Retrofit-入门使用

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dependencies {    compile "com.squareup.retrofit2:retrofit:2.1.0"    compile "com.squareup.retrofit2:converter-gson:2.1.0"}

2.请求服务接口类-注解对应服务器接口

public interface HttpService {    String SERVER_HOST = "http://xx.xx.xx.xx";    String CONTENT_PATH = "/xx";    class factory {        private static volatile HttpService instance;        public static HttpService getHttpService() {            if (instance == null) {                synchronized (HttpService.class) {                    if (instance == null) {                        Retrofit rf = new Retrofit.Builder().baseUrl(HttpService.SERVER_HOST).build();                        HttpService hs = rf.create(HttpService.class);                        instance = hs;                    }                }            }            return instance;        }    }    @GET(CONTENT_PATH + "/api/app/list?type=sense")    Call<ResponseBody> list(@Header("DAAUTH") String token);    @GET(CONTENT_PATH + "/api/app/navlist?type=sense")    Call<ResponseBody> favlist(@Header("DAAUTH") String token);    @GET(CONTENT_PATH + "/api/app/fav?type=sense")    Call<ResponseBody> fav(@Header("DAAUTH") String token, @Query("appid") String appid);    @GET(CONTENT_PATH + "/api/app/unfav?type=sense")    Call<ResponseBody> unfav(@Header("DAAUTH") String token, @Query("appid") String appid);    @GET(CONTENT_PATH + "/api/auth/login/")    Call<ResponseBody> loginByBasic(@Header("DAAUTH") String basic);    @GET(CONTENT_PATH + "/api/auth/login/")    Call<ResponseBody> loginByToken(@Header("DAAUTH") String token);}

这里采用了一个单例模式，在定义的接口服务类中声明一个内部类factory来定义与返回HttpService的单例，内部直接使用了Retrofit进行创建。

3.具体调用

HttpService hs = HttpService.factory.getHttpService();String token = "token 5cd61e10d242937a13ec40f671db19d5";Call<ResponseBody> call = hs.list(token);call.enqueue(new Callback<ResponseBody>() {    @Override    public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {        try {            ResponseBody body = response.body();            if (body != null) {                Log.d(TAG, body.string());            }        } catch (IOException e) {            Log.e(TAG, e.getMessage());        }    }    @Override    public void onFailure(Call<ResponseBody> call, Throwable t) {        if(t.getClass().equals(SocketTimeoutException.class)) {            Toast.makeText(MainActivity.this, "Connect Timeout...", Toast.LENGTH_SHORT).show();            String msg = t.getMessage();            Log.e(TAG, msg);        }    }});

简单的使用方法，Retrofit有更多的接口方法可供使用。

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