Android Socket通信编程
2024-08-23 15:33:00
安卓客户端通过socket与服务器端通讯一般可以按照以下几个步骤：
（1）.通过IP地址和端口实例化Socket，请求连接服务器：
socket = new Socket(HOST, PORT); //host:为服务器的IP地址 port：为服务器的端口号
（2）.获取Socket流以进行读写，并把流包装进BufferWriter或者PrintWriter：
PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(socket.getOutputStream())),true);
这里涉及了三个类：socket.getOutputStream得到socket的输出字节流，OutputStreamWriter是字节流向字符流转换的桥梁，BufferWriter是字符流，然后再包装进PrintWriter。
（3）对Socket进行读写
if (socket.isConnected()) {
if (!socket.isOutputShutdown()) {
out.println(msg);
}
}
（4）关闭打开的流，一定要注意对socket输入流/输出流的关闭.
out.close();
main.xml中的参考代码：
<?xml version=＂1.0＂ encoding=＂utf-8＂?> <LinearLayout xmlns:android=http://schemas.android.com/apk/res/android android:orientation=＂vertical＂ android:layout_width=＂fill_parent＂ android:layout_height=＂fill_parent＂> <TextView android:id=＂@+id/TextView＂ android:singleLine=＂false＂ android:layout_width=＂fill_parent＂ android:layout_height=＂wrap_content＂ /> <EditText android:hint=＂content＂ android:id=＂@+id/EditText01＂ android:layout_width=＂fill_parent＂ android:layout_height=＂wrap_content＂> </EditText> <Button android:text=＂send＂ android:id=＂@+id/Button01＂ android:layout_width=＂fill_parent＂ android:layout_height=＂wrap_content＂> </Button> </LinearLayout>
安卓客户端的源代码：
public class SocketDemo extends Activity implements Runnable {
private TextView tv_msg = null;
private EditText ed_msg = null;
private Button btn_send = null;
private static final String HOST = ＂192.168.1.150＂;
private static final int PORT = 9999;
private Socket socket = null;
private BufferedReader in = null;
private PrintWriter out = null;
private String content = ＂＂;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tv_msg = (TextView) findViewById(R.id.TextView);
ed_msg = (EditText) findViewById(R.id.EditText01);
btn_send = (Button) findViewById(R.id.Button01);
try {
socket = new Socket(HOST, PORT);
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(
socket.getOutputStream())), true);
} catch (IOException ex) {
ex.printStackTrace();
ShowDialog(＂login exception＂ + ex.getMessage());
}
btn_send.setOnClickListener(new Button.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String msg = ed_msg.getText().toString();
if (socket.isConnected()) {
if (!socket.isOutputShutdown()) {
out.println(msg);
}
}
}
});
new Thread(SocketDemo.this).start();
}
public void ShowDialog(String msg) {
new AlertDialog.Builder(this).setTitle(＂notification＂).setMessage(msg)
.setPositiveButton(＂ok＂, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
}).show();
}
public void run() {
try {
while (true) {
if (socket.isConnected()) {
if (!socket.isInputShutdown()) {
if ((content = in.readLine()) != null) {
content += ＂\n＂;
mHandler.sendMessage(mHandler.obtainMessage());
} else {
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
public Handler mHandler = new Handler() {
public void handleMessage(Message msg) {
super.handleMessage(msg);
tv_msg.setText(tv_msg.getText().toString() + content);
}
};
}
服务器端得java代码：
public class Main {
private static final int PORT = 9999;
private List<Socket> mList = new ArrayList<Socket>();
private ServerSocket server = null;
private ExecutorService mExecutorService = null; //线程池
public static void main(String[] args) {
new Main();
}
public Main() {
try {
server = new ServerSocket(PORT);
mExecutorService = Executors.newCachedThreadPool(); //创建一个线程池
System.out.print(＂server start ...＂);
Socket client = null;
while(true) {
client = server.accept();
mList.add(client);
mExecutorService.execute(new Service(client)); //启动一个新线程来处理连接
}
}catch (Exception e) {
e.printStackTrace();
}
}
class Service implements Runnable {
private Socket socket;
private BufferedReader in = null;
private String msg = ＂＂;
public Service(Socket socket) {
this.socket = socket;
try {
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
msg = ＂user＂ +this.socket.getInetAddress() + ＂come toal:＂
+mList.size();
this.sendmsg();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void run() {
// TODO Auto-generated method stub
try {
while(true) {
if((msg = in.readLine())!= null) {
if(msg.equals(＂exit＂)) {
System.out.println(＂ssssssss＂);
mList.remove(socket);
in.close();
msg = ＂user:＂ + socket.getInetAddress()
+ ＂exit total:＂ + mList.size();
socket.close();
this.sendmsg();
break;
} else {
msg = socket.getInetAddress() + ＂:＂ + msg;
this.sendmsg();
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
public void sendmsg() {
System.out.println(msg);
int num =mList.size();
for (int i = 0; i < num; i++) {
Socket mSocket = mList.get(index);
PrintWriter pout = null;
try {
pout = new PrintWriter(new BufferedWriter(
new OutputStreamWriter(mSocket.getOutputStream())),true);
pout.println(msg);
}catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
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