PhoneStateBroadcaster.java revision 880b98372368b1d2be2ed34edaeb1e2f338d121a 
1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.server.telecom;
18
19import android.os.RemoteException;
20import android.os.ServiceManager;
21import android.telephony.TelephonyManager;
22
23import com.android.internal.telephony.ITelephonyRegistry;
24
25/**
26 * Send a {@link TelephonyManager#ACTION_PHONE_STATE_CHANGED} broadcast when the call state
27 * changes.
28 */
29final class PhoneStateBroadcaster extends CallsManagerListenerBase {
30
31    private final CallsManager mCallsManager;
32    private final ITelephonyRegistry mRegistry;
33    private int mCurrentState = TelephonyManager.CALL_STATE_IDLE;
34
35    public PhoneStateBroadcaster(CallsManager callsManager) {
36        mCallsManager = callsManager;
37        mRegistry = ITelephonyRegistry.Stub.asInterface(ServiceManager.getService(
38                "telephony.registry"));
39        if (mRegistry == null) {
40            Log.w(this, "TelephonyRegistry is null");
41        }
42    }
43
44    @Override
45    public void onCallStateChanged(Call call, int oldState, int newState) {
46        updateStates(call);
47    }
48
49    @Override
50    public void onCallAdded(Call call) {
51        updateStates(call);
52    }
53
54    @Override
55    public void onCallRemoved(Call call) {
56        updateStates(call);
57    }
58
59    private void updateStates(Call call) {
60        // Recalculate the current phone state based on the consolidated state of the remaining
61        // calls in the call list.
62        int callState = TelephonyManager.CALL_STATE_IDLE;
63        if (mCallsManager.hasRingingCall()) {
64            callState = TelephonyManager.CALL_STATE_RINGING;
65        } else if (mCallsManager.getFirstCallWithState(CallState.DIALING, CallState.ACTIVE,
66                    CallState.ON_HOLD) != null) {
67            callState = TelephonyManager.CALL_STATE_OFFHOOK;
68        }
69        sendPhoneStateChangedBroadcast(call, callState);
70    }
71
72    int getCallState() {
73        return mCurrentState;
74    }
75
76    private void sendPhoneStateChangedBroadcast(Call call, int phoneState) {
77        if (phoneState == mCurrentState) {
78            return;
79        }
80
81        mCurrentState = phoneState;
82
83        String callHandle = null;
84        if (call.getHandle() != null) {
85            callHandle = call.getHandle().getSchemeSpecificPart();
86        }
87
88        try {
89            if (mRegistry != null) {
90                mRegistry.notifyCallState(phoneState, callHandle);
91                Log.i(this, "Broadcasted state change: %s", mCurrentState);
92            }
93        } catch (RemoteException e) {
94            Log.w(this, "RemoteException when notifying TelephonyRegistry of call state change.");
95        }
96    }
97}
98