个人练习代码库/Socket/聊天客户端

 MainAc

import android.content.Intent;
import android.os.Build;
import android.os.Handler;
import android.os.Message;
import android.os.SystemClock;
import android.support.annotation.RequiresApi;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Scroller;
import android.widget.TextView;

import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.Socket;
import java.text.SimpleDateFormat;
import java.util.Date;


public class MainActivity extends AppCompatActivity {
    private static final int MESSAGE_RECEIVE_NEW_MSG=1;
    private static final  int MESSAGE_SOCKET_CONNECTED=2;
    private static final String TAG="TCPAc";

    private TextView tv;
    private EditText et;
    private Button button;
    private PrintWriter printWriter;
    private Socket clientSocket;

    private  Handler mHandler=new Handler(new Handler.Callback() {
        @Override
        public boolean handleMessage(Message msg) {
            switch (msg.what){
                case MESSAGE_RECEIVE_NEW_MSG:
                    tv.setText(tv.getText()+(String)msg.obj);
                    break;
                case MESSAGE_SOCKET_CONNECTED:
                    button.setEnabled(true);
                    break;
                default:
                    break;
            }
            return false;
        }
    });
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button=findViewById(R.id.button);
        et=findViewById(R.id.editText);
        tv=findViewById(R.id.text);
        Intent intent=new Intent(MainActivity.this,MyService.class);
        startService(intent);
        new Thread(new Runnable() {
            @Override
            public void run() {
                connectTCPService();
            }
        }).start();

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final String etText=et.getText().toString();
                if (!etText.isEmpty()&&printWriter!=null) {
                    new Thread(new Runnable() {
                        @Override
                        public void run() {
                            printWriter.println(etText);
                        }
                    }).start();
                    et.setText("");
                    String time = SimpleDateFormat.getTimeInstance().format(System.currentTimeMillis());
                    final String showedMsg = "self" + time + ":" + etText + "\n";
                    tv.setText(tv.getText() + showedMsg);
                }
            }
        });
    }

    @Override
    protected void onDestroy() {
        if (clientSocket!=null){
            try {
                clientSocket.shutdownInput();
                clientSocket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
        super.onDestroy();
    }

    private void connectTCPService() {
        Socket socket=null;
        while (socket==null){
            try {
                socket=new Socket("localhost",8688);
                clientSocket=socket;
                printWriter=new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())),true);
                mHandler.sendEmptyMessage(MESSAGE_SOCKET_CONNECTED);
                Log.e(TAG,"success");
            } catch (IOException e) {
                SystemClock.sleep(1000);
                Log.e(TAG,"failed");
            }
        }


        //接收服务端的消息
        try {

                BufferedReader bufferedReader=new BufferedReader(
                        new InputStreamReader(socket.getInputStream()));
                while (!MainActivity.this.isFinishing()){
                    String str=bufferedReader.readLine();
                    if (str!=null){
                        String time=SimpleDateFormat.getTimeInstance().format(System.currentTimeMillis());
                        final  String showedMsg="server"+time+":"+str+"\n";
                        Message message=new Message();
                        message.what=MESSAGE_RECEIVE_NEW_MSG;
                        message.obj=showedMsg;
                        mHandler.sendMessage(message);
                    }
                }
                socket.close();
                bufferedReader.close();
                printWriter.close();



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


    }

}

MyService

import android.app.IntentService;
import android.app.Service;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.os.IBinder;
import android.support.annotation.Nullable;
import android.util.Log;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Random;

public class MyService extends IntentService {
    public MyService() {
        super("MyService");
    }

    private static final String TAG = "MyService";

    private Boolean mIsServiceDestroy = false;
    private String[] mDefinedMessages = new String[]{
            "你好啊，哈哈", "请问你叫什么名字啊?", "今天天气不错",
            "你知道吗，我可以同时和多个人聊天", "给你讲个笑话吧，你会发财"
    };


    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    protected void onHandleIntent(@Nullable Intent intent) {
        ServerSocket serverSocket = null;

        try {
            //监听本体8688端口
            serverSocket = new ServerSocket(8688);
        } catch (IOException e) {
            e.printStackTrace();
            Log.e(TAG, "failed");
        }

        while (!mIsServiceDestroy) {
            try {
                //获取接收客户端信息
                if (serverSocket != null) {
                    final Socket socket = serverSocket.accept();
                    new Thread(new Runnable() {
                        @Override
                        public void run() {
                            try {
                                responseClient(socket);
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                        }
                    }).start();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }



    private void responseClient(Socket socket) throws IOException{
        //用于接收客户端消息
        BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(socket.getInputStream()));

        //用于给客户端发送消息
        PrintWriter printWriter=new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()) ),true);

        printWriter.println("欢迎来到聊天室");

        while (!mIsServiceDestroy){
            String str=bufferedReader.readLine();
            Log.d(TAG,"message from client"+str);
            if (str==null){
                //客户端断开连接
                break;
            }
            int i=new Random().nextInt(mDefinedMessages.length);
            String msg=mDefinedMessages[i];
            printWriter.println(msg);
        }
        printWriter.close();
        bufferedReader.close();
        socket.close();
    }

    @Override
    public void onDestroy() {
        Log.e(TAG,"destroy");
        super.onDestroy();

    }
}

activitymain.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.yrc.socket.MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/text"/>

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/editText"
        android:layout_alignParentBottom="true"
        android:layout_toLeftOf="@+id/button"
        android:layout_toStartOf="@+id/button"
        android:hint="say you want say" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentRight="true"
        android:text="send"
        android:id="@+id/button" />

RelativeLayout>