Android端使用retrofit上传多张图片，后端使用Php

1.先列出Android端使用的library：

dependencies {
    ...
    compile 'com.jakewharton:butterknife:7.0.1'
    compile 'com.squareup:otto:1.3.5'
    compile 'cn.finalteam:galleryfinal:1.4.8.4'
    compile 'com.squareup.retrofit:retrofit:1.9.0'
    compile 'com.squareup.okhttp:okhttp-urlconnection:2.0.0'
    compile 'com.squareup.okhttp:okhttp:2.0.0'
    compile 'com.github.bumptech.glide:glide:3.6.1'
    compile 'com.jcodecraeer:xrecyclerview:1.2.6'
    compile 'com.baoyz.actionsheet:library:1.1.5'
    compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'
    compile 'io.reactivex:rxjava:1.0.6'
    compile 'io.reactivex:rxandroid:0.23.0'
    compile files('libs/fastjson-1.2.7.jar')
}

Android端代码：

public interface ApiService {
//  上传一个文件/图片
    @Multipart
    @POST("/UploadFileDemo/android_upload_file/upload.php")
    Observable<Response> uploadFile(@Part("uploadfile") TypedFile file);

//  上传多张图片
    @POST("/UploadFileDemo/android_upload_file/uploads.php")
    Observable<Response> uploadFiles(@Body MultipartTypedOutput multipartTypedOutput);
}

public class Client {

    public static String API_URL = Constant.API_URL;

    public static ExecutorService mExecutorService;

    private static ApiService instance;

    public static ApiService getServiceClient() {
        if (instance == null) {
            synchronized (Client.class) {
                if (instance == null) {
                    OkHttpClient okHttpClient = new OkHttpClient();
                    okHttpClient.setCookieHandler(new MyCookieManager());
                    okHttpClient.setReadTimeout(100, TimeUnit.SECONDS);
                    okHttpClient.setConnectTimeout(100, TimeUnit.SECONDS);

                    RestAdapter.Builder restAdapter = new RestAdapter.Builder();

                    restAdapter.setRequestInterceptor(new ApiHeaders());
                    restAdapter.setEndpoint(API_URL);
                    restAdapter.setClient(new OkClient(okHttpClient));
                    restAdapter.setLogLevel(RestAdapter.LogLevel.FULL);

                    mExecutorService = Executors.newCachedThreadPool();
                    instance = restAdapter.build().create(ApiService.class);
                }
            }
        }
        return instance;
    }

    public static void stopAll() {
        List<Runnable> pendingAndOngoing = mExecutorService.shutdownNow();
    }

    static class MyCookieManager extends CookieManager {
        @Override
        public void put(URI uri, Map<String, List<String>> stringListMap) throws IOException {
            super.put(uri, stringListMap);
            if (stringListMap != null && stringListMap.get("Set-Cookie") != null)
                for (String string : stringListMap.get("Set-Cookie")) {
                    String cookieValue = string.substring(0, string.indexOf("\"; ") + 1);
                    if (string.contains("A2=\"")) {
                        //保存到应用
                    }
                    if (string.contains("PB3_SESSION=\"")) {
                        ////保存到应用
                    }
                }
        }
    }

    static class ApiHeaders implements RequestInterceptor {
        @Override
        public void intercept(RequestFacade request) {
            request.addHeader("User-Agent", "Mozilla/5.0 (Linux; U; Android 4.1.1; zh-cn; HTC One X - 4.1.1 - API 16 - 720x1280 Build/JRO03S) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30");
            request.addHeader("Accept", "*/*");
            request.addHeader("Accept-Language", "zh-cn,zh");
        }
    }

}

上传关键代码：

//使用MultipartTypedOutput类来上传多张图片
 public void uploadFiles(List<String> paths) {
        MultipartTypedOutput multipartTypedOutput = new MultipartTypedOutput();
        for (String imgPath : paths){
        //注意“uploadfile[]”一定要带“[]”,表明上传的是数组，也就是多张图片,不能写“uploadfile”
            multipartTypedOutput.addPart("uploadfile[]", new TypedFile("", new File(imgPath)));
        }
        mApi.uploadFiles(multipartTypedOutput)
                .subscribeOn(Schedulers.computation())
                .subscribe(response -> handleUploadFile(response), error -> handleFailure(error));
    }
    
 private void handleUploadFile(Response response) {

    System.out.println(response.getUrl());
    try {
        InputStream in = response.getBody().in();
        String responseString = inputStream2String(in);
        Log.i("AAA", responseString);
        //解析json数据

        //otto事件传递
        mBus.post(responseString);


    } catch (IOException e) {
        e.printStackTrace();
    }

}

//接收事件代码
 @Subscribe //需要注解@Subscribe ,表明在这个函数接收数据
public void uploadFileResponse(String response) {
    Message msg = JSON.parseObject(response, Message.class);
    List<String> imgUrls = msg.getImgUrls();
    if (msg.getCode() == 1) {
        if (choosePhotoListAdapter == null) {
            choosePhotoListAdapter = new ChoosePhotoListAdapter(this, null, imgUrls);
            lvPhotoShow.setAdapter(choosePhotoListAdapter);
        }
        choosePhotoListAdapter.notifyDataSetChanged();
    }
}

Php端代码：

//初学php，写的比较简单，不太健壮，像图片是否已经上传过，都没有判断，大家自己补充啊^_^

<?php
/**
 * Created by PhpStorm.
 * User: zhangyipeng
 * Date: 16/2/18
 * Time: 下午3:48
 */

$base_path = "./upload_file/"; //接收文件目录
$imgs = array();  //定义一个数组存放上传图片的路径
$isSave = false;
if (!file_exists($base_path)) {
    mkdir($base_path);
}

foreach ($_FILES["uploadfile"]["error"] as $key => $error) {
    if ($error == UPLOAD_ERR_OK) {
        $tmp_name = $_FILES["uploadfile"]["tmp_name"][$key];
        $name = $_FILES["uploadfile"]["name"][$key];
        $uploadfile = $base_path . $name;
        $isSave = move_uploaded_file($tmp_name, $uploadfile);
        if ($isSave){
            $imgs[]=$uploadfile;
        }
    }
}

if ($isSave) {
    $array = array("code" => "1", "message" =>"上传图片成功"
    , "imgUrls" => $imgs);
    echo json_encode($array);
} else {
    $array = array("code" => "0", "message" => "上传图片失败," . $_FILES ['uploadfile'] ['error']
    , "imgUrls" => $imgs);
    echo json_encode($array);
}

其实上传成功的关键是part需要带uploadfile[] 。

multipartTypedOutput.addPart("uploadfile[]", new TypedFile("", new File(imgPath)));

我在这个地方失败了几十次，无意中看见html网页批量上传的name属性中带了[]，我就试了试，果然成功了。

代码资源下载

补充：php环境使用的是MAMP，文件所在目录如下，想要测试的可以看看