OKHttp实现多文件上传(干货)

      开发中有时有这么一个需求,要求对文件进行上传或下载,但是在上传或者下载前,你需要给用户一个友好的提示,在上传或者下载中,你需要将进度展示给用户,下载或者完成后提示用户下载完成。

这里给出服务器端(我用的jsp)和Android客户端的代码的github地址

JSP服务器端
https://github.com/zhouxu88/UploadFileWebDemo.git
Android客户端
https://github.com/zhouxu88/OkHttp3_UploadFile.git

一、多文件上传(不带进度)

生成RequestBody

 /**
     * 通过上传的文件的完整路径生成RequestBody
     * @param fileNames 完整的文件路径
     * @return
     */
    private static RequestBody getRequestBody(List<String> fileNames) {
        //创建MultipartBody.Builder,用于添加请求的数据
        MultipartBody.Builder builder = new MultipartBody.Builder();
        for (int i = 0; i < fileNames.size(); i++) { //对文件进行遍历
            File file = new File(fileNames.get(i)); //生成文件
            //根据文件的后缀名,获得文件类型
            String fileType = getMimeType(file.getName());
            builder.addFormDataPart( //给Builder添加上传的文件
                    "image",  //请求的名字
                    file.getName(), //文件的文字,服务器端用来解析的
                    RequestBody.create(MediaType.parse(fileType), file) //创建RequestBody,把上传的文件放入
            );
        }
        return builder.build(); //根据Builder创建请求
    }

生成Request


    /**
     * 获得Request实例
     * @param url
     * @param fileNames 完整的文件路径
     * @return
     */
    private static Request getRequest(String url, List<String> fileNames) {
        Request.Builder builder = new Request.Builder();
        builder.url(url)
                .post(getRequestBody(fileNames));
        return builder.build();
    }

上传文件


    /**
     * 根据url,发送异步Post请求
     * @param url 提交到服务器的地址
     * @param fileNames 完整的上传的文件的路径名           
     * @param callback OkHttp的回调接口
     */
public static void upLoadFile(String url,List<String> fileNames,Callback callback){
     OkHttpClient okHttpClient = new OkHttpClient();
     Call call = okHttpClient.newCall(getRequest(url,fileNames)) ;
     call.enqueue(callback);
}

二、多文件上传(带进度值)

由于对进度的处理,比较复杂,此处只做使用的介绍,具体的实现可在github上查看

1、对于进度已经封装成libary,直接调用即可
2、带进度的多文件上传的调用如下

MainActivity:(关键代码)


//提交文件到服务器的地址(使用的时候替换成自己的服务器地址)
    private static final String POST_FILE_URL = "http://192.168.1.3:8080/UploadFileDemo/MutilUploadServlet";

    private ProgressBar uploadProgress, downloadProgeress;
    private TextView uploadTV,downloadTv;

    //多文件上传(带进度)
    private void upload() {
        //这个是非ui线程回调,不可直接操作UI
        final ProgressListener progressListener = new ProgressListener() {
            @Override
            public void onProgress(long bytesWrite, long contentLength, boolean done) {
                Log.i("TAG", "bytesWrite:" + bytesWrite);
                Log.i("TAG", "contentLength" + contentLength);
                Log.i("TAG", (100 * bytesWrite) / contentLength + " % done ");
                Log.i("TAG", "done:" + done);
                Log.i("TAG", "================================");
            }
        };


        //这个是ui线程回调,可直接操作UI
        UIProgressListener uiProgressRequestListener = new UIProgressListener() {
            @Override
            public void onUIProgress(long bytesWrite, long contentLength, boolean done) {
                Log.i("TAG", "bytesWrite:" + bytesWrite);
                Log.i("TAG", "contentLength" + contentLength);
                Log.i("TAG", (100 * bytesWrite) / contentLength + " % done ");
                Log.i("TAG", "done:" + done);
                Log.i("TAG", "================================");
                //ui层回调,设置当前上传的进度值
                int progress = (int) ((100 * bytesWrite) / contentLength);
                uploadProgress.setProgress(progress);
                uploadTV.setText("上传进度值:" + progress + "%");
            }

            //上传开始
            @Override
            public void onUIStart(long bytesWrite, long contentLength, boolean done) {
                super.onUIStart(bytesWrite, contentLength, done);
                Toast.makeText(getApplicationContext(),"开始下载",Toast.LENGTH_SHORT).show();
            }

            //上传结束
            @Override
            public void onUIFinish(long bytesWrite, long contentLength, boolean done) {
                super.onUIFinish(bytesWrite, contentLength, done);
                //uploadProgress.setVisibility(View.GONE); //设置进度条不可见
                Toast.makeText(getApplicationContext(),"下载结束",Toast.LENGTH_SHORT).show();

            }
        };


        //开始Post请求
        OKHttpUtils.doPostRequest(POST_FILE_URL, initUploadFile(), uiProgressRequestListener, new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                Log.i("TAG", "error------> "+e.getMessage());
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                Log.i("TAG", "success---->"+response.body().string());
            }
        });


    //初始化上传文件的数据
    private List<String> initUploadFile(){
        List<String> fileNames = new ArrayList<>();
        fileNames.add(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
                + File.separator + "test.txt"); //txt文件
        fileNames.add(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
                + File.separator + "bell.png"); //图片
        fileNames.add(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES)
                + File.separator + "kobe.mp4"); //视频
        fileNames.add(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC)
                + File.separator + "xinnian.mp3"); //音乐
        return fileNames;
    }

    }

效果图

文件.PNG

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