Gravity sensor value increases
<p>Gravity sensor values increases after each call of <code>onSensorChanged(SensorEvent event)</code> the values of event. Values increases and after a little bit of time (about 1 min) reaches a NaN value. Could someone say why this is happening?
Code:</p>

<pre><code>private void recordData(SensorEvent e) {
    String label;
    int currentSensorId = -1;
    switch (e.sensor.getType()) {
    case Sensor.TYPE_ACCELEROMETER:
        currentSensorId = 0;
        label = LOG_LABEL_ACCELEROMETER;
        break;
    case Sensor.TYPE_GYROSCOPE:
        label = LOG_LABEL_GYROSCOPER;
        currentSensorId = 1;
        break;
    case Sensor.TYPE_GRAVITY:
        label = LOG_LABEL_GRAVITY;
        currentSensorId = 2;
        break;
    case Sensor.TYPE_ROTATION_VECTOR:
        label = LOG_LABEL_ROTATION_VECTOR;
        currentSensorId = 3;
        break;
    default:
        label = "UNKNOWN SENSOR TYPE!";
        break;
    }
    if (currentSensorId == -1)
        return;

    // Force set events frequency to value from config,
    // cause sensor events minimal frequency = 0.2 sec.
    timePassed[currentSensorId] = System.currentTimeMillis()
            - lastSensorEventTime[currentSensorId];
    if (timePassed[currentSensorId] &lt; Config.SENSOR_DELAY_MILLISEC) {
        return;
    } else {
        lastSensorEventTime[currentSensorId] = System.currentTimeMillis();
    }

    if (this.pauseRecordingData || checkSDCardMemory())
        return;
    fileWriter.writeEvent(label, System.currentTimeMillis(), e.values);
}

public void writeEvent(String eventSource, long timestamp, float[] values) {
        Log.d(TAG, "writeEvent(); eventSource = " + eventSource);       


    if ( !this.fileExists ) createNewFile();        
    try {       
        String valuesString = eventSource + "\t" + String.format( "%d\t", timestamp);

        for (int i = 0; i &lt; values.length; i++) {
            valuesString += String.format( "%f\t",values[i]);
            Log.d(TAG, "writeEvent(); values[" + i + "] = " + values[i]);
    }           
        buffWriter.append(valuesString + "\n");
    } catch (IOException e1) {              
          e1.printStackTrace();
          Log.d(TAG,"RECORDING EVENT TO FILE FAILED!");
    }               
}
</code></pre>
