Okhttp的封装和回调

public class HttpUtil {static HttpUtil util;private final OkHttpClient client;//  私有化构造方法private HttpUtil(){client = new OkHttpClient();}public static HttpUtil getInstance(){if(util == null){synchronized (HttpUtil.class){util = new HttpUtil();}}return util;}


public void httRequest(String url,final HttpRespon respon) {Request request = new Request.Builder().url(url).build();client.newCall(request).enqueue(new Callback() {//              请求失败
            @Overridepublic void onFailure(Call call, IOException e) {e.printStackTrace();respon.onError("请求网络失败");}//              有响应
            @Overridepublic void onResponse(Call call, Response response) throws IOException {if (!response.isSuccessful()) {respon.onError("请求网络失败");}//                  获取响应bodyString json = response.body().string();
//                  解析Json
                    respon.parse(json);
}});}}

定义的回调接口:

public abstract class HttpRespon<T> {//http返回的类型的泛型Class<T> t;public HttpRespon(Class<T> t){this.t = t;}//  请求失败时，回调的方法public abstract void onError(String msg);
//  请求成功时，回调的方法public abstract void onSuccess(T t);public void parse(String json){if(TextUtils.isEmpty(json)){//请求失败onError("连接网络失败");return;}if(t == String.class){onSuccess((T) json);return;}T result = JsonUtil.parse(json, this.t);if(result == null){onError("Json解析失败");}else{onSuccess(result);}}
}

 调用的事例:

            HttpUtil.getInstance().httRequest(Constant.SPLASH_URL, new HttpRespon<Ad>(Ad.class) {@Overridepublic void onError(String msg) {Log.i("fjl", msg);}@Overridepublic void onSuccess(Ad ad) {Intent intent = new Intent();intent.setClass(AdsActivity.this, AdDownloadService.class);intent.putExtra(AdDownloadService.AD_DATA, ad);startService(intent);}});