Home | History | Annotate | Download | only in telecom 
      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 
     30     public ProximitySensorManager(Context context) {
     31         PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
     32 
     33         if (pm.isWakeLockLevelSupported(PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK)) {
     34             mProximityWakeLock = pm.newWakeLock(
     35                     PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK, TAG);
     36         } else {
     37             mProximityWakeLock = null;
     38         }
     39         Log.d(this, "onCreate: mProximityWakeLock: ", mProximityWakeLock);
     40     }
     41 
     42     @Override
     43     public void onCallRemoved(Call call) {
     44         if (CallsManager.getInstance().getCalls().isEmpty()) {
     45             Log.i(this, "All calls removed, resetting proximity sensor to default state");
     46             turnOff(true);
     47         }
     48         super.onCallRemoved(call);
     49     }
     50 
     51     /**
     52      * Turn the proximity sensor on.
     53      */
     54     void turnOn() {
     55         if (CallsManager.getInstance().getCalls().isEmpty()) {
     56             Log.w(this, "Asking to turn on prox sensor without a call? I don't think so.");
     57             return;
     58         }
     59 
     60         if (mProximityWakeLock == null) {
     61             return;
     62         }
     63         if (!mProximityWakeLock.isHeld()) {
     64             Log.i(this, "Acquiring proximity wake lock");
     65             mProximityWakeLock.acquire();
     66         } else {
     67             Log.i(this, "Proximity wake lock already acquired");
     68         }
     69     }
     70 
     71     /**
     72      * Turn the proximity sensor off.
     73      * @param screenOnImmediately
     74      */
     75     void turnOff(boolean screenOnImmediately) {
     76         if (mProximityWakeLock == null) {
     77             return;
     78         }
     79         if (mProximityWakeLock.isHeld()) {
     80             Log.i(this, "Releasing proximity wake lock");
     81             int flags =
     82                 (screenOnImmediately ? 0 : PowerManager.RELEASE_FLAG_WAIT_FOR_NO_PROXIMITY);
     83             mProximityWakeLock.release(flags);
     84         } else {
     85             Log.i(this, "Proximity wake lock already released");
     86         }
     87     }
     88 }
     89