Retrofit2源码解析（三）添加 RxJavaCallAdapterFactory适配器

来源：互联网发布：良辰好景知几何书包网编辑：程序博客网时间：2024/06/10 17:23

1、获取实例时，我们再添加一个适配器

        retrofit = new Retrofit.Builder().baseUrl("http://localhost:8080/campus/")                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())                .addConverterFactory(JacksonConverterFactory.create())                .build();

老规则，这里只是添加了一个适配器，所以上面两篇的返回类型还是支持的。

看下RxJavaCallAdapterFactory的源码,代码比较多，但我们只需要看 CallAdapter

retrofit2.adapter.rxjava.RxJavaCallAdapterFactory.java//支持返回类型为rx.Observable、rx.Single、rx.Completable//根据不同的类型生成对应的CallAdapter的实现类  @Override  public CallAdapter<?> get(Type returnType, Annotation[] annotations, Retrofit retrofit) {    Class<?> rawType = getRawType(returnType);    String canonicalName = rawType.getCanonicalName();    boolean isSingle = "rx.Single".equals(canonicalName);    boolean isCompletable = "rx.Completable".equals(canonicalName);    if (rawType != Observable.class && !isSingle && !isCompletable) {      return null;    }    if (!isCompletable && !(returnType instanceof ParameterizedType)) {      String name = isSingle ? "Single" : "Observable";      throw new IllegalStateException(name + " return type must be parameterized"          + " as " + name + "<Foo> or " + name + "<? extends Foo>");    }    if (isCompletable) {      return CompletableHelper.createCallAdapter(scheduler);    }    CallAdapter<Observable<?>> callAdapter = getCallAdapter(returnType, scheduler);    if (isSingle) {      return SingleHelper.makeSingle(callAdapter);    }    return callAdapter;  }

所以再在可以将接口改成如下

    public interface HttpLoginRx {        @POST("account/login")        Observable<HashMap<String, Object>> login(@Body Account account);    }

也是ok的。

0 0