ProximitySensorManager.java revision 7cc70b4f0ad1064a4a0dce6056ad82b205887160 
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
17package com.android.server.telecom;
18
19import android.content.Context;
20import android.os.PowerManager;
21
22/**
23 * This class manages the proximity sensor and allows callers to turn it on and off.
24 */
25public 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.v(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