OkHttp封装（带泛型）

封装工具类

public class HttoUtils2 {
    private NetDataCallBack netDataCallback;
    private Handler mhand=new Handler();
    public <T> void getdata(String url, final NetDataCallBack netDataCallback, final Class<T> tclass) {
        //初始化一个 OkHttpClient 并且设置连接和读取超时时间
        OkHttpClient okhttp = new OkHttpClient.Builder()
                .connectTimeout(10, TimeUnit.SECONDS)
                .readTimeout(20, TimeUnit.SECONDS)
                .build();
        //构造一个Request对象
        Request request = new Request.Builder().url(url).build();
        //通过request的对象去构造得到一个Call对象
        Call call = okhttp.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                netDataCallback.faild(499,e.getMessage());
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String string = response.body().string();

                Gson gson=new Gson();
                T t = gson.fromJson(string, tclass);
                final Message msg = Message.obtain();
                msg.what=ok;
                msg.obj=t;
                mhand.post(new Runnable() {
                    @Override
                    public void run() {
                        netDataCallback.success(msg.obj);
                    }
                });

            }
        });

    }

    //post请求
    public <T>void getLoadDataPost(String url, final NetDataCallBack netDataCallback, final Class<T> tClass, RequestBody body){
        this.netDataCallback = netDataCallback;
        OkHttpClient okHttpClient = new OkHttpClient.Builder()
                .readTimeout(20, TimeUnit.SECONDS)
                .connectTimeout(10, TimeUnit.SECONDS)
                .build();
        final Request request = new Request.Builder().url(url).post(body).build();
        Call call = okHttpClient.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                netDataCallback.faild(499,e.getMessage());
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                T t = new Gson().fromJson(response.body().string(), tClass);
                final Message msg = Message.obtain();
                msg.what = OK;
                msg.obj = t;
                mhand.post(new Runnable() {
                    @Override
                    public void run() {
                        netDataCallback.success(msg.obj);

                    }
                });
            }
        });
    }
}

创建接口

public interface NetDataCallBack<T> {
    void success(T t);
    void faild(int positon, String str);
}

Activity运用

implements NetDataCallBack

public void aaa(){
    HttoUtils2 utils2 = new HttoUtils2();
    utils2.getdata(url,this,Data.class);
}


@Override
public void success(Data data) {
                        
}

@Override
public void faild(int positon, String str) {

}