1

http://docs.blackberry.com/sampledata.json

これは私の Web サービスで、vehicleType、 vehicleColor、fuel、name、experiencePoints、treadType を解析して取得したいと考えています。

public class MainActivity extends Activity {

    private static String url="http://maps.googleapis.com/maps/api/directions/json?origin=Tamil%20ndau,Salem&destination=Tamil%20nadu,%20salem&region=in&sensor=false";
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        JSONObject json=JSONParser.getJSONfromURL(url);  // here i am able to read content of that web service 
    }
} catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        }

値を取得する方法を教えてください。Json オブジェクトと Json 配列のノードを選択できません。値を取得するには、次に何をする必要があるか教えてください。私はJsonの解析とアンドロイドが初めてです。私を助けてください。

4

4 に答える 4

0 
try{
 HttpGet request = new HttpGet(loginUrl);
 HttpResponse response = httpClient.execute(request);
 entityResponse = response.getEntity();
 result = EntityUtils.toString(entityResponse);  


JSONArray array = object.getJSONArray("routes"); 


---Parsing first jsonArray     
  JSONObject routes = array.getJSONObject(0);


---(parsing first jsonarray object)
  String bounds= routes.getString("bounds"); 


-- parsing second josn Array  
  JSONArray legs = routes.getJSONArray("legs"); 


--- (parsing second jsonarray object)   

JSONObject steps = legs.getJSONObject(0); 

String distance= routes.getString("distance"); 


--- parsing third json Array
  JSONArray legs1 = steps.getJSONArray("steps"); 
  for(int i = 0; i < legs1.length(); i++){
  JSONObject steps1 = legs1.getJSONObject(i);


--parsing third jsonarray objecct      
  String htMlVale = steps1.getString("html_instructions").toString(); 


-- parsing inside third jsonarray of jsonarray   
  JSONObject distance             =  steps1.getJSONObject("distance");
          String sDistance                =  distance.getString("text");()



        }
}
于 2012-09-07T05:21:12.150 に答える
0

このクラスを使用できます：

このクラスのオブジェクトを作成してメソッドを呼び出すだけです!!

public class JSONParser {


    private static String result;
    private static String resultArr;

    public static String getJSONArr (String json,String tag1,int arrNum)
    {

        try {
            JSONArray array = new JSONArray(json);
            for (int i = 0; i < array.length(); i++) {
                if(i==arrNum){
                    JSONObject row = array.getJSONObject(i);
                resultArr = row.getString(tag1);
                }
            }

        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return resultArr;

    }

    public static String getJSONObj (String json,String tag1)
    {
        try {
            JSONObject jObj =  new JSONObject(json);

            if(jObj.has(tag1))
                result = jObj.getString(tag1);
            else
                Log.d("JSON ERROR", "tag not found");

        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return result;
    }
}
于 2012-09-07T05:22:06.840 に答える
-1

このコードはあなたにとって役立つかもしれません

public class JSONfunctions {

public static JSONArray getJSONfromURL(String url) {
    InputStream is = null;
    String result = "";
    JSONArray jArray = null;

    // http post
    try {
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(url);
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity entity = response.getEntity();
        is = entity.getContent();

    } catch (Exception e) {
        Log.e("log_tag", "Error in http connection " + e.toString());
    }

    // convert response to string
    try {
        BufferedReader reader = new BufferedReader(new InputStreamReader(
                is, "iso-8859-1"), 8);
        StringBuilder sb = new StringBuilder();
        String line = null;
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
        is.close();
        result = sb.toString();
    } catch (Exception e) {
        Log.e("log_tag get data string ",
                "Error converting result " + e.toString());
    }

    try {

        jArray = new JSONArray(result);
    } catch (JSONException e) {
        Log.e("log_tag create object ",
                "Error parsing data " + e.toString());
    }

    return jArray;
}
  }

これは、これを変更できる解析コードの例です。

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

    JSONArray json = JSONfunctions
            .getJSONfromURL("http://docs.blackberry.com/sampledata.json");

    for (int i = 0; i < json.length(); i++) {

        try {
            Log.e("json names vehicleType", ""
                    + json.getJSONObject(i).getString("vehicleType"));
            Log.e("json names vehicleColor", ""
                    + json.getJSONObject(i).getString("vehicleColor"));
            Log.e("json names fuel",
                    "" + json.getJSONObject(i).getString("fuel"));
            Log.e("json names treadType", ""
                    + json.getJSONObject(i).getString("treadType"));

            Log.e("json names approvedOperators",
                    ""
                            + json.getJSONObject(i).getJSONArray(
                                    "approvedOperators"));

            JSONArray array = json.getJSONObject(i).getJSONArray(
                    "approvedOperators");
            for (int j = 0; j < array.length(); j++) {

                Log.e("json names approvedOperators name ", ""
                        + array.getJSONObject(j).getString("name"));
                Log.e("json names approvedOperators experience ",
                        ""
                                + array.getJSONObject(j).getString(
                                        "experiencePoints"));

            }

        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

}
}
于 2012-09-07T05:20:07.673 に答える
-1

指定された URL は JSONArray を返すため、メソッド getJSONFromUrl は JSONArray を返す必要があります。

try {
        HttpParams params = new BasicHttpParams();
        HttpConnectionParams.setConnectionTimeout(params, Constants.CONNECTION_TIME_OUT);
        HttpConnectionParams.setSoTimeout(params, 0);
        HttpClient httpClient = new DefaultHttpClient(params);

        //prepare the HTTP GET call 
        HttpGet httpget = new HttpGet(urlString);
        //get the response entity
        HttpEntity entity = httpClient.execute(httpget).getEntity();

        if (entity != null) {
            //get the response content as a string
            String response = EntityUtils.toString(entity);
            //consume the entity
            entity.consumeContent();

            // When HttpClient instance is no longer needed, shut down the connection manager to ensure immediate deallocation of all system resources
            httpClient.getConnectionManager().shutdown();

            //return the JSON response
            JSONArray array = new JSONArray(response.trim());
                for(int i = 0 ; i < array.length() ; i++) { //get the current JSON object
                    JSONObject object = (JSONObject) array.get(i);
                    String vehicleType = object.getString("vehicleType");
                    ......
                 }
        }
    }catch (Exception e) {
        e.printStackTrace();
    }
于 2012-09-06T12:05:55.283 に答える