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.GnssMeasurementsEvent; 20 import android.location.IGnssMeasurementsListener; 21 import android.os.Handler; 22 import android.os.RemoteException; 23 import android.util.Log; 24 25 /** 26 * An base implementation for GPS measurements 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 GnssMeasurementsProvider 33 extends RemoteListenerHelper<IGnssMeasurementsListener> { 34 private static final String TAG = "GnssMeasurementsProvider"; 35 GnssMeasurementsProvider(Handler handler)36 protected GnssMeasurementsProvider(Handler handler) { 37 super(handler, TAG); 38 } 39 onMeasurementsAvailable(final GnssMeasurementsEvent event)40 public void onMeasurementsAvailable(final GnssMeasurementsEvent event) { 41 ListenerOperation<IGnssMeasurementsListener> operation = 42 new ListenerOperation<IGnssMeasurementsListener>() { 43 @Override 44 public void execute(IGnssMeasurementsListener listener) throws RemoteException { 45 listener.onGnssMeasurementsReceived(event); 46 } 47 }; 48 foreach(operation); 49 } 50 onCapabilitiesUpdated(boolean isGnssMeasurementsSupported)51 public void onCapabilitiesUpdated(boolean isGnssMeasurementsSupported) { 52 setSupported(isGnssMeasurementsSupported); 53 updateResult(); 54 } 55 onGpsEnabledChanged()56 public void onGpsEnabledChanged() { 57 if (tryUpdateRegistrationWithService()) { 58 updateResult(); 59 } 60 } 61 62 @Override getHandlerOperation(int result)63 protected ListenerOperation<IGnssMeasurementsListener> getHandlerOperation(int result) { 64 int status; 65 switch (result) { 66 case RESULT_SUCCESS: 67 status = GnssMeasurementsEvent.Callback.STATUS_READY; 68 break; 69 case RESULT_NOT_AVAILABLE: 70 case RESULT_NOT_SUPPORTED: 71 case RESULT_INTERNAL_ERROR: 72 status = GnssMeasurementsEvent.Callback.STATUS_NOT_SUPPORTED; 73 break; 74 case RESULT_GPS_LOCATION_DISABLED: 75 status = GnssMeasurementsEvent.Callback.STATUS_LOCATION_DISABLED; 76 break; 77 case RESULT_UNKNOWN: 78 return null; 79 default: 80 Log.v(TAG, "Unhandled addListener result: " + result); 81 return null; 82 } 83 return new StatusChangedOperation(status); 84 } 85 86 private static class StatusChangedOperation 87 implements ListenerOperation<IGnssMeasurementsListener> { 88 private final int mStatus; 89 StatusChangedOperation(int status)90 public StatusChangedOperation(int status) { 91 mStatus = status; 92 } 93 94 @Override execute(IGnssMeasurementsListener listener)95 public void execute(IGnssMeasurementsListener listener) throws RemoteException { 96 listener.onStatusChanged(mStatus); 97 } 98 } 99 } 100