Retrofit实现图文上传至服务器

2019-12-12 03:15:18

字体：大中小

来源：转载

供稿：网友

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);  }}

以上就是本文的全部内容，希望本文的内容对大家的学习或者工作能带来一定的帮助，同时也希望多多支持武林网！

上一篇：Android 开发订单流程view实例详解

下一篇：Android 实现IOS 滚轮选择控件的实例（源码下载）