本文主要是介绍RxJava2 / RxAndroid2操作符distinct去重，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
distinct去除重复的数据，例如：
package zhangphil.app;import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.disposables.CompositeDisposable;
import io.reactivex.observers.DisposableObserver;
import io.reactivex.schedulers.Schedulers;public class MainActivity extends AppCompatActivity {private final String TAG = getClass().getSimpleName();private CompositeDisposable mCompositeDisposable = new CompositeDisposable();private Integer[] test_data = {1, 2, 2, 3, 4, 5, 5, 6, 7, 7, 8, 9}; //故意设置若干重复的数据，等待去重复数据@Overridepublic void onCreate(@Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);test();}private void test() {DisposableObserver disposableObserver = new DisposableObserver<Integer>() {@Overridepublic void onNext(Integer i) {Log.d(TAG, "#####开始#####");Log.d("数据", String.valueOf(i));Log.d(TAG, "#####结束#####");}@Overridepublic void onComplete() {Log.d(TAG, "onComplete");}@Overridepublic void onError(Throwable e) {Log.e(TAG, e.toString(), e);}};Observable<Integer> observable = Observable.fromArray(test_data);mCompositeDisposable.add(observable.subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).distinct().subscribeWith(disposableObserver));}@Overrideprotected void onDestroy() {super.onDestroy();// 如果退出程序，就清除后台任务mCompositeDisposable.clear();}
}
代码输出：
05-18 10:19:32.361 2346-2346/zhangphil.app D/MainActivity: #####开始#####
05-18 10:19:32.361 2346-2346/zhangphil.app D/数据: 1
05-18 10:19:32.361 2346-2346/zhangphil.app D/MainActivity: #####结束#####
05-18 10:19:32.362 2346-2346/zhangphil.app D/MainActivity: #####开始#####
05-18 10:19:32.362 2346-2346/zhangphil.app D/数据: 2
05-18 10:19:32.362 2346-2346/zhangphil.app D/MainActivity: #####结束#####
05-18 10:19:32.362 2346-2346/zhangphil.app D/MainActivity: #####开始#####
05-18 10:19:32.362 2346-2346/zhangphil.app D/数据: 3
05-18 10:19:32.362 2346-2346/zhangphil.app D/MainActivity: #####结束#####
05-18 10:19:32.362 2346-2346/zhangphil.app D/MainActivity: #####开始#####
05-18 10:19:32.362 2346-2346/zhangphil.app D/数据: 4
05-18 10:19:32.362 2346-2346/zhangphil.app D/MainActivity: #####结束#####
05-18 10:19:32.362 2346-2346/zhangphil.app D/MainActivity: #####开始#####
05-18 10:19:32.362 2346-2346/zhangphil.app D/数据: 5
05-18 10:19:32.362 2346-2346/zhangphil.app D/MainActivity: #####结束#####
05-18 10:19:32.362 2346-2346/zhangphil.app D/MainActivity: #####开始#####
05-18 10:19:32.362 2346-2346/zhangphil.app D/数据: 6
05-18 10:19:32.362 2346-2346/zhangphil.app D/MainActivity: #####结束#####
05-18 10:19:32.362 2346-2346/zhangphil.app D/MainActivity: #####开始#####
05-18 10:19:32.362 2346-2346/zhangphil.app D/数据: 7
05-18 10:19:32.362 2346-2346/zhangphil.app D/MainActivity: #####结束#####
05-18 10:19:32.362 2346-2346/zhangphil.app D/MainActivity: #####开始#####
05-18 10:19:32.362 2346-2346/zhangphil.app D/数据: 8
05-18 10:19:32.362 2346-2346/zhangphil.app D/MainActivity: #####结束#####
05-18 10:19:32.362 2346-2346/zhangphil.app D/MainActivity: #####开始#####
05-18 10:19:32.362 2346-2346/zhangphil.app D/数据: 9
05-18 10:19:32.362 2346-2346/zhangphil.app D/MainActivity: #####结束#####
05-18 10:19:32.362 2346-2346/zhangphil.app D/MainActivity: onComplete
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