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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.telecomm;
import android.app.Service;
import android.content.Intent;
import android.os.Handler;
import android.os.IBinder;
import android.os.Looper;
import android.os.Message;
import com.android.internal.telecomm.IInCallAdapter;
import com.android.internal.telecomm.IInCallService;
/**
* This service is implemented by any app that wishes to provide the user-interface for managing
* phone calls. Telecomm binds to this service while there exists a live (active or incoming)
* call, and uses it to notify the in-call app of any live and and recently disconnected calls.
* TODO(santoscordon): Needs more/better description of lifecycle once the interface is better
* defined.
* TODO(santoscordon): What happens if two or more apps on a given device implement this interface?
*/
public abstract class InCallService extends Service {
private static final int MSG_SET_IN_CALL_ADAPTER = 1;
private static final int MSG_ADD_CALL = 2;
private static final int MSG_SET_ACTIVE = 3;
private static final int MSG_SET_DISCONNECTED = 4;
private static final int MSG_SET_HOLD = 5;
private static final int MSG_ON_AUDIO_STATE_CHANGED = 6;
/** Default Handler used to consolidate binder method calls onto a single thread. */
private final Handler mHandler = new Handler(Looper.getMainLooper()) {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_SET_IN_CALL_ADAPTER:
InCallAdapter adapter = new InCallAdapter((IInCallAdapter) msg.obj);
setInCallAdapter(adapter);
break;
case MSG_ADD_CALL:
addCall((CallInfo) msg.obj);
break;
case MSG_SET_ACTIVE:
setActive((String) msg.obj);
break;
case MSG_SET_DISCONNECTED:
setDisconnected((String) msg.obj, msg.arg1);
break;
case MSG_SET_HOLD:
setOnHold((String) msg.obj);
break;
case MSG_ON_AUDIO_STATE_CHANGED:
onAudioStateChanged((CallAudioState) msg.obj);
default:
break;
}
}
};
/** Manages the binder calls so that the implementor does not need to deal with it. */
private final class InCallServiceBinder extends IInCallService.Stub {
/** {@inheritDoc} */
@Override
public void setInCallAdapter(IInCallAdapter inCallAdapter) {
mHandler.obtainMessage(MSG_SET_IN_CALL_ADAPTER, inCallAdapter).sendToTarget();
}
/** {@inheritDoc} */
@Override
public void addCall(CallInfo callInfo) {
mHandler.obtainMessage(MSG_ADD_CALL, callInfo).sendToTarget();
}
/** {@inheritDoc} */
@Override
public void setActive(String callId) {
mHandler.obtainMessage(MSG_SET_ACTIVE, callId).sendToTarget();
}
/** {@inheritDoc} */
@Override
public void setDisconnected(String callId, int disconnectCause) {
mHandler.obtainMessage(MSG_SET_DISCONNECTED, disconnectCause, 0, callId).sendToTarget();
}
/** {@inheritDoc} */
@Override
public void setOnHold(String callId) {
mHandler.obtainMessage(MSG_SET_HOLD, callId).sendToTarget();
}
/** {@inheritDoc} */
@Override
public void onAudioStateChanged(CallAudioState audioState) {
mHandler.obtainMessage(MSG_ON_AUDIO_STATE_CHANGED, audioState).sendToTarget();
}
}
private final InCallServiceBinder mBinder;
protected InCallService() {
mBinder = new InCallServiceBinder();
}
@Override
public final IBinder onBind(Intent intent) {
return mBinder;
}
/**
* Provides the in-call app an adapter object through which to send call-commands such as
* answering and rejecting incoming calls, disconnecting active calls, and putting calls in
* special states (mute, hold, etc).
*
* @param inCallAdapter Adapter through which an in-call app can send call-commands to Telecomm.
*/
protected abstract void setInCallAdapter(InCallAdapter inCallAdapter);
/**
* Indicates to the in-call app that a new call has been created and an appropriate
* user-interface should be built and shown to notify the user. Information about the call
* including its current state is passed in through the callInfo object.
*
* @param callInfo Information about the new call.
*/
protected abstract void addCall(CallInfo callInfo);
/**
* Indicates to the in-call app that a call has moved to the {@link CallState#ACTIVE} state.
*
* @param callId The identifier of the call that became active.
*/
protected abstract void setActive(String callId);
/**
* Indicates to the in-call app that a call has been moved to the
* {@link CallState#DISCONNECTED} and the user should be notified.
*
* @param callId The identifier of the call that was disconnected.
* @param disconnectCause The reason for the disconnection, any of
* {@link android.telephony.DisconnectCause}.
*/
protected abstract void setDisconnected(String callId, int disconnectCause);
/**
* Indicates to the in-call app that a call has been moved to the
* {@link android.telecomm.CallState#ON_HOLD} state and the user should be notified.
*
* @param callId The identifier of the call that was put on hold.
*/
protected abstract void setOnHold(String callId);
/**
* Called when the audio state changes.
*
* @param audioState The new {@link CallAudioState}.
*/
protected abstract void onAudioStateChanged(CallAudioState audioState);
}
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