如何实现App与服务器之间的通信源码？

Android客户端

import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class MainActivity extends Activity {
    private TextView textView;
    private EditText editText;
    private PrintWriter printWriter;
    private ExecutorService executorService = Executors.newSingleThreadExecutor();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView = findViewById(R.id.textView);
        editText = findViewById(R.id.editText);
        Button button = findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String message = editText.getText().toString();
                if (!message.isEmpty()) {
                    printWriter.println(message);
                    editText.setText("");
                }
            }
        });
        executorService.submit(new Runnable() {
            @Override
            public void run() {
                try {
                    Socket socket = new Socket("192.168.1.100", 9999); // 替换为服务器IP地址和端口号
                    printWriter = new PrintWriter(socket.getOutputStream(), true);
                    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                    while (!Thread.currentThread().isInterrupted()) {
                        String line = bufferedReader.readLine();
                        if (line != null) {
                            final String finalLine = line;
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    textView.append(finalLine + "
");
                                }
                            });
                        }
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }
}

服务器端代码

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
public class Server {
    public static void main(String[] args) {
        try {
            ServerSocket serverSocket = new ServerSocket(9999); // 端口号与客户端保持一致
            System.out.println("服务器已启动，等待连接...");
            while (true) {
                Socket socket = serverSocket.accept();
                System.out.println("客户端已连接：" + socket);
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        try {
                            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                            PrintWriter printWriter = new PrintWriter(socket.getOutputStream(), true);
                            String line;
                            while ((line = bufferedReader.readLine()) != null) {
                                System.out.println("收到消息：" + line);
                                printWriter.println("服务器已收到：" + line); // 回显消息给客户端
                            }
                        } catch (Exception e) {
                            e.printStackTrace();
                        } finally {
                            try {
                                socket.close();
                            } catch (Exception e) {
                                e.printStackTrace();
                            }
                        }
                    }
                }).start();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

代码展示了一个简单的Android客户端与Java服务器端的TCP Socket通信示例，客户端可以发送消息到服务器，服务器接收后回显消息给客户端，实际项目中需要根据具体需求进行修改和完善，例如添加错误处理、优化性能等。

到此，以上就是小编对于“app和服务器通信源码”的问题就介绍到这了，希望介绍的几点解答对大家有用，有任何问题和不懂的，欢迎各位朋友在评论区讨论，给我留言。