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      1 /*
      2  * Copyright (C) 2015 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 
     17 package android.support.car;
     18 
     19 import android.content.ComponentName;
     20 import android.content.Context;
     21 import android.content.ServiceConnection;
     22 import android.os.Handler;
     23 import android.os.IBinder;
     24 import android.os.Looper;
     25 import android.os.Message;
     26 import android.support.car.content.pm.CarPackageManagerEmbedded;
     27 import android.support.car.hardware.CarSensorManagerEmbedded;
     28 import android.support.car.media.CarAudioManagerEmbedded;
     29 import android.support.car.navigation.CarNavigationManagerEmbedded;
     30 
     31 import java.util.LinkedList;
     32 
     33 /**
     34  * Default CarServiceLoader for system with built-in car service (=embedded).
     35  * @hide
     36  */
     37 public class CarServiceLoaderEmbedded extends CarServiceLoader {
     38 
     39     private final ServiceConnection mServiceConnection = new ServiceConnection() {
     40 
     41         @Override
     42         public void onServiceConnected(ComponentName name, IBinder service) {
     43             getConnectionListener().onServiceConnected(name);
     44         }
     45 
     46         @Override
     47         public void onServiceDisconnected(ComponentName name) {
     48             getConnectionListener().onServiceDisconnected(name);
     49         }
     50     };
     51 
     52     private final android.car.Car mCar;
     53     private final LinkedList<CarConnectionListener> mCarConnectionListeners =
     54             new LinkedList<>();
     55     private final CallbackHandler mHandler;
     56 
     57     public CarServiceLoaderEmbedded(Context context, ServiceConnectionListener listener,
     58             Looper looper) {
     59         super(context, listener, looper);
     60         mCar = android.car.Car.createCar(context, mServiceConnection, looper);
     61         mHandler = new CallbackHandler(looper);
     62     }
     63 
     64     @Override
     65     public void connect() throws IllegalStateException {
     66         mCar.connect();
     67     }
     68 
     69     @Override
     70     public void disconnect() {
     71         mCar.disconnect();
     72     }
     73 
     74     @Override
     75     public boolean isConnectedToCar() {
     76         // for embedded, connected to service means connected to car.
     77         return mCar.isConnected();
     78     }
     79 
     80     @Override
     81     public int getCarConnectionType() throws CarNotConnectedException {
     82         return mCar.getCarConnectionType();
     83     }
     84 
     85     @Override
     86     public void registerCarConnectionListener(final CarConnectionListener listener)
     87             throws CarNotConnectedException {
     88         synchronized (this) {
     89             mCarConnectionListeners.add(listener);
     90         }
     91         // car service connection is checked when this is called. So just dispatch it.
     92         mHandler.dispatchCarConnectionCall(listener, getCarConnectionType());
     93     }
     94 
     95     @Override
     96     public void unregisterCarConnectionListener(CarConnectionListener listener) {
     97         synchronized (this) {
     98             mCarConnectionListeners.remove(listener);
     99         }
    100     }
    101 
    102     @Override
    103     public Object getCarManager(String serviceName) throws CarNotConnectedException {
    104         Object manager;
    105         try {
    106             manager = mCar.getCarManager(serviceName);
    107         } catch (android.car.CarNotConnectedException e) {
    108             throw new CarNotConnectedException(e);
    109         }
    110 
    111         if (manager == null) {
    112             return null;
    113         }
    114         // For publicly available versions, return wrapper version.
    115         switch (serviceName) {
    116         case Car.AUDIO_SERVICE:
    117             return new CarAudioManagerEmbedded(manager);
    118         case Car.SENSOR_SERVICE:
    119             return new CarSensorManagerEmbedded(manager);
    120         case Car.INFO_SERVICE:
    121             return new CarInfoManagerEmbedded(manager);
    122         case Car.APP_CONTEXT_SERVICE:
    123             return new CarAppContextManagerEmbedded(manager);
    124         case Car.PACKAGE_SERVICE:
    125             return new CarPackageManagerEmbedded(manager);
    126         case Car.CAR_NAVIGATION_SERVICE:
    127             return new CarNavigationManagerEmbedded(manager);
    128         default:
    129             return manager;
    130         }
    131     }
    132 
    133     private static class CallbackHandler extends Handler {
    134 
    135         private  static final int MSG_DISPATCH_CAR_CONNECTION = 0;
    136 
    137         private CallbackHandler(Looper looper) {
    138             super(looper);
    139         }
    140 
    141         private void dispatchCarConnectionCall(CarConnectionListener listener, int connectionType) {
    142             sendMessage(obtainMessage(MSG_DISPATCH_CAR_CONNECTION, connectionType, 0, listener));
    143         }
    144 
    145         @Override
    146         public void handleMessage(Message msg) {
    147             switch (msg.what) {
    148                 case MSG_DISPATCH_CAR_CONNECTION:
    149                     CarConnectionListener listener = (CarConnectionListener) msg.obj;
    150                     listener.onConnected(msg.arg1);
    151                     break;
    152             }
    153         }
    154     }
    155 }
    156