我是 android OS 开发的新手。我尝试为 android OS 开发我的 telnet 客户端。现在，我只尝试连接 telnet 服务器，并接收登录消息。
但是当我启动套接字连接远程登录服务器时，我收到了奇怪的符号??????!????，而不是来自远程登录服务器的登录消息。
public class MainActivity extends Activity {
protected static final int TCP_SERVER_PORT = 23;
protected String inMsg, str;
static Editable sentence;
static String modifedSentence;
BufferedReader inFromUser;
Socket clientSocket = null;
DataOutputStream outToServer=null;
BufferedReader inFromServer=null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button startButton = (Button)findViewById(R.id.startButton);
final TextView textView = (TextView)findViewById(R.id.textView);
startButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0) {
new Thread(new Runnable() {
@Override
public void run() {
//Create socket
try {
clientSocket = new Socket("192.168.1.1",23);
//Create out stream for ClientSocket
outToServer = new DataOutputStream(clientSocket.getOutputStream());
//Create ib stream for ClientSocket
inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
//Receive login message from telnet server
modifedSentence = inFromServer.readLine();
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//Update UI activity with login message
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
textView.setText(modifedSentence);
}
});
}
}).start();
}
});
}
protected void onDestroy()
{
try {
clientSocket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}