protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ipEditText = findViewById(R.id.ipEditText); portEditText = findViewById(R.id.portEditText); Button connectButton = findViewById(R.id.connectButton); connectButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String ip = ipEditText.getText().toString(); int port = Integer.parseInt(portEditText.getText().toString()); new Thread(new Runnable() { @Override public void run() { try { socket = new Socket(ip, port); in = new BufferedReader(new InputStreamReader(socket.getInputStream())); out = new PrintWriter(socket.getOutputStream(), true); // 获取SeekBar对象 SeekBar progressBar = findViewById(R.id.progressBar); // 添加OnSeekBarChangeListener监听器 progressBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { // 计算百分比对应的数字 int number = progress * 10; out.println(number); } @Override public void onStartTrackingTouch(SeekBar seekBar) {} @Override public void onStopTrackingTouch(SeekBar seekBar) {} }); } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }).start(); } }); Button sendMessageButton = findViewById(R.id.sendMessageButton); sendMessageButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { showSendMessageDialog(); } }); }主线程使用了网络操作导致堵塞，能帮我修改代码吗

可以使用 AsyncTask 或者 Handler 来解决主线程堵塞的问题，以下是使用 AsyncTask 的示例代码：

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ipEditText = findViewById(R.id.ipEditText);
    portEditText = findViewById(R.id.portEditText);
    Button connectButton = findViewById(R.id.connectButton);
    connectButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            String ip = ipEditText.getText().toString();
            int port = Integer.parseInt(portEditText.getText().toString());
            new ConnectTask().execute(ip, String.valueOf(port));
        }
    });
    Button sendMessageButton = findViewById(R.id.sendMessageButton);
    sendMessageButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            showSendMessageDialog();
        }
    });
}

private class ConnectTask extends AsyncTask<String, Void, Void> {
    @Override
    protected Void doInBackground(String... params) {
        String ip = params[0];
        int port = Integer.parseInt(params[1]);
        try {
            socket = new Socket(ip, port);
            in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            out = new PrintWriter(socket.getOutputStream(), true);
            // 获取SeekBar对象
            SeekBar progressBar = findViewById(R.id.progressBar);
            // 添加OnSeekBarChangeListener监听器
            progressBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
                @Override
                public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                    // 计算百分比对应的数字
                    int number = progress * 10;
                    out.println(number);
                }
                @Override
                public void onStartTrackingTouch(SeekBar seekBar) {}
                @Override
                public void onStopTrackingTouch(SeekBar seekBar) {}
            });
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
}

在这个示例代码中，我们使用 AsyncTask 来执行网络操作，避免了主线程的堵塞。在 ConnectTask 类的 doInBackground() 方法中，我们执行了连接服务器的操作，并初始化了 SeekBar 控件。需要注意的是，由于 doInBackground() 方法不能直接修改 UI 界面，因此我们需要在 onProgressUpdate() 或者 onPostExecute() 方法中更新 UI 界面。