1 /*
2  * Copyright (C) 2016 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.car;
18 
19 import android.annotation.IntDef;
20 import android.app.UiModeManager;
21 import android.car.hardware.CarSensorEvent;
22 import android.car.hardware.CarSensorManager;
23 import android.car.hardware.ICarSensorEventListener;
24 import android.content.Context;
25 import android.util.Log;
26 
27 import java.io.PrintWriter;
28 import java.lang.annotation.Retention;
29 import java.lang.annotation.RetentionPolicy;
30 import java.util.List;
31 
32 
33 public class CarNightService implements CarServiceBase {
34 
35     public static final boolean DBG = false;
36 
37     @IntDef({FORCED_SENSOR_MODE, FORCED_DAY_MODE, FORCED_NIGHT_MODE})
38     @Retention(RetentionPolicy.SOURCE)
39     public @interface DayNightSensorMode {}
40 
41     public static final int FORCED_SENSOR_MODE = 0;
42     public static final int FORCED_DAY_MODE = 1;
43     public static final int FORCED_NIGHT_MODE = 2;
44 
45     private int mNightSetting = UiModeManager.MODE_NIGHT_YES;
46     private int mForcedMode = FORCED_SENSOR_MODE;
47     private final Context mContext;
48     private final UiModeManager mUiModeManager;
49     private CarSensorService mCarSensorService;
50 
51     private final ICarSensorEventListener mICarSensorEventListener =
52             new ICarSensorEventListener.Stub() {
53         @Override
54         public void onSensorChanged(List<CarSensorEvent> events) {
55             if (!events.isEmpty()) {
56                 CarSensorEvent event = events.get(events.size() - 1);
57                 handleSensorEvent(event);
58             }
59         }
60     };
61 
handleSensorEvent(CarSensorEvent event)62     public synchronized void handleSensorEvent(CarSensorEvent event) {
63         if (event == null) {
64             return;
65         }
66         if (event.sensorType == CarSensorManager.SENSOR_TYPE_NIGHT) {
67             if (event.intValues[0] == 1) {
68                 mNightSetting = UiModeManager.MODE_NIGHT_YES;
69             }
70             else {
71                 mNightSetting = UiModeManager.MODE_NIGHT_NO;
72             }
73             if (mUiModeManager != null && (mForcedMode == FORCED_SENSOR_MODE)) {
74                 mUiModeManager.setNightMode(mNightSetting);
75             }
76         }
77     }
78 
forceDayNightMode(@ayNightSensorMode int mode)79     public synchronized int forceDayNightMode(@DayNightSensorMode int mode) {
80         if (mUiModeManager == null) {
81             return -1;
82         }
83         int resultMode;
84         switch (mode) {
85             case FORCED_SENSOR_MODE:
86                 resultMode = mNightSetting;
87                 mForcedMode = FORCED_SENSOR_MODE;
88                 break;
89             case FORCED_DAY_MODE:
90                 resultMode = UiModeManager.MODE_NIGHT_NO;
91                 mForcedMode = FORCED_DAY_MODE;
92                 break;
93             case FORCED_NIGHT_MODE:
94                 resultMode = UiModeManager.MODE_NIGHT_YES;
95                 mForcedMode = FORCED_NIGHT_MODE;
96                 break;
97             default:
98                 Log.e(CarLog.TAG_SENSOR, "Unknown forced day/night mode " + mode);
99                 return -1;
100         }
101         mUiModeManager.setNightMode(resultMode);
102         return mUiModeManager.getNightMode();
103     }
104 
CarNightService(Context context, CarSensorService sensorService)105     CarNightService(Context context, CarSensorService sensorService) {
106         mContext = context;
107         mCarSensorService = sensorService;
108         mUiModeManager = (UiModeManager) mContext.getSystemService(Context.UI_MODE_SERVICE);
109         if (mUiModeManager == null) {
110             Log.w(CarLog.TAG_SENSOR,"Failed to get UI_MODE_SERVICE");
111         }
112     }
113 
114     @Override
init()115     public synchronized void init() {
116         if (DBG) {
117             Log.d(CarLog.TAG_SENSOR,"CAR dayNight init.");
118         }
119         mCarSensorService.registerOrUpdateSensorListener(CarSensorManager.SENSOR_TYPE_NIGHT,
120                 CarSensorManager.SENSOR_RATE_NORMAL, mICarSensorEventListener);
121         CarSensorEvent currentState = mCarSensorService.getLatestSensorEvent(
122                 CarSensorManager.SENSOR_TYPE_NIGHT);
123         handleSensorEvent(currentState);
124     }
125 
126     @Override
release()127     public synchronized void release() {
128     }
129 
130     @Override
dump(PrintWriter writer)131     public synchronized void dump(PrintWriter writer) {
132         writer.println("*DAY NIGHT POLICY*");
133         writer.println("Mode:" + ((mNightSetting == UiModeManager.MODE_NIGHT_YES) ? "night" : "day")
134                 );
135         writer.println("Forced Mode? " + (mForcedMode == FORCED_SENSOR_MODE ? "false"
136                 : (mForcedMode == FORCED_DAY_MODE ? "day" : "night")));
137     }
138 }
139