Android Retrofit 2.0框架上传图片解决方案


本文为大家分享了 Android Retrofit 2.0框架上传图片解决方案,具体内容如下

1.单张图片的上传

/** 
   * 上传一张图片 
   * @param description 
   * @param imgs 
   * @return 
   */ 
  @Multipart 
  @POST("/upload") 
  Call<String> uploadImage(@Part("fileName") String description, 
         @Part("file\"; filename=\"image.png\"")RequestBody imgs); 

2.多张图片的上传

/** 
  * 上传三张图片 
  * @param description 
  * @param imgs 
  * @param imgs1 
  * @param imgs3 
  * @return 
  */ 
  @Multipart 
  @POST("/upload") 
  Call<String> uploadImage(@Part("fileName") String description, 
        @Part("file\"; filename=\"image.png\"")RequestBody imgs, 
        @Part("file\"; filename=\"image.png\"")RequestBody imgs1, 
        @Part("file\"; filename=\"image.png\"")RequestBody imgs3); 

注意:目前是提供传3张,要想多上传目前我发现的方法就是想要多传一张,就多增加一个参数
@Part("file\"; filename=\"image.png\"")RequestBody imgs,以此类推。

大家看到上面觉得写法很漏,但是用于能力有限,只能想到这样。用Java中的可变参数解决之后,就只能传一张。不能多张。

@Multipart 
  @POST("/upload") 
  Call<String> uploadImage(@Part("fileName") String description, 
        @Part("file\"; filename=\"image.png\"")RequestBody ...imgs); 

 调用:
Call<String> call = apiManager.uploadImage( m[0],requestBody1,requestBody2,null); 

这样写看上去很是高端,不幸的是只能传一张

3.最后是实现胡过程
3.1创建FileUploadService接口

public interface FileUploadService {
 /**
  * 上传一张图片
  * @param description
  * @param imgs
  * @return
  */
 @Multipart
 @POST("/upload")
 Call<String> uploadImage(@Part("fileName") String description,
        @Part("file\"; filename=\"image.png\"")RequestBody imgs);

 /**
  * 上传三张图片
  * @param description
  * @param imgs
  * @param imgs1
  * @param imgs3
  * @return
  */
 @Multipart
 @POST("/upload")
 Call<String> uploadImage(@Part("fileName") String description,
        @Part("file\"; filename=\"image.png\"")RequestBody imgs,
        @Part("file\"; filename=\"image.png\"")RequestBody imgs1,
        @Part("file\"; filename=\"image.png\"")RequestBody imgs3);
}

 3.2创建Retrofit对象

 private static final Retrofit sRetrofit = new Retrofit .Builder()
   .baseUrl(ENDPOINT)
   .addConverterFactory(GsonConverterFactory.create())
//   .addCallAdapterFactory(RxJavaCallAdapterFactory.create()) // 使用RxJava作为回调适配器
   .build();

 private static final FileUploadService apiManager = sRetrofit.create(FileUploadService.class);

 3.3调用上传的方法

public static void upload(String path){

 String descriptionString = "hello, this is description speaking";

 String[] m = new String[2];
 m[0]= "share.png";
 m[1]= "Screenshot_20160128-140709.png";
 File[] ssssss= new File[2];
 File file1 = new File("/storage/emulated/0/sc/share.png");
 File file = new File("/storage/emulated/0/Pictures/ScreenShots/Screenshot_20160128-140709.png");
 ssssss[0]=file;
 ssssss[0]=file1;
 RequestBody requestBody[] = new RequestBody[3];
 RequestBody requestBody1 =
   RequestBody.create(MediaType.parse("multipart/form-data"), file);
 RequestBody requestBody2 =
   RequestBody.create(MediaType.parse("multipart/form-data"), file1);
 requestBody[0]=requestBody1;
 requestBody[1]=requestBody2;
 Call<String> call = apiManager.uploadImage( m[0],requestBody1,requestBody2,null);
 call.enqueue(new Callback<String>() {
  @Override
  public void onResponse(Response<String> response, Retrofit retrofit) {
   Log.v("Upload", response.message());
   Log.v("Upload", "success");
  }

  @Override
  public void onFailure(Throwable t) {
   Log.e("Upload", t.toString());
  }
 });

}

4.服务器段代码:
服务器用的是struts接收:

@Controller 
public class GetToken extends ActionSupport { 
  
/** 
  * 
  */ 
 private static final long serialVersionUID = 1L; 
 private File[] file; 
 private String[] fileName; 
 public File[] getFile() { 
  return file; 
 } 
 public void setFile(File[] file) { 
  this.file = file; 
 } 
 public String[] getFileName() { 
  return fileName; 
 } 
 public void setFileName(String[] fileName) { 
  this.fileName = fileName; 
 } 
 
 @Action("/upload") 
 public void login() { 
  System.out.println("------"+Arrays.toString(file)); 
  System.out.println("------"+Arrays.toString(fileName)); 
 } 
  
  
  
} 

以上就是本文的全部内容,希望对大家的学习有所帮助。


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