Android XML解析AsyncTask

我在解析來自URL的XML時遇到了問題。我創建一個天氣應用程序，我想從http://api.openweathermap.org/解析XML。我用這個AsyncTask，它不工作。這是我的代碼，謝謝你的回覆。只有ProgressDialog正在顯示，不再顯示。我也有清單中的互聯網許可。Android XML解析AsyncTask

Weather.java

public class Weather extends AsyncTask<String[],Void,String[]> { 

private MainActivity activity; 
private XmlPullParserFactory factoryObj; 
private String url; 
private ProgressDialog pDialog; 


public Weather(MainActivity activity, String url) { 
    this.activity = activity; 
    this.url = url; 
} 

@Override 
protected void onPreExecute() { 
    super.onPreExecute(); 
    pDialog = new ProgressDialog(activity); 
    pDialog.setMessage("Loading..."); 
    pDialog.setTitle("Please wait"); 
    pDialog.show(); 
} 

@Override 
protected String[] doInBackground(String[]... params) { 

    try{ 

     URL myurl = new URL(url); 
     HttpURLConnection connection = (HttpURLConnection) myurl.openConnection(); 
     connection.setReadTimeout(10000 /* milliseconds */); 
     connection.setConnectTimeout(15000 /* milliseconds */); 
     connection.setRequestMethod("GET"); 
     connection.setDoInput(true); 
     connection.connect(); 
     InputStream stream = connection.getInputStream(); 


     factoryObj = XmlPullParserFactory.newInstance(); 
     XmlPullParser parser = factoryObj.newPullParser(); 

     parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES,false); 
     parser.setInput(stream,null); 
     String[] result = parseXML(parser); 
     stream.close(); 
     return result; 
    }catch(Exception e) 
    { 
     e.printStackTrace(); 
     return null; 
    } 
} 

public String[] parseXML(XmlPullParser parser) throws IOException,XmlPullParserException{ 


    int event; 
    String text=null; 
    String[] result =new String[1]; 


    event = parser.getEventType(); 

    while(event != XmlPullParser.END_DOCUMENT){ 
     String name = parser.getName(); 

     switch(event){ 

      case XmlPullParser.START_TAG: 
       break; 
      case XmlPullParser.TEXT: 
       break; 
      case XmlPullParser.END_TAG: 
       if(name.equals("temperature")) 
        result[0] = parser.getAttributeValue(null,"value"); 
       break; 

     } 
     parser.next(); 


    } 

    return result; 
} 


@Override 
protected void onPostExecute(String[] result) { 
    super.onPostExecute(result); 
    pDialog.dismiss(); 
    activity.callBackData(result); 
} 
}

和MainActivity.java：

public class MainActivity extends Activity { 


TextView temp; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    temp = (TextView) findViewById(R.id.temptextView); 


    String url ="http://api.openweathermap.org/data/2.5/weather?q=warsaw&mode=xml&appid=35fae97674d2f8032b66a35addf05450"; 
    new Weather(this,url).execute(); 

} 


public void callBackData(String[] result) { 
    temp.setText(result[0]); 

} 
}

來源

2016-08-15 Mateusz

這是拋出異常嗎？ – Lino

不，應用從不停止。 – Mateusz

請從END_TAG移動代碼START_TAG

case XmlPullParser.START_TAG: 
    if(name.equals("temperature")) 
     result[0] = parser.getAttributeValue(null,"value"); 
    break;

這是因爲「溫度」不有明確的結束標記

來源

2016-08-15 07:52:17 Lino

這是一個XML文件，我想付民標籤是顯式這裏是從XML的代碼塊： <溫度值=「292.08」分鐘=「289.82」最大值=「295.93」單元=「開爾文」 /> <溼度值=「64」單位=「％」/> <壓力值=「3」單位=「hPa」/> – Mateusz

明確表示它沒有。無論如何，我的建議是否有效？ – Lino

PL if（name.equals（「country」）） result [0] = parser.getText（）; 沒有工作:( – Mateusz

@Lino你是對的！我將END_TAG更改爲START_TAG，一切正常！謝謝

來源

2016-08-16 08:21:48 Mateusz

Android XML解析AsyncTask

回答

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