Android RxJava小结

Posted 2021-01-10 程小白

一、如何使用

在build.gradle中添加依赖

 1 dependencies {
 2     api ‘io.reactivex:rxandroid:1.2.1‘
 3     api ‘io.reactivex:rxjava:1.3.0‘
 4     implementation fileTree(include: [‘*.jar‘], dir: ‘libs‘)
 5     implementation ‘com.android.support:appcompat-v7:27.1.1‘
 6     implementation ‘com.android.support.constraint:constraint-layout:1.1.3‘
 7     testImplementation ‘junit:junit:4.12‘
 8     androidTestImplementation ‘com.android.support.test:runner:1.0.2‘
 9     androidTestImplementation ‘com.android.support.test.espresso:espresso-core:3.0.2‘
10 }

这里有一个小坑，直接用latest.release没有办法用，不知道为什么

二、代码实现

2.1 使用just+Action1+Action0来实现

 1  Observable.just(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
 2                     .subscribeOn(Schedulers.io()) // Observable运行的线程
 3                     .observeOn(AndroidSchedulers.mainThread()) //监听者运行的线程
 4                     .subscribe(new Action1<Integer>() {
 5                         //onNext
 6                         @Override
 7                         public void call(Integer integer) {
 8                             log("call 1:" + integer);
 9                         }
10                     }, new Action1<Throwable>() {
11                         //onError
12                         @Override
13                         public void call(Throwable throwable) {
14                             log("call 2");
15                         }
16                     }, new Action0() {
17                         //onCompleted
18                         @Override
19                         public void call() {
20                             log("call 3");
21                         }
22                     });

运行结果如下，很简单，就不一一解释了。

 1 10-05 11:05:45.955 23619 23619 E MainActivity: yanlog msg:call 1:1
 2 10-05 11:05:45.955 23619 23619 E MainActivity: yanlog msg:call 1:2
 3 10-05 11:05:45.955 23619 23619 E MainActivity: yanlog msg:call 1:3
 4 10-05 11:05:45.955 23619 23619 E MainActivity: yanlog msg:call 1:4
 5 10-05 11:05:45.955 23619 23619 E MainActivity: yanlog msg:call 1:5
 6 10-05 11:05:45.955 23619 23619 E MainActivity: yanlog msg:call 1:6
 7 10-05 11:05:45.955 23619 23619 E MainActivity: yanlog msg:call 1:7
 8 10-05 11:05:45.955 23619 23619 E MainActivity: yanlog msg:call 1:8
 9 10-05 11:05:45.956 23619 23619 E MainActivity: yanlog msg:call 1:9
10 10-05 11:05:45.956 23619 23619 E MainActivity: yanlog msg:call 1:10
11 10-05 11:05:45.956 23619 23619 E MainActivity: yanlog msg:call 3

 2.2 使用Just+Subscriber来实现

代码如下：

            Observable.just(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
                    .subscribeOn(Schedulers.io()) // Observable运行的线程
                    .observeOn(AndroidSchedulers.mainThread()) //监听者运行的线程
                    .subscribe(new Subscriber<Integer>() {
                        @Override
                        public void onCompleted() {
                            log("onCompleted");
                        }

                        @Override
                        public void onError(Throwable e) {
                            log("onError");
                        }

                        @Override
                        public void onNext(Integer integer) {
                            log("onNext:" + integer);
                        }
                    });

运行结果如下：

 1 10-05 19:56:09.991   982   982 E MainActivity: yanlog msg:onNext:1
 2 10-05 19:56:09.991   982   982 E MainActivity: yanlog msg:onNext:2
 3 10-05 19:56:09.991   982   982 E MainActivity: yanlog msg:onNext:3
 4 10-05 19:56:09.992   982   982 E MainActivity: yanlog msg:onNext:4
 5 10-05 19:56:09.992   982   982 E MainActivity: yanlog msg:onNext:5
 6 10-05 19:56:09.992   982   982 E MainActivity: yanlog msg:onNext:6
 7 10-05 19:56:09.992   982   982 E MainActivity: yanlog msg:onNext:7
 8 10-05 19:56:09.992   982   982 E MainActivity: yanlog msg:onNext:8
 9 10-05 19:56:09.992   982   982 E MainActivity: yanlog msg:onNext:9
10 10-05 19:56:09.992   982   982 E MainActivity: yanlog msg:onNext:10
11 10-05 19:56:09.992   982   982 E MainActivity: yanlog msg:onCompleted