GsonRequest.java

package com.iwhys.cnode.util.volley;

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.FieldNamingPolicy;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonSyntaxException;
import com.iwhys.cnode.util.LogUtil;

import java.io.UnsupportedEncodingException;
import java.util.Date;

/**
 * 网络请求获取实体类
 * Created by devil on 15/4/2.
 */
public class GsonRequest<T> extends Request<T> {

    private final Listener<T> listener;

    private final Gson gson;

    private Class<T> clazz;

    public GsonRequest(int method, String url, Class<T> clazz, Listener<T> listener,
                       ErrorListener errorListener) {
        super(method, url, errorListener);
        gson = new GsonBuilder()
                .setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
                .registerTypeAdapter(Date.class, new DateTypeAdapter())
                .create();
        this.clazz = clazz;
        this.listener = listener;
    }

    public GsonRequest(String url, Class<T> clazz, Listener<T> listener,
                       ErrorListener errorListener) {
        this(Method.GET, url, clazz, listener, errorListener);
    }

    @Override
    protected Response<T> parseNetworkResponse(NetworkResponse response) {
        try {
            String jsonString = new String(response.data,
                    HttpHeaderParser.parseCharset(response.headers));
            LogUtil.sysout(jsonString);
            return Response.success(gson.fromJson(jsonString, clazz),
                    HttpHeaderParser.parseCacheHeaders(response));
        } catch (UnsupportedEncodingException e) {
            return Response.error(new ParseError(e));
        } catch (JsonSyntaxException e) {
            return Response.error(new ParseError(e));
        }
    }

    @Override
    protected void deliverResponse(T response) {
        listener.onResponse(response);
    }
}