Android Wear os 在设备上试用时显示心率为 1

Question

我为 Wear os 制作了一个简单的应用程序，它在 textView 上显示心率。该应用程序运行完美，没有任何错误，但在显示值时它只显示 1。传感器可以与其他应用程序正常工作。

public class MainActivity extends WearableActivity implements SensorEventListener{

private TextView mTextView;
private TextView mTextViewHeart;
private SensorManager mSensorManager;
private Sensor mHeartRateSensor;

@RequiresApi(api = Build.VERSION_CODES.N)
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mTextView = findViewById(R.id.text);

    mTextViewHeart = findViewById(R.id.heart);

    // Enables Always-on
    setAmbientEnabled();
    mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
    assert mSensorManager != null;
    mHeartRateSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_HEART_BEAT);
}

public final void onAccuracyChanged(Sensor sensor, int accuracy) {
    // Do something here if sensor accuracy changes.
}

@SuppressLint("SetTextI18n")
public final void onSensorChanged(SensorEvent event) {
    float mHeartRateFloat = event.values[0];

    int mHeartRate = Math.round(mHeartRateFloat);

    mTextViewHeart.setText(Integer.toString(mHeartRate));
}

@Override
protected void onResume() {
    super.onResume();
    mSensorManager.registerListener(this, mHeartRateSensor, SensorManager.SENSOR_DELAY_NORMAL);
}

@Override
protected void onPause() {
    super.onPause();
    mSensorManager.unregisterListener(this);
}

Answer 1

这是所需的传感器类型吗？

Sensor.TYPE_HEART_BEAT

你可以考虑改成

mHeartRateSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_HEART_RATE);