返回字符串從網頁 - Android的失敗

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我嘗試使用下面的代碼以檢索從一個網站的字符串：返回字符串從網頁 - Android的失敗

// webgrabber starts here 
public String getPage() { 
    // lets format the icaos the user is interested in 
    icaos = etICAO1.getText().toString() + " " 
      + etICAO2.getText().toString() + " " 
      + etICAO3.getText().toString() + " " 
      + etICAO4.getText().toString() + " " 
      + etICAO5.getText().toString() + " " 
      + etICAO6.getText().toString() + " " 
      + etICAO7.getText().toString() + " " 
      + etICAO8.getText().toString() + " "; 

    //now lets format the webaddress 
    finalWebAddress = websitePart1 + icaos + websitePart2; 
    //try to get the data 
    Toast.makeText(getApplicationContext(), 
        "Collecting data from " + finalWebAddress, Toast.LENGTH_LONG).show(); 
    try { 
     HttpURLConnection con = (HttpURLConnection) new URL(finalWebAddress) 
       .openConnection(); 
     con.connect(); 

     if (con.getResponseCode() == HttpURLConnection.HTTP_OK) { 
      return inputStreamToString(con.getInputStream()); 
     } else { 
      Toast.makeText(getApplicationContext(), 
         "No Internet connection detected. Please fix your connection and try again.", Toast.LENGTH_LONG).show(); 
      return null; 
     } 
    } catch (IOException ex) { 
     return null; 
    } 
} 

private String inputStreamToString(InputStream in) throws IOException { 
    BufferedReader bufferedReader = new BufferedReader(
      new InputStreamReader(in)); 
    StringBuilder stringBuilder = new StringBuilder(); 
    String line = null; 

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

    bufferedReader.close(); 
    //set the TV to the weather we returned 
    return stringBuilder.toString(); 
}

的GETPAGE（）從一個onclick調用此代碼：

if (v == ibGrabber) {   
    getPage(); 
    tvWeather.setText(getPage()); 
}

當我點擊按鈕，我得到的來自logcat的以下內容：

11-22 08:18:51.780: E/AndroidRuntime(11637): FATAL EXCEPTION: main 
11-22 08:18:51.780: E/AndroidRuntime(11637): android.os.NetworkOnMainThreadException 
11-22 08:18:51.780: E/AndroidRuntime(11637): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1118) 
11-22 08:18:51.780: E/AndroidRuntime(11637): at java.net.InetAddress.lookupHostByName(InetAddress.java:385) 
11-22 08:18:51.780: E/AndroidRuntime(11637): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236) 
11-22 08:18:51.780: E/AndroidRuntime(11637): at java.net.InetAddress.getAllByName(InetAddress.java:214) 
11-22 08:18:51.780: E/AndroidRuntime(11637): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70) 
11-22 08:18:51.780: E/AndroidRuntime(11637): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50) 
11-22 08:18:51.780: E/AndroidRuntime(11637): at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:340) 
11-22 08:18:51.780: E/AndroidRuntime(11637): at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87) 
11-22 08:18:51.780: E/AndroidRuntime(11637): at libcore.net.http.HttpConnection.connect(HttpConnection.java:128) 
11-22 08:18:51.780: E/AndroidRuntime(11637): at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315) 
11-22 08:18:51.780: E/AndroidRuntime(11637): at libcore.net.http.HttpEngine.connect(HttpEngine.java:310) 
11-22 08:18:51.780: E/AndroidRuntime(11637): at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289) 
11-22 08:18:51.780: E/AndroidRuntime(11637): at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239) 
11-22 08:18:51.780: E/AndroidRuntime(11637): at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80)

有人可以幫我找回這個海峽並在我的文本視圖中設置值？

感謝;

安迪

來源

2013-11-22 andy