Android Wear: Heart Rate and Samsung Gear Live. (basic example)

AndroidManifest.xml

<!-- Declare the permission for body sensor -->
<uses-permission android:name="android.permission.BODY_SENSORS" />

heart_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.wearable.view.WatchViewStub
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/watch_view_stub"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:rectLayout="@layout/rect_heart"
    app:roundLayout="@layout/round_heart"
    tools:context=".MyActivity"
    tools:deviceIds="wear">
</android.support.wearable.view.WatchViewStub>

MyActivity.java

public class MyActivity extends Activity implements SensorEventListener {

    //UI Elements
    private CircledImageView mCircledImageView;
    private TextView mTextView;

    //Sensor and SensorManager
    Sensor mHeartRateSensor;
    SensorManager mSensorManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.heart_layout);

        //Sensor and sensor manager
        mSensorManager = ((SensorManager)getSystemService(SENSOR_SERVICE));
        mHeartRateSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_HEART_RATE);

        //View
        final WatchViewStub stub = (WatchViewStub) findViewById(R.id.watch_view_stub);
        stub.setOnLayoutInflatedListener(new WatchViewStub.OnLayoutInflatedListener() {
            @Override
            public void onLayoutInflated(WatchViewStub stub) {
                mCircledImageView = (CircledImageView) stub.findViewById(R.id.circle);
                mTextView = (TextView) stub.findViewById(R.id.value);
            }
        });



    }

    @Override
    protected void onResume() {
        super.onResume();
        //Register the listener
        if (mSensorManager != null){
            mSensorManager.registerListener(this, mHeartRateSensor, SensorManager.SENSOR_DELAY_NORMAL);
        }
    }

    @Override
    protected void onPause() {
        super.onPause();
        //Unregister the listener
        if (mSensorManager!=null)
            mSensorManager.unregisterListener(this);
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        //Update your data. This check is very raw. You should improve it when the sensor is unable to calculate the heart rate
        if (event.sensor.getType() == Sensor.TYPE_HEART_RATE) {
            if ((int)event.values[0]>0) {
                mCircledImageView.setCircleColor(getResources().getColor(R.color.green));
                mTextView.setText("" + (int) event.values[0]);
            }
        }
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {

    }
}

round_heart.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:tools="http://schemas.android.com/tools"
                xmlns:app="http://schemas.android.com/apk/res-auto"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                tools:context=".MyActivity"
                tools:deviceIds="wear_round">


    <android.support.wearable.view.CircledImageView
        android:layout_centerInParent="true"
        android:layout_width="wrap_content"
        app:circle_radius="50dp"
        android:id="@+id/circle"
        app:circle_color="@color/light_grey"
        android:layout_height="wrap_content">

        <TextView
            android:layout_gravity="center"
            android:text="wait...."
            android:textColor="@color/black"
            android:textSize="20sp"
            android:id="@+id/value"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>


    </android.support.wearable.view.CircledImageView>

It doesn't work anymore - probably some update killed it.

Can you please tell why my samsung gear is not connecting with android studio since you worked on samsung gear. Please help me on that case. I turned on usb debugging in watch. Watch is connected with Samsung S4. Thanks