Retrofit实现图文上传至服务器

前言：现在大多数的项目中都涉及图片+文字上传了,下面请详见实现原理：

开发环境:androidstudio

1.引入依赖：

compile 'com.squareup.retrofit2:retrofit:2.1.0'  

2.网络权限：

<uses-permission android:name="android.permission.internet" />  


3.创建上传对象okhttpclient ：

private static final okhttpclient client = new okhttpclient.builder()
   .addinterceptor(new interceptor() {
    @override
    public response intercept(chain chain) throws ioexception {
     request request = chain
       .request()
       .newbuilder()
       .build();
     return chain.proceed(request);
    }
   })
   .readtimeout(10, timeunit.seconds)//设置读取超时时间
   .writetimeout(10, timeunit.seconds)//设置写的超时时间
   .connecttimeout(15, timeunit.seconds)//设置连接超时时间
   .build();

4.上传图片的公有方法：

private synchronized final static void uploadimgandparameter(map<string, object> map, string url,
   final uidatalistener listener) {
  // mimgurls为存放图片的url集合
  multipartbody.builder builder = new multipartbody.builder().settype(multipartbody.form);
  if (null != map) {
   for (map.entry<string, object> entry : map.entryset()) {
    if (entry.getvalue() != null) {
     if (entry.getvalue() instanceof file) {
      file f = (file) entry.getvalue();
      builder.addformdatapart(entry.getkey(), f.getname(), requestbody.create(media_type_png, f));
     } else {
      builder.addformdatapart(entry.getkey(), entry.getvalue().tostring());
     }
    }
   }
  }
  //创建requestbody
  requestbody body = builder.build();

//  multipartbody requestbody = builder.build();
  //构建request请求
  final request request = new request.builder()
    .url(url)//地址
    .post(body)//添加请求体
//    .post(requestbody)//添加请求体
    .build();
  client.newcall(request).enqueue(new okhttp3.callback() {
   @override
   public void onresponse(call call, final response response) throws ioexception {
    if (response.issuccessful()) {//判断是否成功
     final string data = response.body().string();//string()仅可调用一次。否则报illegalstateexception: closed异常
     log.i("file1", "上传照片成功-->" + data);
     onsuccess(listener, data);
     call.cancel();//上传成功取消请求释放内存
    }
   }
   @override
   public void onfailure(call call, final ioexception e) {
    log.i("file2", "上传失败-->" + e.getmessage());
    string msg = e.getmessage();
    if (msg == null || msg.equals("timeout")) {
     onerror(listener, "网络不稳定请求超时!");
    } else {
     onerror(listener, e.getmessage());
    }
    call.cancel();//上传失败取消请求释放内存
   }
  });
 }

//注意：添加手机图片，别忘了添加sd卡权限

5.全部代码：

public class httputil {
  private static final handler handler = new handler(looper.getmainlooper());
  private static final mediatype media_type_png = mediatype.parse("image/*");
  private static final okhttpclient client = new okhttpclient.builder()
      .addinterceptor(new interceptor() {
        @override
        public response intercept(chain chain) throws ioexception {
          request request = chain
              .request()
              .newbuilder()
              .build();
          return chain.proceed(request);
        }
      })
      .readtimeout(10, timeunit.seconds)//设置读取超时时间
      .writetimeout(10, timeunit.seconds)//设置写的超时时间
      .connecttimeout(15, timeunit.seconds)//设置连接超时时间
      .build();
  /**
   * 实例--》添加商品
   */
  public static void addcoupon( int shopperid,string shoppername,
                 file file, final uidatalistener listener) {
    string url = "shopappajx/shopappcouponaction_savecoupon.htm";
    map<string, object> map = new hashmap<>();
    map.put("shopperid", shopperid);
    map.put("shoppername", shoppername);
    map.put("couponimage", file);//商品图片
    uploadimgandparameter(map, url, listener);
  }
  //上传图片共有方法
  private synchronized final static void uploadimgandparameter(map<string, object> map, string url,
      final uidatalistener listener) {
    // mimgurls为存放图片的url集合
    multipartbody.builder builder = new multipartbody.builder().settype(multipartbody.form);
    if (null != map) {
      for (map.entry<string, object> entry : map.entryset()) {
        if (entry.getvalue() != null) {
          if (entry.getvalue() instanceof file) {
            file f = (file) entry.getvalue();
            builder.addformdatapart(entry.getkey(), f.getname(), requestbody.create(media_type_png, f));
          } else {
            builder.addformdatapart(entry.getkey(), entry.getvalue().tostring());
          }
        }
      }
    }
    //创建requestbody
    requestbody body = builder.build();

//    multipartbody requestbody = builder.build();
    //构建request请求
    final request request = new request.builder()
        .url(url)//地址
        .post(body)//添加请求体
//        .post(requestbody)//添加请求体
        .build();
    client.newcall(request).enqueue(new okhttp3.callback() {
      @override
      public void onresponse(call call, final response response) throws ioexception {
        if (response.issuccessful()) {//判断是否成功
          final string data = response.body().string();//string()仅可调用一次。否则报illegalstateexception: closed异常
          log.i("file1", "上传照片成功-->" + data);
          onsuccess(listener, data);
          call.cancel();//上传成功取消请求释放内存
        }
      }
      @override
      public void onfailure(call call, final ioexception e) {
        log.i("file2", "上传失败-->" + e.getmessage());
        string msg = e.getmessage();
        if (msg == null || msg.equals("timeout")) {
          onerror(listener, "网络不稳定请求超时!");
        } else {
          onerror(listener, e.getmessage());
        }
        call.cancel();//上传失败取消请求释放内存
      }
    });
  }
  private final static void onsuccess(final uidatalistener listener, final string data) {
    handler.post(new runnable() {
      public void run() {
        // 需要在主线程的操作。
        listener.onsuccess(data);
      }
    });
  }
  private final static void onerror(final uidatalistener listener, final string msg) {
    if (null != listener) {
      handler.post(new runnable() {
        public void run() {
          // 需要在主线程的操作。
          listener.onfailure(msg);
        }
      });
    }
  }
  public interface uidatalistener {
   //网络请求成功
    void onsuccess(string data);
   //网络请求失败
    void onfailure(string errormassage);
  }
}

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