Question

目前我正在尝试为我的Android设备创建一个小套接字应用程序。

我想通过套接字连接将大文件（~500MB）发送到我的笔记本电脑/ PC或其他任何东西。我在我的Android设备上使用套接字客户端连接到我的PC上的套接字服务器但是，当我尝试发送测试字段（~460MB）时，我的应用程序崩溃了，它说：

“抛出OutOfMemoryError”无法分配441616290字节分配4194304空闲字节和90MB直到OOM“”

我猜我的客户端无法处理此文件大小。所以我的问题是：有没有办法用TCP套接字连接来处理这些大文件？我的代码可以很好地处理小文件（例如5MB），但是文件较大时会失败。

这是我到目前为止所做的：

客户端在我的Android设备上运行：

private class Connecting extends AsyncTask<String, Integer, String>
{
    @Override
    protected String doInBackground(String... serverAdd) 
    {
        String filePath = "Path to file";

        File sdFile = new File(filePath);

        try {

            client = new Socket("ip", "port");

            outputStream = client.getOutputStream();                
            byte[] buffer = new byte[1024];
            FileInputStream in = new FileInputStream(sdFile);
            int rBytes;
            while((rBytes = in.read(buffer, 0, 1024)) != -1)
            {
              outputStream.write(buffer, 0, rBytes);
            }

            outputStream.flush();
            outputStream.close();
            client.close(); 


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

        return null;
    }
}

服务器端：

public class Main {

private static ServerSocket serverSocket;
private static Socket clientSocket;
private static InputStream inputStream;
private static FileOutputStream fileOutputStream;
private static BufferedOutputStream bufferedOutputStream;
private static int filesize = 10000000;
private static int bytesRead;
private static int current = 0;

public static void main(String[] args) throws IOException {

    serverSocket = new ServerSocket(10898);

    System.out.println("Server started. Listening to the port 10898");

    clientSocket = serverSocket.accept();

    byte[] mybytearray = new byte[filesize];   

    inputStream = clientSocket.getInputStream();
    fileOutputStream = new FileOutputStream("E:\\output.zip");
    bufferedOutputStream = new BufferedOutputStream(fileOutputStream);

    System.out.println("Receiving...");

    bytesRead = inputStream.read(mybytearray, 0, mybytearray.length);
    current = bytesRead;

    do {
        bytesRead = inputStream.read(mybytearray, current, (mybytearray.length - current));
        if (bytesRead >= 0) {
            current += bytesRead;
        }
    } while (bytesRead > -1);


    bufferedOutputStream.write(mybytearray, 0, current);
    bufferedOutputStream.flush();
    bufferedOutputStream.close();
    inputStream.close();
    clientSocket.close();
    serverSocket.close();

    System.out.println("Sever recieved the file");

}
}

格尔茨

[编辑]：客户代码。

Answer 1

以下是关于如何将文件分块的Java示例代码。您可以将此方法应用于TCP / IP客户端 - 服务器应用程序。有关分块的更多信息，请点击此处（Java - Read file by chunks?），我从中获取样本。

char[] myBuffer = new char[1024];
int bytesRead = 0;
BufferedReader in = new BufferedReader(new FileReader("foo.txt"));
while ((bytesRead = in.read(myBuffer, 0, 1024)) != -1)
{
    ...
}

Android通过socket发送大文件

1 个答案: