用表单数据更新Post请求

Question

我对Android系统是新手。我想上传图像作为表单数据使用改型后的方法。我正在使用com.squareup.retrofit2:retrofit:2.3.0

这是我的请求体。

Answer 1

**使界面像这样，在请求中添加“multipartbody.part”，并将您的图像路径设置为post方法，您可以使用referfit上传图像。使用这个networkclient类创建referfit实例**

public class NetworkClient {
    private static final String BASE_URL = "";
    private static Retrofit retrofit;
    public static Retrofit getRetrofitClient(Context context) {
        if (retrofit == null) {
            OkHttpClient okHttpClient = new OkHttpClient.Builder()
                    .build();
            retrofit = new Retrofit.Builder()
                    .baseUrl(BASE_URL)
                    .client(okHttpClient)
                    .addConverterFactory(GsonConverterFactory.create())
                    .build();
        }
        return retrofit;
    }

}

public interface UploadAPIs {
        @Multipart
        @POST("/upload")
        Call<ResponseBody> uploadImage(@Part MultipartBody.Part file, @Part("name") RequestBody requestBody);
    }    



     private void uploadToServer(String filePath) {
                 Retrofit retrofit = NetworkClient.getRetrofitClient(this);
                 UploadAPIs uploadAPIs = retrofit.create(UploadAPIs.class);
                 //Create a file object using file path
                 File file = new File(filePath);
                 // Create a request body with file and image media type
                 RequestBody fileReqBody = RequestBody.create(MediaType.parse("image/*"), file);
                 // Create MultipartBody.Part using file request-body,file name and part name 
                 MultipartBody.Part part = MultipartBody.Part.createFormData("upload", file.getName(), fileReqBody);
                 //Create request body with text description and text media type
                 RequestBody description = RequestBody.create(MediaType.parse("text/plain"), "image-type");
                 // 
                 Call call = uploadAPIs.uploadImage(part, description);
                 call.enqueue(new Callback() {
                     @Override
                     public void onResponse(Call call, Response response) {
                     }
                     @Override
                     public void onFailure(Call call, Throwable t) {
                     }
                 });
             }