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.location; 18 19import android.location.GpsNavigationMessageEvent; 20import android.location.IGpsNavigationMessageListener; 21import android.os.Handler; 22import android.os.RemoteException; 23import android.util.Log; 24 25/** 26 * An base implementation for GPS navigation messages provider. 27 * It abstracts out the responsibility of handling listeners, while still allowing technology 28 * specific implementations to be built. 29 * 30 * @hide 31 */ 32public abstract class GpsNavigationMessageProvider 33 extends RemoteListenerHelper<IGpsNavigationMessageListener> { 34 private static final String TAG = "GpsNavigationMessageProvider"; 35 36 public GpsNavigationMessageProvider(Handler handler) { 37 super(handler, TAG); 38 } 39 40 public void onNavigationMessageAvailable(final GpsNavigationMessageEvent event) { 41 ListenerOperation<IGpsNavigationMessageListener> operation = 42 new ListenerOperation<IGpsNavigationMessageListener>() { 43 @Override 44 public void execute(IGpsNavigationMessageListener listener) 45 throws RemoteException { 46 listener.onGpsNavigationMessageReceived(event); 47 } 48 }; 49 foreach(operation); 50 } 51 52 public void onCapabilitiesUpdated(boolean isGpsNavigationMessageSupported) { 53 int status = isGpsNavigationMessageSupported ? 54 GpsNavigationMessageEvent.STATUS_READY : 55 GpsNavigationMessageEvent.STATUS_NOT_SUPPORTED; 56 setSupported(isGpsNavigationMessageSupported, new StatusChangedOperation(status)); 57 } 58 59 @Override 60 protected ListenerOperation<IGpsNavigationMessageListener> getHandlerOperation(int result) { 61 final int status; 62 switch (result) { 63 case RESULT_SUCCESS: 64 status = GpsNavigationMessageEvent.STATUS_READY; 65 break; 66 case RESULT_NOT_AVAILABLE: 67 case RESULT_NOT_SUPPORTED: 68 case RESULT_INTERNAL_ERROR: 69 status = GpsNavigationMessageEvent.STATUS_NOT_SUPPORTED; 70 break; 71 case RESULT_GPS_LOCATION_DISABLED: 72 status = GpsNavigationMessageEvent.STATUS_GPS_LOCATION_DISABLED; 73 break; 74 default: 75 Log.v(TAG, "Unhandled addListener result: " + result); 76 return null; 77 } 78 return new StatusChangedOperation(status); 79 } 80 81 @Override 82 protected void handleGpsEnabledChanged(boolean enabled) { 83 int status = enabled ? 84 GpsNavigationMessageEvent.STATUS_READY : 85 GpsNavigationMessageEvent.STATUS_GPS_LOCATION_DISABLED; 86 foreach(new StatusChangedOperation(status)); 87 } 88 89 private class StatusChangedOperation 90 implements ListenerOperation<IGpsNavigationMessageListener> { 91 private final int mStatus; 92 93 public StatusChangedOperation(int status) { 94 mStatus = status; 95 } 96 97 @Override 98 public void execute(IGpsNavigationMessageListener listener) throws RemoteException { 99 listener.onStatusChanged(mStatus); 100 } 101 } 102} 103