我正在开发一个使用TCP / IP的Android应用程序。我可以轻松地向服务器发送消息给客户端,但我可以弄清楚如何从服务器向客户端发送消息。我环顾四周,找不到答案。它只是某种输出作者吗?
Public class MainActivity extends Activity {
private ServerSocket serverSocket;
Handler updateConversationHandler;
Thread serverThread = null;
private TextView text;
public static final int SERVERPORT = 6000;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
text = (TextView) findViewById(R.id.text2);
updateConversationHandler = new Handler();
this.serverThread = new Thread(new ServerThread());
this.serverThread.start();
}
@Override
protected void onStop() {
super.onStop();
try {
serverSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
class ServerThread implements Runnable {
public void run() {
Socket socket = null;
try {
serverSocket = new ServerSocket(SERVERPORT);
} catch (IOException e) {
e.printStackTrace();
}
while (!Thread.currentThread().isInterrupted()) {
try {
socket = serverSocket.accept();
CommunicationThread commThread = new CommunicationThread(socket);
new Thread(commThread).start();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
class CommunicationThread implements Runnable {
private Socket clientSocket;
private BufferedReader input;
public CommunicationThread(Socket clientSocket) {
this.clientSocket = clientSocket;
try {
this.input = new BufferedReader(new InputStreamReader(this.clientSocket.getInputStream()));
} catch (IOException e) {
e.printStackTrace();
}
}
public void run() {
while (!Thread.currentThread().isInterrupted()) {
try {
String read = input.readLine();
updateConversationHandler.post(new updateUIThread(read));
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
class updateUIThread implements Runnable {
private String msg;
public updateUIThread(String str) {
this.msg = str;
}
@Override
public void run() {
text.setText("");
if (msg != null){
text.setText(text.getText().toString()+"binary message sent: "+ msg + "\n");
String[] list_bin = new String[list_command.length];
for(int i=0 ; i<list_command.length; i++){
list_bin[i] = Integer.toBinaryString(i);
if ( list_bin[i] == null ? msg == null : list_bin[i].equals(msg)){
msg = list_command[i];
}
}
text.setText(text.getText().toString()+"Found input : "+ msg + "\n");
}
}
}
如何让服务器向客户端发送消息?
答案 0 :(得分:1)
最简单的方法是在OutputStreamWriter
上使用clientSocket.getOutputStream
,并从单独的线程写入它。