Retrofit框架基本使用

什么是Retrofit框架?

    Retrofit(出自square)是一个android 平台上一个http请求库，使得网络请求变的更加容易，从而让开发者有更多把重心心放在业务逻辑处理上.

Retrofit Api调用
场景:从网络获取数据并转换成相应的bean
1.引入Retrofit相关库

   compile 'com.squareup.retrofit2:retrofit:2.0.2'
   compile 'com.squareup.retrofit2:converter-gson:2.0.2'
   compile 'com.squareup.retrofit2:adapter-rxjava:2.0.2'
   compile 'io.reactivex:rxandroid:1.1.0'

2.编写请求api

public interface JokeService {
    @Headers("apikey:d21e61b696755d2ca3d1d3484bcc5331")
    @GET("showapi_open_bus/showapi_joke/joke_text")
    Call<ArrayList<JokeBean>> listJokes(@Query("page") String page);

    @Headers("apikey:d21e61b696755d2ca3d1d3484bcc5331")
    @GET("showapi_open_bus/showapi_joke/joke_text")
    Observable<ArrayList<JokeBean>> listJokesRx(@Query("page") String page);
}

3.构建Retrofit对象和发送请求

        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("http://apis.baidu.com/")
                .addConverterFactory(MyConverterFactory.create())
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                .build();
        JokeService service = retrofit.create(JokeService.class);
        Call<ArrayList<JokeBean>> call = service.listJokes(1 + "");
        call.enqueue(new Callback<ArrayList<JokeBean>>() {
            @Override
            public void onResponse(Call<ArrayList<JokeBean>> call, Response<ArrayList<JokeBean>> response) {
                Log.e("Retrofit", response.body().toString());
            }

            @Override
            public void onFailure(Call<ArrayList<JokeBean>> call, Throwable t) {
                Toast.makeText(MainActivity.this, "" + t.getMessage(), Toast.LENGTH_SHORT).show();
            }
        });

结合RxJava

        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("http://apis.baidu.com/")
                .addConverterFactory(MyConverterFactory.create())
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                .build();
        JokeService service = retrofit.create(JokeService.class);
        Observable<ArrayList<JokeBean>> observable = service.listJokesRx("" + 1);
        observable.subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread()).subscribe(new Subscriber<ArrayList<JokeBean>>() {
            @Override
            public void onCompleted() {
                Toast.makeText(getApplicationContext(), "Completed", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onError(Throwable e) {
                e.printStackTrace();
                Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onNext(ArrayList<JokeBean> jokeBeans) {
                Log.e("Retrofit", jokeBeans.toString());
            }
        });

demo下载地址:
http://download.csdn.net/detail/qinwei1993/9497163