Question

我需要每秒从我的Android手机中收集传感器数据。我编写的代码为我提供了传感器数据，但仅在传感器值发生变化时才显示。但是我需要收集数据，而无论更改如何。我搜索了，很明显，这就是android sensorManager的工作方式。但有人告诉我有一种解决方法，通过使用计时器功能或使用轮询功能（每秒轮询传感器Listener），可以定期收集数据。我不是开发人员，并且对Android编程没有太多的了解。有人可以帮我提供代码吗？下面是我当前的代码：

public class   MainActivity extends AppCompatActivity  implements SensorEventListener{

private static final String TAG = "MainActivity";
private SensorManager sensorManager;
private Sensor mLight, acceleration, mGyro;
TextView soundVal, AccVal, lightVal, GyroVal, RotVal;
Thread runner;
private static double mEMA = 0.0;
static final private double EMA_FILTER = 0.6;
public static final int RequestPermissionCode = 1;
String AudioSavePathInDevice = null;
MediaRecorder mediaRecorder;


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

    soundVal = (TextView) findViewById(R.id.soundVal);
    lightVal = (TextView) findViewById(R.id.lightVal);
    GyroVal = (TextView) findViewById(R.id.GyroVal);
    AccVal = (TextView) findViewById(R.id.AccVal);
    soundVal = (TextView) findViewById(R.id.soundVal);

    Log.d(TAG, "onCreate: Initializing Sensor Services");
    sensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
    mLight = sensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);
 }

 @Override
 public void onResume(){
    super.onResume();
    sensorManager.registerListener(this, mLight,SensorManager.SENSOR_DELAY_GAME);
     if (mLight != null) {
         sensorManager.registerListener(MainActivity.this, mLight, 1000000000);
         Log.d(TAG, "onCreate: Registered Light Listener");
     }else{
         Log.d(TAG, "onCreate: Light Sensor not supported");
     }
 }

 @Override
 public void onPause(){
    super.onPause();
    sensorManager.unregisterListener(this);
 }

//@Override
public void onSensorChanged(SensorEvent sensorEvent) {



    Sensor sensor = sensorEvent.sensor;


    if (sensor.getType() == Sensor.TYPE_LIGHT) {
        Log.d(TAG, "onSensorChanged: \n");
        Log.d(TAG, "onSensorChanged: LIGHT: " + sensorEvent.values[0] + "lx");
        lightVal.setText("Light: " + sensorEvent.values[0] + " lx");

        //SAVING THE LIGHT DATA IN CSV FILE
        String FILENAME = "Light_Data.csv";
        //To get the system time to be saved along with the Light Data for time synchronisation with second Mobile device data
        Calendar calendar = Calendar.getInstance();
        SimpleDateFormat format = new SimpleDateFormat("HH:mm:ss.SSSS");
        String entry = format.format(calendar.getTimeInMillis()) + "," + sensorEvent.values[0] + "," + "lx" + "\n";
        Log.d(TAG, "onSensorChanged: VALUE" +sensorEvent.values[0] + "lx");
        try {
            FileOutputStream out = openFileOutput(FILENAME, Context.MODE_APPEND);
            out.write(entry.getBytes());
            out.close();
        }catch (Exception e){
            e.printStackTrace();
        }
    }
}

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

}
}

无论变化如何，如何定期收集传感器数据

0 个答案: