1 /*
2  * Copyright (C) 2018 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.tradefed.device;
18 
19 import com.android.ddmlib.AdbCommandRejectedException;
20 import com.android.ddmlib.IDevice;
21 import com.android.ddmlib.MultiLineReceiver;
22 import com.android.ddmlib.ShellCommandUnresponsiveException;
23 import com.android.ddmlib.TimeoutException;
24 import com.android.tradefed.log.LogUtil.CLog;
25 
26 import java.io.IOException;
27 import java.util.regex.Matcher;
28 import java.util.regex.Pattern;
29 
30 public class BatteryTemperature {
31 
32     /** Parse the output of "adb shell dumpsys battery" to collect the temperature. */
33     class DumpsysBatteryTemperatureReceiver extends MultiLineReceiver {
34         /*
35          * The temperature is printed as numeric value in tenths of a degree, i.e.
36          * 512 indicates 51.2°C.
37          */
38         private static final int DUMPSYS_BATTERY_TEMP_SCALE = 10;
39 
40         /* The temperature is listed on a single line, like "temperature: 512" */
41         private static final String BATTERY_REGEX = "temperature: ([0-9]+)";
42 
43         private int mDeviceBatteryTemp = 0;
44 
getDeviceBatteryTemp()45         public int getDeviceBatteryTemp() {
46             return mDeviceBatteryTemp;
47         }
48 
49         @Override
isCancelled()50         public boolean isCancelled() {
51             return false;
52         }
53 
54         @Override
processNewLines(String[] lines)55         public void processNewLines(String[] lines) {
56             for (String line : lines) {
57                 Pattern p = Pattern.compile(BATTERY_REGEX);
58                 Matcher m = p.matcher(line);
59                 if (m.find()) {
60                     String tempString = m.group(1);
61                     try {
62                         mDeviceBatteryTemp = Integer.parseInt(tempString);
63                         mDeviceBatteryTemp /= DUMPSYS_BATTERY_TEMP_SCALE;
64                     } catch (NumberFormatException e) {
65                         CLog.w("Failed to parse battery temperature: %s", line);
66                     }
67                 }
68             }
69         }
70     }
71 
72     /**
73      * Get the device's battery temperature, in degrees celsius.
74      *
75      * <p>TODO: Implement as ddmlib {@code IDevice#getBatteryTemperature()}
76      *
77      * @return The device's temperature, in degrees celsius. If unavailable, the return value is 0.
78      */
getBatteryTemperature(IDevice device)79     public Integer getBatteryTemperature(IDevice device) {
80         DumpsysBatteryTemperatureReceiver receiver = new DumpsysBatteryTemperatureReceiver();
81 
82         try {
83             device.executeShellCommand("dumpsys battery", receiver);
84         } catch (TimeoutException
85                 | AdbCommandRejectedException
86                 | ShellCommandUnresponsiveException
87                 | IOException e) {
88             return 0;
89         }
90 
91         return receiver.getDeviceBatteryTemp();
92     }
93 }
94