RxDownload.getInstance()
                  .download(url, "weixin.apk", null)
                  .subscribeOn(Schedulers.io())
                  .observeOn(AndroidSchedulers.mainThread())
                  .subscribe(new Observer<DownloadStatus>() {
                      @Override
                      public void onSubscribe(Disposable d) {
                          mDisposable = d;
                      }

                      @Override
                      public void onNext(DownloadStatus value) {
						//获得下载状态
                      }

                      @Override
                      public void onError(Throwable e) {
						//下载出错
                      }

                      @Override
                      public void onComplete() {
						//下载完成	
                      }
                  });

	 RxDownload.getInstance()
                .maxThread(10)                    //设置最大线程
                .maxRetryCount(10)                //设置下载失败重试次数
                .retrofit(myRetrofit)             //若需要自己的retrofit客户端,可在这里指定
                .defaultSavePath(defaultSavePath) //设置默认的下载路径
                .context(this)                    //自动安装需要Context
                .autoInstall(true);               //下载完成自动安装，仅限7.0以下，7.0以上自行提供FileProvider
                .download(url,savename,savepath)  //开始下载
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Observer<DownloadStatus>() {);

RxDownload rxDownload1 = RxDownload.getInstance()
  					   .maxThread(5) 
  					   .maxRetryCount(10)
  					   .defaultSavePath(defaultPath);
//download task 1: 
Disposable d1 = rxDownload1.download(url1,name1,null)...
//download task 2:  
Disposable d2 = rxDownload1.download(url2,name2,null)...  

RxDownload rxDownload2 = RxDownload.getInstance()
  					   .maxThread(10)...
//download task 3:  
Disposable d3 = rxDownload2.download(url3,name3,null)...   

Disposable disposable = RxDownload.getInstance()
                .download(url, null, null)
  				//...

//取消订阅, 即可暂停下载, 若服务端不支持断点续传,下一次下载会重新下载,反之会继续下载
if (disposable != null && !disposable.isDisposed()) {
            disposable.dispose();
}

 disposable =  RxPermissions.getInstance(mContext)
                    .request(Manifest.permission.WRITE_EXTERNAL_STORAGE) //申请存储卡权限
                    .doOnNext(new Consumer<Boolean>() {
                        @Override
                        public void accept(Boolean granted)  throws Exception {
                            if (!granted) {  //权限被拒绝
                                throw new RuntimeException("no permission");
                            }
                        }
                    })
                    .observeOn(Schedulers.io())
                    .compose(RxDownload.getInstance().<Boolean>transform(data.url, data.name, null))
                    .observeOn(AndroidSchedulers.mainThread())
                    .subscribe(new Consumer<DownloadStatus>() { ... });

  RxDownload.getInstance()
                .context(this)
                .autoInstall(true); //下载完成自动安装
                .maxDownloadNumber(3)  //设置同时最大下载数量
                .serviceDownload(url, saveName, defaultPath)
                .subscribe(new Consumer<Object>() {
                    @Override
                    public void accept(Object o) throws Exception{
                        Toast.makeText(ServiceDownloadActivity.this, "开始下载", Toast.LENGTH_SHORT).show();
                    }
                });

Disposable disposable =  mRxDownload.receiveDownloadStatus(url)
                .subscribe(new Consumer<DownloadEvent>() {
                    @Override
                    public void accept(DownloadEvent event) throws Exception {
                        //当事件为Failed时, 才会有异常信息, 其余时候为null.
                        if (event.getFlag() == DownloadFlag.FAILED) { 
                            Throwable throwable = event.getError();
                            Log.w("Error", throwable);
                        }
                        mDownloadController.setEvent(event);
                        updateProgress(event);
                    }
                });
// 取消订阅即可取消接收

public class DownloadEvent {
    private int flag = DownloadFlag.NORMAL;  //当前下载的状态
    private DownloadStatus downloadStatus = new DownloadStatus();  //下载进度

    public int getFlag() {
        return flag;
    }
    public DownloadStatus getDownloadStatus() {
        return downloadStatus;
    }
}

public class DownloadFlag {
    public static final int NORMAL = 9990;      //未下载
    public static final int WAITING = 9991;     //等待中
    public static final int STARTED = 9992;     //已开始下载
    public static final int PAUSED = 9993;      //已暂停
    public static final int CANCELED = 9994;    //已取消
    public static final int COMPLETED = 9995;   //已完成
    public static final int FAILED = 9996;      //下载失败
    public static final int INSTALL = 9997;     //安装中,暂未使用
    public static final int INSTALLED = 9998;   //已安装,暂未使用
    public static final int DELETED = 9999;     //已删除
}

 mRxDownload.pauseServiceDownload(url).subscribe();

 mRxDownload.cancelServiceDownload(url).subscribe();

mRxDownload.deleteServiceDownload(url,true or false).subscribe();

mRxDownload.getTotalDownloadRecords()
                .subscribe(new Action1<List<DownloadRecord>>() {
                    @Override
                    public void call(List<DownloadRecord> list) {
                        mAdapter.addAll(list);
                    }
                });

File file = mRxDownload.getRealFiles(saveName, defaultPath)[0];