Thomas Schlagkamp
- Forum-Beiträge: 14
29.03.2013, 15:06:44 via Website
29.03.2013 15:06:44 via Website
Hallo zusammen.
Ich habe folgendes Problem
ich will ich der Klasse 1 eine Variable erstellen mit folgendem Inhalt
.setData(Uri.parse(listItems.get(pos).getLink()));
diese Variable muss in Klasse 2 aufgerufen werden
private static final String source = VARIABLE;
Könnte mir jemand erklären wie ich das anstellen kann?
Im Anschluss noch mal der ganze Code
Über Hilfe würde ich mich sehr freuen
Klasse1
Klasse 2
Ich habe folgendes Problem
ich will ich der Klasse 1 eine Variable erstellen mit folgendem Inhalt
.setData(Uri.parse(listItems.get(pos).getLink()));
diese Variable muss in Klasse 2 aufgerufen werden
private static final String source = VARIABLE;
Könnte mir jemand erklären wie ich das anstellen kann?
Im Anschluss noch mal der ganze Code
Über Hilfe würde ich mich sehr freuen
Klasse1
1public class ListListener implements OnItemClickListener {
2 // List item's reference
3 List<RssItem> listItems;
4 // Calling activity reference
5 Activity activity;
6
7 public ListListener(List<RssItem> aListItems, Activity anActivity) {
8 listItems = aListItems;
9 activity = anActivity;
10 }
11
12 /**
13 * neue Activity aufrufen.
14 */
15 public void onItemClick(AdapterView<?> parent, View view, int pos, long id) {
16
17 Intent i = new Intent(activity, ContenViewActivity.class);
18
19 //Link in Variable packen und zur Verfügung stellen.
20 //Variable in ConteViewActivity als Url aufrufen
21
22 /////////////
23 ???.setData(Uri.parse(listItems.get(pos).getLink()));
24
25 ////////////////////
26
27 activity.startActivity(i);
28
29 }
30
31}
2 // List item's reference
3 List<RssItem> listItems;
4 // Calling activity reference
5 Activity activity;
6
7 public ListListener(List<RssItem> aListItems, Activity anActivity) {
8 listItems = aListItems;
9 activity = anActivity;
10 }
11
12 /**
13 * neue Activity aufrufen.
14 */
15 public void onItemClick(AdapterView<?> parent, View view, int pos, long id) {
16
17 Intent i = new Intent(activity, ContenViewActivity.class);
18
19 //Link in Variable packen und zur Verfügung stellen.
20 //Variable in ConteViewActivity als Url aufrufen
21
22 /////////////
23 ???.setData(Uri.parse(listItems.get(pos).getLink()));
24
25 ////////////////////
26
27 activity.startActivity(i);
28
29 }
30
31}
Klasse 2
1public class ContenViewActivity extends Activity {
2 /**
3 * Die URL des RSS Items.
4 //////////////// */
5
6
7
8
9
10 private static final String source = ???????????????;
11
12 /////////////////////////////////
13 @Override
14 public void onCreate(Bundle savedInstanceState) {
15 super.onCreate(savedInstanceState);
16 setContentView(R.layout.content);
17 }
18
19
20 @Override
21 protected void onStart() {
22 super.onStart();
23
24 // Downloading the RSS feed needs to be done on a separate thread.
25 Thread downloadThread = new Thread(new Runnable() {
26
27 public void run() {
28 try {
29 updateView(getLatestContent(retrieveRssDocument()));
30 } catch (Exception e) {
31 Log.e("Content Retriever", e.getLocalizedMessage(), e);
32 }
33 }
34 });
35
36 downloadThread.start();
37 }
38
39 /**
40 * Updates the {@link WebView} with the provided content.
41 *
42 * @param content
43 * the content to provide to the {@link WebView}.
44 */
45 private void updateView(final String content) {
46 final WebView view = (WebView) findViewById(R.id.content);
47 view.loadData("<html><body>" + content + "</body></html>",
48 "text/html", null);
49 }
50
51 /**
52 * Download the content and parse into a {@link Document}.
53 *
54 * @return a {@link Document} containing the RSS data
55 *
56 * @throws IOException
57 * if an io error was encountered
58 * @throws ParserConfigurationException
59 * an error was encountered while trying to build the document
60 * @throws SAXException
61 * an error was encountered while trying to parse the RSS
62 * content
63 */
64 private Document retrieveRssDocument() throws IOException,
65 ParserConfigurationException, SAXException {
66
67 URL url = new URL(source);
68 URLConnection connection = url.openConnection();
69 InputStream inStream = connection.getInputStream();
70
71 try {
72 DocumentBuilder builder = DocumentBuilderFactory.newInstance()
73 .newDocumentBuilder();
74 return builder.parse(new BufferedInputStream(inStream));
75 } finally {
76 inStream.close();
77 }
78 }
79
80 /**
81 * Obtains the content from the latest RSS entry.
82 *
83 * @return the content from the latest RSS entry
84 *
85 * @throws IOException
86 * if an io error was encountered
87 * @throws ParserConfigurationException
88 * an error was encountered while trying to build the document
89 * @throws SAXException
90 * an error was encountered while trying to parse the RSS
91 * content
92 */
93 private String getLatestContent(Document document) throws IOException,
94 ParserConfigurationException, SAXException {
95
96 NodeList nodeList = document.getElementsByTagName("item");
97 int length = nodeList.getLength();
98 if (length > 0) {
99 return getDescriptionContent(nodeList.item(0));
100 }
101
102 return null;
103 }
104
105 /**
106 * Searches for the first "description" node from the provided root.
107 *
108 * @param root
109 * the root node to start the search from
110 * @return the first "description" node that was found; {@code null} is
111 * returned if no match is found
112 */
113 private String getDescriptionContent(Node root) {
114 if (root instanceof Element) {
115 Element asElement = (Element) root;
116 if (asElement.getTagName().equalsIgnoreCase("description")) {
117 return asElement.getTextContent();
118 }
119 }
120
121 NodeList children = root.getChildNodes();
122 for (int i = 0; i < children.getLength(); i++) {
123 Node node = children.item(i);
124 String result = getDescriptionContent(node);
125 if (result != null) {
126 return result;
127 }
128 }
129 return null;
130 }
131}
2 /**
3 * Die URL des RSS Items.
4 //////////////// */
5
6
7
8
9
10 private static final String source = ???????????????;
11
12 /////////////////////////////////
13 @Override
14 public void onCreate(Bundle savedInstanceState) {
15 super.onCreate(savedInstanceState);
16 setContentView(R.layout.content);
17 }
18
19
20 @Override
21 protected void onStart() {
22 super.onStart();
23
24 // Downloading the RSS feed needs to be done on a separate thread.
25 Thread downloadThread = new Thread(new Runnable() {
26
27 public void run() {
28 try {
29 updateView(getLatestContent(retrieveRssDocument()));
30 } catch (Exception e) {
31 Log.e("Content Retriever", e.getLocalizedMessage(), e);
32 }
33 }
34 });
35
36 downloadThread.start();
37 }
38
39 /**
40 * Updates the {@link WebView} with the provided content.
41 *
42 * @param content
43 * the content to provide to the {@link WebView}.
44 */
45 private void updateView(final String content) {
46 final WebView view = (WebView) findViewById(R.id.content);
47 view.loadData("<html><body>" + content + "</body></html>",
48 "text/html", null);
49 }
50
51 /**
52 * Download the content and parse into a {@link Document}.
53 *
54 * @return a {@link Document} containing the RSS data
55 *
56 * @throws IOException
57 * if an io error was encountered
58 * @throws ParserConfigurationException
59 * an error was encountered while trying to build the document
60 * @throws SAXException
61 * an error was encountered while trying to parse the RSS
62 * content
63 */
64 private Document retrieveRssDocument() throws IOException,
65 ParserConfigurationException, SAXException {
66
67 URL url = new URL(source);
68 URLConnection connection = url.openConnection();
69 InputStream inStream = connection.getInputStream();
70
71 try {
72 DocumentBuilder builder = DocumentBuilderFactory.newInstance()
73 .newDocumentBuilder();
74 return builder.parse(new BufferedInputStream(inStream));
75 } finally {
76 inStream.close();
77 }
78 }
79
80 /**
81 * Obtains the content from the latest RSS entry.
82 *
83 * @return the content from the latest RSS entry
84 *
85 * @throws IOException
86 * if an io error was encountered
87 * @throws ParserConfigurationException
88 * an error was encountered while trying to build the document
89 * @throws SAXException
90 * an error was encountered while trying to parse the RSS
91 * content
92 */
93 private String getLatestContent(Document document) throws IOException,
94 ParserConfigurationException, SAXException {
95
96 NodeList nodeList = document.getElementsByTagName("item");
97 int length = nodeList.getLength();
98 if (length > 0) {
99 return getDescriptionContent(nodeList.item(0));
100 }
101
102 return null;
103 }
104
105 /**
106 * Searches for the first "description" node from the provided root.
107 *
108 * @param root
109 * the root node to start the search from
110 * @return the first "description" node that was found; {@code null} is
111 * returned if no match is found
112 */
113 private String getDescriptionContent(Node root) {
114 if (root instanceof Element) {
115 Element asElement = (Element) root;
116 if (asElement.getTagName().equalsIgnoreCase("description")) {
117 return asElement.getTextContent();
118 }
119 }
120
121 NodeList children = root.getChildNodes();
122 for (int i = 0; i < children.getLength(); i++) {
123 Node node = children.item(i);
124 String result = getDescriptionContent(node);
125 if (result != null) {
126 return result;
127 }
128 }
129 return null;
130 }
131}
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