Vom Lichtsensor Werte erhalten, auch wenn sich die Umgebung nicht ändert?!

1package com.test;
2
3import android.app.Activity;
4import android.hardware.Sensor;
5import android.hardware.SensorEvent;
6import android.hardware.SensorManager;
7import android.hardware.SensorEventListener;
8import android.os.Bundle;
9import android.view.View;
10import android.widget.EditText;
11
12public class Test extends Activity {
13 /** Called when the activity is first created. */
14
15 private SensorManager manager;
16 private SensorEventListener listener;
17 private Sensor sensor;
18
19 @Override
20 public void onCreate(Bundle savedInstanceState) {
21 super.onCreate(savedInstanceState);
22 setContentView(R.layout.main);
23 manager = (SensorManager) getSystemService(SENSOR_SERVICE);
24 final EditText test = (EditText) findViewById (R.id.et1);
25 listener = new SensorEventListener() {
26 @Override
27 public void onAccuracyChanged(Sensor sensor, int accuracy) {
28 }
29
30 @Override
31 public void onSensorChanged(SensorEvent event) {
32 if(event.values.length > 0) {
33 float light = event.values[0];
34 test.setText(Float.toString(light));
35 }
36 }
37
38 };
39
40 sensor = manager.getDefaultSensor(Sensor.TYPE_LIGHT);
41 if(sensor != null) {
42 manager.registerListener(listener, sensor, SensorManager.SENSOR_DELAY_FASTEST);
43 } else {
44 test.setText("Kein Sensor gefunden");
45 }
46 }
47
48 @Override
49 protected void onDestroy() {
50 if(sensor != null) {
51 manager.unregisterListener(listener);
52 }
53 super.onDestroy();
54 }
55}