Question

我正在尝试上传服务器上的文件，并以这种方式显示每秒上传的字节数：

public void RunUploadTest () {
    try {
        URL url = new URL(serverLink);

        HttpURLConnection conn = (HttpURLConnection) url.openConnection();

        conn.setDoInput(true);
        conn.setDoOutput(true);
        conn.setUseCaches(false);
        conn.setRequestMethod("POST");
        conn.setRequestProperty("content-type", "video/mp4");

        for(int i =0; i<10; i++) {
            FileInputStream fis = new FileInputStream(myFileVideo);
            DataOutputStream dos = new DataOutputStream(conn.getOutputStream());
            int bytesWrite = 0;
            byte[] buffer = new byte[512];
            Stopwatch timer = new Stopwatch();
            int read;
            while ((read = fis.read(buffer)) != -1&& timer.elapsedTime()<1000) {
                dos.write(buffer, 0, read);
                dos.flush();
                bytesWrite++;
            }
            Log.d("Upload", "Bytes written: " + bytesWrite*512);
        }
        fis.close();

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

问题在于不计算我预期上传的字节数。你知道为什么不工作吗？

Answer 1

如果您写入的字节数相同10倍，则有2个选项：

您的文件写入时间不到1秒;
您的elapsedTime方法，以秒为单位返回（例如），而不是以毫秒为单位

你可能也不需要for循环，它会让你读取文件10次。

我会像这样重写你的代码：

public void RunUploadTest () {
    try {
        URL url = new URL(serverLink);

        HttpURLConnection conn = (HttpURLConnection) url.openConnection();

        conn.setDoInput(true);
        conn.setDoOutput(true);
        conn.setUseCaches(false);
        conn.setRequestMethod("POST");
        conn.setRequestProperty("content-type", "video/mp4");

        FileInputStream fis = new FileInputStream(myFileVideo);
        DataOutputStream dos = new DataOutputStream(conn.getOutputStream());
        int bytesWrite = 0;
        byte[] buffer = new byte[512];
        int read;
        while((read = fis.read(buffer))) {
            Stopwatch timer = new Stopwatch();
            while (timer.elapsedTime()<1) { //my guess here is that this method returns in seconds
                dos.write(buffer, 0, read);
                dos.flush();
                bytesWrite += read; //taken from Yoni Gross answer
            }
            Log.d("Upload", "Bytes written: " + bytesWrite);
        }
        fis.close();

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

每秒上传进度 - Android

1 个答案: