如何在 Android Wearable 中访问心率传感器？
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How to access heart rate sensor in Android Wearable?
提问by wonglik
I am having problems accessing heart rate sensor on Moto 360.
我在访问 Moto 360 上的心率传感器时遇到问题。
I tried following things :
我尝试了以下事情：
Sensor mHeartRateSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_HEART_RATE);
mSensorManager.registerListener(this, mHeartRateSensor, SensorManager.SENSOR_DELAY_NORMAL);
and then implement SensorEventListener interface :
然后实现 SensorEventListener 接口：
@Override
public void onSensorChanged(SensorEvent event) {
String TAG = "tag";
Log.i(TAG, "--------------------------");
Log.i(TAG, msg);
Log.i(TAG, ""+ event.sensor.getType());
Log.i("live","--------------");
And what is strange to me I do not get any messages at all (not only heart rate).
对我来说奇怪的是我根本没有收到任何消息（不仅是心率）。
Also I tried listing all sensors and it does not show Heart rate sensor on the list.
我还尝试列出所有传感器，但列表中没有显示心率传感器。
Of course I've added persmissions
当然我已经添加了权限
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.watchtest" >
<uses-feature android:name="android.hardware.type.watch" />
<uses-permission android:name="android.permission.BODY_SENSORS" />
Any ideas ?
有任何想法吗 ？
thanks.
谢谢。
w.
w.
采纳答案by wonglik
As @Kent and @Murphy suggested, updated SDK was the solution. In my case I needed to drop the project and create new from scratch as even with updated SDK old one did not work.
正如@Kent 和@Murphy 所建议的，更新的SDK 是解决方案。就我而言，我需要放弃该项目并从头开始创建新项目，因为即使使用更新的 SDK 旧版本也无法正常工作。
回答by Alexander K
Started to work for me after I did the following:
在我执行以下操作后开始为我工作：
Uninstalled my app from the watch with
adb -s localhost:4444 uninstall com.example.android.wearable.jumpingHymanAdded permissions to get the heart rate sensor
<uses-permission android:name="android.permission.BODY_SENSORS"/>Set the min and target SDK version to match the watch
android:minSdkVersion="20" android:targetSdkVersion="20"
从手表上卸载我的应用程序
adb -s localhost:4444 uninstall com.example.android.wearable.jumpingHyman添加了获取心率传感器的权限
<uses-permission android:name="android.permission.BODY_SENSORS"/>设置最小和目标 SDK 版本以匹配手表
android:minSdkVersion="20" android:targetSdkVersion="20"
Started the app again. I received the heart rate sensor with Sensor.TYPE_HEART_RATE and I started to receive its readings. Although they were far from good. There were a lot of readings, but they were just the same, limited to these 5 values:
再次启动应用程序。我收到了带有 Sensor.TYPE_HEART_RATE 的心率传感器，并开始接收它的读数。虽然他们差得很远。有很多读数，但它们都一样，仅限于这 5 个值：
heartRate onSensorChanged values = [0.0], accuracy = 0, sensor = {Sensor name="Heart Rate Sensor", vendor="Motorola", version=1, type=21, maxRange=65535.0, resolution=1.0, power=0.45, minDelay=0}
heartRate onSensorChanged values = [53.0], accuracy = 2, sensor = {Sensor name="Heart Rate Sensor", vendor="Motorola", version=1, type=21, maxRange=65535.0, resolution=1.0, power=0.45, minDelay=0}
heartRate onSensorChanged values = [54.0], accuracy = 2, sensor = {Sensor name="Heart Rate Sensor", vendor="Motorola", version=1, type=21, maxRange=65535.0, resolution=1.0, power=0.45, minDelay=0}
heartRate onSensorChanged values = [55.0], accuracy = 2, sensor = {Sensor name="Heart Rate Sensor", vendor="Motorola", version=1, type=21, maxRange=65535.0, resolution=1.0, power=0.45, minDelay=0}
heartRate onSensorChanged values = [77.0], accuracy = 1, sensor = {Sensor name="Heart Rate Sensor", vendor="Motorola", version=1, type=21, maxRange=65535.0, resolution=1.0, power=0.45, minDelay=0}
Most of the time I was getting the same 53.0 value which doesn't seem to be my real heart rate. 77 could have been the one.
大多数情况下，我都得到了相同的 53.0 值，这似乎不是我的真实心率。77本来可以是一个。
回答by Uwe Post
I had quite a similar problem on the Moto 360. The sensor always returned 0.0f as a value.
我在 Moto 360 上遇到了类似的问题。传感器总是返回 0.0f 作为值。
Then I waited for two minutes, and suddenly values!=0 came in. It seems that this sensor needs a "warmup" before showing anything. Not really astonishing if you take into account that it measures something happening roughly once a second with the unit "beats per minute". It cannot be reliable before one or two minutes have passed. And each app has its own measurement: It doesn't matter if another heartbeat app is also running (like the Moto Body thing).
然后我等了两分钟，突然values!=0进来了。看来这个sensor在显示任何东西之前需要“预热”。如果您考虑到它以“每分钟节拍数”为单位测量大约每秒发生一次的事情，这并不令人惊讶。在一两分钟过去之前，它是不可靠的。并且每个应用程序都有自己的度量：另一个心跳应用程序是否也在运行并不重要（例如 Moto Body 的东西）。
This also means that you mustcreate a service to listen to the sensor (and a binder to pass the sensor's value to your activity or your phone).
这也意味着您必须创建一个服务来监听传感器（以及一个将传感器的值传递给您的活动或手机的绑定器）。
Have a look at the demo project I shared on github: https://github.com/upost/MyHeartbeat
看看我在github上分享的演示项目：https: //github.com/upost/MyHeartbeat
回答by mangledBadger
So, I came here, with the same problem and the simple solution is to remove the application from the watch using the adb:
所以，我来到这里，遇到同样的问题，简单的解决方案是使用 adb 从手表中删除应用程序：
adb -s localhost:4444 uninstall com.*packagename*
Then simply reinstall it using android studio, eclipse or whatever you used originally.
然后只需使用 android studio、eclipse 或您最初使用的任何东西重新安装它。
Thanks to Alexander K for this solution
感谢 Alexander K 提供的解决方案
