| /* |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.server.location.injector; |
| |
| import static android.os.PowerManager.locationPowerSaveModeToString; |
| |
| import static com.android.server.location.LocationManagerService.D; |
| import static com.android.server.location.LocationManagerService.TAG; |
| import static com.android.server.location.eventlog.LocationEventLog.EVENT_LOG; |
| |
| import android.os.PowerManager.LocationPowerSaveMode; |
| import android.util.Log; |
| |
| import java.util.concurrent.CopyOnWriteArrayList; |
| |
| /** |
| * Provides accessors and listeners for location power save mode. |
| */ |
| public abstract class LocationPowerSaveModeHelper { |
| |
| /** |
| * Listener for location power save mode changes. |
| */ |
| public interface LocationPowerSaveModeChangedListener { |
| /** |
| * Called when the location power save mode changes. |
| */ |
| void onLocationPowerSaveModeChanged(@LocationPowerSaveMode int locationPowerSaveMode); |
| } |
| |
| private final CopyOnWriteArrayList<LocationPowerSaveModeChangedListener> mListeners; |
| |
| public LocationPowerSaveModeHelper() { |
| mListeners = new CopyOnWriteArrayList<>(); |
| } |
| |
| /** |
| * Add a listener for changes to location power save mode. Callbacks occur on an unspecified |
| * thread. |
| */ |
| public final void addListener(LocationPowerSaveModeChangedListener listener) { |
| mListeners.add(listener); |
| } |
| |
| /** |
| * Removes a listener for changes to location power save mode. |
| */ |
| public final void removeListener(LocationPowerSaveModeChangedListener listener) { |
| mListeners.remove(listener); |
| } |
| |
| protected final void notifyLocationPowerSaveModeChanged( |
| @LocationPowerSaveMode int locationPowerSaveMode) { |
| if (D) { |
| Log.d(TAG, "location power save mode is now " + locationPowerSaveModeToString( |
| locationPowerSaveMode)); |
| } |
| EVENT_LOG.logLocationPowerSaveMode(locationPowerSaveMode); |
| |
| for (LocationPowerSaveModeChangedListener listener : mListeners) { |
| listener.onLocationPowerSaveModeChanged(locationPowerSaveMode); |
| } |
| } |
| |
| /** |
| * Returns the current location power save mode. |
| */ |
| @LocationPowerSaveMode |
| public abstract int getLocationPowerSaveMode(); |
| } |