安卓通信代码

安卓通信代码需要根据具体场景和需求进行编写，下面是一个简单的安卓Socket通信的示例代码：

public class ClientActivity extends Activity {
    private EditText etIp, etPort, etSend;
    private Button btnSend;
    private TextView tvRecv;
    private Socket socket;
    private OutputStream outputStream;
    private InputStream inputStream;
    private byte[] buffer = new byte[1024];
    private int len;

    private Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what) {
                case 0:
                    String recvStr = (String) msg.obj;
                    tvRecv.setText("收到：" + recvStr);
                    break;
            }
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_client);

        etIp = (EditText) findViewById(R.id.et_ip);
        etPort = (EditText) findViewById(R.id.et_port);
        etSend = (EditText) findViewById(R.id.et_send);
        btnSend = (Button) findViewById(R.id.btn_send);
        tvRecv = (TextView) findViewById(R.id.tv_recv);

        btnSend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        try {
                            String ip = etIp.getText().toString().trim();
                            int port = Integer.parseInt(etPort.getText().toString().trim());
                            String sendStr = etSend.getText().toString().trim();

                            socket = new Socket(ip, port);
                            outputStream = socket.getOutputStream();
                            inputStream = socket.getInputStream();

                            outputStream.write(sendStr.getBytes());
                            outputStream.flush();

                            len = inputStream.read(buffer);
                            String recvStr = new String(buffer, 0, len);
                            Message msg = handler.obtainMessage();
                            msg.what = 0;
                            msg.obj = recvStr;
                            handler.sendMessage(msg);

                            outputStream.close();
                            inputStream.close();
                            socket.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                }).start();
            }
        });
    }
}

这段代码实现了一个简单的安卓Socket通信的功能，通过输入对方的IP地址和端口号，发送一段字符串，接收对方返回的数据并在界面上显示。需要注意的是，这段代码只是一个示例，实际应用中还需要进行异常处理和线程安全等方面的优化。