7.2.2 通知信息的管理与显示
根据用户是否拉下，通知信息表现为一个位于状态栏的图标，或者下拉的条目。通知信息发出声音，提醒用户。信息可以表示一条事件，新的短信，来电，或持续在后台的工作，下载的文件等
1 通知信息的发送
public void notify(int id, Notification notification)
{
notify(null, id, notification);
}
public void notify(String tag, int id, Notification notification)
{
notifyAsUser(tag, id, notification, mContext.getUser());
}
public void notifyAsUser(String tag, int id, Notification notification, UserHandle user)
{
//1 获取NotificationManagerService的Bp端代理
INotificationManager service = getService();
//2 获取信息发送者的包名
String pkg = mContext.getPackageName();
// Fix the notification as best we can.
Notification.addFieldsFromContext(mContext, notification);
if (notification.sound != null) {
notification.sound = notification.sound.getCanonicalUri();
if (StrictMode.vmFileUriExposureEnabled()) {
notification.sound.checkFileUriExposed("Notification.sound");
}
}
fixLegacySmallIcon(notification, pkg);
if (mContext.getApplicationInfo().targetSdkVersion > Build.VERSION_CODES.LOLLIPOP_MR1) {
if (notification.getSmallIcon() == null) {
throw new IllegalArgumentException("Invalid notification (no valid small icon): "
+ notification);
}
}
if (localLOGV) Log.v(TAG, pkg + ": notify(" + id + ", " + notification + ")");
notification.reduceImageSizes(mContext);
ActivityManager am = (ActivityManager) mContext.getSystemService(Context.ACTIVITY_SERVICE);
boolean isLowRam = am.isLowRamDevice();
final Notification copy = Builder.maybeCloneStrippedForDelivery(notification, isLowRam,
mContext);
try {
//3 将包名 tag id 提交给NotificationManagerService
service.enqueueNotificationWithTag(pkg, mContext.getOpPackageName(), tag, id,
copy, user.getIdentifier());
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
2 NotificationManagerService中的通知信息
@Override
public void enqueueNotificationWithTag(String pkg, String opPkg, String tag, int id,
Notification notification, int userId) throws RemoteException {
enqueueNotificationInternal(pkg, opPkg, Binder.getCallingUid(),
Binder.getCallingPid(), tag, id, notification, userId);
}
void enqueueNotificationInternal(final String pkg, final String opPkg, final int callingUid,
final int callingPid, final String tag, final int id, final Notification notification,
int incomingUserId) {
if (DBG) {
Slog.v(TAG, "enqueueNotificationInternal: pkg=" + pkg + " id=" + id
+ " notification=" + notification);
}
//1 首先安全检查
checkCallerIsSystemOrSameApp(pkg);
final int userId = ActivityManager.handleIncomingUser(callingPid,
callingUid, incomingUserId, true, false, "enqueueNotification", pkg);
final UserHandle user = new UserHandle(userId);
if (pkg == null || notification == null) {
throw new IllegalArgumentException("null not allowed: pkg=" + pkg
+ " id=" + id + " notification=" + notification);
}
// The system can post notifications for any package, let us resolve that.
final int notificationUid = resolveNotificationUid(opPkg, callingUid, userId);
// Fix the notification as best we can.
try {
final ApplicationInfo ai = mPackageManagerClient.getApplicationInfoAsUser(
pkg, PackageManager.MATCH_DEBUG_TRIAGED_MISSING,
(userId == UserHandle.USER_ALL) ? USER_SYSTEM : userId);
Notification.addFieldsFromContext(ai, notification);
int canColorize = mPackageManagerClient.checkPermission(
android.Manifest.permission.USE_COLORIZED_NOTIFICATIONS, pkg);
if (canColorize == PERMISSION_GRANTED) {
notification.flags |= Notification.FLAG_CAN_COLORIZE;
} else {
notification.flags &= ~Notification.FLAG_CAN_COLORIZE;
}
} catch (NameNotFoundException e) {
Slog.e(TAG, "Cannot create a context for sending app", e);
return;
}
mUsageStats.registerEnqueuedByApp(pkg);
// setup local book-keeping
String channelId = notification.getChannelId();
if (mIsTelevision && (new Notification.TvExtender(notification)).getChannelId() != null) {
channelId = (new Notification.TvExtender(notification)).getChannelId();
}
final NotificationChannel channel = mRankingHelper.getNotificationChannel(pkg,
notificationUid, channelId, false /* includeDeleted */);
if (channel == null) {
final String noChannelStr = "No Channel found for "
+ "pkg=" + pkg
+ ", channelId=" + channelId
+ ", id=" + id
+ ", tag=" + tag
+ ", opPkg=" + opPkg
+ ", callingUid=" + callingUid
+ ", userId=" + userId
+ ", incomingUserId=" + incomingUserId
+ ", notificationUid=" + notificationUid
+ ", notification=" + notification;
Log.e(TAG, noChannelStr);
boolean appNotificationsOff = mRankingHelper.getImportance(pkg, notificationUid)
== NotificationManager.IMPORTANCE_NONE;
if (!appNotificationsOff) {
doChannelWarningToast("Developer warning for package \"" + pkg + "\"\n" +
"Failed to post notification on channel \"" + channelId + "\"\n" +
"See log for more details");
}
return;
}
final StatusBarNotification n = new StatusBarNotification(
pkg, opPkg, id, tag, notificationUid, callingPid, notification,
user, null, System.currentTimeMillis());
//3 创建NotificationRecord包装所有与此通知相关的信息
final NotificationRecord r = new NotificationRecord(getContext(), n, channel);
r.setIsAppImportanceLocked(mRankingHelper.getIsAppImportanceLocked(pkg, callingUid));
if ((notification.flags & Notification.FLAG_FOREGROUND_SERVICE) != 0) {
final boolean fgServiceShown = channel.isFgServiceShown();
if (((channel.getUserLockedFields() & NotificationChannel.USER_LOCKED_IMPORTANCE) == 0
|| !fgServiceShown)
&& (r.getImportance() == IMPORTANCE_MIN
|| r.getImportance() == IMPORTANCE_NONE)) {
// Increase the importance of foreground service notifications unless the user had
// an opinion otherwise (and the channel hasn't yet shown a fg service).
if (TextUtils.isEmpty(channelId)
|| NotificationChannel.DEFAULT_CHANNEL_ID.equals(channelId)) {
r.setImportance(IMPORTANCE_LOW, "Bumped for foreground service");
} else {
channel.setImportance(IMPORTANCE_LOW);
if (!fgServiceShown) {
channel.unlockFields(NotificationChannel.USER_LOCKED_IMPORTANCE);
channel.setFgServiceShown(true);
}
mRankingHelper.updateNotificationChannel(pkg, notificationUid, channel, false);
r.updateNotificationChannel(channel);
}
} else if (!fgServiceShown && !TextUtils.isEmpty(channelId)
&& !NotificationChannel.DEFAULT_CHANNEL_ID.equals(channelId)) {
channel.setFgServiceShown(true);
r.updateNotificationChannel(channel);
}
}
if (!checkDisqualifyingFeatures(userId, notificationUid, id, tag, r,
r.sbn.getOverrideGroupKey() != null)) {
return;
}
// Whitelist pending intents.
if (notification.allPendingIntents != null) {
final int intentCount = notification.allPendingIntents.size();
if (intentCount > 0) {
final ActivityManagerInternal am = LocalServices
.getService(ActivityManagerInternal.class);
final long duration = LocalServices.getService(
DeviceIdleController.LocalService.class).getNotificationWhitelistDuration();
for (int i = 0; i < intentCount; i++) {
PendingIntent pendingIntent = notification.allPendingIntents.valueAt(i);
if (pendingIntent != null) {
am.setPendingIntentWhitelistDuration(pendingIntent.getTarget(),
WHITELIST_TOKEN, duration);
}
}
}
}
mHandler.post(new EnqueueNotificationRunnable(userId, r));
}
3 StatusBarManagerService中通知信息
通知信息由NotificationManagerService封装为StatusBarNotification并通过StatusBarManagerService.addNotification() 传递给StatusBarManagerService
4 状态栏中的通知信息
7.2.3 系统状态图标区的管理与显示
StatusBarManagerService维护了一个准许显示在系统状态区的预定义的意图列表，这个列表由fameworks/base/core/res/res/values/config.xml中的字符串数组config_statusBarIcons定义。StatusBarManagerService会拒绝使用者提交上述预定义之外的图标。
1 在系统状态图标区显示图标的方法
在系统状态区中显示一个图标使用StatusBarManager.setIcon()
public void setIcon(String slot, int iconId, int iconLevel, String contentDescription) {
try {
final IStatusBarService svc = getService();
if (svc != null) {
svc.setIcon(slot, mContext.getPackageName(), iconId, iconLevel,
contentDescription);
}
} catch (RemoteException ex) {
throw ex.rethrowFromSystemServer();
}
}
2 StatusBarManagerService对系统状态图标的管理
@Override
public void setIcon(String slot, String iconPackage, int iconId, int iconLevel,
String contentDescription) {
//1 首先是安全性检查 设置者必须有android.permission.STATUS_BAR才能设置系统状态图标
enforceStatusBar();
synchronized (mIcons) {
//3 创建一个StatusBarIcon，用于封装与图标相关的信息
StatusBarIcon icon = new StatusBarIcon(iconPackage, UserHandle.SYSTEM, iconId,
iconLevel, 0, contentDescription);
//Slog.d(TAG, "setIcon slot=" + slot + " index=" + index + " icon=" + icon);
//4 将新的StatusBarIcon 保存到mIcons中
mIcons.put(slot, icon);
if (mBar != null) {
try {
//5 将新的StatusBarIcon提交给SystemUI中的状态栏
mBar.setIcon(slot, icon);
} catch (RemoteException ex) {
}
}
}
}
mIcons是StatusBarIconList类的实例，用于保存系统图标的列表。
config_statusBarIcons 保存系统图标列表
public StatusBarIconControllerImpl(Context context) {
super(context.getResources().getStringArray(
com.android.internal.R.array.config_statusBarIcons));
Dependency.get(ConfigurationController.class).addCallback(this);
mContext = context;
loadDimens();
SysUiServiceProvider.getComponent(context, CommandQueue.class)
.addCallbacks(this);
Dependency.get(TunerService.class).addTunable(this, ICON_BLACKLIST);
}
继承
public StatusBarIconList(String[] slots) {
final int N = slots.length;
for (int i=0; i < N; i++) {
mSlots.add(new Slot(slots[i], null));
}
}
3 在状态栏的系统图标区显示图标
SystemUI的CommandQueue. CommandQueue中与StatusBarManagerService一样保存了一个StatusBarIconList的实例mList。CommandQueue会检查给定的意图在mList中是否存在一个StatusBarIcon。不存在时会通过调用StatusBar.addIcon()添加一个图标
4 系统状态图标的主要设置者 PhoneStatusBarPolicy
在StatusBar.start()中被创建
mIconPolicy = new PhoneStatusBarPolicy(mContext, mIconController);
PhoneStatusBarPolicy工作原理与NetworkController/BatteryController组件一样，通过监听系统状态相关的广播，在广播来时调用StatusBarManager.setIcon()修改系统状态图标
filter.addAction(AudioManager.RINGER_MODE_CHANGED_ACTION);
filter.addAction(AudioManager.INTERNAL_RINGER_MODE_CHANGED_ACTION);
filter.addAction(AudioManager.ACTION_HEADSET_PLUG);
filter.addAction(TelephonyIntents.ACTION_SIM_STATE_CHANGED);
filter.addAction(TelecomManager.ACTION_CURRENT_TTY_MODE_CHANGED);
filter.addAction(Intent.ACTION_MANAGED_PROFILE_AVAILABLE);
filter.addAction(Intent.ACTION_MANAGED_PROFILE_UNAVAILABLE);
filter.addAction(Intent.ACTION_MANAGED_PROFILE_REMOVED);
根据接收的广播调用对应方法
updateTTY();
updateBluetooth();
扩充预定义的图标列表
frameworks/base/core/res/res/values/config.xml config_statusBarIcons
锁屏
时序图
https://blog.youkuaiyun.com/f2006116/article/details/82459134
按下电源键、屏幕显示时间超时、解锁（滑动 图案 指纹 声音 人脸 虹膜）、屏下显示通知管理者
启动锁屏
public class KeyguardViewMediator extends SystemUI {}
@Override
public void start() {
synchronized (this) {
setupLocked();
}
putComponent(KeyguardViewMediator.class, this);
}
private void setupLocked() {
mPM = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);
mTrustManager = (TrustManager) mContext.getSystemService(Context.TRUST_SERVICE);
// 创建PARTIAL_WAKE_LOCK
mShowKeyguardWakeLock = mPM.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "show keyguard");
// 设置WakeLock为不计数机制
mShowKeyguardWakeLock.setReferenceCounted(false);
IntentFilter filter = new IntentFilter();
// 关机广播
filter.addAction(Intent.ACTION_SHUTDOWN);
mContext.registerReceiver(mBroadcastReceiver, filter);
final IntentFilter delayedActionFilter = new IntentFilter();
delayedActionFilter.addAction(DELAYED_KEYGUARD_ACTION);
delayedActionFilter.addAction(DELAYED_LOCK_PROFILE_ACTION);
mContext.registerReceiver(mDelayedLockBroadcastReceiver, delayedActionFilter,
SYSTEMUI_PERMISSION, null /* scheduler */);
mKeyguardDisplayManager = new KeyguardDisplayManager(mContext, mViewMediatorCallback);
mAlarmManager = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);
mUpdateMonitor = KeyguardUpdateMonitor.getInstance(mContext);
mLockPatternUtils = new LockPatternUtils(mContext);
KeyguardUpdateMonitor.setCurrentUser(ActivityManager.getCurrentUser());
// Assume keyguard is showing (unless it's disabled) until we know for sure, unless Keyguard
// is disabled.
if (mContext.getResources().getBoolean(
com.android.keyguard.R.bool.config_enableKeyguardService)) {
setShowingLocked(!shouldWaitForProvisioning()
&& !mLockPatternUtils.isLockScreenDisabled(
KeyguardUpdateMonitor.getCurrentUser()),
mAodShowing, mSecondaryDisplayShowing, true /* forceCallbacks */);
} else {
// The system's keyguard is disabled or missing.
setShowingLocked(false, mAodShowing, mSecondaryDisplayShowing, true);
}
//statusbar 和keyguard关联
mStatusBarKeyguardViewManager =
SystemUIFactory.getInstance().createStatusBarKeyguardViewManager(mContext,
mViewMediatorCallback, mLockPatternUtils);
final ContentResolver cr = mContext.getContentResolver();
//获取设备可交互状态
mDeviceInteractive = mPM.isInteractive();
//加载锁屏解锁音频和音量
mLockSounds = new SoundPool(1, AudioManager.STREAM_SYSTEM, 0);
String soundPath = Settings.Global.getString(cr, Settings.Global.LOCK_SOUND);
if (soundPath != null) {
mLockSoundId = mLockSounds.load(soundPath, 1);
}
if (soundPath == null || mLockSoundId == 0) {
Log.w(TAG, "failed to load lock sound from " + soundPath);
}
soundPath = Settings.Global.getString(cr, Settings.Global.UNLOCK_SOUND);
if (soundPath != null) {
mUnlockSoundId = mLockSounds.load(soundPath, 1);
}
if (soundPath == null || mUnlockSoundId == 0) {
Log.w(TAG, "failed to load unlock sound from " + soundPath);
}
soundPath = Settings.Global.getString(cr, Settings.Global.TRUSTED_SOUND);
if (soundPath != null) {
mTrustedSoundId = mLockSounds.load(soundPath, 1);
}
if (soundPath == null || mTrustedSoundId == 0) {
Log.w(TAG, "failed to load trusted sound from " + soundPath);
}
int lockSoundDefaultAttenuation = mContext.getResources().getInteger(
com.android.internal.R.integer.config_lockSoundVolumeDb);
mLockSoundVolume = (float)Math.pow(10, (float)lockSoundDefaultAttenuation/20);
//加载动画
mHideAnimation = AnimationUtils.loadAnimation(mContext,
com.android.internal.R.anim.lock_screen_behind_enter);
mWorkLockController = new WorkLockActivityController(mContext);
}
android developer文档关于WakeLock的解释
WakeLock计数机制（setReferenceCounted）：
在创建了PowerManager.WakeLock 后，有两种机制，第一种是不计数锁机制，另一种是计数锁机制。这可以通过setReferenceCounted( boolean value) 来指定，默认为计数机制。这两种机制的区别在于，前者无论acquire() 了多少次，只要通过一次release() 即可解锁。而后者正真解锁是在（--count == 0 ）的时候，同样当（count == 0） 的时候才会去申请加锁，其他情况下isHeld 状态是不会改变的。所以PowerManager.WakeLock 的计数机制并不是正真意义上的对每次请求进行申请／释放每一把锁，它只是对同一把锁被申请／释放的次数进行了统计。
KeyguardService的启动
public class KeyguardService extends Service {}
frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java
@Override
public void systemBooted() {
bindKeyguard();
synchronized (mLock) {
mSystemBooted = true;
if (mSystemReady) {
mKeyguardDelegate.onBootCompleted();
}
}
startedWakingUp();
screenTurningOn(null);
screenTurnedOn();
}
private void bindKeyguard() {
synchronized (mLock) {
if (mKeyguardBound) {
return;
}
mKeyguardBound = true;
}
mKeyguardDelegate.bindService(mContext);
}
frameworks/base/services/core/java/com/android/server/policy/keyguard/KeyguardServiceDelegate.java
public void bindService(Context context) {
Intent intent = new Intent();
final Resources resources = context.getApplicationContext().getResources();
final ComponentName keyguardComponent = ComponentName.unflattenFromString(
resources.getString(com.android.internal.R.string.config_keyguardComponent));
intent.addFlags(Intent.FLAG_DEBUG_TRIAGED_MISSING);
intent.setComponent(keyguardComponent);
if (!context.bindServiceAsUser(intent, mKeyguardConnection,
Context.BIND_AUTO_CREATE, mHandler, UserHandle.SYSTEM)) {
Log.v(TAG, "*** Keyguard: can't bind to " + keyguardComponent);
mKeyguardState.showing = false;
mKeyguardState.showingAndNotOccluded = false;
mKeyguardState.secure = false;
synchronized (mKeyguardState) {
// TODO: Fix synchronisation model in this class. The other state in this class
// is at least self-healing but a race condition here can lead to the scrim being
// stuck on keyguard-less devices.
mKeyguardState.deviceHasKeyguard = false;
}
} else {
if (DEBUG) Log.v(TAG, "*** Keyguard started");
}
}
private final ServiceConnection mKeyguardConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
if (DEBUG) Log.v(TAG, "*** Keyguard connected (yay!)");
//KeyguardServiceWrapper 为KeyguardService的包装类
mKeyguardService = new KeyguardServiceWrapper(mContext,
IKeyguardService.Stub.asInterface(service), mCallback);
if (mKeyguardState.systemIsReady) {
// If the system is ready, it means keyguard crashed and restarted.
mKeyguardService.onSystemReady();
if (mKeyguardState.currentUser != UserHandle.USER_NULL) {
// There has been a user switch earlier
mKeyguardService.setCurrentUser(mKeyguardState.currentUser);
}
// This is used to hide the scrim once keyguard displays.
if (mKeyguardState.interactiveState == INTERACTIVE_STATE_AWAKE
|| mKeyguardState.interactiveState == INTERACTIVE_STATE_WAKING) {
mKeyguardService.onStartedWakingUp();
}
if (mKeyguardState.interactiveState == INTERACTIVE_STATE_AWAKE) {
mKeyguardService.onFinishedWakingUp();
}
if (mKeyguardState.screenState == SCREEN_STATE_ON
|| mKeyguardState.screenState == SCREEN_STATE_TURNING_ON) {
mKeyguardService.onScreenTurningOn(
new KeyguardShowDelegate(mDrawnListenerWhenConnect));
}
if (mKeyguardState.screenState == SCREEN_STATE_ON) {
mKeyguardService.onScreenTurnedOn();
}
mDrawnListenerWhenConnect = null;
}
if (mKeyguardState.bootCompleted) {
mKeyguardService.onBootCompleted();
}
if (mKeyguardState.occluded) {
mKeyguardService.setOccluded(mKeyguardState.occluded, false /* animate */);
}
if (!mKeyguardState.enabled) {
mKeyguardService.setKeyguardEnabled(mKeyguardState.enabled);
}
}
@Override
public void onServiceDisconnected(ComponentName name) {
if (DEBUG) Log.v(TAG, "*** Keyguard disconnected (boo!)");
mKeyguardService = null;
mKeyguardState.reset();
mHandler.post(() -> {
try {
// There are no longer any keyguard windows on secondary displays, so pass
// INVALID_DISPLAY. All that means is that showWhenLocked activities on
// secondary displays now get to show.
ActivityManager.getService().setLockScreenShown(true /* keyguardShowing */,
false /* aodShowing */, INVALID_DISPLAY);
} catch (RemoteException e) {
// Local call.
}
});
}
};
绑定后，PhoneWindowManager可以调用代理类KeyguardServiceDelegate调用KeyguardService的方法进行锁屏相关状态回调
开机keyguard 显示锁流程：
系统启动完成后，PhoneWindowManager.systemReady()
@Override
public void systemReady() {
// In normal flow, systemReady is called before other system services are ready.
// So it is better not to bind keyguard here.
mKeyguardDelegate.onSystemReady();
mVrManagerInternal = LocalServices.getService(VrManagerInternal.class);
if (mVrManagerInternal != null) {
mVrManagerInternal.addPersistentVrModeStateListener(mPersistentVrModeListener);
}
readCameraLensCoverState();
updateUiMode();
synchronized (mLock) {
updateOrientationListenerLp();
mSystemReady = true;
mHandler.post(new Runnable() {
@Override
public void run() {
updateSettings();
}
});
// If this happens, for whatever reason, systemReady came later than systemBooted.
// And keyguard should be already bound from systemBooted
if (mSystemBooted) {
mKeyguardDelegate.onBootCompleted();
}
}
mSystemGestures.systemReady();
mImmersiveModeConfirmation.systemReady();
mAutofillManagerInternal = LocalServices.getService(AutofillManagerInternal.class);
}
mKeyguardDelegate.onSystemReady();
public void onSystemReady() {
if (mKeyguardService != null) {
mKeyguardService.onSystemReady();
} else {
mKeyguardState.systemIsReady = true;
}
}
KeyguardServiceWrapper.java
@Override // Binder interface
public void onSystemReady() {
try {
mService.onSystemReady();
} catch (RemoteException e) {
Slog.w(TAG , "Remote Exception", e);
}
}
KeyguardServic.java
@Override // Binder interface
public void onSystemReady() {
Trace.beginSection("KeyguardService.mBinder#onSystemReady");
checkPermission();
mKeyguardViewMediator.onSystemReady();
Trace.endSection();
}
KeyguardViewMediator.java
public void onSystemReady() {
mHandler.obtainMessage(SYSTEM_READY).sendToTarget();
}
case SYSTEM_READY:
handleSystemReady();
break;
private void handleSystemReady() {
synchronized (this) {
if (DEBUG) Log.d(TAG, "onSystemReady");
mSystemReady = true;
doKeyguardLocked(null);
mUpdateMonitor.registerCallback(mUpdateCallback);
}
// Most services aren't available until the system reaches the ready state, so we
// send it here when the device first boots.
maybeSendUserPresentBroadcast();
}
private void doKeyguardLocked(Bundle options) {
//判断是否为安全启动
if (KeyguardUpdateMonitor.CORE_APPS_ONLY) {
// Don't show keyguard during half-booted cryptkeeper stage.
if (DEBUG) Log.d(TAG, "doKeyguard: not showing because booting to cryptkeeper");
return;
}
...
showLocked(options);
}
private void showLocked(Bundle options) {
Trace.beginSection("KeyguardViewMediator#showLocked aqcuiring mShowKeyguardWakeLock");
if (DEBUG) Log.d(TAG, "showLocked");
// ensure we stay awake until we are finished displaying the keyguard
mShowKeyguardWakeLock.acquire();
Message msg = mHandler.obtainMessage(SHOW, options);
mHandler.sendMessage(msg);
Trace.endSection();
}
case SHOW:
handleShow((Bundle) msg.obj);
break;
private void handleShow(Bundle options) {
Trace.beginSection("KeyguardViewMediator#handleShow");
final int currentUser = KeyguardUpdateMonitor.getCurrentUser();
if (mLockPatternUtils.isSecure(currentUser)) {
mLockPatternUtils.getDevicePolicyManager().reportKeyguardSecured(currentUser);
}
synchronized (KeyguardViewMediator.this) {
if (!mSystemReady) {
if (DEBUG) Log.d(TAG, "ignoring handleShow because system is not ready.");
return;
} else {
if (DEBUG) Log.d(TAG, "handleShow");
}
setShowingLocked(true, mAodShowing);
//显示keyguard
mStatusBarKeyguardViewManager.show(options);
mHiding = false;
mWakeAndUnlocking = false;
resetKeyguardDonePendingLocked();
mHideAnimationRun = false;
adjustStatusBarLocked();
userActivity();
mShowKeyguardWakeLock.release();
}
mKeyguardDisplayManager.show();
Trace.endSection();
}
接着处理keyguard绘制逻辑，主要在StatusBarKeyguardViewManager中调用showBouncerOrKeyguard()去显示notification keyguard还是bouncer，在灭屏情况下，再次亮屏看到一般是notification keyguard，就是有消息通知、时间之类的view，上滑会显示密码解锁界面bouncer,接着会调用showkeyguard()，由于还未绘制内容，会进行keyguard的绘制
StatusBarKeyguardViewManager.java
public void show(Bundle options) {
mShowing = true;
mStatusBarWindowManager.setKeyguardShowing(true);
reset(true /* hideBouncerWhenShowing */);
StatsLog.write(StatsLog.KEYGUARD_STATE_CHANGED,
StatsLog.KEYGUARD_STATE_CHANGED__STATE__SHOWN);
}
public void reset(boolean hideBouncerWhenShowing) {
if (mShowing) {
if (mOccluded && !mDozing) {
mStatusBar.hideKeyguard();
if (hideBouncerWhenShowing || mBouncer.needsFullscreenBouncer()) {
hideBouncer(false /* destroyView */);
}
} else {
showBouncerOrKeyguard(hideBouncerWhenShowing);
}
KeyguardUpdateMonitor.getInstance(mContext).sendKeyguardReset();
updateStates();
}
}
protected void showBouncerOrKeyguard(boolean hideBouncerWhenShowing) {
if (mBouncer.needsFullscreenBouncer() && !mDozing) {
// The keyguard might be showing (already). So we need to hide it.
mStatusBar.hideKeyguard();
mBouncer.show(true /* resetSecuritySelection */);
} else {
mStatusBar.showKeyguard();
if (hideBouncerWhenShowing) {
hideBouncer(shouldDestroyViewOnReset() /* destroyView */);
mBouncer.prepare();
}
}
updateStates();
}
public void prepare() {
boolean wasInitialized = mRoot != null;
ensureView();
if (wasInitialized) {
mKeyguardView.showPrimarySecurityScreen();
}
mBouncerPromptReason = mCallback.getBouncerPromptReason();
}
public void showPrimarySecurityScreen() {
if (DEBUG) Log.d(TAG, "show()");
mSecurityContainer.showPrimarySecurityScreen(false);
}
void showPrimarySecurityScreen(boolean turningOff) {
SecurityMode securityMode = mSecurityModel.getSecurityMode(
KeyguardUpdateMonitor.getCurrentUser());
if (DEBUG) Log.v(TAG, "showPrimarySecurityScreen(turningOff=" + turningOff + ")");
showSecurityScreen(securityMode);
}
按power键，keyguard加载流程
在灭屏时加载，确保亮屏起来时，用户能第一时间看到解锁界面
PhoneWindowManager.java
@Override
public void finishedGoingToSleep(int why) {
EventLog.writeEvent(70000, 0);
if (DEBUG_WAKEUP) Slog.i(TAG, "Finished going to sleep... (why=" + why + ")");
MetricsLogger.histogram(mContext, "screen_timeout", mLockScreenTimeout / 1000);
mGoingToSleep = false;
mRequestedOrGoingToSleep = false;
// We must get this work done here because the power manager will drop
// the wake lock and let the system suspend once this function returns.
synchronized (mLock) {
mAwake = false;
updateWakeGestureListenerLp();
updateOrientationListenerLp();
updateLockScreenTimeout();
}
if (mKeyguardDelegate != null) {
mKeyguardDelegate.onFinishedGoingToSleep(why,
mCameraGestureTriggeredDuringGoingToSleep);
}
mCameraGestureTriggeredDuringGoingToSleep = false;
}
public void onFinishedGoingToSleep(int why, boolean cameraGestureTriggered) {
if (mKeyguardService != null) {
mKeyguardService.onFinishedGoingToSleep(why, cameraGestureTriggered);
}
mKeyguardState.interactiveState = INTERACTIVE_STATE_SLEEP;
}
@Override
public void onFinishedGoingToSleep(int reason, boolean cameraGestureTriggered) {
try {
mService.onFinishedGoingToSleep(reason, cameraGestureTriggered);
} catch (RemoteException e) {
Slog.w(TAG , "Remote Exception", e);
}
}
@Override // Binder interface
public void onFinishedGoingToSleep(int reason, boolean cameraGestureTriggered) {
checkPermission();
mKeyguardViewMediator.onFinishedGoingToSleep(reason, cameraGestureTriggered);
mKeyguardLifecyclesDispatcher.dispatch(
KeyguardLifecyclesDispatcher.FINISHED_GOING_TO_SLEEP);
}
public void onFinishedGoingToSleep(int why, boolean cameraGestureTriggered) {
if (DEBUG) Log.d(TAG, "onFinishedGoingToSleep(" + why + ")");
synchronized (this) {
mDeviceInteractive = false;
mGoingToSleep = false;
mWakeAndUnlocking = false;
resetKeyguardDonePendingLocked();
mHideAnimationRun = false;
notifyFinishedGoingToSleep();
if (cameraGestureTriggered) {
Log.i(TAG, "Camera gesture was triggered, preventing Keyguard locking.");
// Just to make sure, make sure the device is awake.
mContext.getSystemService(PowerManager.class).wakeUp(SystemClock.uptimeMillis(),
"com.android.systemui:CAMERA_GESTURE_PREVENT_LOCK");
mPendingLock = false;
mPendingReset = false;
}
if (mPendingReset) {
resetStateLocked();
mPendingReset = false;
}
if (mPendingLock) {
doKeyguardLocked(null);
mPendingLock = false;
}
// We do not have timeout and power button instant lock setting for profile lock.
// So we use the personal setting if there is any. But if there is no device
// we need to make sure we lock it immediately when the screen is off.
if (!mLockLater && !cameraGestureTriggered) {
doKeyguardForChildProfilesLocked();
}
}
KeyguardUpdateMonitor.getInstance(mContext).dispatchFinishedGoingToSleep(why);
}
private void notifyFinishedGoingToSleep() {
if (DEBUG) Log.d(TAG, "notifyFinishedGoingToSleep");
mHandler.sendEmptyMessage(NOTIFY_FINISHED_GOING_TO_SLEEP);
}
case NOTIFY_FINISHED_GOING_TO_SLEEP:
handleNotifyFinishedGoingToSleep();
private void handleNotifyFinishedGoingToSleep() {
synchronized (KeyguardViewMediator.this) {
if (DEBUG) Log.d(TAG, "handleNotifyFinishedGoingToSleep");
mStatusBarKeyguardViewManager.onFinishedGoingToSleep();
}
}
public void onFinishedGoingToSleep() {
mGoingToSleepVisibleNotOccluded = false;
mBouncer.onScreenTurnedOff();
}
public void onScreenTurnedOff() {
if (mKeyguardView != null && mRoot != null && mRoot.getVisibility() == View.VISIBLE) {
mKeyguardView.onPause();
}
}
public void onPause() {
if (DEBUG) Log.d(TAG, String.format("screen off, instance %s at %s",
Integer.toHexString(hashCode()), SystemClock.uptimeMillis()));
mSecurityContainer.showPrimarySecurityScreen(true);
mSecurityContainer.onPause();
clearFocus();
}
void showPrimarySecurityScreen(boolean turningOff) {
SecurityMode securityMode = mSecurityModel.getSecurityMode(
KeyguardUpdateMonitor.getCurrentUser());
if (DEBUG) Log.v(TAG, "showPrimarySecurityScreen(turningOff=" + turningOff + ")");
showSecurityScreen(securityMode);
}
private void showSecurityScreen(SecurityMode securityMode) {
if (DEBUG) Log.d(TAG, "showSecurityScreen(" + securityMode + ")");
if (securityMode == mCurrentSecuritySelection) return;
KeyguardSecurityView oldView = getSecurityView(mCurrentSecuritySelection);
KeyguardSecurityView newView = getSecurityView(securityMode);
// Emulate Activity life cycle
if (oldView != null) {
oldView.onPause();
oldView.setKeyguardCallback(mNullCallback); // ignore requests from old view
}
if (securityMode != SecurityMode.None) {
newView.onResume(KeyguardSecurityView.VIEW_REVEALED);
newView.setKeyguardCallback(mCallback);
}
// Find and show this child.
final int childCount = mSecurityViewFlipper.getChildCount();
final int securityViewIdForMode = getSecurityViewIdForMode(securityMode);
for (int i = 0; i < childCount; i++) {
if (mSecurityViewFlipper.getChildAt(i).getId() == securityViewIdForMode) {
mSecurityViewFlipper.setDisplayedChild(i);
break;
}
}
mCurrentSecuritySelection = securityMode;
mSecurityCallback.onSecurityModeChanged(securityMode,
securityMode != SecurityMode.None && newView.needsInput());
}
private KeyguardSecurityView getSecurityView(SecurityMode securityMode) {
final int securityViewIdForMode = getSecurityViewIdForMode(securityMode);
KeyguardSecurityView view = null;
final int children = mSecurityViewFlipper.getChildCount();
for (int child = 0; child < children; child++) {
if (mSecurityViewFlipper.getChildAt(child).getId() == securityViewIdForMode) {
view = ((KeyguardSecurityView)mSecurityViewFlipper.getChildAt(child));
break;
}
}
int layoutId = getLayoutIdFor(securityMode);
if (view == null && layoutId != 0) {
final LayoutInflater inflater = LayoutInflater.from(mContext);
if (DEBUG) Log.v(TAG, "inflating id = " + layoutId);
View v = inflater.inflate(layoutId, mSecurityViewFlipper, false);
mSecurityViewFlipper.addView(v);
updateSecurityView(v);
view = (KeyguardSecurityView)v;
}
return view;
}
doKeyguardLocked(null); 显示锁屏的流程
private void doKeyguardLocked(Bundle options) {
//判断是否为安全启动
if (KeyguardUpdateMonitor.CORE_APPS_ONLY) {
// Don't show keyguard during half-booted cryptkeeper stage.
if (DEBUG) Log.d(TAG, "doKeyguard: not showing because booting to cryptkeeper");
return;
}
// if another app is disabling us, don't show
if (!mExternallyEnabled) {
if (DEBUG) Log.d(TAG, "doKeyguard: not showing because externally disabled");
// note: we *should* set mNeedToReshowWhenReenabled=true here, but that makes
// for an occasional ugly flicker in this situation:
// 1) receive a call with the screen on (no keyguard) or make a call
// 2) screen times out
// 3) user hits key to turn screen back on
// instead, we reenable the keyguard when we know the screen is off and the call
// ends (see the broadcast receiver below)
// TODO: clean this up when we have better support at the window manager level
// for apps that wish to be on top of the keyguard
return;
}
// if the keyguard is already showing, don't bother
if (mStatusBarKeyguardViewManager.isShowing()) {
if (DEBUG) Log.d(TAG, "doKeyguard: not showing because it is already showing");
resetStateLocked();
return;
}
// In split system user mode, we never unlock system user.
if (!mustNotUnlockCurrentUser()
|| !mUpdateMonitor.isDeviceProvisioned()) {
// if the setup wizard hasn't run yet, don't show
final boolean requireSim = !SystemProperties.getBoolean("keyguard.no_require_sim", false);
final boolean absent = SubscriptionManager.isValidSubscriptionId(
mUpdateMonitor.getNextSubIdForState(ABSENT));
final boolean disabled = SubscriptionManager.isValidSubscriptionId(
mUpdateMonitor.getNextSubIdForState(IccCardConstants.State.PERM_DISABLED));
final boolean lockedOrMissing = mUpdateMonitor.isSimPinSecure()
|| ((absent || disabled) && requireSim);
if (!lockedOrMissing && shouldWaitForProvisioning()) {
if (DEBUG) Log.d(TAG, "doKeyguard: not showing because device isn't provisioned"
+ " and the sim is not locked or missing");
return;
}
boolean forceShow = options != null && options.getBoolean(OPTION_FORCE_SHOW, false);
if (mLockPatternUtils.isLockScreenDisabled(KeyguardUpdateMonitor.getCurrentUser())
&& !lockedOrMissing && !forceShow) {
if (DEBUG) Log.d(TAG, "doKeyguard: not showing because lockscreen is off");
return;
}
if (mLockPatternUtils.checkVoldPassword(KeyguardUpdateMonitor.getCurrentUser())) {
if (DEBUG) Log.d(TAG, "Not showing lock screen since just decrypted");
// Without this, settings is not enabled until the lock screen first appears
setShowingLocked(false, mAodShowing);
hideLocked();
return;
}
}
if (DEBUG) Log.d(TAG, "doKeyguard: showing the lock screen");
showLocked(options);
}
KeyguardUpdateMonitor.getInstance(mContext).dispatchFinishedGoingToSleep(why);
public void dispatchFinishedGoingToSleep(int why) {
synchronized(this) {
mDeviceInteractive = false;
}
mHandler.sendMessage(mHandler.obtainMessage(MSG_FINISHED_GOING_TO_SLEEP, why, 0));
}
case MSG_FINISHED_GOING_TO_SLEEP:
handleFinishedGoingToSleep(msg.arg1);
break;
protected void handleFinishedGoingToSleep(int arg1) {
mGoingToSleep = false;
final int count = mCallbacks.size();
for (int i = 0; i < count; i++) {
KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
if (cb != null) {
cb.onFinishedGoingToSleep(arg1);
}
}
updateFingerprintListeningState();
}
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