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我已经创建了一个客户端 - 服务器应用程序,双方使用套接字连接和输入/输出流来发送/接收数据。这一切都很好,但只有我只有一个使用连接的活动。由于我将在应用程序中进行的活动不止一次,并且经过一番搜索后,我得出结论,我必须创建一个服务来处理套接字连接以及从套接字流发送/接收数据。我以前从来没有和服务合作过,我想我一次只能开始一步。目前,我刚刚创建了一个服务,该服务创建了我的Client类(它扩展了Thread)的一个实例,并启动该线程,该线程建立了与服务器的连接。
我的客户类
T_Client:使用服务通过套接字连接发送/接收数据。
public class T_Client extends Thread {
private static final String TAG = "T_Client";
private static String serverIP = "192.168.2.3";
private static int port = 4444;
private InetAddress serverAddr = null;
private Socket sock = null;
private boolean running = false;
private ObjectInputStream in;
private ObjectOutputStream out;
private Object objIn;
public void send(MessageCustom _msg) {
if (out != null) {
try {
out.writeObject(_msg);
out.flush();
Log.i("Send Method", "Outgoing : " + _msg.toString());
} catch (IOException ex) {
Log.e("Send Method", ex.toString());
}
}
}
public void stopClient() {
Log.v(TAG,"stopClient method run");
running = false;
}
@Override
public void run() {
running = true;
try {
serverAddr = InetAddress.getByName(serverIP);
Log.i("TCP Client", "C: Connecting...");
sock = new Socket(serverAddr, port);
try {
out = new ObjectOutputStream(sock.getOutputStream());
in = new ObjectInputStream(sock.getInputStream());
Log.i(TAG, "C: Connected.");
while (running) {
objIn = in.readObject();
Log.i("Object Read Class", objIn.getClass().toString());
Log.i("Object Read", objIn.toString());
}
Log.e("RESPONSE FROM SERVER", "S: Received Message: '" + objIn + "'");
} catch (Exception e) {
Log.e(TAG, "S: Error", e);
} finally {
out.close();
in.close();
sock.close();
Log.i(TAG, "Closing socket: " + sock);
}
} catch (Exception e) {
Log.e(TAG, "C: Error", e);
}
}
}
我的服务类
为MyService:
public class MyService extends Service {
private static final String TAG = "MyService";
private T_Client client;
@Override
public void onDestroy() {
Log.v(TAG, "onDestroy");
if (client != null) {
try {
client.stopClient();
} catch (Exception e) {
Log.e(TAG, "Error on close: " + e);
}
}
super.onDestroy();
Toast.makeText(this, "Service stopped", Toast.LENGTH_LONG).show();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.v(TAG, "onStartCommand");
client = new T_Client();
client.start();
Toast.makeText(this, "Service started", Toast.LENGTH_LONG).show();
return START_STICKY;
}
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
}
所有我在我的主要活动在此刻做的是使用一个起点和一个停止按钮开始/停止服务
public void start(View v){
Log.i(TAG,"Start pressed");
Intent intent=new Intent(getBaseContext(),MyService.class);
startService(intent);
}
public void stop(View v){
Log.i(TAG,"Stop pressed");
Intent intent=new Intent(getBaseContext(),MyService.class);
stopService(intent);
}
所以我的问题是:
- 我有什么做用我的服务送东西?
- 如何处理我从服务器读取的对象,以便我可以让应用程序实时知道已收到某些内容?
任何可以指导我解决我的问题的输入是非常感谢。
预先感谢您。