Android端使用retrofit上传多张图片，后端使用Php接收图片(包含前后端代码)

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。

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代码资源下载

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超级简单的Android Studio jni 实现(无需命令行)