我的客户端代码使我的 android 应用程序崩溃

My client code makes my android app crash

所以我有这个客户端代码,我在 Eclipse 测试过它在那里工作

try {
    // Establish connection
    Socket socket = new Socket(InetAddress.getByName("192.168.1.104"), 9000);

    // Request data
    OutputStream outputStream = socket.getOutputStream();
    InputStream inputStream = socket.getInputStream();

    msg = "IDGN:" + "1";
    System.out.println(msg);

    outputStream.write(msg.getBytes());
    socket.shutdownOutput();
    scanner = new DataInputStream(inputStream);
    restaurante = scanner.readUTF();
    System.out.println(restaurante);

    // Shut down socket
    socket.shutdownInput();
    socket.close();
} catch (IOException io) {
    io.printStackTrace();
}

但是当我尝试在 Android 应用程序中执行相同操作时它崩溃了

try {
    // Establish connection
    Socket socket = new Socket(InetAddress.getByName("192.168.1.104"), 9000);

    // Request data
    OutputStream outputStream = socket.getOutputStream();
    InputStream inputStream = socket.getInputStream();

    msg = "IDGN:" + "1";
    outputStream.write(msg.getBytes());
    socket.shutdownOutput();

    scanner = new DataInputStream(inputStream);
    restaurante = scanner.readUTF();

    View b = findViewById(R.id.texto);
    b.setVisibility(View.VISIBLE);
    String ss = "Valore el servicio recibido en: " + restaurante;
    ((TextView) b).setText(ss);

    // Shut down socket
    socket.shutdownInput();
    socket.close();
} catch (IOException io) {
    io.printStackTrace();
}

我只是不知道为什么,我试图让它等待数据准备好,将其更改为 OutputStream 并从扫描仪读取一行,直接从中读取字节OutputStream.

服务器似乎在两种情况下(Android 和 Eclipse)都能正常接收数据并发送正确的答案。

完成后关闭或刷新输出流。我认为它导致应用内存泄漏

您不能在同一线程中同时进行网络 I/O 和 UI 操作,例如 TextView#setText()。尝试在 UI 线程上执行网络 I/O 会导致 NetworkOnMainThreadException。尝试在非 UI 线程上执行 UI 操作会导致 CalledFromWrongThreadException。我猜你的代码在其中之一上崩溃了。

有一些高级线程机制,例如 rxjava 调度程序或 kotlin 协程。在不添加额外的库依赖项的情况下,您可以尝试将网络代码移动到 AsyncTask.

另请参阅:

How do I fix android.os.NetworkOnMainThreadException?

Unfortunately MyApp has stopped. How can I solve this?