Android Step Counter & Detector Sensor

package zhangphil.sensor;

import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;

public class MainActivity extends AppCompatActivity {
    private String TAG = "ZHANG PHIL";
    private SensorManager mSensorManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        startSensor();
    }

    /**
     * 启动传感器。
     */
    private void startSensor() {
        mSensorManager = (SensorManager) this.getSystemService(Context.SENSOR_SERVICE);

        Sensor mStepCounterSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_STEP_COUNTER);
        Sensor mStepDetectorSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_STEP_DETECTOR);

        if (mSensorManager == null || mStepCounterSensor == null || mStepDetectorSensor == null) {
            throw new UnsupportedOperationException("设备不支持");
        }

        mSensorManager.registerListener(mSensorEventListener, mStepCounterSensor, SensorManager.SENSOR_DELAY_NORMAL);
        mSensorManager.registerListener(mSensorEventListener, mStepDetectorSensor, SensorManager.SENSOR_DELAY_NORMAL);
    }

    private SensorEventListener mSensorEventListener = new SensorEventListener() {
        private float step, stepDetector;

        @Override
        public void onSensorChanged(SensorEvent sensorEvent) {
            /**
             * 计步计数传感器传回的历史累积总步数
             */
            if (sensorEvent.sensor.getType() == Sensor.TYPE_STEP_COUNTER) {
                step = sensorEvent.values[0];
                Log.d(TAG, "STEP_COUNTER:" + step);
            }

            /**
             * 计步检测传感器检测到的步行动作是否有效？
             */
            if (sensorEvent.sensor.getType() == Sensor.TYPE_STEP_DETECTOR) {
                stepDetector = sensorEvent.values[0];
                Log.d(TAG, "STEP_DETECTOR:" + stepDetector);
                if (stepDetector == 1.0) {
                    Log.d(TAG, "一次有效的步行");
                }
            }
        }

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

        }
    };

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mSensorManager.unregisterListener(mSensorEventListener);
    }
}