RxJava1变换原理
1)Observable.from(students) .map(new Func1<Student, String>() {
@Override
public String call(Student student) {
return student.getName(); }
});//生成新的Observable
2)map的原理是lift变换
总结:1,原Observable.map()生成新的NewObservable和新的NewOnSubscribe
2,NewObservable.subscribe(OldSubscriber),调用NewOnSubscribe的call方法
3,在NewOnSubscribe的call方法中通过原来的Operator生成新的NewSubscriber,调用原OnSubscribe.call(NewSubscriber);执行新的NewSubscriber的onNext()方法;
4,,在NewSubscriber的onNext中生成新的数据value,然后调用OldSubscriber.onNext(value);转换完成