從互聯網上獲取文本

Question

如果你去http://www.elven.ee/ip/ - 你可以看到它給出了IP。如果刷新，它會給出不同的端口。

我怎樣才能把這個IP到android中？我不知道如何讓它每隔5秒更新一次，但現在我想知道如何將它放入我的手機中。我想把它顯示爲TextView :)。

Answer 1

@mopsled解決方案並沒有爲我工作，所以這裏是我的：

public class TestActivity extends Activity { 

/** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    TextView tv = (TextView) findViewById(R.id.textView1); 
    String ip = ""; 
    final DefaultHttpClient httpClient = new DefaultHttpClient(); 
    final HttpGet httpGet = new HttpGet("http://www.elven.ee/ip/"); 
    try { 
     final HttpResponse response = httpClient.execute(httpGet); 
     if (response.getStatusLine().getStatusCode() == 200) { 
      ip = getString(response); 
     } 
    } catch (final ClientProtocolException e) { 
     e.printStackTrace(); 
    } catch (final IOException e) { 
     e.printStackTrace(); 
    } 
    tv.setText(ip); 
} 

private static String getString(HttpResponse response) { 
    final HttpEntity retEntity = response.getEntity(); 
    if (retEntity != null) { 
     InputStream instream = null; 
     try { 
      instream = retEntity.getContent(); 
     } catch (final IllegalStateException ise) { 
      ise.printStackTrace(); 
     } catch (final IOException ioe) { 
      ioe.printStackTrace(); 
     } 
     final String result = convertStreamToString(instream); 
     return result; 
    } else { 
     return ""; 
    } 
} 

private static String convertStreamToString(final InputStream is) { 
    final BufferedReader reader = new BufferedReader(new InputStreamReader(is)); 
    final StringBuilder sb = new StringBuilder(); 

    String line = null; 
    try { 
     while ((line = reader.readLine()) != null) { 
      sb.append(line + "\n"); 
     } 
    } catch (final IOException ioe) { 
     ioe.printStackTrace(); 
    } finally { 
     try { 
      is.close(); 
     } catch (final IOException ioe) { 
      ioe.printStackTrace(); 
     } 
    } 
    return sb.toString().trim(); 
} 
} 

Answer 2

編輯：固定碼

嘗試HTTPURLConnection（一個例子found here的簡化版本）：

StringBuilder content = new StringBuilder(); 

try { 
    URL url = new URL("http://www.elven.ee/ip/"); 
    URLConnection urlConnection = url.openConnection(); 
    BufferedReader bufferedReader = 
     new BufferedReader(new InputStreamReader(urlConnection.getInputStream())); 

    String line; 
    while ((line = bufferedReader.readLine()) != null) { 
     content.append(line + "\n"); 
    } 

    bufferedReader.close(); 
} catch(Exception e) { 
    e.printStackTrace(); 
} 

String myIp = content.toString();