Background Servic zum Bilder laden

1public class ImageService extends Service {
2
3 private final String TAG = "";
4 private final String URL = "http://www.mind-the-app.de/wp-content/uploads/2010/02/android.gif";
5 private final Handler handler = new Handler();
6 private final Timer timer = new Timer();
7
8 @Override
9 public IBinder onBind(Intent arg0) {
10
11 return null;
12 }
13
14 @Override
15 public void onCreate() {
16 super.onCreate();
17 Toast.makeText(this, "Service created...", Toast.LENGTH_LONG).show();
18 Log.i("Service", "onCreate");
19 }
20
21 @Override
22 public void onDestroy() {
23 super.onDestroy();
24 Toast.makeText(this, "Service destroyed...", Toast.LENGTH_LONG).show();
25 Log.i("Service", "onDestroy");
26 timer.cancel();
27 }
28
29 @Override
30 public void onStart(Intent intent, int startid) {
31 Toast.makeText(this, "My Service Started", Toast.LENGTH_LONG).show();
32
33
34 Log.i("Service", "onStart");
35
36 timer.scheduleAtFixedRate(update, 0, 500);
37// task being the method to be executed
38// after the time to initial execution
39// (interval the time for repeating the execution)
40 }
41
42 final TimerTask update = new TimerTask() {
43
44 @Override
45 public void run() {
46
47 currentImage();
48 }
49 };
50
51 public Drawable currentImage(){
52//Image updaten
53//...
54//...
55 return loadImageFromWeb(URL);
56 }
57
58 private Drawable loadImageFromWeb(String url) {
59 Log.i("", "Loading Image.");
60 try {
61 InputStream is = (InputStream) new URL(url).getContent();
62 Drawable d = Drawable.createFromStream(is, "src name");
63 return d;
64 } catch (Exception e) {
65 System.out.println("Exc=" + e);
66 return null;
67 }
68 }
69
70 @Override
71 public void onLowMemory() {
72 super.onLowMemory();
73 onDestroy();
74 }

1btn_start.setOnClickListener(new OnClickListener() {
2
3 @Override
4 public void onClick(View v) {
5 startService(new Intent(LiveView.this, ImageService.class));
6 }
7 });
8
9 btn_stop.setOnClickListener(new OnClickListener() {
10
11 @Override
12 public void onClick(View v) {
13 stopService(new Intent(LiveView.this, ImageService.class));
14 }
15 });