Rxjava关键词搜索

导入依赖

    def retrofit_version = "2.1.0"
    def rxjava_version = "2.0.1"

    //RxJava的依赖包
    implementation 'io.reactivex.rxjava2:rxjava:' + rxjava_version
    //RxAndroid的依赖包
    implementation 'io.reactivex.rxjava2:rxandroid:' + rxjava_version

    //RxBinding
    implementation 'com.jakewharton.rxbinding2:rxbinding:2.1.1'

例子

 RxTextView
                .textChanges(editText)
                //满足一定时间延时后才发射数据
                .debounce(1,TimeUnit.SECONDS)
                //过滤数据，过滤掉空值
                .filter(new Predicate<CharSequence>() {
                    @Override
                    public boolean test(CharSequence charSequence) throws Exception {
                        return charSequence.toString().trim().length()>0;
                    }
                })
                //对输入框的监听要在主线程
                .subscribeOn(AndroidSchedulers.mainThread())
                //模拟请求网络操做，switchMap类似于flatMap，switchMap会丢弃之前的数据
                //switchMap将Observable发射的数据集合变换为一个Observables集合，然后只发射这些Observerables最近发射的数据
                .switchMap(new Function<CharSequence, ObservableSource<List<String>>>() {
                    @Override
                    public ObservableSource<List<String>> apply(CharSequence charSequence) throws Exception {
                        Log.d(TAG, "flatMap: "+charSequence);
                        List<String> list = new ArrayList<>();
                        list.add(charSequence.toString()+"1");
                        list.add(charSequence.toString()+"2");
                        return Observable.just(list);
                    }
                })
                //对于上面的请求网络的操作，要放在io线程中
                .subscribeOn(Schedulers.io())
                //事件的消费，切换回主线程
                .observeOn(AndroidSchedulers.mainThread())
                //事件的消费
                .subscribe(new Consumer<List<String>>() {
                    @Override
                    public void accept(List<String> strings) throws Exception {
                        Log.d(TAG, "subscribe: "+strings);
                    }
                });

结果

2018-12-05 00:23:58.359 26487-26520/com.example.zhangyu.myrxjava D/MainActivity: flatMap: 啊啊啊
2018-12-05 00:23:58.365 26487-26487/com.example.zhangyu.myrxjava D/MainActivity: subscribe: [啊啊啊1, 啊啊啊2]
2018-12-05 00:24:02.183 26487-26520/com.example.zhangyu.myrxjava D/MainActivity: flatMap: 啊啊啊吧
2018-12-05 00:24:02.184 26487-26487/com.example.zhangyu.myrxjava D/MainActivity: subscribe: [啊啊啊吧1, 啊啊啊吧2]