跟我学编程：Android Okhttp框架以文件形式上传图片代码

如何在Android  Okhttp框架以文件形式上传图片？网友“听海”写了这段代码，昌晖仪表在此分享给大家。


以Post为例
public Observable<String> postImageview(final String url, final  MultipartBody requestBody){
        //创建被观察者
        Observable<String> observable = Observable.create(new Observable.OnSubscribe<String>(){
            @Override
            public void call(Subscriber<? super String> subscriber) {
                final Subscriber mSubscriber=subscriber;
                //没有取消订阅的时候
                if(!mSubscriber.isUnsubscribed()){
                    //构建post请求
                    Request request=null;
                    String cookie=CliniciansApplication.getOkhttpCookie();
                    if(!BooleanUtils.isEmpty(cookie)){
                        request=new Request.Builder()
                                .addHeader("cookie",cookie)
                                .url(url)
                                .post(requestBody)
                                .build();
                    }else{
                        request=new Request.Builder()
                                .url(url)
                                .post(requestBody)
                                .build();
                    }
                    if(mOkHttpClient!=null){
                        mOkHttpClient.newCall(request).enqueue(new Callback() {
                            @Override
                            public void onFailure(Call call, IOException e) {
                                //通知订阅者的错误信息
                                mSubscriber.onError(e);
                            }

                            @Override
                            public void onResponse(Call call, Response response) throws IOException {
                                if(null!=response){//response 不为空
                                    if(response.isSuccessful()){//response 请求成功
                                        //通知订阅者的成功信息
                                        mSubscriber.onNext(response.body().string());
                                    }else{//response 请求失败
                                        //通知订阅者的错误信息
                                        IOException IOExceptionx=new IOException();
                                        mSubscriber.onError(IOExceptionx);
                                    }
                                }else{//response 为空
                                    //通知订阅者的错误信息
                                    IOException IOExceptionx=new IOException();
                                    mSubscriber.onError(IOExceptionx);
                                }
                                //通知完毕
                                mSubscriber.onCompleted();
                            }
                        });
                    }
                }
            }
        });
        return observable;
    }

调用

private void uploadAva(final String posturl,final File file,final String path){
        if((null!=mRxAndroidOkhttp)&&(null!=file)){
            showProgressDialogs();
            MultipartBody.Builder builder = new MultipartBody.Builder().setType(MultipartBody.FORM);
            builder.addFormDataPart("files", file.getName(), RequestBody.create(MediaType.parse("image/png"), file));
            builder.addFormDataPart("sePath","avatar");
            MultipartBody requestBody = builder.build();
            //observable定义被观察者
            mObservable=mRxAndroidOkhttp.postImageview(posturl,requestBody);
            if(null!=mObservable){
                //定义观察者
                Subscriber<String> mSubscriber=new Subscriber<String>(){
                    @Override
                    public void onCompleted() {

                    }

                    @Override
                    public void onError(Throwable e) {
                        dismissProgressDialogs();
                        toast.showToast(StringConstant.errorstate1);
                    }

                    @Override
                    public void onNext(String s) {
                        parseAva(s,path);
                    }
                };

                /**
                 * 订阅者关联被观察者
                 * Schedulers.io()说明是输入输出的计划任务
                 * AndroidSchedulers.mainThread()说明订阅者是中ui主线程中执行
                 * */

                mObservable.subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(mSubscriber);
            }
        }
    }