Broadcast源码解析

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注册广播

ContextImpl

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@Override
public Intent registerReceiver(BroadcastReceiver receiver, IntentFilter filter) {
    return registerReceiver(receiver, filter, null, null);
}

@Override
public Intent registerReceiver(BroadcastReceiver receiver, IntentFilter filter,
        String broadcastPermission, Handler scheduler) {
    return registerReceiverInternal(receiver, getUserId(),
            filter, broadcastPermission, scheduler, getOuterContext());
}


private Intent registerReceiverInternal(BroadcastReceiver receiver, int userId,
        IntentFilter filter, String broadcastPermission,
        Handler scheduler, Context context) {
    IIntentReceiver rd = null;
    if (receiver != null) {
        if (mPackageInfo != null && context != null) {
            if (scheduler == null) {
            		// 如果没指定广播接收在哪个线程的handler，就默认主线程的handler
                scheduler = mMainThread.getHandler();
            }
            rd = mPackageInfo.getReceiverDispatcher(
                receiver, context, scheduler,
                mMainThread.getInstrumentation(), true);
        } else {
            if (scheduler == null) {
                scheduler = mMainThread.getHandler();
            }
            rd = new LoadedApk.ReceiverDispatcher(
                    receiver, context, scheduler, null, true).getIIntentReceiver();
        }
    }
    try {
        return ActivityManagerNative.getDefault().registerReceiver(
                mMainThread.getApplicationThread(), mBasePackageName,
                rd, filter, broadcastPermission, userId);
    } catch (RemoteException e) {
        return null;
    }
}

LoadedApk

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public IIntentReceiver getReceiverDispatcher(BroadcastReceiver r,
        Context context, Handler handler,
        Instrumentation instrumentation, boolean registered) {
    synchronized (mReceivers) {
        LoadedApk.ReceiverDispatcher rd = null;
        ArrayMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher> map = null;
        if (registered) {
            map = mReceivers.get(context);
            if (map != null) {
                rd = map.get(r);
            }
        }
        if (rd == null) {
            rd = new ReceiverDispatcher(r, context, handler,
                    instrumentation, registered);
            if (registered) {
                if (map == null) {
                    map = new ArrayMap<BroadcastReceiver, LoadedApk.ReceiverDispatcher>();
                    mReceivers.put(context, map);
                }
                map.put(r, rd);
            }
        } else {
            rd.validate(context, handler);
        }
        rd.mForgotten = false;
        return rd.getIIntentReceiver();
    }
}

ReceiverDispatcher

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ReceiverDispatcher(BroadcastReceiver receiver, Context context,
        Handler activityThread, Instrumentation instrumentation,
        boolean registered) {
    if (activityThread == null) {
        throw new NullPointerException("Handler must not be null");
    }
	// 其实是个 binder 对象
    mIIntentReceiver = new InnerReceiver(this, !registered);
    mReceiver = receiver;
    mContext = context;
    mActivityThread = activityThread;
    mInstrumentation = instrumentation;
    mRegistered = registered;
    mLocation = new IntentReceiverLeaked(null);
    mLocation.fillInStackTrace();
}

ActivityManagerNative

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public Intent registerReceiver(IApplicationThread caller, String packageName,
        IIntentReceiver receiver,
        IntentFilter filter, String perm, int userId) throws RemoteException
{
    Parcel data = Parcel.obtain();
    Parcel reply = Parcel.obtain();
    data.writeInterfaceToken(IActivityManager.descriptor);
    data.writeStrongBinder(caller != null ? caller.asBinder() : null);
    data.writeString(packageName);
    data.writeStrongBinder(receiver != null ? receiver.asBinder() : null);
    filter.writeToParcel(data, 0);
    data.writeString(perm);
    data.writeInt(userId);
    mRemote.transact(REGISTER_RECEIVER_TRANSACTION, data, reply, 0);
    reply.readException();
    Intent intent = null;
    int haveIntent = reply.readInt();
    if (haveIntent != 0) {
        intent = Intent.CREATOR.createFromParcel(reply);
    }
    reply.recycle();
    data.recycle();
    return intent;
}

ActivityManagerService

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public Intent registerReceiver(IApplicationThread caller, String callerPackage,
        IIntentReceiver receiver, IntentFilter filter, String permission, int userId) {
    enforceNotIsolatedCaller("registerReceiver");
    ArrayList<Intent> stickyIntents = null;
    ProcessRecord callerApp = null;
    int callingUid;
    int callingPid;
    synchronized(this) {
        if (caller != null) {
            callerApp = getRecordForAppLocked(caller);
            if (callerApp == null) {
                throw new SecurityException(
                        "Unable to find app for caller " + caller
                        + " (pid=" + Binder.getCallingPid()
                        + ") when registering receiver " + receiver);
            }
            if (callerApp.info.uid != Process.SYSTEM_UID &&
                    !callerApp.pkgList.containsKey(callerPackage) &&
                    !"android".equals(callerPackage)) {
                throw new SecurityException("Given caller package " + callerPackage
                        + " is not running in process " + callerApp);
            }
            callingUid = callerApp.info.uid;
            callingPid = callerApp.pid;
        } else {
            callerPackage = null;
            callingUid = Binder.getCallingUid();
            callingPid = Binder.getCallingPid();
        }

        userId = handleIncomingUser(callingPid, callingUid, userId,
                true, ALLOW_FULL_ONLY, "registerReceiver", callerPackage);

        Iterator<String> actions = filter.actionsIterator();
        if (actions == null) {
            ArrayList<String> noAction = new ArrayList<String>(1);
            noAction.add(null);
            actions = noAction.iterator();
        }

        // Collect stickies of users
        int[] userIds = { UserHandle.USER_ALL, UserHandle.getUserId(callingUid) };
        while (actions.hasNext()) {
            String action = actions.next();
            for (int id : userIds) {
                ArrayMap<String, ArrayList<Intent>> stickies = mStickyBroadcasts.get(id);
                if (stickies != null) {
                    ArrayList<Intent> intents = stickies.get(action);
                    if (intents != null) {
                        if (stickyIntents == null) {
                            stickyIntents = new ArrayList<Intent>();
                        }
                        stickyIntents.addAll(intents);
                    }
                }
            }
        }
    }

    ArrayList<Intent> allSticky = null;
    if (stickyIntents != null) {
        final ContentResolver resolver = mContext.getContentResolver();
        // Look for any matching sticky broadcasts...
        for (int i = 0, N = stickyIntents.size(); i < N; i++) {
            Intent intent = stickyIntents.get(i);
            // If intent has scheme "content", it will need to acccess
            // provider that needs to lock mProviderMap in ActivityThread
            // and also it may need to wait application response, so we
            // cannot lock ActivityManagerService here.
            if (filter.match(resolver, intent, true, TAG) >= 0) {
                if (allSticky == null) {
                    allSticky = new ArrayList<Intent>();
                }
                allSticky.add(intent);
            }
        }
    }

    // The first sticky in the list is returned directly back to the client.
    Intent sticky = allSticky != null ? allSticky.get(0) : null;
    if (DEBUG_BROADCAST) Slog.v(TAG_BROADCAST, "Register receiver " + filter + ": " + sticky);
    if (receiver == null) {
        return sticky;
    }

    synchronized (this) {
        if (callerApp != null && (callerApp.thread == null
                || callerApp.thread.asBinder() != caller.asBinder())) {
            // Original caller already died
            return null;
        }
        ReceiverList rl = mRegisteredReceivers.get(receiver.asBinder());
        if (rl == null) {
            rl = new ReceiverList(this, callerApp, callingPid, callingUid,
                    userId, receiver);
            if (rl.app != null) {
                rl.app.receivers.add(rl);
            } else {
                try {
                    receiver.asBinder().linkToDeath(rl, 0);
                } catch (RemoteException e) {
                    return sticky;
                }
                rl.linkedToDeath = true;
            }
            mRegisteredReceivers.put(receiver.asBinder(), rl);
        } else if (rl.uid != callingUid) {
            throw new IllegalArgumentException(
                    "Receiver requested to register for uid " + callingUid
                    + " was previously registered for uid " + rl.uid);
        } else if (rl.pid != callingPid) {
            throw new IllegalArgumentException(
                    "Receiver requested to register for pid " + callingPid
                    + " was previously registered for pid " + rl.pid);
        } else if (rl.userId != userId) {
            throw new IllegalArgumentException(
                    "Receiver requested to register for user " + userId
                    + " was previously registered for user " + rl.userId);
        }
        BroadcastFilter bf = new BroadcastFilter(filter, rl, callerPackage,
                permission, callingUid, userId);
        rl.add(bf);
        if (!bf.debugCheck()) {
            Slog.w(TAG, "==> For Dynamic broadcast");
        }
        mReceiverResolver.addFilter(bf);

        // Enqueue broadcasts for all existing stickies that match
        // this filter.
        if (allSticky != null) {
            ArrayList receivers = new ArrayList();
            receivers.add(bf);

            final int stickyCount = allSticky.size();
            for (int i = 0; i < stickyCount; i++) {
                Intent intent = allSticky.get(i);
                BroadcastQueue queue = broadcastQueueForIntent(intent);
                BroadcastRecord r = new BroadcastRecord(queue, intent, null,
                        null, -1, -1, null, null, AppOpsManager.OP_NONE, null, receivers,
                        null, 0, null, null, false, true, true, -1);
                queue.enqueueParallelBroadcastLocked(r);
                queue.scheduleBroadcastsLocked();
            }
        }

        return sticky;
    }
}

发送广播

ContextImpl

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@Override
public void sendBroadcast(Intent intent) {
    warnIfCallingFromSystemProcess();
    String resolvedType = intent.resolveTypeIfNeeded(getContentResolver());
    try {
        intent.prepareToLeaveProcess();
        ActivityManagerNative.getDefault().broadcastIntent(
                mMainThread.getApplicationThread(), intent, resolvedType, null,
                Activity.RESULT_OK, null, null, null, AppOpsManager.OP_NONE, null, false, false,
                getUserId());
    } catch (RemoteException e) {
        throw new RuntimeException("Failure from system", e);
    }
}

ActivityManagerNative

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public int broadcastIntent(IApplicationThread caller,
        Intent intent, String resolvedType, IIntentReceiver resultTo,
        int resultCode, String resultData, Bundle map,
        String[] requiredPermissions, int appOp, Bundle options, boolean serialized,
        boolean sticky, int userId) throws RemoteException
{
    Parcel data = Parcel.obtain();
    Parcel reply = Parcel.obtain();
    data.writeInterfaceToken(IActivityManager.descriptor);
    data.writeStrongBinder(caller != null ? caller.asBinder() : null);
    intent.writeToParcel(data, 0);
    data.writeString(resolvedType);
    data.writeStrongBinder(resultTo != null ? resultTo.asBinder() : null);
    data.writeInt(resultCode);
    data.writeString(resultData);
    data.writeBundle(map);
    data.writeStringArray(requiredPermissions);
    data.writeInt(appOp);
    data.writeBundle(options);
    data.writeInt(serialized ? 1 : 0);
    data.writeInt(sticky ? 1 : 0);
    data.writeInt(userId);
    mRemote.transact(BROADCAST_INTENT_TRANSACTION, data, reply, 0);
    reply.readException();
    int res = reply.readInt();
    reply.recycle();
    data.recycle();
    return res;
}

ActivityManagerService

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public final int broadcastIntent(IApplicationThread caller,
        Intent intent, String resolvedType, IIntentReceiver resultTo,
        int resultCode, String resultData, Bundle resultExtras,
        String[] requiredPermissions, int appOp, Bundle options,
        boolean serialized, boolean sticky, int userId) {
    enforceNotIsolatedCaller("broadcastIntent");
    synchronized(this) {
        intent = verifyBroadcastLocked(intent);

        final ProcessRecord callerApp = getRecordForAppLocked(caller);
        final int callingPid = Binder.getCallingPid();
        final int callingUid = Binder.getCallingUid();
        final long origId = Binder.clearCallingIdentity();
        int res = broadcastIntentLocked(callerApp,
                callerApp != null ? callerApp.info.packageName : null,
                intent, resolvedType, resultTo, resultCode, resultData, resultExtras,
                requiredPermissions, appOp, null, serialized, sticky,
                callingPid, callingUid, userId);
        Binder.restoreCallingIdentity(origId);
        return res;
    }
}



private final int broadcastIntentLocked(ProcessRecord callerApp,
        String callerPackage, Intent intent, String resolvedType,
        IIntentReceiver resultTo, int resultCode, String resultData,
        Bundle resultExtras, String[] requiredPermissions, int appOp, Bundle options,
        boolean ordered, boolean sticky, int callingPid, int callingUid, int userId) {
    intent = new Intent(intent);

    // By default broadcasts do not go to stopped apps.
    intent.addFlags(Intent.FLAG_EXCLUDE_STOPPED_PACKAGES);

    // If we have not finished booting, don't allow this to launch new processes.
    if (!mProcessesReady && (intent.getFlags()&Intent.FLAG_RECEIVER_BOOT_UPGRADE) == 0) {
        intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
    }

    if (DEBUG_BROADCAST_LIGHT) Slog.v(TAG_BROADCAST,
            (sticky ? "Broadcast sticky: ": "Broadcast: ") + intent
            + " ordered=" + ordered + " userid=" + userId);
    if ((resultTo != null) && !ordered) {
        Slog.w(TAG, "Broadcast " + intent + " not ordered but result callback requested!");
    }

    userId = handleIncomingUser(callingPid, callingUid, userId,
            true, ALLOW_NON_FULL, "broadcast", callerPackage);

    // Make sure that the user who is receiving this broadcast is running.
    // If not, we will just skip it. Make an exception for shutdown broadcasts
    // and upgrade steps.

    if (userId != UserHandle.USER_ALL && !isUserRunningLocked(userId, false)) {
        if ((callingUid != Process.SYSTEM_UID
                || (intent.getFlags() & Intent.FLAG_RECEIVER_BOOT_UPGRADE) == 0)
                && !Intent.ACTION_SHUTDOWN.equals(intent.getAction())) {
            Slog.w(TAG, "Skipping broadcast of " + intent
                    + ": user " + userId + " is stopped");
            return ActivityManager.BROADCAST_FAILED_USER_STOPPED;
        }
    }

    BroadcastOptions brOptions = null;
    if (options != null) {
        brOptions = new BroadcastOptions(options);
        if (brOptions.getTemporaryAppWhitelistDuration() > 0) {
            // See if the caller is allowed to do this.  Note we are checking against
            // the actual real caller (not whoever provided the operation as say a
            // PendingIntent), because that who is actually supplied the arguments.
            if (checkComponentPermission(
                    android.Manifest.permission.CHANGE_DEVICE_IDLE_TEMP_WHITELIST,
                    Binder.getCallingPid(), Binder.getCallingUid(), -1, true)
                    != PackageManager.PERMISSION_GRANTED) {
                String msg = "Permission Denial: " + intent.getAction()
                        + " broadcast from " + callerPackage + " (pid=" + callingPid
                        + ", uid=" + callingUid + ")"
                        + " requires "
                        + android.Manifest.permission.CHANGE_DEVICE_IDLE_TEMP_WHITELIST;
                Slog.w(TAG, msg);
                throw new SecurityException(msg);
            }
        }
    }

    /*
     * Prevent non-system code (defined here to be non-persistent
     * processes) from sending protected broadcasts.
     */
    int callingAppId = UserHandle.getAppId(callingUid);
    if (callingAppId == Process.SYSTEM_UID || callingAppId == Process.PHONE_UID
        || callingAppId == Process.SHELL_UID || callingAppId == Process.BLUETOOTH_UID
        || callingAppId == Process.NFC_UID || callingUid == 0) {
        // Always okay.
    } else if (callerApp == null || !callerApp.persistent) {
        try {
            if (AppGlobals.getPackageManager().isProtectedBroadcast(
                    intent.getAction())) {
                String msg = "Permission Denial: not allowed to send broadcast "
                        + intent.getAction() + " from pid="
                        + callingPid + ", uid=" + callingUid;
                Slog.w(TAG, msg);
                throw new SecurityException(msg);
            } else if (AppWidgetManager.ACTION_APPWIDGET_CONFIGURE.equals(intent.getAction())) {
                // Special case for compatibility: we don't want apps to send this,
                // but historically it has not been protected and apps may be using it
                // to poke their own app widget.  So, instead of making it protected,
                // just limit it to the caller.
                if (callerApp == null) {
                    String msg = "Permission Denial: not allowed to send broadcast "
                            + intent.getAction() + " from unknown caller.";
                    Slog.w(TAG, msg);
                    throw new SecurityException(msg);
                } else if (intent.getComponent() != null) {
                    // They are good enough to send to an explicit component...  verify
                    // it is being sent to the calling app.
                    if (!intent.getComponent().getPackageName().equals(
                            callerApp.info.packageName)) {
                        String msg = "Permission Denial: not allowed to send broadcast "
                                + intent.getAction() + " to "
                                + intent.getComponent().getPackageName() + " from "
                                + callerApp.info.packageName;
                        Slog.w(TAG, msg);
                        throw new SecurityException(msg);
                    }
                } else {
                    // Limit broadcast to their own package.
                    intent.setPackage(callerApp.info.packageName);
                }
            }
        } catch (RemoteException e) {
            Slog.w(TAG, "Remote exception", e);
            return ActivityManager.BROADCAST_SUCCESS;
        }
    }

    final String action = intent.getAction();
    if (action != null) {
        switch (action) {
            case Intent.ACTION_UID_REMOVED:
            case Intent.ACTION_PACKAGE_REMOVED:
            case Intent.ACTION_PACKAGE_CHANGED:
            case Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE:
            case Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE:
                // Handle special intents: if this broadcast is from the package
                // manager about a package being removed, we need to remove all of
                // its activities from the history stack.
                if (checkComponentPermission(
                        android.Manifest.permission.BROADCAST_PACKAGE_REMOVED,
                        callingPid, callingUid, -1, true)
                        != PackageManager.PERMISSION_GRANTED) {
                    String msg = "Permission Denial: " + intent.getAction()
                            + " broadcast from " + callerPackage + " (pid=" + callingPid
                            + ", uid=" + callingUid + ")"
                            + " requires "
                            + android.Manifest.permission.BROADCAST_PACKAGE_REMOVED;
                    Slog.w(TAG, msg);
                    throw new SecurityException(msg);
                }
                switch (action) {
                    case Intent.ACTION_UID_REMOVED:
                        final Bundle intentExtras = intent.getExtras();
                        final int uid = intentExtras != null
                                ? intentExtras.getInt(Intent.EXTRA_UID) : -1;
                        if (uid >= 0) {
                            mBatteryStatsService.removeUid(uid);
                            mAppOpsService.uidRemoved(uid);
                        }
                        break;
                    case Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE:
                        // If resources are unavailable just force stop all those packages
                        // and flush the attribute cache as well.
                        String list[] =
                                intent.getStringArrayExtra(Intent.EXTRA_CHANGED_PACKAGE_LIST);
                        if (list != null && list.length > 0) {
                            for (int i = 0; i < list.length; i++) {
                                forceStopPackageLocked(list[i], -1, false, true, true,
                                        false, false, userId, "storage unmount");
                            }
                            mRecentTasks.cleanupLocked(UserHandle.USER_ALL);
                            sendPackageBroadcastLocked(
                                    IApplicationThread.EXTERNAL_STORAGE_UNAVAILABLE, list,
                                    userId);
                        }
                        break;
                    case Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE:
                        mRecentTasks.cleanupLocked(UserHandle.USER_ALL);
                        break;
                    case Intent.ACTION_PACKAGE_REMOVED:
                    case Intent.ACTION_PACKAGE_CHANGED:
                        Uri data = intent.getData();
                        String ssp;
                        if (data != null && (ssp=data.getSchemeSpecificPart()) != null) {
                            boolean removed = Intent.ACTION_PACKAGE_REMOVED.equals(action);
                            boolean fullUninstall = removed &&
                                    !intent.getBooleanExtra(Intent.EXTRA_REPLACING, false);
                            if (!intent.getBooleanExtra(Intent.EXTRA_DONT_KILL_APP, false)) {
                                forceStopPackageLocked(ssp, UserHandle.getAppId(
                                        intent.getIntExtra(Intent.EXTRA_UID, -1)),
                                        false, true, true, false, fullUninstall, userId,
                                        removed ? "pkg removed" : "pkg changed");
                            }
                            if (removed) {
                                sendPackageBroadcastLocked(IApplicationThread.PACKAGE_REMOVED,
                                        new String[] {ssp}, userId);
                                if (fullUninstall) {
                                    mAppOpsService.packageRemoved(
                                            intent.getIntExtra(Intent.EXTRA_UID, -1), ssp);

                                    // Remove all permissions granted from/to this package
                                    removeUriPermissionsForPackageLocked(ssp, userId, true);

                                    removeTasksByPackageNameLocked(ssp, userId);
                                    mBatteryStatsService.notePackageUninstalled(ssp);
                                }
                            } else {
                                cleanupDisabledPackageComponentsLocked(ssp, userId,
                                        intent.getStringArrayExtra(
                                                Intent.EXTRA_CHANGED_COMPONENT_NAME_LIST));
                            }
                        }
                        break;
                }
                break;
            case Intent.ACTION_PACKAGE_ADDED:
                // Special case for adding a package: by default turn on compatibility mode.
                Uri data = intent.getData();
                String ssp;
                if (data != null && (ssp = data.getSchemeSpecificPart()) != null) {
                    final boolean replacing =
                            intent.getBooleanExtra(Intent.EXTRA_REPLACING, false);
                    mCompatModePackages.handlePackageAddedLocked(ssp, replacing);

                    try {
                        ApplicationInfo ai = AppGlobals.getPackageManager().
                                getApplicationInfo(ssp, 0, 0);
                        mBatteryStatsService.notePackageInstalled(ssp,
                                ai != null ? ai.versionCode : 0);
                    } catch (RemoteException e) {
                    }
                }
                break;
            case Intent.ACTION_TIMEZONE_CHANGED:
                // If this is the time zone changed action, queue up a message that will reset
                // the timezone of all currently running processes. This message will get
                // queued up before the broadcast happens.
                mHandler.sendEmptyMessage(UPDATE_TIME_ZONE);
                break;
            case Intent.ACTION_TIME_CHANGED:
                // If the user set the time, let all running processes know.
                final int is24Hour =
                        intent.getBooleanExtra(Intent.EXTRA_TIME_PREF_24_HOUR_FORMAT, false) ? 1
                                : 0;
                mHandler.sendMessage(mHandler.obtainMessage(UPDATE_TIME, is24Hour, 0));
                BatteryStatsImpl stats = mBatteryStatsService.getActiveStatistics();
                synchronized (stats) {
                    stats.noteCurrentTimeChangedLocked();
                }
                break;
            case Intent.ACTION_CLEAR_DNS_CACHE:
                mHandler.sendEmptyMessage(CLEAR_DNS_CACHE_MSG);
                break;
            case Proxy.PROXY_CHANGE_ACTION:
                ProxyInfo proxy = intent.getParcelableExtra(Proxy.EXTRA_PROXY_INFO);
                mHandler.sendMessage(mHandler.obtainMessage(UPDATE_HTTP_PROXY_MSG, proxy));
                break;
        }
    }

    // Add to the sticky list if requested.
    if (sticky) {
        if (checkPermission(android.Manifest.permission.BROADCAST_STICKY,
                callingPid, callingUid)
                != PackageManager.PERMISSION_GRANTED) {
            String msg = "Permission Denial: broadcastIntent() requesting a sticky broadcast from pid="
                    + callingPid + ", uid=" + callingUid
                    + " requires " + android.Manifest.permission.BROADCAST_STICKY;
            Slog.w(TAG, msg);
            throw new SecurityException(msg);
        }
        if (requiredPermissions != null && requiredPermissions.length > 0) {
            Slog.w(TAG, "Can't broadcast sticky intent " + intent
                    + " and enforce permissions " + Arrays.toString(requiredPermissions));
            return ActivityManager.BROADCAST_STICKY_CANT_HAVE_PERMISSION;
        }
        if (intent.getComponent() != null) {
            throw new SecurityException(
                    "Sticky broadcasts can't target a specific component");
        }
        // We use userId directly here, since the "all" target is maintained
        // as a separate set of sticky broadcasts.
        if (userId != UserHandle.USER_ALL) {
            // But first, if this is not a broadcast to all users, then
            // make sure it doesn't conflict with an existing broadcast to
            // all users.
            ArrayMap<String, ArrayList<Intent>> stickies = mStickyBroadcasts.get(
                    UserHandle.USER_ALL);
            if (stickies != null) {
                ArrayList<Intent> list = stickies.get(intent.getAction());
                if (list != null) {
                    int N = list.size();
                    int i;
                    for (i=0; i<N; i++) {
                        if (intent.filterEquals(list.get(i))) {
                            throw new IllegalArgumentException(
                                    "Sticky broadcast " + intent + " for user "
                                    + userId + " conflicts with existing global broadcast");
                        }
                    }
                }
            }
        }
        ArrayMap<String, ArrayList<Intent>> stickies = mStickyBroadcasts.get(userId);
        if (stickies == null) {
            stickies = new ArrayMap<>();
            mStickyBroadcasts.put(userId, stickies);
        }
        ArrayList<Intent> list = stickies.get(intent.getAction());
        if (list == null) {
            list = new ArrayList<>();
            stickies.put(intent.getAction(), list);
        }
        final int stickiesCount = list.size();
        int i;
        for (i = 0; i < stickiesCount; i++) {
            if (intent.filterEquals(list.get(i))) {
                // This sticky already exists, replace it.
                list.set(i, new Intent(intent));
                break;
            }
        }
        if (i >= stickiesCount) {
            list.add(new Intent(intent));
        }
    }

    int[] users;
    if (userId == UserHandle.USER_ALL) {
        // Caller wants broadcast to go to all started users.
        users = mStartedUserArray;
    } else {
        // Caller wants broadcast to go to one specific user.
        users = new int[] {userId};
    }

    // Figure out who all will receive this broadcast.
    List receivers = null;
    List<BroadcastFilter> registeredReceivers = null;
    // Need to resolve the intent to interested receivers...
    if ((intent.getFlags()&Intent.FLAG_RECEIVER_REGISTERED_ONLY)
             == 0) {
        receivers = collectReceiverComponents(intent, resolvedType, callingUid, users);
    }
    if (intent.getComponent() == null) {
        if (userId == UserHandle.USER_ALL && callingUid == Process.SHELL_UID) {
            // Query one target user at a time, excluding shell-restricted users
            UserManagerService ums = getUserManagerLocked();
            for (int i = 0; i < users.length; i++) {
                if (ums.hasUserRestriction(
                        UserManager.DISALLOW_DEBUGGING_FEATURES, users[i])) {
                    continue;
                }
                List<BroadcastFilter> registeredReceiversForUser =
                        mReceiverResolver.queryIntent(intent,
                                resolvedType, false, users[i]);
                if (registeredReceivers == null) {
                    registeredReceivers = registeredReceiversForUser;
                } else if (registeredReceiversForUser != null) {
                    registeredReceivers.addAll(registeredReceiversForUser);
                }
            }
        } else {
            registeredReceivers = mReceiverResolver.queryIntent(intent,
                    resolvedType, false, userId);
        }
    }

    final boolean replacePending =
            (intent.getFlags()&Intent.FLAG_RECEIVER_REPLACE_PENDING) != 0;

    if (DEBUG_BROADCAST) Slog.v(TAG_BROADCAST, "Enqueing broadcast: " + intent.getAction()
            + " replacePending=" + replacePending);

    int NR = registeredReceivers != null ? registeredReceivers.size() : 0;
    if (!ordered && NR > 0) {
        // If we are not serializing this broadcast, then send the
        // registered receivers separately so they don't wait for the
        // components to be launched.
        final BroadcastQueue queue = broadcastQueueForIntent(intent);
        BroadcastRecord r = new BroadcastRecord(queue, intent, callerApp,
                callerPackage, callingPid, callingUid, resolvedType, requiredPermissions,
                appOp, brOptions, registeredReceivers, resultTo, resultCode, resultData,
                resultExtras, ordered, sticky, false, userId);
        if (DEBUG_BROADCAST) Slog.v(TAG_BROADCAST, "Enqueueing parallel broadcast " + r);
        final boolean replaced = replacePending && queue.replaceParallelBroadcastLocked(r);
        if (!replaced) {
            queue.enqueueParallelBroadcastLocked(r);
            queue.scheduleBroadcastsLocked();
        }
        registeredReceivers = null;
        NR = 0;
    }

    // Merge into one list.
    int ir = 0;
    if (receivers != null) {
        // A special case for PACKAGE_ADDED: do not allow the package
        // being added to see this broadcast.  This prevents them from
        // using this as a back door to get run as soon as they are
        // installed.  Maybe in the future we want to have a special install
        // broadcast or such for apps, but we'd like to deliberately make
        // this decision.
        String skipPackages[] = null;
        if (Intent.ACTION_PACKAGE_ADDED.equals(intent.getAction())
                || Intent.ACTION_PACKAGE_RESTARTED.equals(intent.getAction())
                || Intent.ACTION_PACKAGE_DATA_CLEARED.equals(intent.getAction())) {
            Uri data = intent.getData();
            if (data != null) {
                String pkgName = data.getSchemeSpecificPart();
                if (pkgName != null) {
                    skipPackages = new String[] { pkgName };
                }
            }
        } else if (Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE.equals(intent.getAction())) {
            skipPackages = intent.getStringArrayExtra(Intent.EXTRA_CHANGED_PACKAGE_LIST);
        }
        if (skipPackages != null && (skipPackages.length > 0)) {
            for (String skipPackage : skipPackages) {
                if (skipPackage != null) {
                    int NT = receivers.size();
                    for (int it=0; it<NT; it++) {
                        ResolveInfo curt = (ResolveInfo)receivers.get(it);
                        if (curt.activityInfo.packageName.equals(skipPackage)) {
                            receivers.remove(it);
                            it--;
                            NT--;
                        }
                    }
                }
            }
        }

        int NT = receivers != null ? receivers.size() : 0;
        int it = 0;
        ResolveInfo curt = null;
        BroadcastFilter curr = null;
        while (it < NT && ir < NR) {
            if (curt == null) {
                curt = (ResolveInfo)receivers.get(it);
            }
            if (curr == null) {
                curr = registeredReceivers.get(ir);
            }
            if (curr.getPriority() >= curt.priority) {
                // Insert this broadcast record into the final list.
                receivers.add(it, curr);
                ir++;
                curr = null;
                it++;
                NT++;
            } else {
                // Skip to the next ResolveInfo in the final list.
                it++;
                curt = null;
            }
        }
    }
    while (ir < NR) {
        if (receivers == null) {
            receivers = new ArrayList();
        }
        receivers.add(registeredReceivers.get(ir));
        ir++;
    }

    if ((receivers != null && receivers.size() > 0)
            || resultTo != null) {
        BroadcastQueue queue = broadcastQueueForIntent(intent);
        BroadcastRecord r = new BroadcastRecord(queue, intent, callerApp,
                callerPackage, callingPid, callingUid, resolvedType,
                requiredPermissions, appOp, brOptions, receivers, resultTo, resultCode,
                resultData, resultExtras, ordered, sticky, false, userId);

        if (DEBUG_BROADCAST) Slog.v(TAG_BROADCAST, "Enqueueing ordered broadcast " + r
                + ": prev had " + queue.mOrderedBroadcasts.size());
        if (DEBUG_BROADCAST) Slog.i(TAG_BROADCAST,
                "Enqueueing broadcast " + r.intent.getAction());

        boolean replaced = replacePending && queue.replaceOrderedBroadcastLocked(r);
        if (!replaced) {
            queue.enqueueOrderedBroadcastLocked(r);
            queue.scheduleBroadcastsLocked();
        }
    }

    return ActivityManager.BROADCAST_SUCCESS;
}

处理广播

BroadcastQueue

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public void scheduleBroadcastsLocked() {
    if (DEBUG_BROADCAST) Slog.v(TAG_BROADCAST, "Schedule broadcasts ["
            + mQueueName + "]: current="
            + mBroadcastsScheduled);

    if (mBroadcastsScheduled) {
        return;
    }
    mHandler.sendMessage(mHandler.obtainMessage(BROADCAST_INTENT_MSG, this));
    mBroadcastsScheduled = true;
}

BroadcastHandler

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private final class BroadcastHandler extends Handler {
    public BroadcastHandler(Looper looper) {
        super(looper, null, true);
    }

    @Override
    public void handleMessage(Message msg) {
        switch (msg.what) {
            case BROADCAST_INTENT_MSG: {
                if (DEBUG_BROADCAST) Slog.v(
                        TAG_BROADCAST, "Received BROADCAST_INTENT_MSG");
                processNextBroadcast(true);
            } break;
            case BROADCAST_TIMEOUT_MSG: {
                synchronized (mService) {
                    broadcastTimeoutLocked(true);
                }
            } break;
            case SCHEDULE_TEMP_WHITELIST_MSG: {
                DeviceIdleController.LocalService dic = mService.mLocalDeviceIdleController;
                if (dic != null) {
                    dic.addPowerSaveTempWhitelistAppDirect(UserHandle.getAppId(msg.arg1),
                            msg.arg2, true, (String)msg.obj);
                }
            } break;
        }
    }
};


final void processNextBroadcast(boolean fromMsg) {
    synchronized(mService) {
        BroadcastRecord r;

        if (DEBUG_BROADCAST) Slog.v(TAG_BROADCAST, "processNextBroadcast ["
                + mQueueName + "]: "
                + mParallelBroadcasts.size() + " broadcasts, "
                + mOrderedBroadcasts.size() + " ordered broadcasts");

        mService.updateCpuStats();

        if (fromMsg) {
            mBroadcastsScheduled = false;
        }

        // First, deliver any non-serialized broadcasts right away.
        while (mParallelBroadcasts.size() > 0) {
            r = mParallelBroadcasts.remove(0);
            r.dispatchTime = SystemClock.uptimeMillis();
            r.dispatchClockTime = System.currentTimeMillis();
            final int N = r.receivers.size();
            if (DEBUG_BROADCAST_LIGHT) Slog.v(TAG_BROADCAST, "Processing parallel broadcast ["
                    + mQueueName + "] " + r);
            for (int i=0; i<N; i++) {
                Object target = r.receivers.get(i);
                if (DEBUG_BROADCAST)  Slog.v(TAG_BROADCAST,
                        "Delivering non-ordered on [" + mQueueName + "] to registered "
                        + target + ": " + r);
                deliverToRegisteredReceiverLocked(r, (BroadcastFilter)target, false);
            }
            addBroadcastToHistoryLocked(r);
            if (DEBUG_BROADCAST_LIGHT) Slog.v(TAG_BROADCAST, "Done with parallel broadcast ["
                    + mQueueName + "] " + r);
        }

        // Now take care of the next serialized one...

        // If we are waiting for a process to come up to handle the next
        // broadcast, then do nothing at this point.  Just in case, we
        // check that the process we're waiting for still exists.
        if (mPendingBroadcast != null) {
            if (DEBUG_BROADCAST_LIGHT) Slog.v(TAG_BROADCAST,
                    "processNextBroadcast [" + mQueueName + "]: waiting for "
                    + mPendingBroadcast.curApp);

            boolean isDead;
            synchronized (mService.mPidsSelfLocked) {
                ProcessRecord proc = mService.mPidsSelfLocked.get(mPendingBroadcast.curApp.pid);
                isDead = proc == null || proc.crashing;
            }
            if (!isDead) {
                // It's still alive, so keep waiting
                return;
            } else {
                Slog.w(TAG, "pending app  ["
                        + mQueueName + "]" + mPendingBroadcast.curApp
                        + " died before responding to broadcast");
                mPendingBroadcast.state = BroadcastRecord.IDLE;
                mPendingBroadcast.nextReceiver = mPendingBroadcastRecvIndex;
                mPendingBroadcast = null;
            }
        }

        boolean looped = false;
        
        do {
            if (mOrderedBroadcasts.size() == 0) {
                // No more broadcasts pending, so all done!
                mService.scheduleAppGcsLocked();
                if (looped) {
                    // If we had finished the last ordered broadcast, then
                    // make sure all processes have correct oom and sched
                    // adjustments.
                    mService.updateOomAdjLocked();
                }
                return;
            }
            r = mOrderedBroadcasts.get(0);
            boolean forceReceive = false;

            // Ensure that even if something goes awry with the timeout
            // detection, we catch "hung" broadcasts here, discard them,
            // and continue to make progress.
            //
            // This is only done if the system is ready so that PRE_BOOT_COMPLETED
            // receivers don't get executed with timeouts. They're intended for
            // one time heavy lifting after system upgrades and can take
            // significant amounts of time.
            int numReceivers = (r.receivers != null) ? r.receivers.size() : 0;
            if (mService.mProcessesReady && r.dispatchTime > 0) {
                long now = SystemClock.uptimeMillis();
                if ((numReceivers > 0) &&
                        (now > r.dispatchTime + (2*mTimeoutPeriod*numReceivers))) {
                    Slog.w(TAG, "Hung broadcast ["
                            + mQueueName + "] discarded after timeout failure:"
                            + " now=" + now
                            + " dispatchTime=" + r.dispatchTime
                            + " startTime=" + r.receiverTime
                            + " intent=" + r.intent
                            + " numReceivers=" + numReceivers
                            + " nextReceiver=" + r.nextReceiver
                            + " state=" + r.state);
                    broadcastTimeoutLocked(false); // forcibly finish this broadcast
                    forceReceive = true;
                    r.state = BroadcastRecord.IDLE;
                }
            }

            if (r.state != BroadcastRecord.IDLE) {
                if (DEBUG_BROADCAST) Slog.d(TAG_BROADCAST,
                        "processNextBroadcast("
                        + mQueueName + ") called when not idle (state="
                        + r.state + ")");
                return;
            }

            if (r.receivers == null || r.nextReceiver >= numReceivers
                    || r.resultAbort || forceReceive) {
                // No more receivers for this broadcast!  Send the final
                // result if requested...
                if (r.resultTo != null) {
                    try {
                        if (DEBUG_BROADCAST) Slog.i(TAG_BROADCAST,
                                "Finishing broadcast [" + mQueueName + "] "
                                + r.intent.getAction() + " app=" + r.callerApp);
                        performReceiveLocked(r.callerApp, r.resultTo,
                            new Intent(r.intent), r.resultCode,
                            r.resultData, r.resultExtras, false, false, r.userId);
                        // Set this to null so that the reference
                        // (local and remote) isn't kept in the mBroadcastHistory.
                        r.resultTo = null;
                    } catch (RemoteException e) {
                        r.resultTo = null;
                        Slog.w(TAG, "Failure ["
                                + mQueueName + "] sending broadcast result of "
                                + r.intent, e);
                    }
                }

                if (DEBUG_BROADCAST) Slog.v(TAG_BROADCAST, "Cancelling BROADCAST_TIMEOUT_MSG");
                cancelBroadcastTimeoutLocked();

                if (DEBUG_BROADCAST_LIGHT) Slog.v(TAG_BROADCAST,
                        "Finished with ordered broadcast " + r);

                // ... and on to the next...
                addBroadcastToHistoryLocked(r);
                mOrderedBroadcasts.remove(0);
                r = null;
                looped = true;
                continue;
            }
        } while (r == null);

        // Get the next receiver...
        int recIdx = r.nextReceiver++;

        // Keep track of when this receiver started, and make sure there
        // is a timeout message pending to kill it if need be.
        r.receiverTime = SystemClock.uptimeMillis();
        if (recIdx == 0) {
            r.dispatchTime = r.receiverTime;
            r.dispatchClockTime = System.currentTimeMillis();
            if (DEBUG_BROADCAST_LIGHT) Slog.v(TAG_BROADCAST, "Processing ordered broadcast ["
                    + mQueueName + "] " + r);
        }
        if (! mPendingBroadcastTimeoutMessage) {
            long timeoutTime = r.receiverTime + mTimeoutPeriod;
            if (DEBUG_BROADCAST) Slog.v(TAG_BROADCAST,
                    "Submitting BROADCAST_TIMEOUT_MSG ["
                    + mQueueName + "] for " + r + " at " + timeoutTime);
            setBroadcastTimeoutLocked(timeoutTime);
        }

        final BroadcastOptions brOptions = r.options;
        final Object nextReceiver = r.receivers.get(recIdx);

        if (nextReceiver instanceof BroadcastFilter) {
            // Simple case: this is a registered receiver who gets
            // a direct call.
            BroadcastFilter filter = (BroadcastFilter)nextReceiver;
            if (DEBUG_BROADCAST)  Slog.v(TAG_BROADCAST,
                    "Delivering ordered ["
                    + mQueueName + "] to registered "
                    + filter + ": " + r);
            deliverToRegisteredReceiverLocked(r, filter, r.ordered);
            if (r.receiver == null || !r.ordered) {
                // The receiver has already finished, so schedule to
                // process the next one.
                if (DEBUG_BROADCAST) Slog.v(TAG_BROADCAST, "Quick finishing ["
                        + mQueueName + "]: ordered="
                        + r.ordered + " receiver=" + r.receiver);
                r.state = BroadcastRecord.IDLE;
                scheduleBroadcastsLocked();
            } else {
                if (brOptions != null && brOptions.getTemporaryAppWhitelistDuration() > 0) {
                    scheduleTempWhitelistLocked(filter.owningUid,
                            brOptions.getTemporaryAppWhitelistDuration(), r);
                }
            }
            return;
        }

        // Hard case: need to instantiate the receiver, possibly
        // starting its application process to host it.

        ResolveInfo info =
            (ResolveInfo)nextReceiver;
        ComponentName component = new ComponentName(
                info.activityInfo.applicationInfo.packageName,
                info.activityInfo.name);

        boolean skip = false;
        int perm = mService.checkComponentPermission(info.activityInfo.permission,
                r.callingPid, r.callingUid, info.activityInfo.applicationInfo.uid,
                info.activityInfo.exported);
        if (perm != PackageManager.PERMISSION_GRANTED) {
            if (!info.activityInfo.exported) {
                Slog.w(TAG, "Permission Denial: broadcasting "
                        + r.intent.toString()
                        + " from " + r.callerPackage + " (pid=" + r.callingPid
                        + ", uid=" + r.callingUid + ")"
                        + " is not exported from uid " + info.activityInfo.applicationInfo.uid
                        + " due to receiver " + component.flattenToShortString());
            } else {
                Slog.w(TAG, "Permission Denial: broadcasting "
                        + r.intent.toString()
                        + " from " + r.callerPackage + " (pid=" + r.callingPid
                        + ", uid=" + r.callingUid + ")"
                        + " requires " + info.activityInfo.permission
                        + " due to receiver " + component.flattenToShortString());
            }
            skip = true;
        } else if (info.activityInfo.permission != null) {
            final int opCode = AppOpsManager.permissionToOpCode(info.activityInfo.permission);
            if (opCode != AppOpsManager.OP_NONE
                    && mService.mAppOpsService.noteOperation(opCode, r.callingUid,
                            r.callerPackage) != AppOpsManager.MODE_ALLOWED) {
                Slog.w(TAG, "Appop Denial: broadcasting "
                        + r.intent.toString()
                        + " from " + r.callerPackage + " (pid="
                        + r.callingPid + ", uid=" + r.callingUid + ")"
                        + " requires appop " + AppOpsManager.permissionToOp(
                                info.activityInfo.permission)
                        + " due to registered receiver "
                        + component.flattenToShortString());
                skip = true;
            }
        }
        if (!skip && info.activityInfo.applicationInfo.uid != Process.SYSTEM_UID &&
            r.requiredPermissions != null && r.requiredPermissions.length > 0) {
            for (int i = 0; i < r.requiredPermissions.length; i++) {
                String requiredPermission = r.requiredPermissions[i];
                try {
                    perm = AppGlobals.getPackageManager().
                            checkPermission(requiredPermission,
                                    info.activityInfo.applicationInfo.packageName,
                                    UserHandle
                                            .getUserId(info.activityInfo.applicationInfo.uid));
                } catch (RemoteException e) {
                    perm = PackageManager.PERMISSION_DENIED;
                }
                if (perm != PackageManager.PERMISSION_GRANTED) {
                    Slog.w(TAG, "Permission Denial: receiving "
                            + r.intent + " to "
                            + component.flattenToShortString()
                            + " requires " + requiredPermission
                            + " due to sender " + r.callerPackage
                            + " (uid " + r.callingUid + ")");
                    skip = true;
                    break;
                }
                int appOp = AppOpsManager.permissionToOpCode(requiredPermission);
                if (appOp != AppOpsManager.OP_NONE && appOp != r.appOp
                        && mService.mAppOpsService.noteOperation(appOp,
                        info.activityInfo.applicationInfo.uid, info.activityInfo.packageName)
                        != AppOpsManager.MODE_ALLOWED) {
                    Slog.w(TAG, "Appop Denial: receiving "
                            + r.intent + " to "
                            + component.flattenToShortString()
                            + " requires appop " + AppOpsManager.permissionToOp(
                            requiredPermission)
                            + " due to sender " + r.callerPackage
                            + " (uid " + r.callingUid + ")");
                    skip = true;
                    break;
                }
            }
        }
        if (!skip && r.appOp != AppOpsManager.OP_NONE
                && mService.mAppOpsService.noteOperation(r.appOp,
                info.activityInfo.applicationInfo.uid, info.activityInfo.packageName)
                != AppOpsManager.MODE_ALLOWED) {
            Slog.w(TAG, "Appop Denial: receiving "
                    + r.intent + " to "
                    + component.flattenToShortString()
                    + " requires appop " + AppOpsManager.opToName(r.appOp)
                    + " due to sender " + r.callerPackage
                    + " (uid " + r.callingUid + ")");
            skip = true;
        }
        if (!skip) {
            skip = !mService.mIntentFirewall.checkBroadcast(r.intent, r.callingUid,
                    r.callingPid, r.resolvedType, info.activityInfo.applicationInfo.uid);
        }
        boolean isSingleton = false;
        try {
            isSingleton = mService.isSingleton(info.activityInfo.processName,
                    info.activityInfo.applicationInfo,
                    info.activityInfo.name, info.activityInfo.flags);
        } catch (SecurityException e) {
            Slog.w(TAG, e.getMessage());
            skip = true;
        }
        if ((info.activityInfo.flags&ActivityInfo.FLAG_SINGLE_USER) != 0) {
            if (ActivityManager.checkUidPermission(
                    android.Manifest.permission.INTERACT_ACROSS_USERS,
                    info.activityInfo.applicationInfo.uid)
                            != PackageManager.PERMISSION_GRANTED) {
                Slog.w(TAG, "Permission Denial: Receiver " + component.flattenToShortString()
                        + " requests FLAG_SINGLE_USER, but app does not hold "
                        + android.Manifest.permission.INTERACT_ACROSS_USERS);
                skip = true;
            }
        }
        if (r.curApp != null && r.curApp.crashing) {
            // If the target process is crashing, just skip it.
            Slog.w(TAG, "Skipping deliver ordered [" + mQueueName + "] " + r
                    + " to " + r.curApp + ": process crashing");
            skip = true;
        }
        if (!skip) {
            boolean isAvailable = false;
            try {
                isAvailable = AppGlobals.getPackageManager().isPackageAvailable(
                        info.activityInfo.packageName,
                        UserHandle.getUserId(info.activityInfo.applicationInfo.uid));
            } catch (Exception e) {
                // all such failures mean we skip this receiver
                Slog.w(TAG, "Exception getting recipient info for "
                        + info.activityInfo.packageName, e);
            }
            if (!isAvailable) {
                if (DEBUG_BROADCAST) Slog.v(TAG_BROADCAST,
                        "Skipping delivery to " + info.activityInfo.packageName + " / "
                        + info.activityInfo.applicationInfo.uid
                        + " : package no longer available");
                skip = true;
            }
        }

        if (skip) {
            if (DEBUG_BROADCAST)  Slog.v(TAG_BROADCAST,
                    "Skipping delivery of ordered [" + mQueueName + "] "
                    + r + " for whatever reason");
            r.receiver = null;
            r.curFilter = null;
            r.state = BroadcastRecord.IDLE;
            scheduleBroadcastsLocked();
            return;
        }

        r.state = BroadcastRecord.APP_RECEIVE;
        String targetProcess = info.activityInfo.processName;
        r.curComponent = component;
        final int receiverUid = info.activityInfo.applicationInfo.uid;
        // If it's a singleton, it needs to be the same app or a special app
        if (r.callingUid != Process.SYSTEM_UID && isSingleton
                && mService.isValidSingletonCall(r.callingUid, receiverUid)) {
            info.activityInfo = mService.getActivityInfoForUser(info.activityInfo, 0);
        }
        r.curReceiver = info.activityInfo;
        if (DEBUG_MU && r.callingUid > UserHandle.PER_USER_RANGE) {
            Slog.v(TAG_MU, "Updated broadcast record activity info for secondary user, "
                    + info.activityInfo + ", callingUid = " + r.callingUid + ", uid = "
                    + info.activityInfo.applicationInfo.uid);
        }

        if (brOptions != null && brOptions.getTemporaryAppWhitelistDuration() > 0) {
            scheduleTempWhitelistLocked(receiverUid,
                    brOptions.getTemporaryAppWhitelistDuration(), r);
        }

        // Broadcast is being executed, its package can't be stopped.
        try {
            AppGlobals.getPackageManager().setPackageStoppedState(
                    r.curComponent.getPackageName(), false, UserHandle.getUserId(r.callingUid));
        } catch (RemoteException e) {
        } catch (IllegalArgumentException e) {
            Slog.w(TAG, "Failed trying to unstop package "
                    + r.curComponent.getPackageName() + ": " + e);
        }

        // Is this receiver's application already running?
        ProcessRecord app = mService.getProcessRecordLocked(targetProcess,
                info.activityInfo.applicationInfo.uid, false);
        if (app != null && app.thread != null) {
            try {
                app.addPackage(info.activityInfo.packageName,
                        info.activityInfo.applicationInfo.versionCode, mService.mProcessStats);
                processCurBroadcastLocked(r, app);
                return;
            } catch (RemoteException e) {
                Slog.w(TAG, "Exception when sending broadcast to "
                      + r.curComponent, e);
            } catch (RuntimeException e) {
                Slog.wtf(TAG, "Failed sending broadcast to "
                        + r.curComponent + " with " + r.intent, e);
                // If some unexpected exception happened, just skip
                // this broadcast.  At this point we are not in the call
                // from a client, so throwing an exception out from here
                // will crash the entire system instead of just whoever
                // sent the broadcast.
                logBroadcastReceiverDiscardLocked(r);
                finishReceiverLocked(r, r.resultCode, r.resultData,
                        r.resultExtras, r.resultAbort, false);
                scheduleBroadcastsLocked();
                // We need to reset the state if we failed to start the receiver.
                r.state = BroadcastRecord.IDLE;
                return;
            }

            // If a dead object exception was thrown -- fall through to
            // restart the application.
        }

        // Not running -- get it started, to be executed when the app comes up.
        if (DEBUG_BROADCAST)  Slog.v(TAG_BROADCAST,
                "Need to start app ["
                + mQueueName + "] " + targetProcess + " for broadcast " + r);
        if ((r.curApp=mService.startProcessLocked(targetProcess,
                info.activityInfo.applicationInfo, true,
                r.intent.getFlags() | Intent.FLAG_FROM_BACKGROUND,
                "broadcast", r.curComponent,
                (r.intent.getFlags()&Intent.FLAG_RECEIVER_BOOT_UPGRADE) != 0, false, false))
                        == null) {
            // Ah, this recipient is unavailable.  Finish it if necessary,
            // and mark the broadcast record as ready for the next.
            Slog.w(TAG, "Unable to launch app "
                    + info.activityInfo.applicationInfo.packageName + "/"
                    + info.activityInfo.applicationInfo.uid + " for broadcast "
                    + r.intent + ": process is bad");
            logBroadcastReceiverDiscardLocked(r);
            finishReceiverLocked(r, r.resultCode, r.resultData,
                    r.resultExtras, r.resultAbort, false);
            scheduleBroadcastsLocked();
            r.state = BroadcastRecord.IDLE;
            return;
        }

        mPendingBroadcast = r;
        mPendingBroadcastRecvIndex = recIdx;
    }
}


private void deliverToRegisteredReceiverLocked(BroadcastRecord r,
        BroadcastFilter filter, boolean ordered) {
    boolean skip = false;
    if (filter.requiredPermission != null) {
        int perm = mService.checkComponentPermission(filter.requiredPermission,
                r.callingPid, r.callingUid, -1, true);
        if (perm != PackageManager.PERMISSION_GRANTED) {
            Slog.w(TAG, "Permission Denial: broadcasting "
                    + r.intent.toString()
                    + " from " + r.callerPackage + " (pid="
                    + r.callingPid + ", uid=" + r.callingUid + ")"
                    + " requires " + filter.requiredPermission
                    + " due to registered receiver " + filter);
            skip = true;
        } else {
            final int opCode = AppOpsManager.permissionToOpCode(filter.requiredPermission);
            if (opCode != AppOpsManager.OP_NONE
                    && mService.mAppOpsService.noteOperation(opCode, r.callingUid,
                            r.callerPackage) != AppOpsManager.MODE_ALLOWED) {
                Slog.w(TAG, "Appop Denial: broadcasting "
                        + r.intent.toString()
                        + " from " + r.callerPackage + " (pid="
                        + r.callingPid + ", uid=" + r.callingUid + ")"
                        + " requires appop " + AppOpsManager.permissionToOp(
                                filter.requiredPermission)
                        + " due to registered receiver " + filter);
                skip = true;
            }
        }
    }
    if (!skip && r.requiredPermissions != null && r.requiredPermissions.length > 0) {
        for (int i = 0; i < r.requiredPermissions.length; i++) {
            String requiredPermission = r.requiredPermissions[i];
            int perm = mService.checkComponentPermission(requiredPermission,
                    filter.receiverList.pid, filter.receiverList.uid, -1, true);
            if (perm != PackageManager.PERMISSION_GRANTED) {
                Slog.w(TAG, "Permission Denial: receiving "
                        + r.intent.toString()
                        + " to " + filter.receiverList.app
                        + " (pid=" + filter.receiverList.pid
                        + ", uid=" + filter.receiverList.uid + ")"
                        + " requires " + requiredPermission
                        + " due to sender " + r.callerPackage
                        + " (uid " + r.callingUid + ")");
                skip = true;
                break;
            }
            int appOp = AppOpsManager.permissionToOpCode(requiredPermission);
            if (appOp != r.appOp
                    && mService.mAppOpsService.noteOperation(appOp,
                    filter.receiverList.uid, filter.packageName)
                    != AppOpsManager.MODE_ALLOWED) {
                Slog.w(TAG, "Appop Denial: receiving "
                        + r.intent.toString()
                        + " to " + filter.receiverList.app
                        + " (pid=" + filter.receiverList.pid
                        + ", uid=" + filter.receiverList.uid + ")"
                        + " requires appop " + AppOpsManager.permissionToOp(
                        requiredPermission)
                        + " due to sender " + r.callerPackage
                        + " (uid " + r.callingUid + ")");
                skip = true;
                break;
            }
        }
    }
    if (!skip && (r.requiredPermissions == null || r.requiredPermissions.length == 0)) {
        int perm = mService.checkComponentPermission(null,
                filter.receiverList.pid, filter.receiverList.uid, -1, true);
        if (perm != PackageManager.PERMISSION_GRANTED) {
            Slog.w(TAG, "Permission Denial: security check failed when receiving "
                    + r.intent.toString()
                    + " to " + filter.receiverList.app
                    + " (pid=" + filter.receiverList.pid
                    + ", uid=" + filter.receiverList.uid + ")"
                    + " due to sender " + r.callerPackage
                    + " (uid " + r.callingUid + ")");
            skip = true;
        }
    }
    if (!skip && r.appOp != AppOpsManager.OP_NONE
            && mService.mAppOpsService.noteOperation(r.appOp,
            filter.receiverList.uid, filter.packageName)
            != AppOpsManager.MODE_ALLOWED) {
        Slog.w(TAG, "Appop Denial: receiving "
                + r.intent.toString()
                + " to " + filter.receiverList.app
                + " (pid=" + filter.receiverList.pid
                + ", uid=" + filter.receiverList.uid + ")"
                + " requires appop " + AppOpsManager.opToName(r.appOp)
                + " due to sender " + r.callerPackage
                + " (uid " + r.callingUid + ")");
        skip = true;
    }

    if (!mService.mIntentFirewall.checkBroadcast(r.intent, r.callingUid,
            r.callingPid, r.resolvedType, filter.receiverList.uid)) {
        return;
    }

    if (filter.receiverList.app == null || filter.receiverList.app.crashing) {
        Slog.w(TAG, "Skipping deliver [" + mQueueName + "] " + r
                + " to " + filter.receiverList + ": process crashing");
        skip = true;
    }

    if (!skip) {
        // If this is not being sent as an ordered broadcast, then we
        // don't want to touch the fields that keep track of the current
        // state of ordered broadcasts.
        if (ordered) {
            r.receiver = filter.receiverList.receiver.asBinder();
            r.curFilter = filter;
            filter.receiverList.curBroadcast = r;
            r.state = BroadcastRecord.CALL_IN_RECEIVE;
            if (filter.receiverList.app != null) {
                // Bump hosting application to no longer be in background
                // scheduling class.  Note that we can't do that if there
                // isn't an app...  but we can only be in that case for
                // things that directly call the IActivityManager API, which
                // are already core system stuff so don't matter for this.
                r.curApp = filter.receiverList.app;
                filter.receiverList.app.curReceiver = r;
                mService.updateOomAdjLocked(r.curApp);
            }
        }
        try {
            if (DEBUG_BROADCAST_LIGHT) Slog.i(TAG_BROADCAST,
                    "Delivering to " + filter + " : " + r);
            performReceiveLocked(filter.receiverList.app, filter.receiverList.receiver,
                    new Intent(r.intent), r.resultCode, r.resultData,
                    r.resultExtras, r.ordered, r.initialSticky, r.userId);
            if (ordered) {
                r.state = BroadcastRecord.CALL_DONE_RECEIVE;
            }
        } catch (RemoteException e) {
            Slog.w(TAG, "Failure sending broadcast " + r.intent, e);
            if (ordered) {
                r.receiver = null;
                r.curFilter = null;
                filter.receiverList.curBroadcast = null;
                if (filter.receiverList.app != null) {
                    filter.receiverList.app.curReceiver = null;
                }
            }
        }
    }
}


private static void performReceiveLocked(ProcessRecord app, IIntentReceiver receiver,
        Intent intent, int resultCode, String data, Bundle extras,
        boolean ordered, boolean sticky, int sendingUser) throws RemoteException {
    // Send the intent to the receiver asynchronously using one-way binder calls.
    if (app != null) {
        if (app.thread != null) {
            // If we have an app thread, do the call through that so it is
            // correctly ordered with other one-way calls.
            app.thread.scheduleRegisteredReceiver(receiver, intent, resultCode,
                    data, extras, ordered, sticky, sendingUser, app.repProcState);
        } else {
            // Application has died. Receiver doesn't exist.
            throw new RemoteException("app.thread must not be null");
        }
    } else {
        receiver.performReceive(intent, resultCode, data, extras, ordered,
                sticky, sendingUser);
    }
}

ActivityThread

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public void scheduleRegisteredReceiver(IIntentReceiver receiver, Intent intent,
        int resultCode, String dataStr, Bundle extras, boolean ordered,
        boolean sticky, int sendingUser, int processState) throws RemoteException {
    updateProcessState(processState, false);
    receiver.performReceive(intent, resultCode, dataStr, extras, ordered,
            sticky, sendingUser);
}

InnerReceiver

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public void performReceive(Intent intent, int resultCode, String data,
        Bundle extras, boolean ordered, boolean sticky, int sendingUser) {
    LoadedApk.ReceiverDispatcher rd = mDispatcher.get();
    if (ActivityThread.DEBUG_BROADCAST) {
        int seq = intent.getIntExtra("seq", -1);
        Slog.i(ActivityThread.TAG, "Receiving broadcast " + intent.getAction() + " seq=" + seq
                + " to " + (rd != null ? rd.mReceiver : null));
    }
    if (rd != null) {
        rd.performReceive(intent, resultCode, data, extras,
                ordered, sticky, sendingUser);
    } else {
        // The activity manager dispatched a broadcast to a registered
        // receiver in this process, but before it could be delivered the
        // receiver was unregistered.  Acknowledge the broadcast on its
        // behalf so that the system's broadcast sequence can continue.
        if (ActivityThread.DEBUG_BROADCAST) Slog.i(ActivityThread.TAG,
                "Finishing broadcast to unregistered receiver");
        IActivityManager mgr = ActivityManagerNative.getDefault();
        try {
            if (extras != null) {
                extras.setAllowFds(false);
            }
            mgr.finishReceiver(this, resultCode, data, extras, false, intent.getFlags());
        } catch (RemoteException e) {
            Slog.w(ActivityThread.TAG, "Couldn't finish broadcast to unregistered receiver");
        }
    }
}

ReceiverDispatcher

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public void performReceive(Intent intent, int resultCode, String data,
        Bundle extras, boolean ordered, boolean sticky, int sendingUser) {
    if (ActivityThread.DEBUG_BROADCAST) {
        int seq = intent.getIntExtra("seq", -1);
        Slog.i(ActivityThread.TAG, "Enqueueing broadcast " + intent.getAction() + " seq=" + seq
                + " to " + mReceiver);
    }
    Args args = new Args(intent, resultCode, data, extras, ordered,
            sticky, sendingUser);
    if (!mActivityThread.post(args)) {
        if (mRegistered && ordered) {
            IActivityManager mgr = ActivityManagerNative.getDefault();
            if (ActivityThread.DEBUG_BROADCAST) Slog.i(ActivityThread.TAG,
                    "Finishing sync broadcast to " + mReceiver);
            args.sendFinished(mgr);
        }
    }
}

Args

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public void run() {
    final BroadcastReceiver receiver = mReceiver;
    final boolean ordered = mOrdered;
    
    if (ActivityThread.DEBUG_BROADCAST) {
        int seq = mCurIntent.getIntExtra("seq", -1);
        Slog.i(ActivityThread.TAG, "Dispatching broadcast " + mCurIntent.getAction()
                + " seq=" + seq + " to " + mReceiver);
        Slog.i(ActivityThread.TAG, "  mRegistered=" + mRegistered
                + " mOrderedHint=" + ordered);
    }
    
    final IActivityManager mgr = ActivityManagerNative.getDefault();
    final Intent intent = mCurIntent;
    mCurIntent = null;
    
    if (receiver == null || mForgotten) {
        if (mRegistered && ordered) {
            if (ActivityThread.DEBUG_BROADCAST) Slog.i(ActivityThread.TAG,
                    "Finishing null broadcast to " + mReceiver);
            sendFinished(mgr);
        }
        return;
    }

    Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "broadcastReceiveReg");
    try {
        ClassLoader cl =  mReceiver.getClass().getClassLoader();
        intent.setExtrasClassLoader(cl);
        setExtrasClassLoader(cl);
        receiver.setPendingResult(this);
        receiver.onReceive(mContext, intent);
    } catch (Exception e) {
        if (mRegistered && ordered) {
            if (ActivityThread.DEBUG_BROADCAST) Slog.i(ActivityThread.TAG,
                    "Finishing failed broadcast to " + mReceiver);
            sendFinished(mgr);
        }
        if (mInstrumentation == null ||
                !mInstrumentation.onException(mReceiver, e)) {
            Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
            throw new RuntimeException(
                "Error receiving broadcast " + intent
                + " in " + mReceiver, e);
        }
    }
    
    if (receiver.getPendingResult() != null) {
        finish();
    }
    Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
}
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