android 进程间通信之socket

• 使用BuffredReader ，readline获得服务器发过来的消息时，服务器发送应该采用write(msg+"\n") 然后flush;或者用PrinterWrite autoflush设置为true，然后println进行发送
• 

   

 

public class TcpServerService extends Service {

    private static final String TAG = "TcpServerService";
    ServerSocket serverSocket;
    private String[] mDefinedMessages = new String[]{
            "你好啊，哈哈",
            "今天北京天气不错啊，shy",
            "你知道吗，我可是可以和多个人聊天的哦！！",
            "家附近哦发来句欧文！！"
    };
    BlockingDeque blockingDeque = new LinkedBlockingDeque();
    private PrintWriter printWriter;
    private ExecutorService executorService = new ThreadPoolExecutor(3,3,2000, TimeUnit.MICROSECONDS,
            blockingDeque);
    private boolean mIsServiceDestroyed = false;

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

    @Override
    public void onCreate() {
        super.onCreate();
        executorService.submit(new TcpServer());
    }

    class TcpServer implements Runnable{
        @Override
        public void run() {
            try {
                /**
                 * 绑定本地端口
                 */
                serverSocket= new ServerSocket(1025);

                while (!mIsServiceDestroyed){
                    final Socket socket = serverSocket.accept();
                    Log.i(TAG, "run: accept");
                    executorService.submit(new Runnable() {
                        @Override
                        public void run() {
                            try {
                                responseClient(socket);
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                        }
                    });
                }
            } catch (IOException e) {
                e.printStackTrace();
            }finally {

            }
        }
    }

    private void responseClient(Socket socket) throws IOException{
        BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
//        printWriter =new PrintWriter( new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())),true);
        Log.i(TAG, "欢迎来到聊天室");
        while (!mIsServiceDestroyed){
            String str = in.readLine();
            Log.i(TAG, "Message from Client:"+str);
            if (str == null){
                Log.i(TAG, " 客户端断开连接");
                break;
            }
            int i = new Random().nextInt(mDefinedMessages.length);
            String msg =mDefinedMessages[i];
//            printWriter.println(msg);
            writer.write(msg+"\n");
            writer.flush();
            Log.i(TAG, "send message:"+msg);
        }
        Log.i(TAG, "Client quit");
        in.close();
        writer.close();
        socket.close();
        serverSocket.close();


    }

　　

package com.lzw.cha01.myapplication.chapter2.tcp;

import android.content.Intent;
import android.os.Bundle;
import android.os.SystemClock;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.lzw.cha01.myapplication.R;

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;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * MyApplication
 * Created by lzw on 2019/3/13. 13:25:47
 * 邮箱：632393724@qq.com
 * All Rights Saved! Chongqing AnYun Tech co. LTD
 */
public class SocketClientActivity extends AppCompatActivity {

    private static final String TAG = SocketClientActivity.class.getSimpleName();
    private TextView content ;
    private EditText et_send_conent;
    private Button btn_send;
    private Intent intent;

    private Socket socket;
    private PrintWriter mPrintWriter;
    private ExecutorService executorService = Executors.newCachedThreadPool();

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout_socket_client);
        intent = new Intent(this,TcpServerService.class);
        startService(intent);
        connectToServer();
        initView();
    }

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

        }
        stopService(intent);
    }

    private void connectToServer() {
        executorService.submit(new connectRunnable());
    }
    class connectRunnable implements Runnable{
        @Override
        public void run() {

            while(socket == null){
                try {
                    socket = new Socket("localhost",1025);
                    mPrintWriter = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())),true);


                } catch (IOException e) {
                    e.printStackTrace();
                    SystemClock.sleep(1000);
                }


            }
            try {
                BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                while (!SocketClientActivity.this.isFinishing()){
                    final String str = reader.readLine();
                    Log.i(TAG, "Message from server:"+str);
                    if (!TextUtils.isEmpty(str)){
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                content.setText(content.getText() + "\n" + getCurrentTime() + "\n" + "服务端：" + str);
                            }
                        });
                    }
                }
                mPrintWriter.close();
                reader.close();
                socket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    private void initView() {

        content = findViewById(R.id.tv_content);
        et_send_conent = findViewById(R.id.et_send);
        btn_send = findViewById(R.id.btn_send);

        btn_send.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final String sendStr = et_send_conent.getText().toString().trim();
                if (TextUtils.isEmpty(sendStr)){
                    Toast.makeText(SocketClientActivity.this, "发送内容不能为空", Toast.LENGTH_SHORT).show();
                    return;
                }
                if (socket == null || mPrintWriter==null){
                    Toast.makeText(SocketClientActivity.this, "网络不给力", Toast.LENGTH_SHORT).show();
                    return;
                }
                Log.i(TAG, "onClick: ");
                executorService.submit(new Runnable() {
                    @Override
                    public void run() {
                        mPrintWriter.println(sendStr);
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                content.setText(content.getText()+"\n"+getCurrentTime()+"\n"+"客户端："+sendStr);
                                et_send_conent.setText("");
                            }
                        });
                    }
                });


            }
        });
    }


    private String getCurrentTime() {
        //设置日期格式
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        // new Date()为获取当前系统时间
        return df.format(new Date());
    }
}