Android uses Retrofit form to upload multiple pictures

Android uses Retrofit form to upload multiple pictures

1.ApiService interface declaration method

1.1 In headers, you can add the business’s own header parameters.

@Multipart
@POST("api/uploadPic")
fun uploadFiles(
@HeaderMap headers: HashMap<String, String?>
@Part parts: List<MultipartBody.Part>
): Call<UploadResponse>

1.2 Create retrofit and initiate a request

Retrofit retrofit=new Retrofit.Builder()
                        .baseUrl("http:xxx")
                        .addConverterFactory(GsonConverterFactory.create())
                        .build();

The server requires the file to be placed in the body in the form of an array, and the key is files. value file array.

 val service = retrofit.create(ApiService::class.java)
        val body = Utils.picToRequestBody("files",list)
        val headers = getCommonParams()
        service.uploadFiles(headers, body).enqueue(object : Callback<UploadResponse> {
    
    
            override fun onResponse(
                call: Call<UploadResponse>,
                response: Response<UploadResponse>
            ) {
    
    
              
            }

            override fun onFailure(call: Call<UploadResponse>, t: Throwable) {
    
    

            }

        })

1.3 Tools

    fun picToRequestBody(name: String, images: MutableList<Image>): List<MultipartBody.Part> {
    
    
        val parts = arrayListOf<MultipartBody.Part>()
        //多个图片文件
        for (image in images) {
    
    
            val file = File(image.path)
            val requestBody = RequestBody.create(MediaType.parse("*/*"), file)
            val part =
                MultipartBody.Part.createFormData(name, file.name, requestBody)
            parts.add(part)
        }
        return parts
    }

Result uploaded successfully

Reference article:
https://wenku.baidu.com/view/c571691264ec102de2bd960590c69ec3d5bbdb05.html