[Solved] RestAPI JSON Parsing

Question

Here is solution, For this you have to use Volley Library to get data from Server.

Add this line in build.gradle(Module:app)

dependencies {....
 compile 'com.mcxiaoke.volley:library:1.0.19'
 }

Use this code in Main Activity

public void getJsonData() {

    String tag = "get_json";

    StringRequest request = new StringRequest(Request.Method.POST,
            "YOUR URL TO GET JSON DATA", new Response.Listener<String>() {

        @Override
        public void onResponse(String response) {
            Log.d(TAG, "Get response : " + response);
            try {
                JSONObject object = new JSONObject(response);
                String name = object.getString("name");
                String description = object.getString("description");
                String url = object.getString("url");
                JSONArray array = object.getJSONArray("interfaces");
                for (int i = 0;i<array.length();i++){
                    JSONObject jsonObject = array.getJSONObject(i);
                    String name_2 = jsonObject.getString("name");
                    JSONArray methodArray = jsonObject.getJSONArray("methods");
                    for (int k=0;k<methodArray.length();k++){
                        JSONObject object_1 = methodArray.getJSONObject(k);
                        String name_3= object_1.getString("name");
                        String returnvalue = object_1.getString("returnvalue");
                        JSONArray parametersArray = object_1.getJSONArray("parameters");
                        for (int j=0;j<parametersArray.length();j++){
                            JSONObject jsonObject_1 = parametersArray.getJSONObject(j);
                            String name_4 = jsonObject_1.getString("name");
                            String type = jsonObject_1.getString("type");
                        }
                    }
                }
         Customelistadapter adapter = new Customelistadapter(MainActivity.this,data1,data3,data2);
        lv.setAdapter(adapter);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }, new Response.ErrorListener() {

        @Override
        public void onErrorResponse(VolleyError error) {
            error.printStackTrace();

        }
    });
    request.setRetryPolicy(new RetryPolicy() {

        @Override
        public void retry(VolleyError error) throws VolleyError {
        }

        @Override
        public int getCurrentTimeout() {
            return 0;
        }

        @Override
        public int getCurrentRetryCount() {
            return 0;
        }
    });
    request.setShouldCache(false);
    AppController.getInstance().addToRequestQueue(request, tag);
}

To run this method you have to add this line in onCreat of MainActivity

getJsonData();

Create Application Class

public class AppController extends Application {
   public static final String TAG = AppController.class.getSimpleName();

private RequestQueue mRequestQueue;
private static AppController mInstance;

@Override
   public void onCreate() {
    super.onCreate();
    mInstance = this;
}

public static synchronized AppController getInstance() {
    return mInstance;
}

public RequestQueue getRequestQueue() {
    if (mRequestQueue == null) {
        mRequestQueue = Volley.newRequestQueue(getApplicationContext());
    }

    return mRequestQueue;
}

public <T> void addToRequestQueue(Request<T> req, String tag) {
    req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
    getRequestQueue().add(req);
     }
  }

Now Edit in mainfest.xml inside Application tag add this

 <application
    android:name=".AppController">

Happy to help…

Accepted Answer