安卓使用TCP/Ip协议传输数据

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/qq_34379916/article/details/78661441

package com.example.testtcp;

import java.io.DataInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;
import java.net.UnknownHostException;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity {
	EditText editText;
	Button button;
	Socket socket;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		editText = findViewById(R.id.edit);
		button = findViewById(R.id.button);
		try {
			socket = new Socket("192.168.2.227", 2023);
			// 设置10秒之后即认为是超时
			socket.setSoTimeout(10000);
		} catch (Exception e) {
			e.printStackTrace();
		}
		button.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				new Thread(new Runnable() {
					@Override
					public void run() {
						Send(editText.getText().toString());
					}
				}).start();
			}
		});
	}

	private void Send(String s) {
		try {
			// 发送数据给服务端
			OutputStream outputStream = socket.getOutputStream();
			outputStream.write(s.getBytes("gb2312"));
			// socket.shutdownOutput();
			// 等待服务器发送数据，读取数据（超时异常）
			DataInputStream br = new DataInputStream(socket.getInputStream());
			byte[] b = new byte[1024];
			int length = br.read(b);
			String Msg = new String(b, 0, length, "gb2312");
			System.out.println(Msg + "    接收到服务器的数据");
		} catch (UnknownHostException e) {
			System.out.println("UnknownHost  来自服务器的数据");
			e.printStackTrace();
		} catch (IOException e) {
			System.out.println("IOException   来自服务器的数据");
			e.printStackTrace();
		}
	}

	@Override
	protected void onDestroy() {
		try {
			socket.shutdownOutput();
		} catch (IOException e) {
			e.printStackTrace();
		}
		super.onDestroy();
	}
}

由于要和别人的客控系统做对接，他们使用的是TCP协议，我发送，他返回，注意设置超时