RxJava2.x实现定时器的实例代码

package io.reactivex.disposables;

/**
 * Represents a disposable resource.
 */
public interface Disposable {
  /**
   * Dispose the resource, the operation should be idempotent.
   */
  void dispose();

  /**
   * Returns true if this resource has been disposed.
   * @return true if this resource has been disposed
   */
  boolean isDisposed();
}

  //rxjava2.x
  compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
  compile 'io.reactivex.rxjava2:rxjava:2.1.0'

/**
 * Instruction:Rxjava2.x实现定时器
 * <p>
 * Author:pei
 * Date: 2017/6/29
 * Description:
 */

public class RxTimerUtil {

  private static Disposable mDisposable;

  /** milliseconds毫秒后执行next操作
   *
   * @param milliseconds
   * @param next
   */
  public static void timer(long milliseconds,final IRxNext next) {
    Observable.timer(milliseconds, TimeUnit.MILLISECONDS)
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe(new Observer<Long>() {
          @Override
          public void onSubscribe(@NonNull Disposable disposable) {
            mDisposable=disposable;
          }

          @Override
          public void onNext(@NonNull Long number) {
            if(next!=null){
              next.doNext(number);
            }
          }

          @Override
          public void onError(@NonNull Throwable e) {
            //取消订阅
            cancel();
          }

          @Override
          public void onComplete() {
            //取消订阅
            cancel();
          }
        });
  }


  /** 每隔milliseconds毫秒后执行next操作
   *
   * @param milliseconds
   * @param next
   */
  public static void interval(long milliseconds,final IRxNext next){
    Observable.interval(milliseconds, TimeUnit.MILLISECONDS)
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe(new Observer<Long>() {
          @Override
          public void onSubscribe(@NonNull Disposable disposable) {
            mDisposable=disposable;
          }

          @Override
          public void onNext(@NonNull Long number) {
            if(next!=null){
              next.doNext(number);
            }
          }

          @Override
          public void onError(@NonNull Throwable e) {

          }

          @Override
          public void onComplete() {

          }
        });
  }


  /**
   * 取消订阅
   */
  public static void cancel(){
    if(mDisposable!=null&&!mDisposable.isDisposed()){
      mDisposable.dispose();
      LogUtil.e("====定时器取消======");
    }
  }

  public interface IRxNext{
    void doNext(long number);
  }
}

@Override
  protected void onDestroy(){
    //取消定时器
    RxTimerUtil.cancel();
    LogUtil.e("====cancel====="+ DateUtil.getNowTime());
    super.onDestroy();
  }