SocketChat通信

MainActivity

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;

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

/**
 * 客户端
 */
public class MainActivity extends AppCompatActivity {
    private OutputStream outputStream;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        connectServerWithTCPSocket();


    }
    //发送消息
    public void sendMsg(){
        // 把数据写入到OuputStream对象中
        try {
            outputStream.write("客户端数据".getBytes());
            // 发送读取的数据到服务端
            outputStream.flush();
        } catch (IOException e) {
            e.printStackTrace();
        }


    }

    protected void connectServerWithTCPSocket() {
        new Thread(){
            @Override
            public void run() {
                super.run();
                Socket socket;
                try {// 创建一个Socket对象，并指定服务端的IP及端口号
                    socket = new Socket("192.168.191.2", 1989);
                    // 获取Socket的OutputStream对象用于发送数据。
                    outputStream = socket.getOutputStream();

                } catch (UnknownHostException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }

            }
        }.start();



    }

    public void onClick(View view) {
        //发送消息给服务端
        sendMsg();
    }
}

activity_main布局

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="alice.bw.com.socketclient.MainActivity">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="onClick"
        android:text="这里是客户端"/>
</RelativeLayout>