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我想从服务器下载多个图像。我打开套接字并下载第一个图像，当我想在这个套接字中下载第二个图像时，下载不继续，套接字关闭。我的代码如下...

公共类 ClientThread 实现 Runnable {

    public void run() {
        try {
            Log.d("ClientActivity", "C: Connecting...");
            SocketAddress sockaddr = new InetSocketAddress(serverIpAddress, SERVERPORT);
            socket = new Socket();
            socket.setKeepAlive(true);
            socket.connect(sockaddr, 5000);
            if (socket.isConnected()) {
                final DataInputStream input = new DataInputStream(socket.getInputStream());
                final PrintWriter output = new PrintWriter(new OutputStreamWriter(socket.getOutputStream()));

                output.println("GET /way/images/profile/1231 HTTP/1.1");
                output.println("Host: 192.168.1.2");
                output.println("User-Agent: Java");
                output.println("Accept: */*");
                output.println("Connection: Keep-Alive");
                output.println("");
                output.flush();

                String line;
                File file = new File("/sdcard/aaa.png");
                if (!file.exists()) {
                    file.createNewFile();
                }
                FileOutputStream fileOut = new FileOutputStream(file);
                System.out.println("Getting first file");
                while ( (line = input.readLine()) != null ) {
                    System.out.println(line);
                    fileOut.write(line.getBytes());
                }
                System.out.println("First file finished");
                fileOut.flush();
                fileOut.close();

                output.println("GET /way/images/profile/1231 HTTP/1.1");
                output.println("Host: 192.168.1.2");
                output.println("User-Agent: Java");
                output.println("Accept: */*");
                output.println("Connection: Keep-Alive");
                output.println("");
                output.flush();

                file = new File("/sdcard/aaa1.png");
                if (!file.exists()) {
                    file.createNewFile();
                }
                fileOut = new FileOutputStream(file);
                System.out.println("Getting second file");
                while ( (line = input.readLine()) != null ) {
                    System.out.println(line);
                    fileOut.write(line.getBytes());
                }
                System.out.println("Second file finished");

                fileOut.flush();
                fileOut.close();
                input.close();
                output.close();
                socket.close();
            }
            Log.d("ClientActivity", "C: Closed.");
        } catch (Exception e) {
            Log.e("ClientActivity", "C: Error", e);
            connected = false;
        }
    }
}
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1 回答 1

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您似乎正在使用 HTTP 下载图像文件，在这种情况下，使用HttpURLConnection.

HttpURLConnection可以在这篇博文中找到用于下载图像的代码示例：在 Android 中下载图像

您还可以在 Android 开发者博客中阅读有关Android 的 HTTP 客户端的信息。

于 2012-05-14T10:59:33.133 回答