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 ???????????@Override ???????????public void onFailure(Call call, IOException e) { ???????????????e.printStackTrace(); ???????????????respon.onError("请求网络失败"); ???????????} ???????????// ?????????????有响应 ???????????@Override ???????????public void onResponse(Call call, Response response) throws IOException { ???????????????if (!response.isSuccessful()) { ???????????????????respon.onError("请求网络失败"); ???????????????}// ?????????????????获取响应body ???????????????????String json = response.body().string();// ?????????????????解析Json ???????????????????respon.parse(json); ???????????} ???????}); ???}}

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); ???????} ???}}

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