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 17 package com.android.server.location; 18 19 import android.location.GnssNavigationMessage; 20 import android.location.IGnssNavigationMessageListener; 21 import android.os.Handler; 22 import android.os.RemoteException; 23 import 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 */ 32 public abstract class GnssNavigationMessageProvider 33 extends RemoteListenerHelper<IGnssNavigationMessageListener> { 34 private static final String TAG = "GnssNavigationMessageProvider"; 35 GnssNavigationMessageProvider(Handler handler)36 protected GnssNavigationMessageProvider(Handler handler) { 37 super(handler, TAG); 38 } 39 onNavigationMessageAvailable(final GnssNavigationMessage event)40 public void onNavigationMessageAvailable(final GnssNavigationMessage event) { 41 ListenerOperation<IGnssNavigationMessageListener> operation = 42 new ListenerOperation<IGnssNavigationMessageListener>() { 43 @Override 44 public void execute(IGnssNavigationMessageListener listener) 45 throws RemoteException { 46 listener.onGnssNavigationMessageReceived(event); 47 } 48 }; 49 foreach(operation); 50 } 51 onCapabilitiesUpdated(boolean isGnssNavigationMessageSupported)52 public void onCapabilitiesUpdated(boolean isGnssNavigationMessageSupported) { 53 setSupported(isGnssNavigationMessageSupported); 54 updateResult(); 55 } 56 onGpsEnabledChanged()57 public void onGpsEnabledChanged() { 58 if (tryUpdateRegistrationWithService()) { 59 updateResult(); 60 } 61 } 62 63 @Override getHandlerOperation(int result)64 protected ListenerOperation<IGnssNavigationMessageListener> getHandlerOperation(int result) { 65 int status; 66 switch (result) { 67 case RESULT_SUCCESS: 68 status = GnssNavigationMessage.Callback.STATUS_READY; 69 break; 70 case RESULT_NOT_AVAILABLE: 71 case RESULT_NOT_SUPPORTED: 72 case RESULT_INTERNAL_ERROR: 73 status = GnssNavigationMessage.Callback.STATUS_NOT_SUPPORTED; 74 break; 75 case RESULT_GPS_LOCATION_DISABLED: 76 status = GnssNavigationMessage.Callback.STATUS_LOCATION_DISABLED; 77 break; 78 case RESULT_UNKNOWN: 79 return null; 80 default: 81 Log.v(TAG, "Unhandled addListener result: " + result); 82 return null; 83 } 84 return new StatusChangedOperation(status); 85 } 86 87 private static class StatusChangedOperation 88 implements ListenerOperation<IGnssNavigationMessageListener> { 89 private final int mStatus; 90 StatusChangedOperation(int status)91 public StatusChangedOperation(int status) { 92 mStatus = status; 93 } 94 95 @Override execute(IGnssNavigationMessageListener listener)96 public void execute(IGnssNavigationMessageListener listener) throws RemoteException { 97 listener.onStatusChanged(mStatus); 98 } 99 } 100 } 101