如何从wunderground API获取数据并将其显示在Android屏幕上？

Question

目前我有一张Android Studio的地图图片，我想知道如何从wunderground中获取信息并将其显示在每个位置的地图顶部。

This是带有一些示例代码的网站。

Answer 1

这将取决于数据的类型。 Concider是一个从JSON Feed中抽取地震数据位置的示例。

try { 
     JSONObject object = (JSONObject) new JSONTokener(JSONResponse) 
       .nextValue(); 
     JSONArray earthquakes = object.getJSONArray("features"); 

     for (int i = 0; i < earthquakes.length(); i++) { 
      JSONObject tmp = (JSONObject) earthquakes.get(i); 
      //Log.i("JSON: ",tmp.toString()); 

      JSONObject geometry = tmp.getJSONObject("geometry"); 
      JSONArray coords = geometry.getJSONArray("coordinates"); 
      JSONObject properties = tmp.getJSONObject("properties"); 

      //Log.i("Data", "Coords:"+coords.getString(0) + " "+ coords.getString(1)+"\n Place:"+properties.getString("place")+ " Mag:"+properties.getString("mag")); 

      if(coords.getString(0) != "" && coords.getString(1) != ""){ 
       result.add(new EarthQuakeRec(
         Float.parseFloat(coords.getString(1)),//Lat 
         Float.parseFloat(coords.getString(0)),//Long 
         Float.parseFloat(properties.getString("mag")),//Magnitude 
         properties.getString("place") 
        ) 
       ); 
      }   
     } 
    } catch (JSONException e) { 
     e.printStackTrace(); 
    } 

而且JSON结构看起来是这样的：

{ 
"id": "nc72241526", 
"type": "Feature", 
"geometry": { 
    "type": "Point", 
    "coordinates": [ 
     -122.0102, 
     37.6053, 
     6 
    ] 
}, 
"properties": { 
    "detail": "http://earthquake.usgs.gov/earthquakes/feed/v1.0/detail/nc72241526.geojson", 
    "type": "earthquake", 
    "net": "nc", 
    "tsunami": null, 
    "sources": ",nc,", 
    "title": "M 3.0 - 1km NE of Union City, California", 
    "time": 1403371328500, 
    "updated": 1403374699020, 
    "mag": 3, 
    "types": ",dyfi,focal-mechanism,general-link,geoserve,nearby-cities,origin,phase-data,scitech-link,tectonic-summary,", 
    "place": "1km NE of Union City, California", 
    "status": "AUTOMATIC", 
    "ids": ",nc72241526,", 
    "alert": null, 
    "rms": 0.17, 
    "code": "72241526", 
    "url": "http://earthquake.usgs.gov/earthquakes/eventpage/nc72241526", 
    "magType": "Md", 
    "mmi": null, 
    "cdi": 3.8, 
    "tz": -420, 
    "felt": 319, 
    "nst": 75, 
    "dmin": 0.03593261, 
    "gap": 25.2, 
    "sig": 260 
} 

}

然后你就开始与JSONObject的类，然后深入到感兴趣的数据点。使用Log类可以帮助您在遍历数据结构时排除故障并衡量您的进度。在我的例子中，它被注释掉了。

对于XML，你可以尝试的东西的这个调：

 try { 

     // Create the Pull Parser 
     XmlPullParserFactory factory = XmlPullParserFactory.newInstance(); 
     XmlPullParser xpp = factory.newPullParser(); 

     // Set the Parser's input to be the XML document in the HTTP Response 
     xpp.setInput(new InputStreamReader(response.getEntity() 
       .getContent())); 

     // Get the first Parser event and start iterating over the XML document 
     int eventType = xpp.getEventType(); 

     while (eventType != XmlPullParser.END_DOCUMENT) { 

      if (eventType == XmlPullParser.START_TAG) { 
       startTag(xpp.getName()); 
      } else if (eventType == XmlPullParser.END_TAG) { 
       endTag(xpp.getName()); 
      } else if (eventType == XmlPullParser.TEXT) { 
       text(xpp.getText()); 
      } 
      eventType = xpp.next(); 
     } 
     return mResults; 
    } catch (XmlPullParserException e) { 
     e.printStackTrace(); 
    } 

这是很多在你扔的，但你并没有给太多的特异性。希望有所帮助。 ;）