adapter-rxjava2源码Unable to create call adapter for io.reactivex.Flowable

看一个例子：
先定义好接口

public interface APIInterface{
	@GET("/admin/login")
	Flowable<ResponseBody> getEntity(@Query("userName") String userName,
                                   @Query("password") String password);
    }

先看出问题的写法：

Retrofit retrofit = new Retrofit.Builder()
	.baseUrl("http://10.0.2.2:8080")
	.addConverterFactory(GsonConverterFactory.create())
	.build();
APIInterface service = retrofit.create(APIInterface.class);
service.getEntity("aaa","123")
	.subscribeOn(Schedulers.io())
	.observeOn(AndroidSchedulers.mainThread())
 	.subscribe(new ResourceSubscriber<ResponseBody>() {
		@Override
		public void onNext(ResponseBody responseBody) {
			Log.w("打印", "结果是"+responseBody.toString());
		}
		@Override
		public void onError(Throwable t) {}
		@Override
		public void onComplete() {}
});

然后抛出异常：

解决办法：
gradle中倒包：

implementation 'com.squareup.retrofit2:adapter-rxjava2:2.5.0'

代码中修改

Retrofit retrofit = new Retrofit.Builder()
	.baseUrl("http://10.0.2.2:8080")
	.addCallAdapterFactory(RxJava2CallAdapterFactory.create())
	.addConverterFactory(GsonConverterFactory.create())
	.build();
...
...

看下RxJava2CallAdapterFactory.create()源码中都做了什么：

private RxJava2CallAdapterFactory(@Nullable Scheduler scheduler, boolean isAsync) {
	this.scheduler = scheduler;
    this.isAsync = isAsync;
}