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