RxJava+Retrofit+OkHttp深入浅出-终极封装三（文件上传）

RxJava+Retrofit+OkHttp封装三（文件上传带进度）

背景

在实际运用中上传是一个必不可少的功能，所以我们在封装二的基础上加入上传的功能，同时需要附带上传进度！

效果

实现

1.定义service接口

注意：Multipart是指定大文件上传过程中的标示，一般上传图片的过程中我们需要附带信息，所以我们需要用到@part指定传递的数值，MultipartBody.Part是指定传递的文件；

    /*上传文件*/
    @Multipart
    @POST("AppYuFaKu/uploadHeadImg")
    Observable> uploadImage(@Part("uid") RequestBody uid, @Part("auth_key") RequestBody  auth_key,                                                         @Part MultipartBody.Part file);

2.加入进度条

retrofit是基于okhttp的处理，所以我们可以自定义RequestBody，复写writeTo(BufferedSink sink)方法，得到传递的进度数据

public class ProgressRequestBody extends RequestBody {
    //实际的待包装请求体
    private final RequestBody requestBody;
    //进度回调接口
    private final UploadProgressListener progressListener;
    //包装完成的BufferedSink
    private BufferedSink bufferedSink;

    public ProgressRequestBody(RequestBody requestBody, UploadProgressListener progressListener) {
        this.requestBody = requestBody;
        this.progressListener = progressListener;
    }
    /**
     * 重写调用实际的响应体的contentType
     * @return MediaType
     */
    @Override
    public MediaType contentType() {
        return requestBody.contentType();
    }
    /**
     * 重写调用实际的响应体的contentLength
     * @return contentLength
     * @throws IOException 异常
     */
    @Override
    public long contentLength() throws IOException {
        return requestBody.contentLength();
    }
    /**
     * 重写进行写入
     * @param sink BufferedSink
     * @throws IOException 异常
     */
    @Override
    public void writeTo(BufferedSink sink) throws IOException {
        if (null == bufferedSink) {
            bufferedSink = Okio.buffer(sink(sink));
        }
        requestBody.writeTo(bufferedSink);
        //必须调用flush，否则最后一部分数据可能不会被写入
        bufferedSink.flush();
    }
    /**
     * 写入，回调进度接口
     * @param sink Sink
     * @return Sink
     */
    private Sink sink(Sink sink) {
        return new ForwardingSink(sink) {
            //当前写入字节数
            long writtenBytesCount = 0L;
            //总字节长度，避免多次调用contentLength()方法
            long totalBytesCount = 0L;
            @Override
            public void write(Buffer source, long byteCount) throws IOException {
                super.write(source, byteCount);
                //增加当前写入的字节数
                writtenBytesCount += byteCount;
                //获得contentLength的值，后续不再调用
                if (totalBytesCount == 0) {
                    totalBytesCount = contentLength();
                }
                Observable.just(writtenBytesCount).observeOn(AndroidSchedulers.mainThread()).subscribe(new Action1() {
                    @Override
                    public void call(Long aLong) {
                        progressListener.onProgress(writtenBytesCount, totalBytesCount);
                    }
                });
            }
        };
    }
}

3自定义接口，回调progress进度

public interface UploadProgressListener {
    /**
     * 上传进度
     * @param currentBytesCount
     * @param totalBytesCount
     */
    void onProgress(long currentBytesCount, long totalBytesCount);
}

4创建RequestBody对象，加入进度

 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:上传中");
              progressBar.setMax((int) totalBytesCount);
              progressBar.setProgress((int) currentBytesCount);
          }
      }));

5.传递附带信息

和封装二中post请求的方式一样，我们需要继承baseentity，复写里面的方法，然后设置需要传递的参数，因为是测试接口，所以我的参数直接写死在entity里面,part文件动态指定

/**
 * 上传请求api
 * Created by WZG on 2016/10/20.
 */

public class UplaodApi extends BaseEntity {
    /*需要上传的文件*/
    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请求处理

请求和封装二中的请求一样，通过传递一个指定的HttpOnNextListener 对象来回调来监听结果信息，一一对应

  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:上传中");
              progressBar.setMax((int) totalBytesCount);
              progressBar.setProgress((int) currentBytesCount);
          }
      }));
      UplaodApi uplaodApi = new UplaodApi(httpOnNextListener,this);
      uplaodApi.setPart(part);
      HttpManager manager = HttpManager.getInstance();
      manager.doHttpDeal(uplaodApi);
  }


    /**
     * 上传回调
     */
    HttpOnNextListener httpOnNextListener=new HttpOnNextListener() {
        @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("失败："+e.toString());
        }

    };

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终极封装专栏

RxJava+Retrofit+OkHttp深入浅出-终极封装专栏）

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源码

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