Android L 5.0 MT流程 代码

转载请注明出处： http://blog.youkuaiyun.com/aaa111/article/details/43866909

1. --------
2. 写在前：本人新手有理解不准确或者错误的地方请大家指正出来，我好及时修改
3. -----
4. ---我理解的来电流程大概分为6个部分--
5. 注：1>2>3并不是只步骤，是指经过的第1>2>3个类。

① 1>2>3 RIL>GSMPhone      

    状态变化>发出来电通知

② 4>5>6>7>8>9 PstnIncomingCallNotifier>Call    

    接收到通知>准备创建连接

③ 10>11>12>13CreateConnectionProcesser> ConnectionServices 

    开始创建连接>创建连接完成。

④ 14>11>9>>8 ConnectionServicesAdapter>CallsManager

    处理这个创建的 连接>成功来电

⑤ 8>15>16>17     CallsManager>Phone

    成功来电>准备启动界面

⑥ 18>19>20>21>22 CallList>StatubarNotifier

    开始启动界面 显示来电

----

framwork

①  RIL>GSMPhone    Call状态变化 -> 发出来电通知

1. 0. Modem发出Call状态变化的通知，
   
2. 
   
3. 
   
   1. framwork/opt/telephony/.../RIL.java
   
   1.1.RIL接收到RIL_UNSOL_RESPONSE_CALL_STATE_CHANGED消息
   

1. 1.2.然后经由mCallStateRegistrants.notifyRegistrants发出通知（RegistrantList消息处理机制此处不做具体说明）。


2. 1. private void processUnsolicited (Parcel p) {
   2. ...
   3. switch(response) {
   4. ...
   5. case RIL_UNSOL_RESPONSE_CALL_STATE_CHANGED:
   6.                 if (RILJ_LOGD) unsljLog(response);
   7.                 mCallStateRegistrants.notifyRegistrants(new AsyncResult(null, null, null));

BaseCommands.java registerForCallStateChanged()  mCallStateRegistrants.add(r);

注册为观察者（android源码中大量用到观察者模式，或者叫RegistrantList消息处理机制）。

1.  @Override
2.     public void registerForCallStateChanged(Handler h, int what, Object obj) {
3.         Registrant r = new Registrant (h, what, obj);
4. //添加到观察者列表
5.         mCallStateRegistrants.add(r);
6.     }

2. framwork/opt/telephony/...GSMCallTracker.java

2.1查找察者被调用的地方（AS中的快捷键Ctrl+Alt+H）， 两处被响应处理处理，其中一处：GSMCallTracker handleMessage

1. ...//registerForCallStateChanged调用
2. mCi.registerForCallStateChanged(this, EVENT_CALL_STATE_CHANGE, null);
3. ...
4. @Override
5. public void
6. //响应处理
7. handleMessage (Message msg) {
8. ...
9. case EVENT_CALL_STATE_CHANGE:
10. //调用父类CallTracker查询Call List方法
11.      pollCallsWhenSafe();
12. break;

2.1.1. pollCallsWhenSafe()方法在CallTracker.java中实现

1. protected void pollCallsWhenSafe() {
2. mNeedsPoll = true;
3. 
   
4. if (checkNoOperationsPending()) {
5. mLastRelevantPoll = obtainMessage(EVENT_POLL_CALLS_RESULT);
6. mCi.getCurrentCalls(mLastRelevantPoll);//RIL.java中的getCurrentCalls方法
7. }
8. }

2.1.2 回到RIL.java   getCurrentCalls  将 RIL_REQUEST_GET_CURRENT_CALLS 消息封装成 RILRequest 类型并发送。

此处 result为 EVENT_POLL_CALLS_RESULT，所以后 面 GSMCallTracker 中 hand lemessage响应的是这个消息。

1. @Override
2. public void
3. getCurrentCalls (Message result) {
4. RILRequest rr = RILRequest.obtain(RIL_REQUEST_GET_CURRENT_CALLS, result);
6. if (RILJ_LOGD) riljLog(rr.serialString() + "> " + requestToString(rr.mRequest));
8. send(rr);
9. }

2.2 RIL.java 有三处接收处理 RIL_REQUEST_GET_CURRENT_CALLS 消息，真正的逻辑处理在processSolicited方法

1. private RILRequest processSolicited (Parcel p) {
2. ...
3. case RIL_REQUEST_GET_CURRENT_CALLS: ret =  responseCallList(p); break;
4. ...
5. if (rr.mResult != null) {
6.                     AsyncResult.forMessage(rr.mResult, null, tr);
7.                     rr.mResult.sendToTarget();//发出handler消息通知
8.                 }

2.3 回到framworks/opt/telephony/.../telephony/gsm/GSMCallTracker.java

rr . mResult . sendToTarget ()发出handler消息通知后， handleMessage方法中响应消息“ EVENT_POLL_CALLS_RESULT"，这个消息是在  pollCallsWhenSafe中封装的。

1. @Override
2. public void
3. handleMessage (Message msg) {
4. ...
5.  case EVENT_POLL_CALLS_RESULT:
6.                 ar = (AsyncResult)msg.obj;
8.                 if (msg == mLastRelevantPoll) {
9.                     if (DBG_POLL) log(
10.                             "handle EVENT_POLL_CALL_RESULT: set needsPoll=F");
11.                     mNeedsPoll = false;
12.                     mLastRelevantPoll = null;
13.                     handlePollCalls((AsyncResult)msg.obj);
14.                 }
15.             break;

handlePollCalls方法根据RIL发出的Call List对象判断Call的状态，并发出不同的通知，

1） 新来电的通知是： phone. notifyNewRingingConnection; 

1. handlePollCalls（）{
2. ...
3. if (newRinging != null) {
4. mPhone.notifyNewRingingConnection(newRinging);
5. }

另外两个是 

2) 通话断开通知 onDisconnected；

3) Call状态变化通知 phone.notifiyPreciseCallStateChanged.

来电的时候发出的是phone.notifyNewRingConnection通知，进入到notifyNewRingConnection方法

3. framworks/opt/telephony/.../telephony/gsm/GSMPhone.java

1.  public void notifyNewRingingConnection(Connection c) {
2.         super.notifyNewRingingConnectionP(c);
3.     }

调用父类   PhoneBase.java 

notifyNewRingingConnectionP() 发出来电通知 mNewRingingConnectionRegistrants.notifyRegistrants(ar);

1. /**
2.      * Notify registrants of a new ringing Connection.
3.      * Subclasses of Phone probably want to replace this with a
4.      * version scoped to their packages
5.      */
6.     public void notifyNewRingingConnectionP(Connection cn) {
7.         if (!mIsVoiceCapable)
8.             return;
9.         AsyncResult ar = new AsyncResult(null, cn, null);
10.         mNewRingingConnectionRegistrants.notifyRegistrants(ar);
11.     }

RegistrantList.java

1. public /*synchronized*/ void
2. notifyRegistrants(AsyncResult ar)
3. {
4. internalNotifyRegistrants(ar.result, ar.exception);
5. }

1. private synchronized void
2. internalNotifyRegistrants (Object result, Throwable exception)
3. {
4. for (int i = 0, s = registrants.size(); i < s ; i++) {
5. Registrant r = (Registrant) registrants.get(i);
6. r.internalNotifyRegistrant(result, exception);
7. }
8. }

1. /*package*/ void
2. internalNotifyRegistrant (Object result, Throwable exception)
3. {
4. Handler h = getHandler();
6. if (h == null) {
7. clear();
8. } else {
9. Message msg = Message.obtain();
11. msg.what = what;
13. msg.obj = new AsyncResult(userObj, result, exception);
15. h.sendMessage(msg);
16. }
17. }

 

注册为观察者的方法为：

1. // Inherited documentation suffices.
2. @Override
3. public void registerForNewRingingConnection(
4. Handler h, int what, Object obj) {
5. checkCorrectThread(h);
6. 
   
7. mNewRingingConnectionRegistrants.addUnique(h, what, obj);
8. }

registerForNewRingingConnection这个方法在4个地方被调用，即有4个地方关心是否有新来电的变化。

     1.packages/servicesTelephony/.../PstnIncomingCallNotifier.java   log：  D/Telephony( 1396): PstnIncomingCallNotifier: handleNewRingingConnection

     2.framworks/opt/telephony/.../PhoneProxy.java 

     3.framworks/opt/telephony/test/.../GSMPhoneTEST.java

     4.framworks/opt/telephony/.../telephony/CallManager.java 5.0之前是这里处理，新版本由PstnIncomingCallNotifier处理

----------------

前面：RIL发出Call状态变化消息通知，GSMPhone发出来电通知

----------------

Telephony

② PstnIncomingCallNotifier>Call  接收Framework层到通知>准备创建连接

4. packages/services/Telephony/.../PstnIncomingCallNotifier.java

registerForNotifications方法调用 registerForNewRingingConnection

4.1 调用 Phonebase中 不同的方法，注册为观察者。

翻译（不通顺 =_=）：

我们应当直接跟phoneProxy做交互处理。然而phoneProxy直接与CallManager交互处理， 我们要么监听callmanager，要么就像这样参与到proxy中去。

两种都是不可取的，如果这个类和callmanager能够 register generically with the phone proxy instead ，这会比较好。

或者更好的是只是直接注册通知 with phone proxy， 而不用担心技术的改变，这需要改变opt/telephony中的代码。

/**

* Register for notifications from the base phone.

* TODO: We should only need to interact with the phoneproxy directly. However,

* since the phoneproxy only interacts directly with CallManager we either listen to callmanager

* or we have to poke into the proxy like this. Neither is desirable. It would be better if

* this class and callManager could register generically with the phone proxy instead and get

* radio techonology changes directly. Or better yet, just register for the notifications

* directly with phone proxy and never worry about the technology changes. This requires a

* change in opt/telephony code.

*/

private void registerForNotifications() {

Phone newPhone = mPhoneProxy.getActivePhone();

if (newPhone != mPhoneBase) {

unregisterForNotifications();

 

if (newPhone != null) {

Log.i(this, "Registering: %s", newPhone);

mPhoneBase = newPhone;

//调用 registerForNewRingingConnection方法

mPhoneBase.registerForNewRingingConnection(

mHandler, EVENT_NEW_RINGING_CONNECTION, null);

mPhoneBase.registerForCallWaiting(

mHandler, EVENT_CDMA_CALL_WAITING, null);

mPhoneBase.registerForUnknownConnection(mHandler, EVENT_UNKNOWN_CONNECTION,

null);

}

}

}

4.2 handle 处理EVENT_NEW_RINGING_CONNECTION消息

private final Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) {

          ...

                case EVENT_NEW_RINGING_CONNECTION :

                    handleNewRingingConnection((AsyncResult) msg.obj);

                    break;

4.2.1 handleNewRingingConnection方法，处理新的来电连接。

此处对应的log为：

D/Telephony( 1396): PstnIncomingCallNotifier:  handleNewRingingConnection

/**

* Verifies the incoming call and triggers sending the incoming-call intent to Telecom.

*

* @param asyncResult The result object from the new ringing event.

*/

private void handleNewRingingConnection(AsyncResult asyncResult) {

Log.d(this, "handleNewRingingConnection");

Connection connection = (Connection) asyncResult.result;

if (connection != null) {

Call call = connection.getCall();

 

// Final verification of the ringing state before sending the intent to Telecom.

//在发送intent到Telecom之前最后一次验证ringing 状态

if (call != null && call.getState().isRinging()) {

sendIncomingCallIntent(connection);

}

}

}

4.2.2 sendIncomingCallIntent方法

发送incoming call intent到telecom，发送的Connection 类型，里面包括isIncoming getState isRinging等

    /**

* Sends the incoming call intent to telecom.

*/

private void sendIncomingCallIntent(Connection connection) {

Bundle extras = null;

if (connection.getNumberPresentation() == TelecomManager.PRESENTATION_ALLOWED &&

!TextUtils.isEmpty(connection.getAddress())) {

extras = new Bundle();

Uri uri = Uri.fromParts(PhoneAccount.SCHEME_TEL, connection.getAddress(), null);

extras.putParcelable(TelephonyManager.EXTRA_INCOMING_NUMBER, uri);

}

TelecomManager.from(mPhoneProxy.getContext()).addNewIncomingCall(

TelecomAccountRegistry.makePstnPhoneAccountHandle(mPhoneProxy), extras);

}

addNewIncomingCall()定义在：  framworks/base/ telecomm /java/android/telecom/ TelecomManager.java   

TelecomManager的功能则主要是对TelecomService提供的远程接口的封装，然后提供给应用使用。

 addNewIncomingCall方法   @SystemApi

来电时触发此方法

/**

* Registers a new incoming call. A {@link ConnectionService} should invoke this method when it

* has an incoming call. The specified {@link PhoneAccountHandle？_？} must have been registered

* with {@link #registerPhoneAccount}. Once invoked, this method will cause the system to bind

* to the {@link ConnectionService} associated with the {@link PhoneAccountHandle} and request

* additional information about the call (See

* {@link ConnectionService#onCreateIncomingConnection}) before starting the incoming call UI.

*

* @param phoneAccount A {@link PhoneAccountHandle} registered with

* {@link #registerPhoneAccount}.

* @param extras A bundle that will be passed through to

* {@link ConnectionService#onCreateIncomingConnection}.

* @hide

*/

@SystemApi

public void addNewIncomingCall(PhoneAccountHandle phoneAccount, Bundle extras) {

try {

if (isServiceConnected()) {

getTelecomService().addNewIncomingCall(

phoneAccount, extras == null ? new Bundle() : extras);

}

} catch (RemoteException e) {

Log.e(TAG, "RemoteException adding a new incoming call: " + phoneAccount, e);

}

}

addNewIncomingCall 的具体实现

Telecomm

5. packages/services/Telecomm/src/com/android/server/telecom/TelecomServiceImpl.java

继承自ITelecomService，TelecomService的接口由TeleComManager封装，并其供给应用使用，

5.1

@Override

addNewIncomingCall

新建intent 设定intent 的ACTION 、addFalgs等

1. public static final String ACTION_INCOMING_CALL = "android.telecom.action.INCOMING_CALL";
2. ...
3. /**
4. * @see android.telecom.TelecomManager#addNewIncomingCall
5. */
6. @Override
7. public void addNewIncomingCall(PhoneAccountHandle phoneAccountHandle, Bundle extras) {
8. if (phoneAccountHandle != null && phoneAccountHandle.getComponentName() != null) {
9. mAppOpsManager.checkPackage(
10. Binder.getCallingUid(), phoneAccountHandle.getComponentName().getPackageName());
11. 
    
12. Intent intent = new Intent(TelecomManager.ACTION_INCOMING_CALL);
13. intent.setPackage(mContext.getPackageName());
14. intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
15. intent.putExtra(TelecomManager.EXTRA_PHONE_ACCOUNT_HANDLE, phoneAccountHandle);
16. if (extras != null) {
17. intent.putExtra(TelecomManager.EXTRA_INCOMING_CALL_EXTRAS, extras);
18. }
19. 
    
20. long token = Binder.clearCallingIdentity();
21. //启动Activity
22. mContext.startActivityAsUser(intent, UserHandle.CURRENT);
23. Binder.restoreCallingIdentity(token);
24. }
25. }

//启动  CallActivity  对应的log：

I/ActivityManager(  852): START u0 {act=android.telecom.action.INCOMING_CALL flg=0x10000000 pkg=com.android.server.telecom cmp=com.android.server.telecom/.IncomingCallActivity (has extras)

} from uid 1001 on display 0

// packages / services / Telecomm / AndroidManifest.xml 中

183<activity-alias android:name="IncomingCallActivity"184                android:targetActivity="CallActivity"185                android:exported="true">
186            <intent-filter>
187                <action android:name="android.telecom.action.INCOMING_CALL" />
188                <category android:name="android.intent.category.DEFAULT" />
189            </intent-filter>
190        </activity-alias>

6. packages/services/Telecomm/src/com/android/server/telecom/ CallActivity.java

6.1 执行完processIntent()后就finish()，对应的log

D/Telecom ( 1376): CallActivity:  onCreate: end

public class CallActivity extends Activity {

 

@Override

protected void onCreate(Bundle bundle) {

super.onCreate(bundle);

 

// TODO: Figure out if there is something to restore from bundle.

// See OutgoingCallBroadcaster in services/Telephony for more.

 

processIntent(getIntent());

 

// This activity does not have associated UI, so close.

finish();

Log.d(this, "onCreate: end");

}

6.1.1  processIntent 判断action

/**

* Processes intents sent to the activity.

*

* @param intent The intent.

*/

private void processIntent(Intent intent) {

// Ensure call intents are not processed on devices that are not capable of calling.

if (!isVoiceCapable()) {

return;

}

 

verifyCallAction(intent);

String action = intent.getAction();

 

if (Intent.ACTION_CALL.equals(action) ||

Intent.ACTION_CALL_PRIVILEGED.equals(action) ||

Intent.ACTION_CALL_EMERGENCY.equals(action)) {

processOutgoingCallIntent(intent);

} else if (TelecomManager.ACTION_INCOMING_CALL.equals(action)) {

processIncomingCallIntent(intent);

}

}

6.1.2  processIncomingCallIntent

private void processIncomingCallIntent(Intent intent) {

if (UserHandle.myUserId() == UserHandle.USER_OWNER) {

               CallReceiver . processIncomingCallIntent ( intent );

} else {

sendBroadcastToReceiver(intent, true /* isIncoming */);

}

}

7. packages/services/Telecomm/src/com/android/server/telecom/CallReceiver.java

7.1 对应log

D/Telecom ( 1376): com.android.server.telecom.CallReceiver: Processing incoming call from connection service [ComponentInfo{com.android.phone/com.android.services.telephony.TelephonyConnectionService}]

static void processIncomingCallIntent(Intent intent) {

PhoneAccountHandle phoneAccountHandle = intent.getParcelableExtra(

TelecomManager.EXTRA_PHONE_ACCOUNT_HANDLE);

 

if (phoneAccountHandle == null) {

Log.w(TAG, "Rejecting incoming call due to null phone account");

return;

}

if (phoneAccountHandle.getComponentName() == null) {

Log.w(TAG, "Rejecting incoming call due to null component name");

return;

}

 

Bundle clientExtras = null;

if (intent.hasExtra(TelecomManager.EXTRA_INCOMING_CALL_EXTRAS)) {

clientExtras = intent.getBundleExtra(TelecomManager.EXTRA_INCOMING_CALL_EXTRAS);

}

if (clientExtras == null) {

clientExtras = Bundle.EMPTY;

}

 

Log.d(TAG, "Processing incoming call from connection service [%s]",

phoneAccountHandle.getComponentName());

getCallsManager().processIncomingCallIntent(phoneAccountHandle, clientExtras);

}

8. packages/services/Telecomm/src/com/android/server/telecom/CallsManager.java

8.1 processIncomingCallIntent

D/Telecom ( 1376): CallsManager: processIncomingCallIntent

new一个Call 对象 把前面的参数传进来，然后调用call中建立连接的方法 startCreateConnection

    /**

     * 开始把call attach到connection services

     *

     * @param phoneAccountHandle The phone account which contains the component name of the

     *        connection service to use for this call.

     * @param extras The optional extras Bundle passed with the intent used for the incoming call.

     */

1. /**
2. * Starts the process to attach the call to a connection service.
3. *
4. * @param phoneAccountHandle The phone account which contains the component name of the
5. * connection service to use for this call.
6. * @param extras The optional extras Bundle passed with the intent used for the incoming call.
7. */
8. void processIncomingCallIntent(PhoneAccountHandle phoneAccountHandle, Bundle extras) {
9. Log.d(this, "processIncomingCallIntent");
10. Uri handle = extras.getParcelable(TelephonyManager.EXTRA_INCOMING_NUMBER);
11. Call call = new Call(
12. mContext,
13. mConnectionServiceRepository,
14. handle,
15. null /* gatewayInfo */,
16. null /* connectionManagerPhoneAccount */,
17. phoneAccountHandle,
18. true /* isIncoming */,
19. false /* isConference */);
21. call.setExtras(extras);
22. // TODO: Move this to be a part of addCall()
23. call.addListener(this);
24. call.startCreateConnection(mPhoneAccountRegistrar);
25. }

④ 14>11>9>>8 ConnectionServicesAdapter>CallsManager

    处理这个创建的连接>成功来电

⑤ 8>15>16>17     CallsManager>Phone

    成功来电>准备启动界面

⑥ 18>19>20>21>22 CallList>StatubarNotifier

    开始启动界面 显示来电

9. packages/services/Telecomm/src/com/android/server/telecom/Call.java

9.1 startCreateConnection()

开始建立连接队列，一旦完成创建，就应当有一个活动active的连接了存在service里。

1. /**
2. * Starts the create connection sequence. Upon completion, there should exist an active
3. * connection through a connection service (or the call will have failed).
4. *
5. * @param phoneAccountRegistrar The phone account registrar.
6. */
7. void startCreateConnection(PhoneAccountRegistrar phoneAccountRegistrar) {
8. Preconditions.checkState(mCreateConnectionProcessor == null);
9. mCreateConnectionProcessor = new CreateConnectionProcessor(this, mRepository, this,
10. phoneAccountRegistrar, mContext);
11. mCreateConnectionProcessor.process();
12. }

③CreateConnectionProcesser>ConnectionServices 开始创建连接>创建连接完成。

10. packages/services/Telecomm/src/com/android/server/telecom/CreateConnectionProcessor.java

10.1 process

1. void process() {
2. Log.v(this, "process");
3. mAttemptRecords = new ArrayList<>();
4. if (mCall.getTargetPhoneAccount() != null) {
5. mAttemptRecords.add(new CallAttemptRecord(
6. mCall.getTargetPhoneAccount(), mCall.getTargetPhoneAccount()));
7. }
8. adjustAttemptsForConnectionManager();
9. adjustAttemptsForEmergency();
10. mAttemptRecordIterator = mAttemptRecords.iterator();
11. attemptNextPhoneAccount();
12. }

10.2 attemptNextPhoneAccount()

service试图建立连接

1. private void attemptNextPhoneAccount() {
2. ...
3. if (mResponse != null && attempt != null) {
4.             Log.i(this, "Trying attempt %s", attempt);
5.             ConnectionServiceWrapper service =
6.                     mRepository.getService(
7.                             attempt.connectionManagerPhoneAccount.getComponentName());
8.             if (service == null) {
9.                 Log.i(this, "Found no connection service for attempt %s", attempt);
10.                 attemptNextPhoneAccount();
11.             } else {
12.                 mCall.setConnectionManagerPhoneAccount(attempt.connectionManagerPhoneAccount);
13.                 mCall.setTargetPhoneAccount(attempt.targetPhoneAccount);
14.                 mCall.setConnectionService(service);
15.                 Log.i(this, "Attempting to call from %s", service.getComponentName());
16.                 service.createConnection(mCall, new Response(service));
17.             }
18.         } 
19. 
    
20. 
    

11.  packages/services/Telecomm/src/com/android/server/telecom/ ConnectionServiceWrapper.java  

11.1 createConnection() 

BindCallback 是interface

       /**

     * 为播出的电话建立连接，或者attach一个已经存在的来电。

     */

1. /**
2. * Creates a new connection for a new outgoing call or to attach to an existing incoming call.
3. */
4. void createConnection(final Call call, final CreateConnectionResponse response) {
5. Log.d(this, "createConnection(%s) via %s.", call, getComponentName());
6. BindCallback callback = new BindCallback() {
7. @Override
8. public void onSuccess() {
9. String callId = mCallIdMapper.getCallId(call);
10. mPendingResponses.put(callId, response);
12. GatewayInfo gatewayInfo = call.getGatewayInfo();
13. Bundle extras = call.getExtras();
14. if (gatewayInfo != null && gatewayInfo.getGatewayProviderPackageName() != null &&
15. gatewayInfo.getOriginalAddress() != null) {
16. extras = (Bundle) extras.clone();
17. extras.putString(
18. TelecomManager.GATEWAY_PROVIDER_PACKAGE,
19. gatewayInfo.getGatewayProviderPackageName());
20. extras.putParcelable(
21. TelecomManager.GATEWAY_ORIGINAL_ADDRESS,
22. gatewayInfo.getOriginalAddress());
23. }
25. try {
26. mServiceInterface.createConnection(
27. call.getConnectionManagerPhoneAccount(),
28. callId,
29. new ConnectionRequest(
30. call.getTargetPhoneAccount(),
31. call.getHandle(),
32. extras,
33. call.getVideoState()),
34. call.isIncoming(),
35. call.isUnknown());
36. } catch (RemoteException e) {
37. Log.e(this, e, "Failure to createConnection -- %s", getComponentName());
38. mPendingResponses.remove(callId).handleCreateConnectionFailure(
39. new DisconnectCause(DisconnectCause.ERROR, e.toString()));
40. }
41. }
43. @Override
44. public void onFailure() {
45. Log.e(this, new Exception(), "Failure to call %s", getComponentName());
46. response.handleCreateConnectionFailure(new DisconnectCause(DisconnectCause.ERROR));
47. }
48. };
50. mBinder.bind(callback);
51. }

12. packages/services/Telecomm/src/com/android/server/telecom/Servicesbinder.java

12.1  bind 绑定连接

          /**

         * 执行绑定到服务的操作（如果还没有绑定）然后执行指定的回调方法

         *

         * @param callback The 回调方法通知绑定是成功或失败

         */

1. /**
2. * Helper class to perform on-demand binding.
3. */
4. final class Binder {
5. /**
6. * Performs an bind to the service (only if not already bound) and executes the
7. * specified callback.
8. *
9. * @param callback The callback to notify of the binding's success or failure.
10. */
11. void bind(BindCallback callback) {
12. ThreadUtil.checkOnMainThread();
13. Log.d(ServiceBinder.this, "bind()");
14. 
    
15. // Reset any abort request if we're asked to bind again.
16. clearAbort();
17. 
    
18. if (!mCallbacks.isEmpty()) {
19. // Binding already in progress, append to the list of callbacks and bail out.
20. mCallbacks.add(callback);
21. return;
22. }
23. 
    
24. mCallbacks.add(callback);
25. if (mServiceConnection == null) {
26. Intent serviceIntent = new Intent(mServiceAction).setComponent(mComponentName);
27. ServiceConnection connection = new ServiceBinderConnection();
28. 
    
29. Log.d(ServiceBinder.this, "Binding to service with intent: %s", serviceIntent);
30. if (!mContext.bindService(serviceIntent, connection, Context.BIND_AUTO_CREATE)) {
31. handleFailedConnection();
32. return;
33. }
34. } else {
35. Log.d(ServiceBinder.this, "Service is already bound.");
36. Preconditions.checkNotNull(mBinder);
37. handleSuccessfulConnection();
38. }
39. }
40. }
41. //

上面的执行完之后，顺序执行到 onServiceConnected

12.2 onServiceConnected

1. private final class ServiceBinderConnection implements ServiceConnection {
2. @Override
3. public void onServiceConnected(ComponentName componentName, IBinder binder) {
4. ThreadUtil.checkOnMainThread();
5. Log.i(this, "Service bound %s", componentName);//这句log被打印出来了
6. // Unbind request was queued so unbind immediately.
7. if (mIsBindingAborted) {
8. clearAbort();
9. logServiceDisconnected("onServiceConnected");
10. mContext.unbindService(this);
11. handleFailedConnection();
12. return;
13. }
14. mServiceConnection = this;
15. setBinder(binder);
16. handleSuccessfulConnection();
17. }

handleSuccessfulConnection

1. private void handleSuccessfulConnection() {
2. for (BindCallback callback : mCallbacks) {
3. callback.onSuccess();
4. }
5. mCallbacks.clear();
6. }

回调上面的onSuccess（） 执行 mServiceInterface . createConnection  createConnection的具体实现在

13. framworks/base/telecomm/java/android/telecom/ConnectionServices.java

1. @Override
2. public void createConnection(
3. PhoneAccountHandle connectionManagerPhoneAccount,
4. String id,
5. ConnectionRequest request,
6. boolean isIncoming,
7. boolean isUnknown) {
8. //chengzhi
9. SomeArgs args = SomeArgs.obtain();
10. args.arg1 = connectionManagerPhoneAccount;
11. args.arg2 = id;
12. args.arg3 = request;
13. args.argi1 = isIncoming ? 1 : 0;
14. args.argi2 = isUnknown ? 1 : 0;
15. mHandler.obtainMessage(MSG_CREATE_CONNECTION, args).sendToTarget();
16. }

13.1 handleMessage() MSG_CREATE_CONNECTION

1. case MSG_CREATE_CONNECTION: {
2. SomeArgs args = (SomeArgs) msg.obj;
3. try {
4. //chengzhi
5. final PhoneAccountHandle connectionManagerPhoneAccount =
6. (PhoneAccountHandle) args.arg1;
7. final String id = (String) args.arg2;
8. final ConnectionRequest request = (ConnectionRequest) args.arg3;
9. final boolean isIncoming = args.argi1 == 1;
10. final boolean isUnknown = args.argi2 == 1;
11. if (!mAreAccountsInitialized) {
12. Log.d(this, "Enqueueing pre-init request %s", id);
13. mPreInitializationConnectionRequests.add(new Runnable() {
14. @Override
15. public void run() {
16. createConnection(
17. connectionManagerPhoneAccount,
18. id,
19. request,
20. isIncoming,
21. isUnknown);
22. }
23. });
24. } else {
25. //chengzhi debug
26. createConnection(
27. connectionManagerPhoneAccount,
28. id,
29. request,
30. isIncoming,
31. isUnknown);
32. }
33. } finally {
34. args.recycle();
35. }
36. break;
37. }

13.1.1 createConnection方法

创建 Connection connection

    /**

     * 这个方法可以被telecom用来创建呼出电话或者一个已存在的来电。任何一种情况，telecom都会循环经过一系列的服务和 调用 createConnection util a connection service取消或者成功完成创建。

     */

1. /**
2. * This can be used by telecom to either create a new outgoing call or attach to an existing
3. * incoming call. In either case, telecom will cycle through a set of services and call
4. * createConnection util a connection service cancels the process or completes it successfully.
5. */
6. private void createConnection(
7. final PhoneAccountHandle callManagerAccount,
8. final String callId,
9. final ConnectionRequest request,
10. boolean isIncoming,
11. boolean isUnknown) {
12. Log.d(this, "createConnection, callManagerAccount: %s, callId: %s, request: %s, " +
13. "isIncoming: %b, isUnknown: %b", callManagerAccount, callId, request, isIncoming,
14. isUnknown);
15. //chengzhi 01
16. Connection connection = isUnknown ? onCreateUnknownConnection(callManagerAccount, request)
17. : isIncoming ? onCreateIncomingConnection(callManagerAccount, request)
18. : onCreateOutgoingConnection(callManagerAccount, request);
19. .....
20.         mAdapter.handleCreateConnectionComplete

前面建立连接成功了，后面处理成功的连接

后面执行 mAdapter.handleCreateConnectionComplete

④ 14>11>9>>8 ConnectionServicesAdapter>CallsManager  处理这个创建的连接>成功来电

14.framework/base/telecomm/java/android/telecom/ConnectionServicesAdapter.java

1. void handleCreateConnectionComplete(
2. String id,
3. ConnectionRequest request,
4. ParcelableConnection connection) {
5. for (IConnectionServiceAdapter adapter : mAdapters) {
6. try {
7. //chengzhi 03
8. adapter.handleCreateConnectionComplete(id, request, connection);
9. } catch (RemoteException e) {
10. }
11. }
12. }

⑤  CallsManager>Phone    成功来电>准备启动界面

15. //packages/services/Telecomm/src/com/android/server/telecom/ConnectionServiceWrapper.java   handleCreateConnectionComplete

1. private final class Adapter extends IConnectionServiceAdapter.Stub {
3. @Override
4. public void handleCreateConnectionComplete(
5. String callId,
6. ConnectionRequest request,
7. ParcelableConnection connection) {
8. logIncoming("handleCreateConnectionComplete %s", request);
9. if (mCallIdMapper.isValidCallId(callId)) {
10. SomeArgs args = SomeArgs.obtain();
11. args.arg1 = callId;
12. args.arg2 = request;
13. args.arg3 = connection;
14. mHandler.obtainMessage(MSG_HANDLE_CREATE_CONNECTION_COMPLETE, args)
15. .sendToTarget();
16. }
17. }

15.2 handleMessage处理消息  MSG_HANDLE_CREATE_CONNECTION_COMPLETE

1. private final Handler mHandler = new Handler() {
2. @Override
3. public void handleMessage(Message msg) {
4. Call call;
5. switch (msg.what) {
6. case MSG_HANDLE_CREATE_CONNECTION_COMPLETE: {
7. SomeArgs args = (SomeArgs) msg.obj;
8. try {
9. String callId = (String) args.arg1;
10. ConnectionRequest request = (ConnectionRequest) args.arg2;
11. ParcelableConnection connection = (ParcelableConnection) args.arg3;
12. handleCreateConnectionComplete(callId, request, connection);
13. } finally {
14. args.recycle();
15. }
16. break;
17. }

15.2.1 handleCreateConnectionComplete ()

如果成功连接

1. private void handleCreateConnectionComplete(
2. String callId,
3. ConnectionRequest request,
4. ParcelableConnection connection) {
5. // TODO: Note we are not using parameter "request", which is a side effect of our tacit
6. // assumption that we have at most one outgoing connection attempt per ConnectionService.
7. // This may not continue to be the case.
8. if (connection.getState() == Connection.STATE_DISCONNECTED) {
9. // A connection that begins in the DISCONNECTED state is an indication of
10. // failure to connect; we handle all failures uniformly
11. removeCall(callId, connection.getDisconnectCause());
12. } else {
13. // Successful connection
14. if (mPendingResponses.containsKey(callId)) {
15. mPendingResponses.remove(callId)
16. .handleCreateConnectionSuccess(mCallIdMapper, connection);
17. }
18. }
19. }

重写  handleCreateConnectionSuccess方法

16. //packages/services/Telecomm/src/com/android/server/telecom/ Call.java 

16.1 handleCreateConnetionSucess()

@Override

public void handleCreateConnectionSuccess(

CallIdMapper idMapper,

ParcelableConnection connection) {

Log.v(this, "handleCreateConnectionSuccessful %s", connection);

mCreateConnectionProcessor = null;

setTargetPhoneAccount(connection.getPhoneAccount());

setHandle(connection.getHandle(), connection.getHandlePresentation());

setCallerDisplayName(

connection.getCallerDisplayName(), connection.getCallerDisplayNamePresentation());

setCallCapabilities(connection.getCapabilities());

setVideoProvider(connection.getVideoProvider());

setVideoState(connection.getVideoState());

setRingbackRequested(connection.isRingbackRequested());

setIsVoipAudioMode(connection.getIsVoipAudioMode());

setStatusHints(connection.getStatusHints());

 

mConferenceableCalls.clear();

for (String id : connection.getConferenceableConnectionIds()) {

mConferenceableCalls.add(idMapper.getCall(id));

}

 

if (mIsUnknown) {

for (Listener l : mListeners) {

l.onSuccessfulUnknownCall(this, getStateFromConnectionState(connection.getState()));

}

} else if (mIsIncoming) {

// We do not handle incoming calls immediately when they are verified by the connection

// service. We allow the caller-info-query code to execute first so that we can read the

// direct-to-voicemail property before deciding if we want to show the incoming call to

// the user or if we want to reject the call.

mDirectToVoicemailQueryPending = true;

 

// Timeout the direct-to-voicemail lookup execution so that we dont wait too long before

// showing the user the incoming call screen.

mHandler.postDelayed(mDirectToVoicemailRunnable, Timeouts.getDirectToVoicemailMillis(

mContext.getContentResolver()));

} else {

for (Listener l : mListeners) {

l.onSuccessfulOutgoingCall(this,

getStateFromConnectionState(connection.getState()));

}

}

}

16.2 Runnable mDirectToVoicemailRunnable

1. private final Runnable mDirectToVoicemailRunnable = new Runnable() {
2. @Override
3. public void run() {
4. processDirectToVoicemail();
5. }

16.2.1 processDirectToVoicemail

1. final class Call implements CreateConnectionResponse {
2. /**
3. * Listener for events on the call.
4. */
5. interface Listener {
6. void onSuccessfulIncomingCall(Call call);
7. ...
8. private void processDirectToVoicemail() {
9. if (mDirectToVoicemailQueryPending) {
10. if (mCallerInfo != null && mCallerInfo.shouldSendToVoicemail) {
11. Log.i(this, "Directing call to voicemail: %s.", this);
12. // TODO: Once we move State handling from CallsManager to Call, we
13. // will not need to set STATE_RINGING state prior to calling reject.
14. setState(CallState.RINGING);
15. reject(false, null);
16. } else {
17. // TODO: Make this class (not CallsManager) responsible for changing
18. // the call state to STATE_RINGING.
19. // TODO: Replace this with state transition to STATE_RINGING.
20. for (Listener l : mListeners) {
21. l.onSuccessfulIncomingCall(this);
22. }
23. }
24. mDirectToVoicemailQueryPending = false;
25. }
26. }

17. //package/services/Telecomm/src/com/android/server/telecom/CallsManager.java  

17.1

@Override onSuccessfulIncomingCall

if 判断后 addCall()

1. public final class CallsManager extends Call.ListenerBase {
2. ...
3. @Override
4. public void onSuccessfulIncomingCall(Call incomingCall) {
5. Log.d(this, "onSuccessfulIncomingCall");
6. setCallState(incomingCall, CallState.RINGING);
8. if (hasMaximumRingingCalls(incomingCall.getTargetPhoneAccount().getId())) {
9. incomingCall.reject(false, null);
10. // since the call was not added to the list of calls, we have to call the missed
11. // call notifier and the call logger manually.
12. mMissedCallNotifier.showMissedCallNotification(incomingCall);
13. mCallLogManager.logCall(incomingCall, Calls.MISSED_TYPE);
14. } else {
15. incomingCall.mIsActiveSub = true;
16. addCall(incomingCall);
17. setActiveSubscription(incomingCall.getTargetPhoneAccount().getId());
18. }
19. }

17.1.1 addCall()

1. /**
2. * Adds the specified call to the main list of live calls.
3. *
4. * @param call The call to add.
5. */
6. private void addCall(Call call) {
7. Log.v(this, "addCall(%s)", call);
8. 
   
9. call.addListener(this);
10. mCalls.add(call);
11. 
    
12. // TODO: Update mForegroundCall prior to invoking
13. // onCallAdded for calls which immediately take the foreground (like the first call).
14. for (CallsManagerListener listener : mListeners) {
15. listener.onCallAdded(call);
16. }
17. updateForegroundCall();
18. }

InCallUI

⑥ CallList>StatubarNotifier    开始启动界面 显示来电

18. //package/services/Telecomm/src/com/android/server/telecom/ InCallController.java  

18.1 重写onCallAdded

@Override onCallAdded（）

1. @Override
2. public void onCallAdded(Call call) {
3. if (mInCallServices.isEmpty()) {
4. bind();//执行这里
5. } else {
6. Log.i(this, "onCallAdded: %s", call);//输出log
7. // Track the call if we don't already know about it.
8. addCall(call);
10. for (Map.Entry<ComponentName, IInCallService> entry : mInCallServices.entrySet()) {
11. ComponentName componentName = entry.getKey();
12. IInCallService inCallService = entry.getValue();
14. ParcelableCall parcelableCall = toParcelableCall(call,
15. componentName.equals(mInCallComponentName) /* includeVideoProvider */);
16. try {
17. inCallService.addCall(parcelableCall);
18. } catch (RemoteException ignored) {
19. }
20. }
21. }
22. }

18.1.1 bind()

InCallServiceConnection inCallServiceConnection = new InCallServiceConnection();

1. /**
2. * Binds to the in-call app if not already connected by binding directly to the saved
3. * component name of the {@link IInCallService} implementation.
4. */
5. private void bind() {
6. ThreadUtil.checkOnMainThread();
7. if (mInCallServices.isEmpty()) {
8. PackageManager packageManager = mContext.getPackageManager();
9. Intent serviceIntent = new Intent(InCallService.SERVICE_INTERFACE);
10. 
    
11. for (ResolveInfo entry : packageManager.queryIntentServices(serviceIntent, 0)) {
12. ServiceInfo serviceInfo = entry.serviceInfo;
13. if (serviceInfo != null) {
14. boolean hasServiceBindPermission = serviceInfo.permission != null &&
15. serviceInfo.permission.equals(
16. Manifest.permission.BIND_INCALL_SERVICE);
17. boolean hasControlInCallPermission = packageManager.checkPermission(
18. Manifest.permission.CONTROL_INCALL_EXPERIENCE,
19. serviceInfo.packageName) == PackageManager.PERMISSION_GRANTED;
20. 
    
21. if (!hasServiceBindPermission) {
22. Log.w(this, "InCallService does not have BIND_INCALL_SERVICE permission: " +
23. serviceInfo.packageName);
24. continue;
25. }
26. 
    
27. if (!hasControlInCallPermission) {
28. Log.w(this,
29. "InCall UI does not have CONTROL_INCALL_EXPERIENCE permission: " +
30. serviceInfo.packageName);
31. continue;
32. }
33. 
    
34. InCallServiceConnection inCallServiceConnection = new InCallServiceConnection();
35. ComponentName componentName = new ComponentName(serviceInfo.packageName,
36. serviceInfo.name);
37. 
    
38. Log.i(this, "Attempting to bind to InCall %s, is dupe? %b ", //log输出
39. serviceInfo.packageName,
40. mServiceConnections.containsKey(componentName));
41. 
    
42. if (!mServiceConnections.containsKey(componentName)) {
43. Intent intent = new Intent(InCallService.SERVICE_INTERFACE);
44. intent.setComponent(componentName);
45. 
    
46. if (mContext.bindServiceAsUser(intent, inCallServiceConnection,
47. Context.BIND_AUTO_CREATE, UserHandle.CURRENT)) {
48. mServiceConnections.put(componentName, inCallServiceConnection);
49. }
50. }
51. }
52. }
53. }
54. }

18.1.2 InCallServiceConnection inCallServiceConnection = new InCallServiceConnection ();

InCallServiceConnection

1. /**
2. * Used to bind to the in-call app and triggers the start of communication between
3. * this class and in-call app.
4. */
5. private class InCallServiceConnection implements ServiceConnection {
6. /** {@inheritDoc} */
7. @Override public void onServiceConnected(ComponentName name, IBinder service) {
8. Log.d(this, "onServiceConnected: %s", name);
9. onConnected(name, service);
10. }
12. /** {@inheritDoc} */
13. @Override public void onServiceDisconnected(ComponentName name) {
14. Log.d(this, "onDisconnected: %s", name);
15. onDisconnected(name);
16. }
17. }

18.1.3 onConnected

1. /**
2. * Persists the {@link IInCallService} instance and starts the communication between
3. * this class and in-call app by sending the first update to in-call app. This method is
4. * called after a successful binding connection is established.
5. *
6. * @param componentName The service {@link ComponentName}.
7. * @param service The {@link IInCallService} implementation.
8. */
9. private void onConnected(ComponentName componentName, IBinder service) {
10. ThreadUtil.checkOnMainThread();
11. 
    
12. Log.i(this, "onConnected to %s", componentName);
13. 
    
14. IInCallService inCallService = IInCallService.Stub.asInterface(service);
15. 
    
16. try {
17. inCallService.setInCallAdapter(new InCallAdapter(CallsManager.getInstance(),
18. mCallIdMapper));
19. mInCallServices.put(componentName, inCallService);
20. } catch (RemoteException e) {
21. Log.e(this, e, "Failed to set the in-call adapter.");
22. return;
23. }
24. 
    
25. // Upon successful connection, send the state of the world to the service.
26. ImmutableCollection<Call> calls = CallsManager.getInstance().getCalls();
27. if (!calls.isEmpty()) {
28. Log.i(this, "Adding %s calls to InCallService after onConnected: %s", calls.size(),
29. componentName);
30. for (Call call : calls) {
31. try {
32. // Track the call if we don't already know about it.
33. Log.i(this, "addCall after binding: %s", call);
34. addCall(call);
35. 
    
36. inCallService.addCall(toParcelableCall(call,
37. componentName.equals(mInCallComponentName) /* includeVideoProvider */));
38. } catch (RemoteException ignored) {
39. }
40. }
41. onAudioStateChanged(null, CallsManager.getInstance().getAudioState());
42. } else {
43. unbind();
44. }
45. }

addCall(call)

19. //framworks/base/telecomm/java/android/telecom/InCallService.java 

@Override 

addCall()

1. /** Manages the binder calls so that the implementor does not need to deal with it. */
2. private final class InCallServiceBinder extends IInCallService.Stub {
3. @Override
4. public void setInCallAdapter(IInCallAdapter inCallAdapter) {
5. mHandler.obtainMessage(MSG_SET_IN_CALL_ADAPTER, inCallAdapter).sendToTarget();
6. }
8. @Override
9. public void addCall(ParcelableCall call) {
10. mHandler.obtainMessage(MSG_ADD_CALL, call).sendToTarget();
11. }

19.1 handleMessage 处理消息 MSG_ADD_CALL

1. /** Default Handler used to consolidate binder method calls onto a single thread. */
2. private final Handler mHandler = new Handler(Looper.getMainLooper()) {
3. @Override
4. public void handleMessage(Message msg) {
5. if (mPhone == null && msg.what != MSG_SET_IN_CALL_ADAPTER) {
6. return;
7. }
8. 
   
9. switch (msg.what) {
10. case MSG_SET_IN_CALL_ADAPTER:
11. mPhone = new Phone(new InCallAdapter((IInCallAdapter) msg.obj));
12. onPhoneCreated(mPhone);
13. break;
14. case MSG_ADD_CALL:
15. mPhone.internalAddCall((ParcelableCall) msg.obj);
16. break;

21. //framworks/base/telecomm/java/android/telecom/Phone.java

internalAddCall()

1. final void internalAddCall(ParcelableCall parcelableCall) {
2. Call call = new Call(this, parcelableCall.getId(), mInCallAdapter,
3. parcelableCall.mIsActiveSub);
4. mCallByTelecomCallId.put(parcelableCall.getId(), call);
5. mCalls.add(call);
6. checkCallTree(parcelableCall);
7. call.internalUpdate(parcelableCall, mCallByTelecomCallId);
8. fireCallAdded(call);
9. }

20.1.1 fireCallAdded()

1. private void fireCallAdded(Call call) {
2. for (Listener listener : mListeners) {
3. listener.onCallAdded(this, call);
4. }
5. }

onCallAdded()  @SystemApi系统Api  其他使用的地方会 @Override

1. @SystemApipublic final class Phone { public abstract static class Listener {
2.     ...
3.     public void onCallAdded(Phone phone, Call call) { }

接22_2.

22_1. //pacakge/apps/InCallUI/src/com/android/incallui/ CallList.java  

@Override 

onCallAdded

1. /**
2. * Static singleton accessor method.
3. */
4. public static CallList getInstance() {
5. return sInstance;
6. }
7. 
   
8. private Phone.Listener mPhoneListener = new Phone.Listener() {
9. @Override
10. public void onCallAdded(Phone phone, android.telecom.Call telecommCall) {
11. Call call = new Call(telecommCall);
12. if (call.getState() == Call.State.INCOMING) {
13. onIncoming(call, call.getCannedSmsResponses());
14. } else {
15. onUpdate(call);
16. }
17. }

执行了下面的方法，但再往后的步骤不是从这里走的。

onIncoming()

1. /**
2. * Called when a single call has changed.
3. */
4. public void onIncoming(Call call, List<String> textMessages) {
5. Log.d(this, "onIncoming - " + call);
7. // Update active subscription from call object. it will be set by
8. // Telecomm service for incoming call and whenever active sub changes.
9. if (call.mIsActiveSub) {
10. long sub = call.getSubId();
11. Log.d(this, "onIncoming - sub:" + sub + " mSubId:" + mSubId);
12. if (sub != mSubId) {
13. setActiveSubscription(sub);
14. }
15. }
17. if (updateCallInMap(call)) {
18. Log.i(this, "onIncoming - " + call);
19. }
20. updateCallTextMap(call, textMessages);
22. for (Listener listener : mListeners) {
23. listener.onIncomingCall(call);
24. }
25. }

22_2. //pacakge/apps/InCallUI/src/com/android/incallui/InCallPresenter.java  

@Override 

onCallAdded

1. public class InCallPresenter implements CallList.Listener, InCallPhoneListener {
2. ...
3. private final Phone.Listener mPhoneListener = new Phone.Listener() {
5. ...
6.  
7.         @Override
8. public void onCallAdded(Phone phone, android.telecom.Call call) {
9. call.addListener(mCallListener);
10. }

23. //pacakge/apps/InCallUI/src/com/android/incallui/InCallPresenter.java  @override onCallAdded

onIncomingCall

1. /**
2. * Called when there is a new incoming call.
3. *
4. * @param call
5. */
6. @Override
7. public void onIncomingCall(Call call) {
8. InCallState newState = startOrFinishUi(InCallState.INCOMING);
9. InCallState oldState = mInCallState;
11. Log.i(this, "Phone switching state: " + oldState + " -> " + newState);
12. mInCallState = newState;
14. for (IncomingCallListener listener : mIncomingCallListeners) {
15. listener.onIncomingCall(oldState, mInCallState, call);
16. }
18. if (CallList.getInstance().isDsdaEnabled() && (mInCallActivity != null)) {
19. mInCallActivity.updateDsdaTab();
20. }
21. }

startOrFinishUi() 开始或结束UI

1. /**
2. * When the state of in-call changes, this is the first method to get called. It determines if
3. * the UI needs to be started or finished depending on the new state and does it.
4. */
5. private InCallState startOrFinishUi(InCallState newState) {
6. Log.d(this, "startOrFinishUi: " + mInCallState + " -> " + newState);
7. 
   
8. // TODO: Consider a proper state machine implementation
9. 
   
10. // If the state isn't changing or if we're transitioning from pending outgoing to actual
11. // outgoing, we have already done any starting/stopping of activities in a previous pass
12. // ...so lets cut out early
13. boolean alreadyOutgoing = mInCallState == InCallState.PENDING_OUTGOING &&
14. newState == InCallState.OUTGOING;
15. boolean isAnyOtherSubActive = InCallState.INCOMING == newState &&
16. mCallList.isAnyOtherSubActive(mCallList.getActiveSubscription());
17. if ((newState == mInCallState && !(mInCallActivity == null && isAnyOtherSubActive))
18. || alreadyOutgoing) {
19. return newState;
20. }
21. 
    
22. // A new Incoming call means that the user needs to be notified of the the call (since
23. // it wasn't them who initiated it). We do this through full screen notifications and
24. // happens indirectly through {@link StatusBarNotifier}.
25. //
26. // The process for incoming calls is as follows:
27. //
28. // 1) CallList - Announces existence of new INCOMING call
29. // 2) InCallPresenter - Gets announcement and calculates that the new InCallState
30. // - should be set to INCOMING.
31. // 3) InCallPresenter - This method is called to see if we need to start or finish
32. // the app given the new state.
33. // 4) StatusBarNotifier - Listens to InCallState changes. InCallPresenter calls
34. // StatusBarNotifier explicitly to issue a FullScreen Notification
35. // that will either start the InCallActivity or show the user a
36. // top-level notification dialog if the user is in an immersive app.
37. // That notification can also start the InCallActivity.
38. // 5) InCallActivity - Main activity starts up and at the end of its onCreate will
39. // call InCallPresenter::setActivity() to let the presenter
40. // know that start-up is complete.
41. //
42. // [ AND NOW YOU'RE IN THE CALL. voila! ]
43. //
44. // Our app is started using a fullScreen notification. We need to do this whenever
45. // we get an incoming call.
46. final boolean startStartupSequence = (InCallState.INCOMING == newState);
47. 
    
48. // A dialog to show on top of the InCallUI to select a PhoneAccount
49. final boolean showAccountPicker = (InCallState.WAITING_FOR_ACCOUNT == newState);
50. 
    
51. // A new outgoing call indicates that the user just now dialed a number and when that
52. // happens we need to display the screen immediately or show an account picker dialog if
53. // no default is set. However, if the main InCallUI is already visible, we do not want to
54. // re-initiate the start-up animation, so we do not need to do anything here.
55. //
56. // It is also possible to go into an intermediate state where the call has been initiated
57. // but Telecomm has not yet returned with the details of the call (handle, gateway, etc.).
58. // This pending outgoing state can also launch the call screen.
59. //
60. // This is different from the incoming call sequence because we do not need to shock the
61. // user with a top-level notification. Just show the call UI normally.
62. final boolean mainUiNotVisible = !isShowingInCallUi() || !getCallCardFragmentVisible();
63. final boolean showCallUi = ((InCallState.PENDING_OUTGOING == newState ||
64. InCallState.OUTGOING == newState) && mainUiNotVisible);
65. 
    
66. // TODO: Can we be suddenly in a call without it having been in the outgoing or incoming
67. // state? I havent seen that but if it can happen, the code below should be enabled.
68. // showCallUi |= (InCallState.INCALL && !isActivityStarted());
69. 
    
70. // The only time that we have an instance of mInCallActivity and it isn't started is
71. // when it is being destroyed. In that case, lets avoid bringing up another instance of
72. // the activity. When it is finally destroyed, we double check if we should bring it back
73. // up so we aren't going to lose anything by avoiding a second startup here.
74. boolean activityIsFinishing = mInCallActivity != null && !isActivityStarted();
75. if (activityIsFinishing) {
76. Log.i(this, "Undo the state change: " + newState + " -> " + mInCallState);
77. return mInCallState;
78. }
79. 
    
80. if (showCallUi || showAccountPicker) {
81. Log.i(this, "Start in call UI");
82. showInCall(false /* showDialpad */, !showAccountPicker /* newOutgoingCall */);
83. } 
84.         
85.         //如果是来电的话
86.         else if (startStartupSequence) {
87. Log.i(this, "Start Full Screen in call UI");
88. 
    
89. // We're about the bring up the in-call UI for an incoming call. If we still have
90. // dialogs up, we need to clear them out before showing incoming screen.
91. if (isActivityStarted()) {
92. mInCallActivity.dismissPendingDialogs();
93. }
94. if (!startUi(newState)) {
95. // startUI refused to start the UI. This indicates that it needed to restart the
96. // activity. When it finally restarts, it will call us back, so we do not actually
97. // change the state yet (we return mInCallState instead of newState).
98. return mInCallState;
99. }
100. } else if (newState == InCallState.NO_CALLS) {
101. // The new state is the no calls state. Tear everything down.
102. attemptFinishActivity();
103. attemptCleanup();
104. }
105. 
     
106. return newState;
107. }

startUi 创建UI

1. private boolean startUi(InCallState inCallState) {
2. final Call incomingCall = mCallList.getIncomingCall();
3. boolean isCallWaiting = mCallList.getActiveCall() != null &&
4. mCallList.getIncomingCall() != null;
6. // If the screen is off, we need to make sure it gets turned on for incoming calls.
7. // This normally works just fine thanks to FLAG_TURN_SCREEN_ON but that only works
8. // when the activity is first created. Therefore, to ensure the screen is turned on
9. // for the call waiting case, we finish() the current activity and start a new one.
10. // There should be no jank from this since the screen is already off and will remain so
11. // until our new activity is up.
13. // In addition to call waiting scenario, we need to force finish() in case of DSDA when
14. // we get an incoming call on one sub and there is a live call in other sub and screen
15. // is off.
16. boolean anyOtherSubActive = (incomingCall != null &&
17. mCallList.isAnyOtherSubActive(mCallList.getActiveSubscription()));
18. Log.i(this, "Start UI " + " anyOtherSubActive:" + anyOtherSubActive);
19. if (isCallWaiting || anyOtherSubActive) {
20. if (mProximitySensor.isScreenReallyOff() && isActivityStarted()) {
21. mInCallActivity.finish();
22. // When the activity actually finishes, we will start it again if there are
23. // any active calls, so we do not need to start it explicitly here. Note, we
24. // actually get called back on this function to restart it.
26. // We return false to indicate that we did not actually start the UI.
27. return false;
28. } else {
29. showInCall(false, false);
30. }
31. } else {
32. mStatusBarNotifier.updateNotification(inCallState, mCallList);
33. }
34. return true;
35. }

23. //pakages/apps/InCallUI/src/com/android/incallui/StatuBarNotifier.java       updateNotification()

1. /**
2. * Updates the phone app's status bar notification *and* launches the
3. * incoming call UI in response to a new incoming call.
4. *
5. * If an incoming call is ringing (or call-waiting), the notification
6. * will also include a "fullScreenIntent" that will cause the
7. * InCallScreen to be launched, unless the current foreground activity
8. * is marked as "immersive".
9. *
10. * (This is the mechanism that actually brings up the incoming call UI
11. * when we receive a "new ringing connection" event from the telephony
12. * layer.)
13. *
14. * Also note that this method is safe to call even if the phone isn't
15. * actually ringing (or, more likely, if an incoming call *was*
16. * ringing briefly but then disconnected). In that case, we'll simply
17. * update or cancel the in-call notification based on the current
18. * phone state.
19. *
20. * @see #updateInCallNotification(InCallState,CallList)
21. */
22. public void updateNotification(InCallState state, CallList callList) {
23. updateInCallNotification(state, callList);
24. }

updateInCallNotification()

1. /**
2. * Helper method for updateInCallNotification() and
3. * updateNotification(): Update the phone app's
4. * status bar notification based on the current telephony state, or
5. * cancels the notification if the phone is totally idle.
6. */
7. private void updateInCallNotification(final InCallState state, CallList callList) {
8. Log.d(this, "updateInCallNotification...");
10. Call call = getCallToShow(callList);
12. // Whether we have an outgoing call but the incall UI has yet to show up.
13. // Since we don't normally show a notification while the incall screen is
14. // in the foreground, if we show the outgoing notification before the activity
15. // comes up the user will see it flash on and off on an outgoing call. We therefore
16. // do not show the notification for outgoing calls before the activity has started.
17. boolean isOutgoingWithoutIncallUi =
18. state == InCallState.OUTGOING &&
19. !InCallPresenter.getInstance().isActivityPreviouslyStarted();
21. // Whether to show a notification immediately.
22. boolean showNotificationNow =
24. // We can still be in the INCALL state when a call is disconnected (in order to show
25. // the "Call ended" screen. So check that we have an active connection too.
26. (call != null) &&
28. // We show a notification iff there is an active call.
29. state.isConnectingOrConnected() &&
31. // If the UI is already showing, then for most cases we do not want to show
32. // a notification since that would be redundant, unless it is an incoming call,
33. // in which case the notification is actually an important alert.
34. (!InCallPresenter.getInstance().isShowingInCallUi() || state.isIncoming()) &&
36. // If we have an outgoing call with no UI but the timer has fired, we show
37. // a notification anyway.
38. (!isOutgoingWithoutIncallUi ||
39. mNotificationTimer.getState() == NotificationTimer.State.FIRED);
41. if (showNotificationNow) {
42. showNotification(call);
43. } else {
44. cancelInCall();
45. if (isOutgoingWithoutIncallUi &&
46. mNotificationTimer.getState() == NotificationTimer.State.CLEAR) {
47. mNotificationTimer.schedule();
48. }
49. }
51. // If we see a UI, or we are done with calls for now, reset to ground state.
52. if (InCallPresenter.getInstance().isShowingInCallUi() || call == null) {
53. mNotificationTimer.clear();
54. }
55. }

1. private void showNotification(final Call call) {
2. final boolean isIncoming = (call.getState() == Call.State.INCOMING ||
3. call.getState() == Call.State.CALL_WAITING);
4. 
   
5. // we make a call to the contact info cache to query for supplemental data to what the
6. // call provides. This includes the contact name and photo.
7. // This callback will always get called immediately and synchronously with whatever data
8. // it has available, and may make a subsequent call later (same thread) if it had to
9. // call into the contacts provider for more data.
10. mContactInfoCache.findInfo(call, isIncoming, new ContactInfoCacheCallback() {
11. @Override
12. public void onContactInfoComplete(String callId, ContactCacheEntry entry) {
13. Call call = CallList.getInstance().getCallById(callId);
14. if (call != null) {
15. buildAndSendNotification(call, entry);
16. }
17. }
18. 
    
19. @Override
20. public void onImageLoadComplete(String callId, ContactCacheEntry entry) {
21. Call call = CallList.getInstance().getCallById(callId);
22. if (call != null) {
23. buildAndSendNotification(call, entry);
24. }
25. }
26. });
27. }

构建heads-ip notification通知

1. /**
2. * Sets up the main Ui for the notification
3. */
4. private void buildAndSendNotification(Call originalCall, ContactCacheEntry contactInfo) {
6. // This can get called to update an existing notification after contact information has come
7. // back. However, it can happen much later. Before we continue, we need to make sure that
8. // the call being passed in is still the one we want to show in the notification.
9. final Call call = getCallToShow(CallList.getInstance());
10. if (call == null || !call.getId().equals(originalCall.getId())) {
11. return;
12. }
14. final int state = call.getState();
15. final boolean isConference = call.isConferenceCall();
16. final boolean isVideoUpgradeRequest = call.getSessionModificationState()
17. == Call.SessionModificationState.RECEIVED_UPGRADE_TO_VIDEO_REQUEST;
19. // Check if data has changed; if nothing is different, don't issue another notification.
20. final int iconResId = getIconToDisplay(call);
21. final Bitmap largeIcon = getLargeIconToDisplay(contactInfo, isConference);
22. final int contentResId = getContentString(call);
23. final String contentTitle = getContentTitle(contactInfo, isConference);
25. if (!checkForChangeAndSaveData(iconResId, contentResId, largeIcon, contentTitle, state)) {
26. return;
27. }
29. /*
30. * Nothing more to check...build and send it.
31. */
32. final Notification.Builder builder = getNotificationBuilder();
34. // Set up the main intent to send the user to the in-call screen
35. final PendingIntent inCallPendingIntent = createLaunchPendingIntent();
36. builder.setContentIntent(inCallPendingIntent);
38. // Set the intent as a full screen intent as well if a call is incoming
39. if ((state == Call.State.INCOMING || state == Call.State.CALL_WAITING) &&
40. !InCallPresenter.getInstance().isShowingInCallUi()) {
41. configureFullScreenIntent(builder, inCallPendingIntent, call);
42. }
44. // Set the content
45. builder.setContentText(mContext.getString(contentResId));
46. builder.setSmallIcon(iconResId);
47. builder.setContentTitle(contentTitle);
48. builder.setLargeIcon(largeIcon);
49. builder.setColor(mContext.getResources().getColor(R.color.dialer_theme_color));
51. if (isVideoUpgradeRequest) {
52. builder.setUsesChronometer(false);
53. addDismissUpgradeRequestAction(builder);
54. addAcceptUpgradeRequestAction(builder);
55. } else {
56. createIncomingCallNotification(call, state, builder);
57. }
59. addPersonReference(builder, contactInfo, call);
61. /*
62. * Fire off the notification // 发射通知！！
63. */
64. Notification notification = builder.build();
65. Log.d(this, "Notifying IN_CALL_NOTIFICATION: " + notification);
66. mNotificationManager.notify(IN_CALL_NOTIFICATION, notification);
67. mIsShowingNotification = true;
68. }

上面两个方法都要执行，一个是创建通知 一个是启动通知

1.创建通知

createIncomingCallNotification

1. private void createIncomingCallNotification(
2. Call call, int state, Notification.Builder builder) {
3. if (state == Call.State.ACTIVE) {
4. builder.setUsesChronometer(true);
5. builder.setWhen(call.getConnectTimeMillis());
6. } else {
7. builder.setUsesChronometer(false);
8. }
9. 
   
10. // Add hang up option for any active calls (active | onhold), outgoing calls (dialing).
11. if (state == Call.State.ACTIVE ||
12. state == Call.State.ONHOLD ||
13. Call.State.isDialing(state)) {
14. addHangupAction(builder);
15. } else if (state == Call.State.INCOMING || state == Call.State.CALL_WAITING) {
16. addDismissAction(builder);
17. if (call.isVideoCall(mContext)) {
18. addVoiceAction(builder);
19. addVideoCallAction(builder);
20. } else {
21. addAnswerAction(builder);
22. }
23. }
24. }

上面添加“接听”和“忽略”两个操作，

1. private void addAnswerAction(Notification.Builder builder) {
2. Log.i(this, "Will show \"answer\" action in the incoming call Notification");
4. PendingIntent answerVoicePendingIntent = createNotificationPendingIntent(
5. mContext, InCallApp.ACTION_ANSWER_VOICE_INCOMING_CALL);
6. builder.addAction(R.drawable.ic_call_white_24dp,
7. mContext.getText(R.string.description_target_answer),
8. answerVoicePendingIntent);
9. }
11. private void addDismissAction(Notification.Builder builder) {
12. Log.i(this, "Will show \"dismiss\" action in the incoming call Notification");
14. PendingIntent declinePendingIntent =
15. createNotificationPendingIntent(mContext, InCallApp.ACTION_DECLINE_INCOMING_CALL);
16. builder.addAction(R.drawable.ic_close_dk,
17. mContext.getText(R.string.notification_action_dismiss),
18. declinePendingIntent);
19. }

启动通知了：

NotificationManager.java

1. /**
2. * Post a notification to be shown in the status bar. If a notification with
3. * the same id has already been posted by your application and has not yet been canceled, it
4. * will be replaced by the updated information.
5. *
6. * @param id An identifier for this notification unique within your
7. * application.
8. * @param notification A {@link Notification} object describing what to show the user. Must not
9. * be null.
10. */
11. public void notify(int id, Notification notification)
12. {
13. notify(null, id, notification);
14. }

根据下面的说明我们知道，在状态栏显示处通知

我们跟的是来电的代码，来电信息呈献给用户有两种情况：

1. 屏幕唤醒状态下 是在通知栏显示通知

2. 屏幕熄灭状态下 点亮屏幕全屏显示

如下图所示：

1. /**
2. * Post a notification to be shown in the status bar. If a notification with
3. * the same tag and id has already been posted by your application and has not yet been
4. * canceled, it will be replaced by the updated information.
5. *
6. * @param tag A string identifier for this notification. May be {@code null}.
7. * @param id An identifier for this notification. The pair (tag, id) must be unique
8. * within your application.
9. * @param notification A {@link Notification} object describing what to
10. * show the user. Must not be null.
11. */
12. public void notify(String tag, int id, Notification notification)
13. {
14. int[] idOut = new int[1];
15. INotificationManager service = getService();
16. String pkg = mContext.getPackageName();
17. if (notification.sound != null) {
18. notification.sound = notification.sound.getCanonicalUri();
19. if (StrictMode.vmFileUriExposureEnabled()) {
20. notification.sound.checkFileUriExposed("Notification.sound");
21. }
22. }
23. if (localLOGV) Log.v(TAG, pkg + ": notify(" + id + ", " + notification + ")");
24. Notification stripped = notification.clone();
25. Builder.stripForDelivery(stripped);
26. try {
27. service.enqueueNotificationWithTag(pkg, mContext.getOpPackageName(), tag, id,
28. stripped, idOut, UserHandle.myUserId());
29. if (id != idOut[0]) {
30. Log.w(TAG, "notify: id corrupted: sent " + id + ", got back " + idOut[0]);
31. }
32. } catch (RemoteException e) {
33. }
34. }