Android中怎样使用计步器传感器 "TYPE_STEP_DETECTOR"

在Android 4.4以后的版本已经可以直接支持计步器sensor，参考下面的文章。

http://developer.android.com/about/versions/android-4.4.html#UserInput

http://motzcod.es/post/82515321689/part-1-my-stepcounter-android-step-sensors

http://baroqueworksdev.blogspot.com/2013/12/how-to-use-sensor-of-typestepdetector.html

Initialize Sensor

We have to get a Sensor's Object from SensorManager.
Set the type "Sensor.TYPE_STEP_DETECTOR".

public class StepCounterActivity extends Activity {
    private SensorManager mSensorManager;
    private Sensor mStepSensor;
    private TextView mTextView;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        mTextView = (TextView) findViewById(R.id.text_step);
 
        mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
        mStepSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_STEP_DETECTOR);
 
    }
 
    protected void onResume() {
        super.onResume();
        mSensorManager.registerListener(mSensorEventListener, mStepSensor,
                SensorManager.SENSOR_DELAY_NORMAL);
    }
 
    protected void onPause() {
        super.onPause();
        mSensorManager.unregisterListener(mSensorEventListener);
    }

Create a SensorListener

We can get a trigger from onSensorChanged.

private SensorEventListener mSensorEventListener = new SensorEventListener() {
    private int mStep;
 
    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {
 
    }
 
    @Override
    public void onSensorChanged(SensorEvent event) {
        if (event.values[0] == 1.0f) {
            mStep++;
        }
        mTextView.setText(Integer.toString(mStep));
    }
};