Android Open Source - FragmentTutorial Gson Request

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License

The source code is released under:

Apache License

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Java Source Code

package com.yanlu.android.fragment.net;
//from   w  w  w  . j  a  v a  2 s. c o  m
import android.util.Log;

import com.android.volley.AuthFailureError;
import com.android.volley.NetworkResponse;
import com.android.volley.ParseError;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.Response.ErrorListener;
import com.android.volley.Response.Listener;
import com.android.volley.toolbox.HttpHeaderParser;
import com.google.gson.Gson;
import com.google.gson.JsonSyntaxException;

import java.io.UnsupportedEncodingException;
import java.util.Map;

/**
 * Volley adapter for JSON requests that will be parsed into Java objects by Gson.
 */
public class GsonRequest<T> extends Request<T> {
    private final Gson gson = new Gson();
    private final Class<T> clazz;
    private final Map<String, String> headers;
    private final Listener<T> listener;

    /**
     * Make a GET request and return a parsed object from JSON.
     *
     * @param url URL of the request to make
     * @param clazz Relevant class object, for Gson's reflection
     * @param headers Map of request headers
     */
    public GsonRequest(String url, Class<T> clazz, Map<String, String> headers,
            Listener<T> listener, ErrorListener errorListener) {
        super(Method.GET, url, errorListener);
        this.clazz = clazz;
        this.headers = headers;
        this.listener = listener;
    }

    @Override
    public Map<String, String> getHeaders() throws AuthFailureError {
        return headers != null ? headers : super.getHeaders();
    }

    @Override
    protected void deliverResponse(T response) {
        listener.onResponse(response);
    }
    @Override
     protected Response<T> parseNetworkResponse(NetworkResponse response) {
       try {
         String json = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
            Log.d("url", getUrl());
            Log.d("http response", json);
            return Response.success(gson.fromJson(json, clazz),
             HttpHeaderParser.parseCacheHeaders(response));
       } catch (UnsupportedEncodingException e) {
         return Response.error(new ParseError(e));
       } catch (JsonSyntaxException e) {
         return Response.error(new ParseError(e));
       }
     }
}

Java Source Code List