Rxjava

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需要依赖的包

implementation 'io.reactivex.rxjava2:rxjava:2.1.3'implementation 'io.reactivex.rxjava2:rxandroid:2.0.1'

public class RxJavaDemo1Activity extends AppCompatActivity implements View.OnClickListener {    protected Button btnSend1;    protected Button btnSend2;    protected Button btnSend3;    protected Button btnSend4;    protected Button btnSend5;    protected Button btnSend6;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        super.setContentView(R.layout.activity_rx_java_demo1);        initView();    }    @Override    public void onClick(View view) {        if (view.getId() == R.id.btn_send1) {            test1();//普通使用        } else if (view.getId() == R.id.btn_send2) {            test2();//链式调用        } else if (view.getId() == R.id.btn_send3) {            test3();//发送中,中断.        } else if (view.getId() == R.id.btn_send4) {            test4();//只关心onnext事件的操作        } else if (view.getId() == R.id.btn_send5) {            test5();//        } else if (view.getId() == R.id.btn_send6) {            test6();        }    }    private void test6() {        DialogUtil.showListDialog(this, "rxjava的操作符号使用", new String[]{                "0map()操作符",                "1flatMap()操作符",                "2filter()操作符",                "3take()操作符",                "4doOnNext()操作符",        }, new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                switch (which) {                    case 0:                        map0();                        break;                    case 1:                        map1();                        break;                    case 2:                        map2();                        break;                    case 3:                        map3();                        break;                    case 4:                        map4();                        break;                }            }        });    }    private void map4() {//        4doOnNext()操作符        Observable.just(new ArrayList<String>(){            {                for (int i = 0; i < 6; i++) {                    add("data"+i);                }            }        }).flatMap(new Function<List<String>, ObservableSource<?>>() {            @Override            public ObservableSource<?> apply(List<String> strings) throws Exception {                return Observable.fromIterable(strings);            }        }).take(5).doOnNext(new Consumer<Object>() {            @Override            public void accept(Object o) throws Exception {                DemonstrateUtil.showLogResult("额外的准备工作!");            }        }).subscribe(new Consumer<Object>() {            @Override            public void accept(Object s) throws Exception {                DemonstrateUtil.showLogResult(s.toString());            }        });    }    private void map3() {//        3take()操作符        Observable.just(new ArrayList<String>(){            {                for (int i = 0; i < 8; i++) {                    add("data"+i);                }            }        }).flatMap(new Function<List<String>, ObservableSource<?>>() {            @Override            public ObservableSource<?> apply(List<String> strings) throws Exception {                return Observable.fromIterable(strings);            }        }).take(5).subscribe(new Consumer<Object>() {            @Override            public void accept(Object s) throws Exception {                DemonstrateUtil.showLogResult(s.toString());            }        });    }    private void map2() {        Observable                .just(new ArrayList<String>(){                    {                        for (int i = 0; i < 5; i++) {                            add("data"+i);                        }                    }                })                .flatMap(new Function<List<String>, ObservableSource<?>>() {                    @Override                    public ObservableSource<?> apply(List<String> strings) throws Exception {                        return Observable.fromIterable(strings);                    }                }).filter(new Predicate<Object>() {            @Override            public boolean test(Object s) throws Exception {                String newStr = (String) s;                if (newStr.contains("3")){                    return true;                }                return false;            }        }).subscribe(new Consumer<Object>() {            @Override            public void accept(Object o) throws Exception {                DemonstrateUtil.showLogResult((String)o);            }        });    }    private void map1() {//        1flatMap()操作符        Observable.just(new ArrayList<String>(){            {                for (int i = 0; i < 3; i++) {                    add("data"+i);                }            }        }).flatMap(new Function<List<String>, ObservableSource<?>>() {            @Override            public ObservableSource<?> apply(List<String> strings) throws Exception {                return Observable.fromIterable(strings);            }        }).subscribe(new Observer<Object>() {            @Override            public void onSubscribe(Disposable d) {            }            @Override            public void onNext(Object o) {                DemonstrateUtil.showLogResult("flatMap转换后,接收到的"+o);            }            @Override            public void onError(Throwable e) {            }            @Override            public void onComplete() {            }        });    }    private void map0() {//        0map()操作符        Observable.just("hellorxjava")                .map(new Function<String, Integer>() {                    @Override                    public Integer apply(String s) throws Exception {                        return s.length();                    }                }).subscribe(new Observer<Integer>() {            @Override            public void onSubscribe(Disposable d) {            }            @Override            public void onNext(Integer integer) {                DemonstrateUtil.showLogResult("接收到被转换的数据结果:"+integer);            }            @Override            public void onError(Throwable e) {            }            @Override            public void onComplete() {            }        });    }    private void test5() {        DialogUtil.showListDialog(this, "rxjava的其他操作", new String[]{                "0just()方式创建Observable",                "1fromIterable()方式创建Observable",                "2defer()方式创建Observable",                "3interval( )方式创建Observable",                "4timer( )方式创建Observable",                "5range( )方式创建Observable",                "6repeat( )方式创建Observable",        }, new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                switch (which) {                    case 0:                        other0();                        break;                    case 1:                        other1();                        break;                    case 2:                        other2();                        break;                    case 3:                        other3();                        break;                    case 4:                        other4();                        break;                    case 5:                        other5();                        break;                    case 6:                        other6();                        break;                }            }        });    }    private void other6() {//        6repeat( )方式创建Observable        Observable.just(123).repeat().subscribe(new Observer<Integer>() {            @Override            public void onSubscribe(Disposable d) {            }            @Override            public void onNext(Integer integer) {                DemonstrateUtil.showLogResult("重复integer" + integer);            }            @Override            public void onError(Throwable e) {            }            @Override            public void onComplete() {            }        });    }    private void other5() {//        5range( )方式创建Observable        Observable.range(1, 5).subscribe(new Observer<Integer>() {            @Override            public void onSubscribe(Disposable d) {            }            @Override            public void onNext(Integer integer) {                DemonstrateUtil.showLogResult("连续收到:" + integer);            }            @Override            public void onError(Throwable e) {            }            @Override            public void onComplete() {            }        });    }    private void other4() {//        4timer( )方式创建Observable        Observable.timer(5, TimeUnit.SECONDS).subscribe(new Observer<Long>() {            @Override            public void onSubscribe(Disposable d) {            }            @Override            public void onNext(Long aLong) {                DemonstrateUtil.showLogResult("延迟5s后调用了:onNext");            }            @Override            public void onError(Throwable e) {            }            @Override            public void onComplete() {            }        });    }    private void other3() {//        3interval( )方式创建Observable        Observable.interval(3, TimeUnit.SECONDS).subscribe(new Observer<Long>() {            @Override            public void onSubscribe(Disposable d) {            }            @Override            public void onNext(Long aLong) {                DemonstrateUtil.showLogResult("数字是:" + aLong);                //DemonstrateUtil.showToastResult(RxJavaDemo1Activity.this,"数字是:"+aLong);            }            @Override            public void onError(Throwable e) {            }            @Override            public void onComplete() {            }        });    }    private void other2() {        Observable<String> observable = Observable.defer(new Callable<ObservableSource<? extends String>>() {            @Override            public ObservableSource<? extends String> call() throws Exception {                return Observable.just("hello,defer");            }        });        //上游衔接下游!        observable.subscribe(new Observer<String>() {            @Override            public void onSubscribe(Disposable d) {            }            @Override            public void onNext(String s) {                DemonstrateUtil.showLogResult(s);                DemonstrateUtil.showToastResult(RxJavaDemo1Activity.this, s);            }            @Override            public void onError(Throwable e) {            }            @Override            public void onComplete() {            }        });    }    private void other1() {        Observable.fromIterable(new ArrayList<String>() {            {                for (int i = 0; i < 5; i++) {                    add("Hello," + i);                }            }        }).subscribe(new Observer<String>() {            @Override            public void onSubscribe(Disposable d) {            }            @Override            public void onNext(String s) {                DemonstrateUtil.showToastResult(RxJavaDemo1Activity.this, s);                DemonstrateUtil.showLogResult(s);            }            @Override            public void onError(Throwable e) {            }            @Override            public void onComplete() {            }        });    }    private void other0() {        Observable.just("hello,you hao!").subscribe(new Observer<String>() {            @Override            public void onSubscribe(Disposable d) {            }            @Override            public void onNext(String s) {                DemonstrateUtil.showLogResult(s);                DemonstrateUtil.showToastResult(RxJavaDemo1Activity.this, s);            }            @Override            public void onError(Throwable e) {            }            @Override            public void onComplete() {            }        });    }    private void test4() {        //只关心onnext事件的操作        Observable.create(new ObservableOnSubscribe<Integer>() {            @Override            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {                DemonstrateUtil.showLogResult("emitter 1");                emitter.onNext(1);                DemonstrateUtil.showLogResult("emitter 2");                emitter.onNext(2);                DemonstrateUtil.showLogResult("emitter 3");                emitter.onNext(3);                DemonstrateUtil.showLogResult("complete");                emitter.onComplete();                DemonstrateUtil.showLogResult("emitter 4");                emitter.onNext(4);            }        }).subscribe(new Consumer<Integer>() {            @Override            public void accept(Integer integer) throws Exception {                DemonstrateUtil.showLogResult("accept:" + integer);            }        });    }    private void test3() {//        发送中,中断.        Observable.create(new ObservableOnSubscribe<Integer>() {            @Override            public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {                DemonstrateUtil.showLogResult("emitter 1");                emitter.onNext(1);                DemonstrateUtil.showLogResult("emitter 2");                emitter.onNext(2);                DemonstrateUtil.showLogResult("emitter 3");                emitter.onNext(3);                DemonstrateUtil.showLogResult("complete");                emitter.onComplete();                DemonstrateUtil.showLogResult("emitter 4");                emitter.onNext(4);            }        }).subscribe(new Observer<Integer>() {            private Disposable mDisposable;            private int i;            @Override            public void onSubscribe(Disposable d) {                DemonstrateUtil.showLogResult("subscribe");                mDisposable = d;            }            @Override            public void onNext(Integer value) {                DemonstrateUtil.showLogResult("onNext:" + value);                i++;                if (i == 2) {                    DemonstrateUtil.showLogResult("dispose:" + value);                    mDisposable.dispose();                    DemonstrateUtil.showLogResult("isDisposed : " + mDisposable.isDisposed());                }            }            @Override            public void onError(Throwable e) {                DemonstrateUtil.showLogResult("error:");            }            @Override            public void onComplete() {                DemonstrateUtil.showLogResult("complete");            }        });    }    private void test2() {        //链式调用        Observable.create(new ObservableOnSubscribe<Integer>() {            @Override            public void subscribe(ObservableEmitter<Integer> e) throws Exception {                e.onNext(1);                e.onNext(2);                e.onNext(3);            }        }).subscribe(new Observer<Integer>() {            @Override            public void onSubscribe(Disposable d) {                DemonstrateUtil.showLogResult("onSubscribe");            }            @Override            public void onNext(Integer integer) {                DemonstrateUtil.showLogResult("onNext-->integer" + integer);            }            @Override            public void onError(Throwable e) {                DemonstrateUtil.showLogResult("onError");            }            @Override            public void onComplete() {                DemonstrateUtil.showLogResult("onComplete");            }        });    }    private void test1() {        //创建上游,数据发射源!        //ObservableOnSubscribe对象作为参数，它的作用相当于一个计划表，当 Observable被订阅的时候，        // ObservableOnSubscribe的subscribe()方法会自动被调用，事件序列就会依照设定依次触发        //ObservableEmitter,发射器,触发事件.        Observable<Integer> observable = Observable.create(new ObservableOnSubscribe<Integer>() {            @Override            public void subscribe(ObservableEmitter<Integer> e) throws Exception {                e.onNext(1);                e.onNext(2);                e.onNext(3);            }        });        //创建下游,数据接收处!        Observer<Integer> observer = new Observer<Integer>() {            @Override            public void onSubscribe(Disposable d) {                DemonstrateUtil.showLogResult("onSubscribe");            }            @Override            public void onNext(Integer integer) {                DemonstrateUtil.showLogResult("onNext--integer" + integer);            }            @Override            public void onError(Throwable e) {                DemonstrateUtil.showLogResult("onError");            }            @Override            public void onComplete() {                DemonstrateUtil.showLogResult("onComplete");            }        };        //数据源连接接收处,上游衔接下游!        //只有当上游和下游建立连接之后, 上游才会开始发送事件        observable.subscribe(observer);    }    private void initView() {        btnSend1 = (Button) findViewById(R.id.btn_send1);        btnSend1.setOnClickListener(RxJavaDemo1Activity.this);        btnSend2 = (Button) findViewById(R.id.btn_send2);        btnSend2.setOnClickListener(RxJavaDemo1Activity.this);        btnSend3 = (Button) findViewById(R.id.btn_send3);        btnSend3.setOnClickListener(RxJavaDemo1Activity.this);        btnSend4 = (Button) findViewById(R.id.btn_send4);        btnSend4.setOnClickListener(RxJavaDemo1Activity.this);        btnSend5 = (Button) findViewById(R.id.btn_send5);        btnSend5.setOnClickListener(RxJavaDemo1Activity.this);        btnSend6 = (Button) findViewById(R.id.btn_send6);        btnSend6.setOnClickListener(RxJavaDemo1Activity.this);    }}

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