如何在Android Studio中获得每x秒的心率？

import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements SensorEventListener {
    private SensorManager sensorManager;
    private Sensor heartRateSensor;
    private TextView heartRateTextView;
    private Button startButton;
    private boolean isMonitoring = false;
    private Handler handler;
    private Runnable heartRateRunnable;

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

        heartRateTextView = findViewById(R.id.heartRateTextView);
        startButton = findViewById(R.id.startButton);

        sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
        heartRateSensor = sensorManager.getDefaultSensor(Sensor.TYPE_HEART_RATE);

        startButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (isMonitoring) {
                    stopMonitoring();
                } else {
                    startMonitoring();
                }
            }
        });

        handler = new Handler();
        heartRateRunnable = new Runnable() {
            @Override
            public void run() {
                // 获取心率数据并更新UI
                int heartRate = getHeartRateData();
                heartRateTextView.setText("心率：" + heartRate + " bpm");

                // 每x秒获取一次心率数据
                handler.postDelayed(this, 1000 * x);
            }
        };
    }

    private void startMonitoring() {
        isMonitoring = true;
        startButton.setText("停止监测");

        // 注册传感器监听器
        sensorManager.registerListener(this, heartRateSensor, SensorManager.SENSOR_DELAY_NORMAL);

        // 开始定时获取心率数据
        handler.post(heartRateRunnable);
    }

    private void stopMonitoring() {
        isMonitoring = false;
        startButton.setText("开始监测");

        // 注销传感器监听器
        sensorManager.unregisterListener(this);

        // 停止定时获取心率数据
        handler.removeCallbacks(heartRateRunnable);
    }

    private int getHeartRateData() {
        // 在这里获取心率数据的具体实现
        // 返回心率数据
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        // 在这里处理传感器数据的变化
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {
        // 在这里处理传感器精度的变化
    }

    @Override
    protected void onResume() {
        super.onResume();
        // 注册传感器监听器
        sensorManager.registerListener(this, heartRateSensor, SensorManager.SENSOR_DELAY_NORMAL);
    }

    @Override
    protected void onPause() {
        super.onPause();
        // 注销传感器监听器
        sensorManager.unregisterListener(this);
    }
}