ListView aktualisieren über 2. Activity

1public void getData() {
2 pd = ProgressDialog.show(this, "Laden...", "Hole Daten...", true, true);
3
4 Thread thread = new Thread(this);
5 thread.start();
6 }
7
8 public void run() {
9 String result = "";
10 ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
11
12 try {
13 HttpClient httpclient = new DefaultHttpClient();
14 HttpPost httppost = new HttpPost(
15 "urlzuphp");
16 httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
17 HttpResponse response = httpclient.execute(httppost);
18 HttpEntity entity = response.getEntity();
19 is = entity.getContent();
20 } catch (Exception e) {
21 Log.e("log_tag", "Fehler in http-Connection " + e.toString(), e);
22 }
23
24 try {
25 BufferedReader reader = new BufferedReader(new InputStreamReader(
26 is, "iso-8859-1"), 8);
27 StringBuilder sb = new StringBuilder();
28 String line = null;
29 while ((line = reader.readLine()) != null) {
30 sb.append(line + "n");
31 }
32 is.close();
33 result = sb.toString();
34 } catch (Exception e) {
35 Log.e("log_tag", "Fehler bei Result-Konvertierung " + e.toString(),
36 e);
37 }
38
39 try {
40 JSONArray jArray = new JSONArray(result);
41 for (int i = 0; i < jArray.length(); i++) {
42 json_data = jArray.getJSONObject(i);
43 results.add((String) json_data.get("title") + " "
44 + json_data.get("message"));
45 }
46 } catch (JSONException e) {
47 Log.e("log_tag", "Fehler beim Daten holen " + e.toString(), e);
48 }
49 handler.sendEmptyMessage(0);
50 }
51
52 private Handler handler = new Handler() {
53 @Override
54 public void handleMessage(Message msg) {
55 pd.dismiss();
56 filllist();
57 }
58 };
59
60 protected void filllist() {
61 try {
62 ListView lv = (ListView) findViewById(R.id.lv);
63 lv.setBackgroundColor(Color.LTGRAY);
64 lv.setCacheColorHint(Color.LTGRAY);
65 lv.setAdapter(new ArrayAdapter<String>(this,
66 android.R.layout.simple_list_item_1, results));
67 } catch (Exception e) {
68 Log.e("log_tag", "Fehler bei Erstellung der Filelist "
69 + e.toString(), e);
70 }
71 }
72}

1public class MenuActivityMain extends Activity {
2
3 // Menu Optionen
4 private static final int MENU_AKTUALISIEREN = 0;
5 private static final int MENU_EINTRAG = 1;
6 private static final int MENU_BEENDEN = 2;
7 private static final int MENU_PREF = 3;
8
9 // Beschriftungen der Menuoptionen
10 private static final String MENU_OPTION_AKTUALISIEREN = "Aktualisieren";
11 private static final String MENU_OPTION_EINTRAG = "Neuer Eintrag";
12 private static final String MENU_OPTION_BEENDEN = "Beenden";
13 private static final String MENU_OPTION_PREF = "Einstellungen";
14
15 /* Menu Items werden erstellt */
16 public boolean onCreateOptionsMenu(Menu menu) {
17 menu.add(0, MENU_AKTUALISIEREN, 0, MENU_OPTION_AKTUALISIEREN).setIcon(
18 R.drawable.ic_menu_refresh);
19 menu.add(0, MENU_EINTRAG, 0, MENU_OPTION_EINTRAG).setIcon(
20 android.R.drawable.ic_menu_add);
21 menu.add(0, MENU_PREF, 0, MENU_OPTION_PREF).setIcon(
22 android.R.drawable.ic_menu_preferences);
23 menu.add(0, MENU_BEENDEN, 0, MENU_OPTION_BEENDEN).setIcon(
24 android.R.drawable.ic_menu_close_clear_cancel);
25 return true;
26 }
27
28 public boolean onOptionsItemSelected(MenuItem item) {
29 switch (item.getItemId()) {
30 case MENU_AKTUALISIEREN:
31 Toast.makeText(getApplicationContext(),
32 "Feature noch nicht implementiert", Toast.LENGTH_LONG)
33 .show();
34 HIER SOLL DIE LISTVIEW AKTUALISIERT WERDEN
35 break;
36 case MENU_EINTRAG:
37 startActivity(new Intent(this, Eintrag.class));
38 break;
39 case MENU_BEENDEN:
40 AlertDialog.Builder builder = new AlertDialog.Builder(this);
41 builder.setMessage("Möchtest du App Wunsch Beenden?").setTitle(
42 "Beenden").setCancelable(false).setPositiveButton("Ja",
43 new DialogInterface.OnClickListener() {
44 public void onClick(DialogInterface dialog, int id) {
45 finish();
46 }
47 }).setNegativeButton("Nein",
48 new DialogInterface.OnClickListener() {
49 public void onClick(DialogInterface dialog, int id) {
50 dialog.dismiss();
51 }
52 });
53 AlertDialog alert = builder.create();
54 alert.show();
55 break;
56 case MENU_PREF:
57 Intent settingsActivity = new Intent(getBaseContext(),
58 Einstellungen.class);
59 startActivity(settingsActivity);
60 break;
61 }
62 return false;
63 }
64}