
  29. 			//置为true，
  30.             mBootAnimationStopped = true;
  31.         }
  32.         //mForceDisplayEnabled 为false，上面解释过了
  33. 		//checkBootAnimationCompleteLocked()检查开机动画是否完成，退出需要时间和设置其他状态
  34.         if (!mForceDisplayEnabled && !checkBootAnimationCompleteLocked()) {
  35.             return;
  36.         }
  37.         //BOLT_BOOTANIM =  true
  38.         if (android.os.Bolt.BOLT_BOOTANIM) {
  39.             try {
  40. 				//关闭开机动画，还可以用adb shell控制，之前有文章写过
  41.                 SystemProperties.set("ctl.stop", "bootanim");
  42.             } catch (Exception e) {
  43.                 Slog.e(android.os.Bolt.TAG, "Try 'setprop ctl.stop bootanim' failed. Check SELinux policy.");
  44.             }
  45.         } else {
  46. 			//略，因为我这走上面，这里就懒得看了
  47.         }
  48.         mDisplayEnabled = true;
  49.     }
  50.     try {
  51. 		//开机动画结束
  52. 		//ActivityManagerService.java
  53.         mActivityManager.bootAnimationComplete();
  54.     } catch (RemoteException e) {
  55.     }
  56. 	//PhoneWindowManager.java
  57.     mPolicy.enableScreenAfterBoot();
  58.     updateRotationUnchecked(false, false);
  59. }
复制

至此，开机动画退出了。但用户还没创建，我们这里关注

biumall.com
  1. mActivityManager.bootAnimationComplete();
复制

ActivityManagerService.java

bootAnimationComplete()
biumall.com
  1. @Override
  2. public void bootAnimationComplete() {
  3.     final boolean callFinishBooting;
  4.     synchronized (this) {
  5.         callFinishBooting = mCallFinishBooting;
  6.         mBootAnimationComplete = true;
  7.     }
  8. 	//true
  9.     if (callFinishBooting) {
  10.         finishBooting();
  11.     }
  12. }
复制
finishBooting()
biumall.com
  1. final void finishBooting() {
  2.     synchronized (this) {
  3. 		//mBootAnimationComplete此时为true,不会return
  4.         if (!mBootAnimationComplete) {
  5.             mCallFinishBooting = true;
  6.             return;
  7.         }
  8.         mCallFinishBooting = false;
  9.     }
  10.     ArraySet<String> completedIsas = new ArraySet<String>();
  11. 	//开机完成设置abis[arm64-v8a,armeabi-v7a,armeabi]
  12.     for (String abi : Build.SUPPORTED_ABIS) {
  13.         zygoteProcess.establishZygoteConnectionForAbi(abi);
  14.         final String instructionSet = VMRuntime.getInstructionSet(abi);
  15.         if (!completedIsas.contains(instructionSet)) {
  16.             try {
  17.                 mInstaller.markBootComplete(VMRuntime.getInstructionSet(abi));
  18.             } catch (InstallerException e) {
  19.                 Slog.w(TAG, "Unable to mark boot complete for abi: " + abi + " (" +
  20.                         e.getMessage() +")");
  21.             }
  22.             completedIsas.add(instructionSet);
  23.         }
  24.     }
  25. 	//注册应用重启广播
  26.     IntentFilter pkgFilter = new IntentFilter();
  27.     pkgFilter.addAction(Intent.ACTION_QUERY_PACKAGE_RESTART);
  28.     pkgFilter.addDataScheme("package");
  29.     mContext.registerReceiver(new BroadcastReceiver() {
  30.         @Override
  31.         public void onReceive(Context context, Intent intent) {
  32.             String[] pkgs = intent.getStringArrayExtra(Intent.EXTRA_PACKAGES);
  33.             if (pkgs != null) {
  34.                 for (String pkg : pkgs) {
  35.                     synchronized (ActivityManagerService.this) {
  36. 						//强制性停止某个包名
  37.                         if (forceStopPackageLocked(pkg, -1, false, false, false, false, false,
  38.                                 0, "query restart")) {
  39.                             setResultCode(Activity.RESULT_OK);
  40.                             return;
  41.                         }
  42.                     }
  43.                 }
  44.             }
  45.         }
  46.     }, pkgFilter);
  47. 	//注册ACTION_DELETE_DUMPHEAP广播
  48.     IntentFilter dumpheapFilter = new IntentFilter();
  49.     dumpheapFilter.addAction(DumpHeapActivity.ACTION_DELETE_DUMPHEAP);
  50.     mContext.registerReceiver(new BroadcastReceiver() {
  51.         @Override
  52.         public void onReceive(Context context, Intent intent) {
  53.             if (intent.getBooleanExtra(DumpHeapActivity.EXTRA_DELAY_DELETE, false)) {
  54.                 mHandler.sendEmptyMessageDelayed(POST_DUMP_HEAP_NOTIFICATION_MSG, 5*60*1000);
  55.             } else {
  56.                 mHandler.sendEmptyMessage(POST_DUMP_HEAP_NOTIFICATION_MSG);
  57.             }
  58.         }
  59.     }, dumpheapFilter);
  60.     //通知系统服务开机完成
  61.     //这里就SystemServer中启动的服务
  62.     //类似的可以参考《StorageManagerService的启动》中Lifecycle就是一个服务。
  63.     mSystemServiceManager.startBootPhase(SystemService.PHASE_BOOT_COMPLETED);
  64.     synchronized (this) {
  65.         final int NP = mProcessesOnHold.size();
  66. 		//之前onhold的进程，开始启动
  67. 		 Slog.d(TAG, "finishBooting 6 NP : "+ NP);
  68.         if (NP > 0) {
  69.             ArrayList<ProcessRecord> procs =
  70.                 new ArrayList<ProcessRecord>(mProcessesOnHold);
  71.             for (int ip=0; ip<NP; ip++) {
  72.                 startProcessLocked(procs.get(ip), "on-hold", null);
  73.             }
  74.         }
  75.         if (mFactoryTest == FactoryTest.FACTORY_TEST_LOW_LEVEL) {
  76.             return;
  77.         }
  78.         Message nmsg = mHandler.obtainMessage(CHECK_EXCESSIVE_POWER_USE_MSG);
  79.         mHandler.sendMessageDelayed(nmsg, mConstants.POWER_CHECK_INTERVAL);
  80.         SystemProperties.set("sys.boot_completed", "1");
  81.  
  82.         if (!"trigger_restart_min_framework".equals(SystemProperties.get("vold.decrypt"))
  83.                 || "".equals(SystemProperties.get("vold.encrypt_progress"))) {
  84.             SystemProperties.set("dev.bootcomplete", "1");
  85.         }
  86.         //调用mUserController发送sendBootCompleted
  87.         mUserController.sendBootCompleted(
  88.                 new IIntentReceiver.Stub() {
  89.                     @Override
  90.                     public void performReceive(Intent intent, int resultCode,
  91.                             String data, Bundle extras, boolean ordered,
  92.                             boolean sticky, int sendingUser) {
  93.                         synchronized (ActivityManagerService.this) {
  94.                             requestPssAllProcsLocked(SystemClock.uptimeMillis(), true, false);
  95.                         }
  96.                     }
  97.                 });
  98.         mUserController.scheduleStartProfiles();
  99.     }
  100.     mAnrManager.writeEvent(AnrManager.EVENT_BOOT_COMPLETED);
  101. }
复制

上面比较重要的是：

  1. mSystemServiceManager调用startBootPhase()，这里会通知SystemService中添加的所有服务

  2. mUserController调用sendBootCompleted，通知发送Boot Completed

我们主要关注第二点。

UserController.java

sendBootCompleted()
biumall.com
  1. void sendBootCompleted(IIntentReceiver resultTo) {
  2.     SparseArray<UserState> startedUsers;
  3.     synchronized (mLock) {
  4.         startedUsers = mStartedUsers.clone();
  5.     }
  6. 	//此时至少有一个用户
  7.     for (int i = 0; i < startedUsers.size(); i++) {
  8.         UserState uss = startedUsers.valueAt(i);
  9. 		//执行finishUserBoot
  10.         finishUserBoot(uss, resultTo);
  11.     }
  12. }
复制
finishUserBoot()
biumall.com
  1. private void finishUserBoot(UserState uss, IIntentReceiver resultTo) {
  2.     final int userId = uss.mHandle.getIdentifier();
  3.     synchronized (mLock) {
  4. 		 //用户不匹配则返回
  5.         if (mStartedUsers.get(userId) != uss) {
  6.             return;
  7.         }
  8.     }
  9. 	 //如果用户在锁定状态
  10.     if (uss.setState(STATE_BOOTING, STATE_RUNNING_LOCKED)) {
  11.         mInjector.getUserManagerInternal().setUserState(userId, uss.state);
  12.         if (userId == UserHandle.USER_SYSTEM
  13.                 && !mInjector.isRuntimeRestarted() && !mInjector.isFirstBootOrUpgrade()) {
  14.             int uptimeSeconds = (int)(SystemClock.elapsedRealtime() / 1000);
  15.             MetricsLogger.histogram(mInjector.getContext(),
  16.                     "framework_locked_boot_completed", uptimeSeconds);
  17.             final int MAX_UPTIME_SECONDS = 120;
  18.             if (uptimeSeconds > MAX_UPTIME_SECONDS) {
  19.                 if ("user".equals(Build.TYPE)) {
  20.                     Slog.wtf("SystemServerTiming",
  21.                         "finishUserBoot took too long. uptimeSeconds=" + uptimeSeconds);
  22.                 } else {
  23.                     Slog.w("SystemServerTiming",
  24.                         "finishUserBoot took too long. uptimeSeconds=" + uptimeSeconds);
  25.                 }
  26.             }
  27.         }
  28. 		//发送锁屏开机广播
  29.         mHandler.sendMessage(mHandler.obtainMessage(REPORT_LOCKED_BOOT_COMPLETE_MSG,
  30.                 userId, 0));
  31.         Intent intent = new Intent(Intent.ACTION_LOCKED_BOOT_COMPLETED, null);
  32.         intent.putExtra(Intent.EXTRA_USER_HANDLE, userId);
  33.         intent.addFlags(Intent.FLAG_RECEIVER_NO_ABORT
  34.                 | Intent.FLAG_RECEIVER_INCLUDE_BACKGROUND);
  35.         mInjector.broadcastIntent(intent, null, resultTo, 0, null, null,
  36.                 new String[]{android.Manifest.permission.RECEIVE_BOOT_COMPLETED},
  37.                 AppOpsManager.OP_NONE, null, true, false, MY_PID, SYSTEM_UID, userId);
  38.     }
  39.  
  40.     //解锁用户的credential-encrypted storage
  41. 	//false
  42.     if (mInjector.getUserManager().isManagedProfile(userId)) {
  43.         final UserInfo parent = mInjector.getUserManager().getProfileParent(userId);
  44.         if (parent != null
  45.                 && isUserRunning(parent.id, ActivityManager.FLAG_AND_UNLOCKED)) {
  46.             Slog.d(TAG, "User " + userId + " (parent " + parent.id
  47.                     + "): attempting unlock because parent is unlocked");
  48.             maybeUnlockUser(userId);
  49.         } else {
  50.             String parentId = (parent == null) ? "<null>" : String.valueOf(parent.id);
  51.             Slog.d(TAG, "User " + userId + " (parent " + parentId
  52.                     + "): delaying unlock because parent is locked");
  53.         }
  54.     } else {
  55.         maybeUnlockUser(userId);
  56.     }
  57. }
复制
maybeUnlockUser()
biumall.com
  1. private boolean maybeUnlockUser(final int userId) {
  2.     return unlockUserCleared(userId, null, null, null);
  3. }
复制
unlockUserCleared()
biumall.com
  1. private boolean unlockUserCleared(final int userId, byte[] token, byte[] secret,
  2.         IProgressListener listener) {
  3.     UserState uss;
  4. 	//解锁user storage,isUserKeyUnlocked()返回true，但取反就false
  5. 	if (!StorageManager.isUserKeyUnlocked(userId)) {
  6.         final UserInfo userInfo = getUserInfo(userId);
  7.         final IStorageManager storageManager = getStorageManager();
  8.         try {
  9.             // We always want to unlock user storage, even user is not started yet
  10.             storageManager.unlockUserKey(userId, userInfo.serialNumber, token, secret);
  11.         } catch (RemoteException | RuntimeException e) {
  12.             Slog.w(TAG, "Failed to unlock: " + e.getMessage());
  13.         }
  14.     }
  15.     synchronized (mLock) {
  16.         // Register the given listener to watch for unlock progress
  17.         uss = mStartedUsers.get(userId);
  18. 		//不为null
  19.         if (uss != null) {
  20.             uss.mUnlockProgress.addListener(listener);
  21.             uss.tokenProvided = (token != null);
  22.         }
  23.     }
  24.     // Bail if user isn't actually running
  25.     if (uss == null) {
  26.         notifyFinished(userId, listener);
  27.         return false;
  28.     }
  29. 	 //完成解锁
  30.     finishUserUnlocking(uss);
  31.     int[] userIds;
  32.     synchronized (mLock) {
  33.         userIds = new int[mStartedUsers.size()];
  34.         for (int i = 0; i < userIds.length; i++) {
  35.             userIds[i] = mStartedUsers.keyAt(i);
  36.         }
  37.     }
  38. 	//解锁其他的用户
  39.     for (int testUserId : userIds) {
  40.         final UserInfo parent = mInjector.getUserManager().getProfileParent(testUserId);
  41. 		//parent= null
  42.         if (parent != null && parent.id == userId && testUserId != userId) {
  43.             maybeUnlockUser(testUserId);
  44.         }
  45.     }
  46.     return true;
  47. }
复制

上面比较关心的是finishUserUnlocking()

finishUserUnlocking()
biumall.com
  1. private void finishUserUnlocking(final UserState uss) {
  2.     final int userId = uss.mHandle.getIdentifier();
  3.     if (!StorageManager.isUserKeyUnlocked(userId)) return;
  4. 	synchronized (mLock) {
  5.         if (mStartedUsers.get(userId) != uss || uss.state != STATE_RUNNING_LOCKED) {
  6.             return;
  7.         }
  8.     }
  9.     uss.mUnlockProgress.start();
  10.     // 设置进度
  11.     uss.mUnlockProgress.setProgress(5,
  12.                 mInjector.getContext().getString(R.string.android_start_title));
  13.     // Call onBeforeUnlockUser on a worker thread that allows disk I/O
  14.     FgThread.getHandler().post(() -> {
  15. 		//isUserKeyUnlocked()=true
  16.         if (!StorageManager.isUserKeyUnlocked(userId)) {
  17.             return;
  18.         }
  19.         mInjector.getUserManager().onBeforeUnlockUser(userId);
  20.         synchronized (mLock) {
  21.             if (!uss.setState(STATE_RUNNING_LOCKED, STATE_RUNNING_UNLOCKING)) {
  22.                 return;
  23.             }
  24.         }
  25.         mInjector.getUserManagerInternal().setUserState(userId, uss.state);
  26. 		// 设置进度
  27.         uss.mUnlockProgress.setProgress(20);
  28. 		//通知系统服务解锁完成
  29.         mHandler.obtainMessage(SYSTEM_USER_UNLOCK_MSG, userId, 0, uss)
  30.                 .sendToTarget();
  31.     });
  32. }
复制

Handler发送了SYSTEM_USER_UNLOCK_MSG。

handleMessage()
biumall.com
  1. case SYSTEM_USER_UNLOCK_MSG:
  2.     final int userId = msg.arg1;
  3.     mInjector.getSystemServiceManager().unlockUser(userId);
  4.     // Loads recents on a worker thread that allows disk I/O
  5.     FgThread.getHandler().post(() -> {
  6.         mInjector.loadUserRecents(userId);
  7.     });
  8.     //完成用户解锁
  9.     finishUserUnlocked((UserState) msg.obj);
  10.     break;
复制
finishUserUnlocked()

显示几个用户状态

biumall.com
  1.     public final static int STATE_BOOTING = 0;
  2.     // User is in the locked state.
  3.     public final static int STATE_RUNNING_LOCKED = 1;
  4.     // User is in the unlocking state.
  5.     public final static int STATE_RUNNING_UNLOCKING = 2;
  6.     // User is in the running state.
  7.     public final static int STATE_RUNNING_UNLOCKED = 3;
  8.     // User is in the initial process of being stopped.
  9.     public final static int STATE_STOPPING = 4;
  10.     // User is in the final phase of stopping, sending Intent.ACTION_SHUTDOWN.
  11.     public final static int STATE_SHUTDOWN = 5;
复制
biumall.com
  1. void finishUserUnlocked(final UserState uss) {
  2.     final int userId = uss.mHandle.getIdentifier();
  3.     //没有解锁返回
  4.     if (!StorageManager.isUserKeyUnlocked(userId)) return;
  5.     synchronized (mLock) {
  6.         // Bail if we ended up with a stale user
  7.         if (mStartedUsers.get(uss.mHandle.getIdentifier()) != uss) return;
  8.         // Do not proceed if unexpected state
  9.         if (!uss.setState(STATE_RUNNING_UNLOCKING, STATE_RUNNING_UNLOCKED)) {
  10.             return;
  11.         }
  12.     }
  13. 	 //解锁完成
  14.     mInjector.getUserManagerInternal().setUserState(userId, uss.state);
  15.     uss.mUnlockProgress.finish();
  16.  
  17. 	//发送ACTION_USER_UNLOCKED广播
  18.     final Intent unlockedIntent = new Intent(Intent.ACTION_USER_UNLOCKED);
  19.     unlockedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId);
  20.     unlockedIntent.addFlags(
  21.             Intent.FLAG_RECEIVER_REGISTERED_ONLY | Intent.FLAG_RECEIVER_FOREGROUND);
  22.     mInjector.broadcastIntent(unlockedIntent, null, null, 0, null,
  23.             null, null, AppOpsManager.OP_NONE, null, false, false, MY_PID, SYSTEM_UID,
  24.             userId);
  25.     //略
  26.  
  27. 	//info.lastLoggedInFingerprint, Build.FINGERPRINT相等，取反就不满足条件，走else
  28.     if (!Objects.equals(info.lastLoggedInFingerprint, Build.FINGERPRINT)) {
  29.         final boolean quiet;
  30.         if (info.isManagedProfile()) {
  31.             quiet = !uss.tokenProvided
  32.                     || !mLockPatternUtils.isSeparateProfileChallengeEnabled(userId);
  33.         } else {
  34.             quiet = false;
  35.         }
  36.         mInjector.sendPreBootBroadcast(userId, quiet,
  37.                 () -> finishUserUnlockedCompleted(uss));
  38.     } else {
  39.     	//进入这里
  40.         finishUserUnlockedCompleted(uss);
  41.     }
  42. }
复制

这里最重要的一个点，发送了ACTION_USER_UNLOCKED。

也就是这里才会有ACTION_USER_UNLOCKED广播发送。

继续看finishUserUnlockedCompleted()

finishUserUnlockedCompleted()
biumall.com
  1. private void finishUserUnlockedCompleted(UserState uss) {
  2.     final int userId = uss.mHandle.getIdentifier();
  3.     synchronized (mLock) {
  4.         if (mStartedUsers.get(uss.mHandle.getIdentifier()) != uss) return;
  5.     }
  6.     UserInfo userInfo = getUserInfo(userId);
  7.     if (userInfo == null) {
  8.         return;
  9.     }
  10.     // Only keep marching forward if user is actually unlocked
  11.     if (!StorageManager.isUserKeyUnlocked(userId)) return;
  12.     // Remember that we logged in
  13.     mInjector.getUserManager().onUserLoggedIn(userId);
  14. 	//userInfo.isInitialized() = true，不进入
  15.     if (!userInfo.isInitialized()) {
  16.         if (userId != UserHandle.USER_SYSTEM) {
  17. 			//发送ACTION_USER_INITIALIZE广播去给user初始化
  18.             Intent intent = new Intent(Intent.ACTION_USER_INITIALIZE);
  19.             intent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND
  20.                     | Intent.FLAG_RECEIVER_INCLUDE_BACKGROUND);
  21.             mInjector.broadcastIntent(intent, null,
  22.                     new IIntentReceiver.Stub() {
  23.                         @Override
  24.                         public void performReceive(Intent intent, int resultCode,
  25.                                 String data, Bundle extras, boolean ordered,
  26.                                 boolean sticky, int sendingUser) {
  27.                             // Note: performReceive is called with mService lock held
  28.                             mInjector.getUserManager().makeInitialized(userInfo.id);
  29.                         }
  30.                     }, 0, null, null, null, AppOpsManager.OP_NONE,
  31.                     null, true, false, MY_PID, SYSTEM_UID, userId);
  32.         }
  33.     }
  34.     // Do not report secondary users, runtime restarts or first boot/upgrade
  35. 	//userId = 0
  36.     if (userId == UserHandle.USER_SYSTEM
  37.             && !mInjector.isRuntimeRestarted() && !mInjector.isFirstBootOrUpgrade()) {
  38.         int uptimeSeconds = (int) (SystemClock.elapsedRealtime() / 1000);
  39.         MetricsLogger.histogram(mInjector.getContext(), "framework_boot_completed",
  40.                 uptimeSeconds);
  41.     }
  42. 	 //发送ACTION_BOOT_COMPLETED广播
  43.     final Intent bootIntent = new Intent(Intent.ACTION_BOOT_COMPLETED, null);
  44.     bootIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId);
  45.     bootIntent.addFlags(Intent.FLAG_RECEIVER_NO_ABORT
  46.             | Intent.FLAG_RECEIVER_INCLUDE_BACKGROUND);
  47.     mInjector.broadcastIntent(bootIntent, null, new IIntentReceiver.Stub() {
  48.                 @Override
  49.                 public void performReceive(Intent intent, int resultCode, String data,
  50.                         Bundle extras, boolean ordered, boolean sticky, int sendingUser)
  51.                         throws RemoteException {
  52.                     Slog.i(UserController.TAG, "Finished processing BOOT_COMPLETED for u" + userId);
  53.                 }
  54.             }, 0, null, null,
  55.             new String[]{android.Manifest.permission.RECEIVE_BOOT_COMPLETED},
  56.             AppOpsManager.OP_NONE, null, true, false, MY_PID, SYSTEM_UID, userId);
  57.  
  58.     if (!SystemProperties.get("vendor.android.home.ready").equals("1")) {
  59.         SystemProperties.set("vendor.android.home.ready", "1");
  60.     }
  61.  
  62.     Timer timer = new Timer();
  63.     timer.schedule(new TimerTask() {
  64.         @Override
  65.         public void run() {
  66.             final Intent readyIntent = new Intent(Intent.ACTION_HOME_READY, null);
  67.             readyIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId);
  68.             readyIntent.addFlags(Intent.FLAG_RECEIVER_NO_ABORT | Intent.FLAG_RECEIVER_INCLUDE_BACKGROUND);
  69.             mInjector.broadcastIntent(readyIntent, null, new IIntentReceiver.Stub() {
  70.                 @Override
  71.                 public void performReceive(Intent intent, int resultCode, String data,
  72.                     Bundle extras, boolean ordered, boolean sticky, int sendingUser)
  73.                     throws RemoteException {
  74.                         Slog.i(UserController.TAG, "Finished processing HOME_READY for u" + userId);
  75.                     }
  76.             }, 0, null, null,
  77.             new String[]{android.Manifest.permission.RECEIVE_BOOT_COMPLETED},
  78.             AppOpsManager.OP_NONE, null, true, false, MY_PID, SYSTEM_UID, userId);
  79.         }
  80.     }, 1000); // Delay 1s
  81. }
复制

这里会发送ACTION_BOOT_COMPLETED，至此，才算真正的开机成功。

参考文章

  1. 《Android输入法IMMS服务启动流程(5)(onUnlockUser过程)》

  2. 《Android开机动画关闭源码分析》

  3. 《StorageManagerService的启动》

 历史文章

  1. 《ExoPlayer+PlayerView播放部分视频出现绿条屏》
  2. 《ACTION_USER_UNLOCKED发送分析》
  3. 《Android开启Wifi debug调试》
  4. 《Maven Repository》
  5. 《朱自清：神奇的丝瓜》
  6. 《ListView的使用简介》
  7. 《麦芒：今夜的火花今夜就会熄灭》
  8. 《老舍：春风》
  9. 《痛并快乐着》
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