Android7.0 Phone应用源码分析（三） phone拒接流程分析，android7.0拒接

Android7.0 Phone应用源码分析（三） phone拒接流程分析，android7.0拒接

接上篇博文：Android7.0 Phone应用源码分析（二） phone来电流程分析

今天我们再来分析下Android7.0 的phone的拒接流程

下面先来看一下拒接电话流程时序图

步骤1：滑动按钮到拒接图标，会调用到AnswerFragment的onDecline方法

com.android.incallui.AnswerFragment

public void onDecline(Context context) {
        getPresenter().onDecline(context);
 }

最后是调用到AnswerPresenteronDecline方法

com.android.incallui.AnswerPresenter
 public void onDecline(Context context) {
        Log.d(this, "onDecline " + mCallId);
        if (mCall.getSessionModificationState()
                == Call.SessionModificationState.RECEIVED_UPGRADE_TO_VIDEO_REQUEST) {
            InCallPresenter.getInstance().declineUpgradeRequest(context);
        } else {
            TelecomAdapter.getInstance().rejectCall(mCall.getId(), false, null);
        }
 }

步骤2：进入TelecomAdapter的rejectCall方法

com.android.incallui.TelecomAdapter
void rejectCall(String callId, boolean rejectWithMessage, String message) {
        android.telecom.Call call = getTelecomCallById(callId);
        if (call != null) {
            call.reject(rejectWithMessage, message);
        } else {
            Log.e(this, "error rejectCall, call not in call list: " + callId);
        }
}

TelecomAdapter是incallui与telecom通信的代理类，这里通过callid取出对应的Call对象（android.telecom.Call）

步骤3：调用到framework里Call的reject方法

android.telecom.Call
public void reject(boolean rejectWithMessage, String textMessage) {
        mInCallAdapter.rejectCall(mTelecomCallId, rejectWithMessage, textMessage);
 }

这里mInCallAdapter是android.telecom.InCallAdapter类，是在Call对象创建的时候由外部传入的参数

在telecom绑定InCallService服务的时候，会传递一个AIDL接口对象，InCallService会生成InCallAdapter对象来保存这个接口对象

步骤4:InCallAdapter的rejectCall方法

android.telecom.InCallAdapter

public void rejectCall(String callId, boolean rejectWithMessage, String textMessage) {
        try {
            mAdapter.rejectCall(callId, rejectWithMessage, textMessage);
        } catch (RemoteException e) {
        }
 }

mAdapter就是incallui与telecom通信的AIDL接口

步骤5：跨进程调用进入telecom进程，该AIDL接口具体实现类是InCallAdapter，虽然类名一样但是不同的包名，这里需要注意一下

com.android.server.telecom.InCallAdapter
 public void rejectCall(String callId, boolean rejectWithMessage, String textMessage) {
        try {
            Log.startSession("ICA.rC", mOwnerComponentName);
            long token = Binder.clearCallingIdentity();
            try {
                synchronized (mLock) {
                    Log.d(this, "rejectCall(%s,%b,%s)", callId, rejectWithMessage, textMessage);
                    Call call = mCallIdMapper.getCall(callId);
                    if (call != null) {
                        mCallsManager.rejectCall(call, rejectWithMessage, textMessage);
                    } else {
                        Log.w(this, "setRingback, unknown call id: %s", callId);
                    }
                }
            } finally {
                Binder.restoreCallingIdentity(token);
            }
        } finally {
            Log.endSession();
        }
 }

这里同样是根据callid取出对应Call（com.android.server.telecom.Call),最后调用CallsManager的rejectCall方法传入call

步骤6：CallsManager的rejectCall方法

com.android.server.telecom.CallsManager
public void rejectCall(Call call, boolean rejectWithMessage, String textMessage) {
        if (!mCalls.contains(call)) {
            Log.i(this, "Request to reject a non-existent call %s", call);
        } else {
            for (CallsManagerListener listener : mListeners) {
                listener.onIncomingCallRejected(call, rejectWithMessage, textMessage);
            }
            call.reject(rejectWithMessage, textMessage);
        }
 }

这里先通知观察者来电拒接事件，比如CallAudioManager对该事件感兴趣，它的处理是停止播放来电铃声和来电等待声

com.android.server.telecom.CallAudioManager
 public void onIncomingCallRejected(Call call, boolean rejectWithMessage, String message) {
        maybeStopRingingAndCallWaitingForAnsweredOrRejectedCall(call);
}
private void maybeStopRingingAndCallWaitingForAnsweredOrRejectedCall(Call call) {
        // Check to see if the call being answered/rejected is the only ringing call, since this
        // will be called before the connection service acknowledges the state change.
        if (mRingingCalls.size() == 0 ||
                (mRingingCalls.size() == 1 && call == mRingingCalls.iterator().next())) {
            mRinger.stopRinging();
            mRinger.stopCallWaiting();
        }
 }

最后再调用前面传进来的call对象的reject方法

步骤7：Call的reject方法

com.android.server.telecom.Call
public void reject(boolean rejectWithMessage, String textMessage) {
        Preconditions.checkNotNull(mConnectionService);

        // Check to verify that the call is still in the ringing state. A call can change states
        // between the time the user hits 'reject' and Telecomm receives the command.
        if (isRinging("reject")) {
            // Ensure video state history tracks video state at time of rejection.
            mVideoStateHistory |= mVideoState;

            mConnectionService.reject(this, rejectWithMessage, textMessage);
            Log.event(this, Log.Events.REQUEST_REJECT);
        }
}

这里的mConnectionService是ConnectionServiceWrapper类，是telecom与telephony通信的代理类

步骤8：ConnectionServiceWrapper的reject方法

com.android.server.telecom.ConnectionServiceWrapper
void reject(Call call, boolean rejectWithMessage, String message) {
        final String callId = mCallIdMapper.getCallId(call);
        if (callId !=