bindservice startservice_函数调用流程

    @Override
    public boolean bindService(Intent service, ServiceConnection conn,
            int flags) {
        warnIfCallingFromSystemProcess();
        return bindServiceCommon(service, conn, flags, mMainThread.getHandler(),
                Process.myUserHandle());
    }

    private boolean bindServiceCommon(Intent service, 
                                 ServiceConnection conn, int flags, 
                                Handler handler, UserHandle user) {
        IServiceConnection sd; 
        if (conn == null) {
            throw new IllegalArgumentException("connection is null");
        }
        if (mPackageInfo != null) {
            sd = mPackageInfo.getServiceDispatcher(conn, getOuterContext(), handler, flags);
             //sd = android.app.LoadedApk$ServiceDispatcher$InnerConnection@8df116d
        } else {
            throw new RuntimeException("Not supported in system context");
        }
       
        validateServiceIntent(service);
        try {
            IBinder token = getActivityToken();
            if (token == null && (flags&BIND_AUTO_CREATE) == 0 && mPackageInfo != null
                    && mPackageInfo.getApplicationInfo().targetSdkVersion
                    < android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
                flags |= BIND_WAIVE_PRIORITY;
            }
            service.prepareToLeaveProcess(this);
            //经过Binder调用到AMS.bindService
            int res = ActivityManager.getService().bindService(
                mMainThread.getApplicationThread(), getActivityToken(), service,
                service.resolveTypeIfNeeded(getContentResolver()),
                sd, flags, getOpPackageName(), user.getIdentifier());
            if (res < 0) {
                throw new SecurityException(
                        "Not allowed to bind to service " + service);
            }
            return res != 0;
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

public int bindService(IApplicationThread caller, IBinder token, Intent service,
            String resolvedType, IServiceConnection connection, int flags, String callingPackage,
            int userId) throws TransactionTooLargeException {
        enforceNotIsolatedCaller("bindService");

        //参数经过Binder调用connection=android.app.IServiceConnection$Stub$Proxy@884748

        // Refuse possible leaked file descriptors
        if (service != null && service.hasFileDescriptors() == true) {
            throw new IllegalArgumentException("File descriptors passed in Intent");
        }

        if (callingPackage == null) {
            throw new IllegalArgumentException("callingPackage cannot be null");
        }

        synchronized(this) {
            //mServices的类型是ActiveServices
            return mServices.bindServiceLocked(caller, token, service,
                    resolvedType, connection, flags, callingPackage, userId);
        }
    }

int bindServiceLocked(IApplicationThread caller, IBinder token, Intent service,
String resolvedType, final IServiceConnection connection, int flags,
String callingPackage, final int userId) throws TransactionTooLargeException {
final ProcessRecord callerApp = mAm.getRecordForAppLocked(caller);
if (callerApp == null) {//callerApp不为null
...//代码不执行
}
ActivityRecord activity = null;
if (token != null) {
activity = ActivityRecord.isInStackLocked(token);
if (activity == null) { //activity不为null
Slog.w(TAG, "Binding with unknown activity: " + token);
return 0; 
}
}
int clientLabel = 0;
PendingIntent clientIntent = null;
final boolean isCallerSystem = callerApp.info.uid == Process.SYSTEM_UID;
//isCallerSystem = false
if (isCallerSystem) { //代码不会执行
......
}
if ((flags&Context.BIND_TREAT_LIKE_ACTIVITY) != 0) { //没有设置该flag,代码不会执行
...
}
if ((flags & Context.BIND_ALLOW_WHITELIST_MANAGEMENT) != 0 && !isCallerSystem) {
... //没有设置BIND_ALLOW_WHITELIST_MANAGEMENT，代码不会执行
}
final boolean callerFg = callerApp.setSchedGroup != ProcessList.SCHED_GROUP_BACKGROUND;
final boolean isBindExternal = (flags & Context.BIND_EXTERNAL_SERVICE) != 0;
//callerFg = true , isBindExternal = false
ServiceLookupResult res =
retrieveServiceLocked(service, resolvedType, callingPackage, Binder.getCallingPid(),
Binder.getCallingUid(), userId, true, callerFg, isBindExternal);
if (res == null) { //res 不为null
return 0;
}
if (res.record == null) { //res.record 不为null
return -1;
}
ServiceRecord s = res.record;
boolean permissionsReviewRequired = false;
//mAm.mPermissionReviewRequired为false，表示不需用户手动授权
if (mAm.mPermissionReviewRequired) {
......//代码不会执行
}
final long origId = Binder.clearCallingIdentity();
try {
if (unscheduleServiceRestartLocked(s, callerApp.info.uid, false)) {
....//
}
//设置了该flag-BIND_AUTO_CREATE
if ((flags&Context.BIND_AUTO_CREATE) != 0) {
s.lastActivity = SystemClock.uptimeMillis();
if (!s.hasAutoCreateConnections()) { //结果为false，代码执行
// This is the first binding, let the tracker know.
ServiceState stracker = s.getTracker();
if (stracker != null) {
stracker.setBound(true, mAm.mProcessStats.getMemFactorLocked(),
s.lastActivity);
}
}
}
mAm.startAssociationLocked(callerApp.uid, callerApp.processName, callerApp.curProcState,
s.appInfo.uid, s.name, s.processName);
mAm.grantEphemeralAccessLocked(callerApp.userId, service,
s.appInfo.uid, UserHandle.getAppId(callerApp.uid));
AppBindRecord b = s.retrieveAppBindingLocked(service, callerApp);
ConnectionRecord c = new ConnectionRecord(b, activity,
connection, flags, clientLabel, clientIntent);
IBinder binder = connection.asBinder();
//结果binder =android.os.BinderProxy@9df6dc7
......//根据binder查找到的ServiceRecord，加入到各种组件的connections变量中
//设置了该flag-BIND_AUTO_CREATE
if ((flags&Context.BIND_AUTO_CREATE) != 0) {
s.lastActivity = SystemClock.uptimeMillis();
//!!!关键函数bringUpServiceLocked，正常结果会返回null
if (bringUpServiceLocked(s, service.getFlags(), callerFg, false,
permissionsReviewRequired) != null) {
return 0;
}
}
if (s.app != null) {
if ((flags&Context.BIND_TREAT_LIKE_ACTIVITY) != 0) {
s.app.treatLikeActivity = true;
}
if (s.whitelistManager) {
s.app.whitelistManager = true;
}
// This could have made the service more important.
mAm.updateLruProcessLocked(s.app, s.app.hasClientActivities
|| s.app.treatLikeActivity, b.client);
mAm.updateOomAdjLocked(s.app, true);
}
//其中s.app=ProcessRecord{232a306 2264:com.example.atc6111.testdymamicreceiver/u0a59}
//其中b.intent.received = false
if (s.app != null && b.intent.received) {
......//代码不执行
} else if (!b.intent.requested) { 
requestServiceBindingLocked(s, b.intent, callerFg, false);
}
getServiceMapLocked(s.userId).ensureNotStartingBackgroundLocked(s);
} finally {
Binder.restoreCallingIdentity(origId);
}
return 1;
}

private String bringUpServiceLocked(ServiceRecord r, int intentFlags, boolean execInFg,
boolean whileRestarting, boolean permissionsReviewRequired)
throws TransactionTooLargeException {
//其中r.app = null，第一次调用bindService时该值为null，在绑定之后再调用就不为null
if (r.app != null && r.app.thread != null) { //代码不执行
sendServiceArgsLocked(r, execInFg, false);
return null;
}
if (!whileRestarting && mRestartingServices.contains(r)) {//代码不执行
// If waiting for a restart, then do nothing.
return null;
}
//在创建服务前的准备工作：
//1. 从mPendingService中把这个ServiceRecord移除
//2. 判断拥有此服务的user是否已经启动
//3. 设置Service所在的package的停止状态为false
...... 
final boolean isolated = (r.serviceInfo.flags&ServiceInfo.FLAG_ISOLATED_PROCESS) != 0;
//没有将service的isolatedProcess属性设置为true，所以isolated = false
final String procName = r.processName;
String hostingType = "service";
ProcessRecord app;
if (!isolated) {
app = mAm.getProcessRecordLocked(procName, r.appInfo.uid, false);
//其中app=ProcessRecord{232a306 2264:com.example.maureen.testdymamicreceiver/u0a59}
//其中app.thread=android.app.IApplicationThread$Stub$Proxy@e77d31d
if (app != null && app.thread != null) {
try {
app.addPackage(r.appInfo.packageName, r.appInfo.versionCode, mAm.mProcessStats);
//【关键函数！！！】执行Service的onCreate的过程
realStartServiceLocked(r, app, execInFg);
return null; //执行成功这个函数就直接返回null
} catch (TransactionTooLargeException e) {
throw e;
} catch (RemoteException e) {
Slog.w(TAG, "Exception when starting service " + r.shortName, e);
}
}
} else { //不会执行
...
}
//成功执行realStartServiceLocked后，就直接返回，后面的代码都不会执行了!!!!!
......
return null;
}

private final void realStartServiceLocked(ServiceRecord r,
ProcessRecord app, boolean execInFg) throws RemoteException {
if (app.thread == null) {
throw new RemoteException();
}
r.app = app;
r.restartTime = r.lastActivity = SystemClock.uptimeMillis();
final boolean newService = app.services.add(r);
//设置超时消息
bumpServiceExecutingLocked(r, execInFg, "create");
mAm.updateLruProcessLocked(app, false, null);
updateServiceForegroundLocked(r.app, /* oomAdj= */ false);
//更新OOM
mAm.updateOomAdjLocked();
boolean created = false;
try {
synchronized (r.stats.getBatteryStats()) {
r.stats.startLaunchedLocked();
}
mAm.notifyPackageUse(r.serviceInfo.packageName,
PackageManager.NOTIFY_PACKAGE_USE_SERVICE);
app.forceProcessStateUpTo(ActivityManager.PROCESS_STATE_SERVICE);
//!!!【关键函数】异步调用ApplicationThread.scheduleCreateService
//因为是异步调用，所以不用等返回结果就可以继续往下执行
app.thread.scheduleCreateService(r, r.serviceInfo,
mAm.compatibilityInfoForPackageLocked(r.serviceInfo.applicationInfo),
app.repProcState);
r.postNotification();
created = true;
} catch (DeadObjectException e) {
Slog.w(TAG, "Application dead when creating service " + r);
mAm.appDiedLocked(app);
throw e;
} finally {
if (!created) {
// Keep the executeNesting count accurate.
final boolean inDestroying = mDestroyingServices.contains(r);
serviceDoneExecutingLocked(r, inDestroying, inDestroying);
// Cleanup.
if (newService) {
app.services.remove(r);
r.app = null;
}
// Retry.
if (!inDestroying) {
scheduleServiceRestartLocked(r, false);
}
}
}
if (r.whitelistManager) {
app.whitelistManager = true;
}
//【又一个关键函数！】Service的onStartCommand调用过程
requestServiceBindingsLocked(r, execInFg);
updateServiceClientActivitiesLocked(app, null, true);
if (r.startRequested && r.callStart && r.pendingStarts.size() == 0) {
r.pendingStarts.add(new ServiceRecord.StartItem(r, false, r.makeNextStartId(),
null, null, 0));
}
//这个函数进入之后，N = 0，所以直接返回了
sendServiceArgsLocked(r, execInFg, true);
if (r.delayed) {
getServiceMapLocked(r.userId).mDelayedStartList.remove(r);
r.delayed = false;
}
if (r.delayedStop) {
// Oh and hey we've already been asked to stop!
r.delayedStop = false;
if (r.startRequested) {
if (DEBUG_DELAYED_STARTS) Slog.v(TAG_SERVICE,
"Applying delayed stop (from start): " + r);
stopServiceLocked(r);
}
}
}

    public final void scheduleCreateService(IBinder token,
ServiceInfo info, CompatibilityInfo compatInfo, int processState) {
updateProcessState(processState, false);
CreateServiceData s = new CreateServiceData();
s.token = token;
s.info = info;
s.compatInfo = compatInfo;
sendMessage(H.CREATE_SERVICE, s);
}

    final H mH = new H();    
private void sendMessage(int what, Object obj) {
sendMessage(what, obj, 0, 0, false);
}
private void sendMessage(int what, Object obj, int arg1, int arg2, boolean async) {
Message msg = Message.obtain();
msg.what = what;
msg.obj = obj;
msg.arg1 = arg1;
msg.arg2 = arg2;
if (async) {
msg.setAsynchronous(true);
}
mH.sendMessage(msg);
}

public void handleMessage(Message msg) {
switch (msg.what) {
...
case CREATE_SERVICE:
Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, ("serviceCreate: " + String.valueOf(msg.obj)));
handleCreateService((CreateServiceData)msg.obj);
Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
break;
...
}
}

private void handleCreateService(CreateServiceData data) {
unscheduleGcIdler();
LoadedApk packageInfo = getPackageInfoNoCheck(
data.info.applicationInfo, data.compatInfo);
Service service = null;
try {
java.lang.ClassLoader cl = packageInfo.getClassLoader();
service = (Service) cl.loadClass(data.info.name).newInstance();
} catch (Exception e) {
if (!mInstrumentation.onException(service, e)) {
throw new RuntimeException(
"Unable to instantiate service " + data.info.name
+ ": " + e.toString(), e);
}
}
try {
ContextImpl context = ContextImpl.createAppContext(this, packageInfo);
context.setOuterContext(service);
Application app = packageInfo.makeApplication(false, mInstrumentation);
service.attach(context, this, data.info.name, data.token, app,
ActivityManager.getService());
//调用自定义Service的onCreate函数
service.onCreate(); 
mServices.put(data.token, service);
try {
//【重要！！！】通知AMS， onCreate函数执行完成
ActivityManager.getService().serviceDoneExecuting(
data.token, SERVICE_DONE_EXECUTING_ANON, 0, 0);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
} catch (Exception e) {
if (!mInstrumentation.onException(service, e)) {
throw new RuntimeException(
"Unable to create service " + data.info.name
+ ": " + e.toString(), e);
}
}
}

public void serviceDoneExecuting(IBinder token, int type, int startId, int res) {
synchronized(this) {
if (!(token instanceof ServiceRecord)) {
Slog.e(TAG, "serviceDoneExecuting: Invalid service token=" + token);
throw new IllegalArgumentException("Invalid service token");
}
//调用ActiveServices的serviceDoneExecutingLocked函数
mServices.serviceDoneExecutingLocked((ServiceRecord)token, type, startId, res);
}
}

void serviceDoneExecutingLocked(ServiceRecord r, int type, int startId, int res) {
boolean inDestroying = mDestroyingServices.contains(r);
if (r != null) {
if (type == ActivityThread.SERVICE_DONE_EXECUTING_START) { //不会执行
//startService的onStartCommand之后才会type为SERVICE_DONE_EXECUTING_START
r.callStart = true;
switch (res) { //根据onStartCommand的返回值做的不同处理
case Service.START_STICKY_COMPATIBILITY:
case Service.START_STICKY: {
.....
break;
}
case Service.START_NOT_STICK: {
......
break;
}
case Service.START_REDELIVER_INTENT: {
......
break;
}
case Service.START_TASK_REMOVED_COMPLETE: {
.....
break;
}
default:
throw new IllegalArgumentException(
"Unknown service start result: " + res);
}
if (res == Service.START_STICKY_COMPATIBILITY) {
r.callStart = false;
}
} else if (type == ActivityThread.SERVICE_DONE_EXECUTING_STOP) {//不会执行
......
}
final long origId = Binder.clearCallingIdentity();
//执行这个函数
serviceDoneExecutingLocked(r, inDestroying, inDestroying);
Binder.restoreCallingIdentity(origId);
} else {
Slog.w(TAG, "Done executing unknown service from pid "
+ Binder.getCallingPid());
}
}

private void serviceDoneExecutingLocked(ServiceRecord r, boolean inDestroying,
boolean finishing) {
r.executeNesting--;
if (r.executeNesting <= 0) {
if (r.app != null) {
r.app.execServicesFg = false;
r.app.executingServices.remove(r);
if (r.app.executingServices.size() == 0) {
//移除之前在bumpxxx函数设置的超时消息                    
mAm.mHandler.removeMessages(ActivityManagerService.SERVICE_TIMEOUT_MSG, r.app);
} else if (r.executeFg) {
for (int i=r.app.executingServices.size()-1; i>=0; i--) {
if (r.app.executingServices.valueAt(i).executeFg) {
r.app.execServicesFg = true;
break;
}
}
}
if (inDestroying) { 
mDestroyingServices.remove(r);
r.bindings.clear();
}
mAm.updateOomAdjLocked(r.app, true);
}
r.executeFg = false;
if (r.tracker != null) {
r.tracker.setExecuting(false, mAm.mProcessStats.getMemFactorLocked(),
SystemClock.uptimeMillis());
if (finishing) {
r.tracker.clearCurrentOwner(r, false);
r.tracker = null;
}
}
if (finishing) {
if (r.app != null && !r.app.persistent) {
r.app.services.remove(r);
if (r.whitelistManager) {
updateWhitelistManagerLocked(r.app);
}
}
r.app = null;
}
}
}

    private final void requestServiceBindingsLocked(ServiceRecord r, boolean execInFg)
throws TransactionTooLargeException {
//其中r.bindings.size() = 1
for (int i=r.bindings.size()-1; i>=0; i--) {
IntentBindRecord ibr = r.bindings.valueAt(i);
if (!requestServiceBindingLocked(r, ibr, execInFg, false)) {
break;
}
}
}

private final boolean requestServiceBindingLocked(ServiceRecord r, IntentBindRecord i,
boolean execInFg, boolean rebind) throws TransactionTooLargeException {
if (r.app == null || r.app.thread == null) {
// If service is not currently running, can't yet bind.
return false;
}
//其中i.requested = false，i.apps.size() = 1
if ((!i.requested || rebind) && i.apps.size() > 0) {
try {
//设置超时消息
bumpServiceExecutingLocked(r, execInFg, "bind");
r.app.forceProcessStateUpTo(ActivityManager.PROCESS_STATE_SERVICE);
//【重要！！】异步调用ApplicationThread.scheduleBindService
r.app.thread.scheduleBindService(r, i.intent.getIntent(), rebind,
r.app.repProcState);
if (!rebind) {
i.requested = true;
}
i.hasBound = true;
i.doRebind = false;
} catch (TransactionTooLargeException e) {
// Keep the executeNesting count accurate.
if (DEBUG_SERVICE) Slog.v(TAG_SERVICE, "Crashed while binding " + r, e);
final boolean inDestroying = mDestroyingServices.contains(r);
serviceDoneExecutingLocked(r, inDestroying, inDestroying);
throw e;
} catch (RemoteException e) {
if (DEBUG_SERVICE) Slog.v(TAG_SERVICE, "Crashed while binding " + r);
// Keep the executeNesting count accurate.
final boolean inDestroying = mDestroyingServices.contains(r);
serviceDoneExecutingLocked(r, inDestroying, inDestroying);
return false;
}
}
return true;
}

    public final void scheduleBindService(IBinder token, Intent intent,
boolean rebind, int processState) {
updateProcessState(processState, false);
BindServiceData s = new BindServiceData();
s.token = token;
s.intent = intent;
s.rebind = rebind;
sendMessage(H.BIND_SERVICE, s);
}

    final H mH = new H();    
private void sendMessage(int what, Object obj) {
sendMessage(what, obj, 0, 0, false);
}
private void sendMessage(int what, Object obj, int arg1, int arg2, boolean async) {
Message msg = Message.obtain();
msg.what = what;
msg.obj = obj;
msg.arg1 = arg1;
msg.arg2 = arg2;
if (async) {
msg.setAsynchronous(true);
}
mH.sendMessage(msg);
}

public void handleMessage(Message msg) {
switch (msg.what) {
...
case BIND_SERVICE:
Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "serviceBind");
handleBindService((BindServiceData)msg.obj);
Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
break;
...
}
}

private void handleBindService(BindServiceData data) {
Service s = mServices.get(data.token);
if (s != null) {
try {
data.intent.setExtrasClassLoader(s.getClassLoader());
data.intent.prepareToEnterProcess();
try {
if (!data.rebind) {
//调用自定义Service的onBind函数
IBinder binder = s.onBind(data.intent);
//发布服务，即是onServiceConnected的流程
ActivityManager.getService().publishService(
data.token, data.intent, binder);
} else {
s.onRebind(data.intent);
ActivityManager.getService().serviceDoneExecuting(
data.token, SERVICE_DONE_EXECUTING_ANON, 0, 0);
}
ensureJitEnabled();
} catch (RemoteException ex) {
throw ex.rethrowFromSystemServer();
}
} catch (Exception e) {
if (!mInstrumentation.onException(s, e)) {
throw new RuntimeException(
"Unable to bind to service " + s
+ " with " + data.intent + ": " + e.toString(), e);
}
}
}
}

   public void publishService(IBinder token, Intent intent, IBinder service) {
if (intent != null && intent.hasFileDescriptors() == true) {
throw new IllegalArgumentException("File descriptors passed in Intent");
}
synchronized(this) {
if (!(token instanceof ServiceRecord)) {
throw new IllegalArgumentException("Invalid service token");
}
//调用ActiveServices的publishServiceLocked
mServices.publishServiceLocked((ServiceRecord)token, intent, service);
}
}

void publishServiceLocked(ServiceRecord r, Intent intent, IBinder service) {
final long origId = Binder.clearCallingIdentity();
try {
if (r != null) {
Intent.FilterComparison filter
= new Intent.FilterComparison(intent);
IntentBindRecord b = r.bindings.get(filter);
if (b != null && !b.received) {
b.binder = service;
b.requested = true;
b.received = true;
for (int conni=r.connections.size()-1; conni>=0; conni--) {
ArrayList<ConnectionRecord> clist = r.connections.valueAt(conni);
for (int i=0; i<clist.size(); i++) {
ConnectionRecord c = clist.get(i);
if (!filter.equals(c.binding.intent.intent)) { 
continue;
}
try {
//【重要！！】异步调用LoadedApk.ServiceDispatcher.InnerConnection.connected
c.conn.connected(r.name, service, false);
} catch (Exception e) {
Slog.w(TAG, "Failure sending service " + r.name +
" to connection " + c.conn.asBinder() +
" (in " + c.binding.client.processName + ")", e);
}
}
}
}
//处理完后，调用serviceDoneExecutingLocked移除之前设置的超时消息
serviceDoneExecutingLocked(r, mDestroyingServices.contains(r), false);
}
} finally {
Binder.restoreCallingIdentity(origId);
}
}

    private static class InnerConnection extends IServiceConnection.Stub {
//避免内存泄漏，使用弱引用
final WeakReference<LoadedApk.ServiceDispatcher> mDispatcher;
InnerConnection(LoadedApk.ServiceDispatcher sd) {
mDispatcher = new WeakReference<LoadedApk.ServiceDispatcher>(sd);
}
public void connected(ComponentName name, IBinder service, boolean dead)
throws RemoteException {
LoadedApk.ServiceDispatcher sd = mDispatcher.get();
if (sd != null) {
//调用LoadedApk.ServiceDispatcher的connected函数
sd.connected(name, service, dead);
}
}
}

    public void connected(ComponentName name, IBinder service, boolean dead) {
//其中mActivityThread = Handler (android.app.ActivityThread$H) {5685769}
if (mActivityThread != null) {
mActivityThread.post(new RunConnection(name, service, 0, dead));
} else {
doConnected(name, service, dead);
}
}

            public void run() {
//其中mCommand=0
if (mCommand == 0) {
doConnected(mName, mService, mDead);
} else if (mCommand == 1) {
doDeath(mName, mService);
}
}

//LoadedApk.ServiceDispatcher类中的成员函数
public void doConnected(ComponentName name, IBinder service, boolean dead) {
ServiceDispatcher.ConnectionInfo old;
ServiceDispatcher.ConnectionInfo info;
synchronized (this) {
if (mForgotten) {
// We unbound before receiving the connection; ignore
// any connection received.
return;
}
old = mActiveConnections.get(name);
if (old != null && old.binder == service) {
// Huh, already have this one.  Oh well!
return;
}
if (service != null) {
// A new service is being connected... set it all up.
info = new ConnectionInfo();
info.binder = service;
info.deathMonitor = new DeathMonitor(name, service);
try {
service.linkToDeath(info.deathMonitor, 0);
mActiveConnections.put(name, info);
} catch (RemoteException e) {
// This service was dead before we got it...  just
// don't do anything with it.
mActiveConnections.remove(name);
return;
}
} else {
// The named service is being disconnected... clean up.
mActiveConnections.remove(name);
}
if (old != null) {
old.binder.unlinkToDeath(old.deathMonitor, 0);
}
}
//其中old=null，dead=false，
//service=com.example.testdymamicreceiver.TestService$ServiceBinder@fc085f0
if (old != null) {
mConnection.onServiceDisconnected(name);
}
if (dead) {
mConnection.onBindingDied(name);
}
if (service != null) {
//调用bindService时传入的ServiceConnection的onServiceConnected函数
mConnection.onServiceConnected(name, service);
}
}