Rxjava操作符

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1、map(）操作符（一对一的转化）

Observable.just("Hello")                .map(new Func1<String, String>() {                    @Override                    public String call(String s) {                        return s + "rxjava";                    }                }).subscribe(new Action1<String>() {            @Override            public void call(String s) {                Log.d("s", s);            }        });

lambda表达式

 Observable                .just("hello")                .map(s -> s+"rxjava")                .subscribe(s -> Log.d("s",s));

2、flapMap()：一对多

Student[] students = ...;Subscriber<Course> subscriber = new Subscriber<Course>() {    @Override    public void onNext(Course course) {        Log.d(tag, course.getName());    }    ...};Observable.from(students)    .flatMap(new Func1<Student, Observable<Course>>() {        @Override        public Observable<Course> call(Student student) {            return Observable.from(student.getCourses());        }    })    .subscribe(subscriber);

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