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@mjohnsullivan
Last active March 1, 2024 01:28
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Android Wear activity that reads and displays sensor data from the device
package com.example.wear;
import android.app.Activity;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.support.wearable.view.WatchViewStub;
import android.util.Log;
import android.view.WindowManager;
import android.widget.TextView;
import java.text.SimpleDateFormat;
import java.util.Calendar;
public class MainActivity extends Activity implements SensorEventListener {
private static final String TAG = "MainActivity";
private TextView mTextViewStepCount;
private TextView mTextViewStepDetect;
private TextView mTextViewHeart;
@Override
protected void onCreate(Bundle savedInstanceState) {
// Keep the Wear screen always on (for testing only!)
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final WatchViewStub stub = (WatchViewStub) findViewById(R.id.watch_view_stub);
stub.setOnLayoutInflatedListener(new WatchViewStub.OnLayoutInflatedListener() {
@Override
public void onLayoutInflated(WatchViewStub stub) {
mTextViewStepCount = (TextView) stub.findViewById(R.id.step_count);
mTextViewStepDetect = (TextView) stub.findViewById(R.id.step_detect);
mTextViewHeart = (TextView) stub.findViewById(R.id.heart);
getStepCount();
}
});
}
private void getStepCount() {
SensorManager mSensorManager = ((SensorManager)getSystemService(SENSOR_SERVICE));
Sensor mHeartRateSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_HEART_RATE);
Sensor mStepCountSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_STEP_COUNTER);
Sensor mStepDetectSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_STEP_DETECTOR);
mSensorManager.registerListener(this, mHeartRateSensor, SensorManager.SENSOR_DELAY_NORMAL);
mSensorManager.registerListener(this, mStepCountSensor, SensorManager.SENSOR_DELAY_NORMAL);
mSensorManager.registerListener(this, mStepDetectSensor, SensorManager.SENSOR_DELAY_NORMAL);
}
private String currentTimeStr() {
Calendar c = Calendar.getInstance();
SimpleDateFormat df = new SimpleDateFormat("HH:mm:ss");
return df.format(c.getTime());
}
public void onAccuracyChanged(Sensor sensor, int accuracy) {
Log.d(TAG, "onAccuracyChanged - accuracy: " + accuracy);
}
public void onSensorChanged(SensorEvent event) {
if (event.sensor.getType() == Sensor.TYPE_HEART_RATE) {
String msg = "" + (int)event.values[0];
mTextViewHeart.setText(msg);
Log.d(TAG, msg);
}
else if (event.sensor.getType() == Sensor.TYPE_STEP_COUNTER) {
String msg = "Count: " + (int)event.values[0];
mTextViewStepCount.setText(msg);
Log.d(TAG, msg);
}
else if (event.sensor.getType() == Sensor.TYPE_STEP_DETECTOR) {
String msg = "Detected at " + currentTimeStr();
mTextViewStepDetect.setText(msg);
Log.d(TAG, msg);
}
else
Log.d(TAG, "Unknown sensor type");
}
}
@mjohnsullivan
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Author

This code is for Android Wear.

You can easily pass the collected data directly over the network to a server on Android Wear 2.0; for 1.0 you'll need to use the Data Layer API to pass data to an Android companion app on the phone.

@MujasSam
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Hi Folks,
I tried this code and observed that in my Moto 360 Sport watch the heart rate is keep triggers onSensorChanged() even I am not wearing the watch. This should give me the heart rate only when i tied up the watch.

@cengm
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cengm commented Jun 9, 2018

Dont forget to ask permission before read Sensor value.
`public void permissionRequest(){

    if (checkSelfPermission(Manifest.permission.BODY_SENSORS)
            != PackageManager.PERMISSION_GRANTED) {

        requestPermissions(
                new String[]{Manifest.permission.BODY_SENSORS},
                MY_PERMISSIONS_REQUEST_BODY_SENSOR);
    }
    else{
        Log.d(TAG,"ALREADY GRANTED");
    }
}`

OR you can enable it from Settings>Apps>YOUR_APP>Permissions>Sensor

@lailaalqam
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Hi mjohnsullivan
What kind of android watch using?
You can use any Android watch for this code?

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