如何玩我的Android加速度计数据

Question

幸运的是，我写了一个Android应用程序来获取加速器数据。当我快速移动设备时，我得到一个挥动的图形，如下所示，所以我肯定可以检测到我摇动设备的速度有多快。如何使用数据来检测晃动的速度？也许我应该在每毫秒内得到delta？

package course.examples.Sensors.ShowValues;

import android.app.Activity;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.widget.TextView;

public class SensorRawAccelerometerActivity extends Activity implements
        SensorEventListener {

    private static final int UPDATE_THRESHOLD = 500;
    private SensorManager mSensorManager;
    private Sensor mAccelerometer;

    private TextView mXValueView, mYValueView, mZValueView;
    private long mLastUpdate;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        mXValueView = (TextView) findViewById(R.id.x_value_view);
        mYValueView = (TextView) findViewById(R.id.y_value_view);
        mZValueView = (TextView) findViewById(R.id.z_value_view);

        // Get reference to SensorManager
        mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);

        // Get reference to Accelerometer
        if (null == (mAccelerometer = mSensorManager
                .getDefaultSensor(Sensor.TYPE_ACCELEROMETER)))
            finish();

    }

    // Register listener
    @Override
    protected void onResume() {
        super.onResume();

        mSensorManager.registerListener(this, mAccelerometer,
                SensorManager.SENSOR_DELAY_UI);

        mLastUpdate = System.currentTimeMillis();

    }

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

    // Process new reading
    @Override
    public void onSensorChanged(SensorEvent event) {

        if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {

            long actualTime = System.currentTimeMillis();

            if (actualTime - mLastUpdate > UPDATE_THRESHOLD) {

                mLastUpdate = actualTime;

                float x = event.values[0], y = event.values[1], z = event.values[2];

                mXValueView.setText(String.valueOf(x));
                mYValueView.setText(String.valueOf(y));
                mZValueView.setText(String.valueOf(z));

            }
        }
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {
        // N/A
    }
}