| /* |
| * 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 com.android.server.location.LocationManagerService.D; |
| import static com.android.server.location.LocationManagerService.TAG; |
| |
| import android.util.Log; |
| |
| import java.util.concurrent.CopyOnWriteArrayList; |
| |
| /** |
| * Provides accessors and listeners for screen interactive state (screen on/off). |
| */ |
| public abstract class ScreenInteractiveHelper { |
| |
| /** |
| * Listener for screen interactive changes. |
| */ |
| public interface ScreenInteractiveChangedListener { |
| /** |
| * Called when the screen interative state changes. |
| */ |
| void onScreenInteractiveChanged(boolean isInteractive); |
| } |
| |
| private final CopyOnWriteArrayList<ScreenInteractiveChangedListener> mListeners; |
| |
| public ScreenInteractiveHelper() { |
| mListeners = new CopyOnWriteArrayList<>(); |
| } |
| |
| /** |
| * Add a listener for changes to screen interactive state. Callbacks occur on an unspecified |
| * thread. |
| */ |
| public final void addListener(ScreenInteractiveChangedListener listener) { |
| mListeners.add(listener); |
| } |
| |
| /** |
| * Removes a listener for changes to screen interactive state. |
| */ |
| public final void removeListener(ScreenInteractiveChangedListener listener) { |
| mListeners.remove(listener); |
| } |
| |
| protected final void notifyScreenInteractiveChanged(boolean interactive) { |
| if (D) { |
| Log.d(TAG, "screen interactive is now " + interactive); |
| } |
| |
| for (ScreenInteractiveChangedListener listener : mListeners) { |
| listener.onScreenInteractiveChanged(interactive); |
| } |
| } |
| |
| /** |
| * Returns true if the screen is currently interactive, and false otherwise. |
| */ |
| public abstract boolean isInteractive(); |
| } |