1、打开相册

    @OnClick(R.id.But_losing)
    public void click() {
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_PICK);
        intent.setType("image/*");
        this.startActivityForResult(intent, 1);
    }

2、接收

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 1) {
            Uri uri = data.getData();//图片url
            System.out.println("url:" + uri);
            ContentResolver resolver = getContentResolver();
            Cursor query = resolver.query(uri, null, null, null, null);
            boolean first = query.moveToFirst();
            if (first) {
                try {
                    //获取图片地址
                    int columnIndex = query.getColumnIndex("_data");
                    String path = query.getString(columnIndex);
                    //调用方法  uploadImageByRetrofit( );
                    uploadImageByRetrofit(path);
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }
            }
        }
    }

3、上传图片 使用Retrofit上传图片

    private void uploadImageByRetrofit(String path) throws UnsupportedEncodingException {
        //通过OkHttpClient配置日志拦截器
        OkHttpClient client = new OkHttpClient.Builder()
                .addInterceptor(new MLanjieqqied())
                .build();
        创建 Retrofit对象
        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("https://sm.ms/")
                .client(client)
                .addCallAdapterFactory(RxJava2CallAdapterFactory.createAsync())
                .addConverterFactory(GsonConverterFactory.create())
                .build();
        //文件类型  application/octet-stream
        MediaType fileType = MediaType.parse("application/octet-stream");
        //要上传的文件对象
        File file = new File(path);
        //获得接口对象
        Album album = retrofit.create(Album.class);
        //设置请求体
        RequestBody body = RequestBody.create(fileType, file);
        String fileName = URLEncoder.encode(file.getName(), "UTF-8");
        //创建发送的文件请求体
        MultipartBody.Part filePart = MultipartBody.Part.createFormData("smfile", fileName, body);
        //文本类型  text/plain
        MediaType formatType = MediaType.parse("text/plain");
        RequestBody format = RequestBody.create(formatType, "json");
        //调用接口中方法
        Observable observable = album.uploadImage(filePart, format);
        observable.subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Observer() {
                    @Override
                    public void onSubscribe(Disposable d) {
                    }

                    @Override
                    public void onNext(Result result) {
                        System.out.println("onNext " + result.getData().getUrl());
                    }

                    @Override
                    public void onError(Throwable e) {
                        System.out.println(e.getMessage());
                    }

                    @Override
                    public void onComplete() {
                    }
                });
    }

4、接口

    public interface Album {
        StringBaseUrl="https://sm.ms/";
        @Multipart
        @POST("https://sm.ms/api/upload")
        @Headers({"User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36"})
        ObservableuploadImage(@Part MultipartBody.Part filePart, @Part("format") RequestBody format);
    }