RxJava+Retrofit+OkHttp實現(xiàn)文件上傳

更新時間：2017年11月17日 10:06:39 作者：wzgiceman

本篇文章主要介紹了RxJava+Retrofit+OkHttp實現(xiàn)文件上傳，小編覺得挺不錯的，現(xiàn)在分享給大家，也給大家做個參考。一起跟隨小編過來看看吧

背景

在實際運用中上傳是一個必不可少的功能，所以我們在封裝二的基礎(chǔ)上加入上傳的功能，同時需要附帶上傳進度！

效果

實現(xiàn)

1.定義service接口

注意：Multipart是指定大文件上傳過程中的標示，一般上傳圖片的過程中我們需要附帶信息，所以我們需要用到@part指定傳遞的數(shù)值，MultipartBody.Part是指定傳遞的文件；

  /*上傳文件*/
  @Multipart
  @POST("AppYuFaKu/uploadHeadImg")
  Observable<BaseResultEntity<UploadResulte>> uploadImage(@Part("uid") RequestBody uid, @Part("auth_key") RequestBody auth_key,@Part MultipartBody.Part file);

2.加入進度條

retrofit是基于okhttp的處理，所以我們可以自定義RequestBody，復(fù)寫writeTo(BufferedSink sink)方法，得到傳遞的進度數(shù)據(jù)

public class ProgressRequestBody extends RequestBody {
  //實際的待包裝請求體
  private final RequestBody requestBody;
  //進度回調(diào)接口
  private final UploadProgressListener progressListener;
  //包裝完成的BufferedSink
  private BufferedSink bufferedSink;

  public ProgressRequestBody(RequestBody requestBody, UploadProgressListener progressListener) {
    this.requestBody = requestBody;
    this.progressListener = progressListener;
  }
  /**
   * 重寫調(diào)用實際的響應(yīng)體的contentType
   * @return MediaType
   */
  @Override
  public MediaType contentType() {
    return requestBody.contentType();
  }
  /**
   * 重寫調(diào)用實際的響應(yīng)體的contentLength
   * @return contentLength
   * @throws IOException 異常
   */
  @Override
  public long contentLength() throws IOException {
    return requestBody.contentLength();
  }
  /**
   * 重寫進行寫入
   * @param sink BufferedSink
   * @throws IOException 異常
   */
  @Override
  public void writeTo(BufferedSink sink) throws IOException {
    if (null == bufferedSink) {
      bufferedSink = Okio.buffer(sink(sink));
    }
    requestBody.writeTo(bufferedSink);
    //必須調(diào)用flush，否則最后一部分數(shù)據(jù)可能不會被寫入
    bufferedSink.flush();
  }
  /**
   * 寫入，回調(diào)進度接口
   * @param sink Sink
   * @return Sink
   */
  private Sink sink(Sink sink) {
    return new ForwardingSink(sink) {
      //當前寫入字節(jié)數(shù)
      long writtenBytesCount = 0L;
      //總字節(jié)長度，避免多次調(diào)用contentLength()方法
      long totalBytesCount = 0L;
      @Override
      public void write(Buffer source, long byteCount) throws IOException {
        super.write(source, byteCount);
        //增加當前寫入的字節(jié)數(shù)
        writtenBytesCount += byteCount;
        //獲得contentLength的值，后續(xù)不再調(diào)用
        if (totalBytesCount == 0) {
          totalBytesCount = contentLength();
        }
        Observable.just(writtenBytesCount).observeOn(AndroidSchedulers.mainThread()).subscribe(new Action1<Long>() {
          @Override
          public void call(Long aLong) {
            progressListener.onProgress(writtenBytesCount, totalBytesCount);
          }
        });
      }
    };
  }
}

3自定義接口，回調(diào)progress進度

public interface UploadProgressListener {
  /**
   * 上傳進度
   * @param currentBytesCount
   * @param totalBytesCount
   */
  void onProgress(long currentBytesCount, long totalBytesCount);
}

4創(chuàng)建RequestBody對象，加入進度

 File file=new File("/storage/emulated/0/Download/11.jpg");
   RequestBody requestBody=RequestBody.create(MediaType.parse("image/jpeg"),file);
   MultipartBody.Part part= MultipartBody.Part.createFormData("file_name", file.getName(), new ProgressRequestBody(requestBody,
       new UploadProgressListener() {
     @Override
     public void onProgress(long currentBytesCount, long totalBytesCount) {
       tvMsg.setText("提示:上傳中");
       progressBar.setMax((int) totalBytesCount);
       progressBar.setProgress((int) currentBytesCount);
     }
   }));

5.傳遞附帶信息

和封裝二中post請求的方式一樣，我們需要繼承baseentity，復(fù)寫里面的方法，然后設(shè)置需要傳遞的參數(shù)，因為是測試接口，所以我的參數(shù)直接寫死在entity里面,part文件動態(tài)指定

/**
 * 上傳請求api
 * Created by WZG on 2016/10/20.
 */

public class UplaodApi extends BaseEntity {
  /*需要上傳的文件*/
  private MultipartBody.Part part;


  public UplaodApi(HttpOnNextListener listener, RxAppCompatActivity rxAppCompatActivity) {
    super(listener, rxAppCompatActivity);
    setShowProgress(true);
  }

  public MultipartBody.Part getPart() {
    return part;
  }

  public void setPart(MultipartBody.Part part) {
    this.part = part;
  }

  @Override
  public Observable getObservable(HttpService methods) {
    RequestBody uid= RequestBody.create(MediaType.parse("text/plain"), "4811420");
    RequestBody key = RequestBody.create(MediaType.parse("text/plain"), "21f8d9bcc50c6ac1ae1020ce12f5f5a7");
    return methods.uploadImage(uid,key,getPart());
  }
}

6.post請求處理

請求和封裝二中的請求一樣，通過傳遞一個指定的HttpOnNextListener 對象來回調(diào)來監(jiān)聽結(jié)果信息，一一對應(yīng)

 private void uploadeDo(){
   File file=new File("/storage/emulated/0/Download/11.jpg");
   RequestBody requestBody=RequestBody.create(MediaType.parse("image/jpeg"),file);
   MultipartBody.Part part= MultipartBody.Part.createFormData("file_name", file.getName(), new ProgressRequestBody(requestBody,
       new UploadProgressListener() {
     @Override
     public void onProgress(long currentBytesCount, long totalBytesCount) {
       tvMsg.setText("提示:上傳中");
       progressBar.setMax((int) totalBytesCount);
       progressBar.setProgress((int) currentBytesCount);
     }
   }));
   UplaodApi uplaodApi = new UplaodApi(httpOnNextListener,this);
   uplaodApi.setPart(part);
   HttpManager manager = HttpManager.getInstance();
   manager.doHttpDeal(uplaodApi);
 }


  /**
   * 上傳回調(diào)
   */
  HttpOnNextListener httpOnNextListener=new HttpOnNextListener<UploadResulte>() {
    @Override
    public void onNext(UploadResulte o) {
      tvMsg.setText("成功");
      Glide.with(MainActivity.this).load(o.getHeadImgUrl()).skipMemoryCache(true).into(img);
    }

    @Override
    public void onError(Throwable e) {
      super.onError(e);
      tvMsg.setText("失敗："+e.toString());
    }

  };

以上就是本文的全部內(nèi)容，希望對大家的學習有所幫助，也希望大家多多支持腳本之家。

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