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.telecom; 18 19 import android.content.Context; 20 import android.os.PowerManager; 21 22 /** 23 * This class manages the proximity sensor and allows callers to turn it on and off. 24 */ 25 public class ProximitySensorManager extends CallsManagerListenerBase { 26 private static final String TAG = ProximitySensorManager.class.getSimpleName(); 27 28 private final PowerManager.WakeLock mProximityWakeLock; 29 private final CallsManager mCallsManager; 30 31 public ProximitySensorManager(Context context, CallsManager callsManager) { 32 PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE); 33 34 if (pm.isWakeLockLevelSupported(PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK)) { 35 mProximityWakeLock = pm.newWakeLock( 36 PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK, TAG); 37 } else { 38 mProximityWakeLock = null; 39 } 40 41 mCallsManager = callsManager; 42 Log.d(this, "onCreate: mProximityWakeLock: ", mProximityWakeLock); 43 } 44 45 @Override 46 public void onCallRemoved(Call call) { 47 if (mCallsManager.getCalls().isEmpty()) { 48 Log.i(this, "All calls removed, resetting proximity sensor to default state"); 49 turnOff(true); 50 } 51 super.onCallRemoved(call); 52 } 53 54 /** 55 * Turn the proximity sensor on. 56 */ 57 void turnOn() { 58 if (mCallsManager.getCalls().isEmpty()) { 59 Log.w(this, "Asking to turn on prox sensor without a call? I don't think so."); 60 return; 61 } 62 63 if (mProximityWakeLock == null) { 64 return; 65 } 66 if (!mProximityWakeLock.isHeld()) { 67 Log.i(this, "Acquiring proximity wake lock"); 68 mProximityWakeLock.acquire(); 69 } else { 70 Log.i(this, "Proximity wake lock already acquired"); 71 } 72 } 73 74 /** 75 * Turn the proximity sensor off. 76 * @param screenOnImmediately 77 */ 78 void turnOff(boolean screenOnImmediately) { 79 if (mProximityWakeLock == null) { 80 return; 81 } 82 if (mProximityWakeLock.isHeld()) { 83 Log.i(this, "Releasing proximity wake lock"); 84 int flags = 85 (screenOnImmediately ? 0 : PowerManager.RELEASE_FLAG_WAIT_FOR_NO_PROXIMITY); 86 mProximityWakeLock.release(flags); 87 } else { 88 Log.i(this, "Proximity wake lock already released"); 89 } 90 } 91 } 92