| /* |
| * Copyright (C) 2018 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 android.hardware; |
| |
| import android.annotation.NonNull; |
| import android.annotation.RequiresPermission; |
| import android.annotation.SystemService; |
| import android.content.Context; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.util.ArrayMap; |
| |
| import com.android.internal.annotations.GuardedBy; |
| |
| /** |
| * This class provides access to the sensor privacy services; sensor privacy allows the |
| * user to disable access to all sensors on the device. This class provides methods to query the |
| * current state of sensor privacy as well as to register / unregister for notification when |
| * the sensor privacy state changes. |
| * |
| * @hide |
| */ |
| @SystemService(Context.SENSOR_PRIVACY_SERVICE) |
| public final class SensorPrivacyManager { |
| |
| /** |
| * A class implementing this interface can register with the {@link |
| * android.hardware.SensorPrivacyManager} to receive notification when the sensor privacy |
| * state changes. |
| */ |
| public interface OnSensorPrivacyChangedListener { |
| /** |
| * Callback invoked when the sensor privacy state changes. |
| * |
| * @param enabled true if sensor privacy is enabled, false otherwise. |
| */ |
| void onSensorPrivacyChanged(boolean enabled); |
| } |
| |
| private static final Object sInstanceLock = new Object(); |
| |
| @GuardedBy("sInstanceLock") |
| private static SensorPrivacyManager sInstance; |
| |
| @NonNull |
| private final Context mContext; |
| |
| @NonNull |
| private final ISensorPrivacyManager mService; |
| |
| @NonNull |
| private final ArrayMap<OnSensorPrivacyChangedListener, ISensorPrivacyListener> mListeners; |
| |
| /** |
| * Private constructor to ensure only a single instance is created. |
| */ |
| private SensorPrivacyManager(Context context, ISensorPrivacyManager service) { |
| mContext = context; |
| mService = service; |
| mListeners = new ArrayMap<>(); |
| } |
| |
| /** |
| * Returns the single instance of the SensorPrivacyManager. |
| */ |
| public static SensorPrivacyManager getInstance(Context context) { |
| synchronized (sInstanceLock) { |
| if (sInstance == null) { |
| try { |
| IBinder b = ServiceManager.getServiceOrThrow(Context.SENSOR_PRIVACY_SERVICE); |
| ISensorPrivacyManager service = ISensorPrivacyManager.Stub.asInterface(b); |
| sInstance = new SensorPrivacyManager(context, service); |
| } catch (ServiceManager.ServiceNotFoundException e) { |
| throw new IllegalStateException(e); |
| } |
| } |
| return sInstance; |
| } |
| } |
| |
| /** |
| * Sets sensor privacy to the specified state. |
| * |
| * @param enable the state to which sensor privacy should be set. |
| */ |
| @RequiresPermission(android.Manifest.permission.MANAGE_SENSOR_PRIVACY) |
| public void setSensorPrivacy(boolean enable) { |
| try { |
| mService.setSensorPrivacy(enable); |
| } catch (RemoteException e) { |
| throw e.rethrowFromSystemServer(); |
| } |
| } |
| |
| /** |
| * Registers a new listener to receive notification when the state of sensor privacy |
| * changes. |
| * |
| * @param listener the OnSensorPrivacyChangedListener to be notified when the state of sensor |
| * privacy changes. |
| */ |
| public void addSensorPrivacyListener(final OnSensorPrivacyChangedListener listener) { |
| synchronized (mListeners) { |
| ISensorPrivacyListener iListener = mListeners.get(listener); |
| if (iListener == null) { |
| iListener = new ISensorPrivacyListener.Stub() { |
| @Override |
| public void onSensorPrivacyChanged(boolean enabled) { |
| listener.onSensorPrivacyChanged(enabled); |
| } |
| }; |
| mListeners.put(listener, iListener); |
| } |
| |
| try { |
| mService.addSensorPrivacyListener(iListener); |
| } catch (RemoteException e) { |
| throw e.rethrowFromSystemServer(); |
| } |
| } |
| } |
| |
| /** |
| * Unregisters the specified listener from receiving notifications when the state of sensor |
| * privacy changes. |
| * |
| * @param listener the OnSensorPrivacyChangedListener to be unregistered from notifications when |
| * sensor privacy changes. |
| */ |
| public void removeSensorPrivacyListener(OnSensorPrivacyChangedListener listener) { |
| synchronized (mListeners) { |
| ISensorPrivacyListener iListener = mListeners.get(listener); |
| if (iListener != null) { |
| mListeners.remove(iListener); |
| try { |
| mService.removeSensorPrivacyListener(iListener); |
| } catch (RemoteException e) { |
| throw e.rethrowFromSystemServer(); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Returns whether sensor privacy is currently enabled. |
| * |
| * @return true if sensor privacy is currently enabled, false otherwise. |
| */ |
| public boolean isSensorPrivacyEnabled() { |
| try { |
| return mService.isSensorPrivacyEnabled(); |
| } catch (RemoteException e) { |
| throw e.rethrowFromSystemServer(); |
| } |
| } |
| } |