Retrofit

最新推荐文章于 2025-04-01 15:49:35 发布

empty_ran

最新推荐文章于 2025-04-01 15:49:35 发布

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本文链接：https://blog.youkuaiyun.com/weixin_43218083/article/details/85541558

本文详细介绍了一种基于Retrofit的网络请求封装方法，通过创建BaseApis接口定义GET、POST和Multipart POST请求，利用RetrofitManager类进行统一管理。文章深入讲解了如何配置OkHttpClient以实现日志拦截、超时重试等功能，并演示了如何生成Map用于POST请求的数据传递，最后提供了get、post及postFormBody方法的具体使用案例。

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BaseApis:

public interface BaseApis<T> {
    @GET
    Observable<ResponseBody> get(@Url String url);

    @POST
    Observable<ResponseBody> post(@Url String url, @QueryMap Map<String, String> map);

    @Multipart
    @POST
    Observable<ResponseBody> postFormBody(@Url String url, @PartMap Map<String, RequestBody> requestBodyMap);
}

RetrofitManager：

public class RetrofitManager<T> {
    private final String BASE_URL = "http://172.17.8.100/small/";

    private static RetrofitManager mRetrofitManager;

    public static synchronized RetrofitManager getInstance() {
        if (mRetrofitManager == null) {
            mRetrofitManager = new RetrofitManager();
        }
        return mRetrofitManager;
    }

    private BaseApis mBaseApis;

    public RetrofitManager() {
        HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
        interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);

        OkHttpClient.Builder builder = new OkHttpClient.Builder();
        builder.connectTimeout(15, TimeUnit.SECONDS);
        builder.readTimeout(15, TimeUnit.SECONDS);
        builder.writeTimeout(15, TimeUnit.SECONDS);
        builder.addInterceptor(interceptor);
        builder.retryOnConnectionFailure(true);
        OkHttpClient client = builder.build();

        Retrofit retrofit = new Retrofit.Builder()
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                .baseUrl(BASE_URL)
                .client(client)
                .build();
        mBaseApis = retrofit.create(BaseApis.class);
    }


    /**
     * 可以这样生成Map<String, RequestBody> requestBodyMap
     * Map<String, String> requestDataMap这里面放置上传数据的键值对。
     */
    public Map<String, RequestBody> generateRequestBody(Map<String, String> requestDataMap) {
        Map<String, RequestBody> requestBodyMap = new HashMap<>();
        for (String key : requestDataMap.keySet()) {
            RequestBody requestBody = RequestBody.create(MediaType.parse("multipart/form-data"),
                    requestDataMap.get(key) == null ? "" : requestDataMap.get(key));
            requestBodyMap.put(key, requestBody);
        }
        return requestBodyMap;
    }

    /**
     * get请求
     */
    public RetrofitManager get(String url) {

        mBaseApis.get(url)
                //后台执行在哪个线程中
                .subscribeOn(Schedulers.io())
                //最终完成后执行在哪个线程
                .observeOn(AndroidSchedulers.mainThread())
                //设置我们的rxJava
                .subscribe(observer);

        return mRetrofitManager;
    }

    /**
     * 表单post请求
     */
    public RetrofitManager postFormBody(String url, Map<String, RequestBody> map) {
        if (map == null) {
            map = new HashMap<>();
        }

        mBaseApis.postFormBody(url, map)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(observer);
        return mRetrofitManager;
    }


    /**
     * 普通post请求
     */
    public RetrofitManager post(String url, Map<String, String> map) {
        if (map == null) {
            map = new HashMap<>();
        }
        mBaseApis.post(url, map)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(observer);
        return mRetrofitManager;
    }

    private Observer observer = new Observer<ResponseBody>() {
        @Override
        public void onNext(ResponseBody responseBody) {
            try {
                String data = responseBody.string();
                if (listener != null) {
                    listener.onSuccess(data);
                }
            } catch (IOException e) {
                e.printStackTrace();
                if (listener != null) {
                    listener.onFail(e.getMessage());
                }
            }
        }

        @Override
        public void onError(Throwable e) {
            if (listener != null) {
                listener.onFail(e.getMessage());
            }
        }

        @Override
        public void onCompleted() {

        }
    };

    private HttpListener listener;

    public void result(HttpListener listener) {
        this.listener = listener;
    }

    public interface HttpListener {
        void onSuccess(String data);

        void onFail(String error);
    }
}