我想從我的筆記本電腦發送一個udp數據包到android設備,我寫了一個簡單的應用程序,但它不工作,我認爲我已經使用的端口(5554)是問題。 代碼:Android的udp端口
`私人無效runUdpServer()
EditText RecieveText = (EditText) findViewById(R.id.editText1);
EditText check = (EditText) findViewById(R.id.editText2);
String lText;
byte[] lMsg = new byte[MAX_UDP_DATAGRAM_LEN];
DatagramPacket dp = new DatagramPacket(lMsg, lMsg.length);
DatagramSocket ds = null;
RecieveText.setText("try1");
try {
RecieveText.setText("try2"); ds = new DatagramSocket(UDP_SERVER_PORT); // i think the problem is here
否則{RecieveText.setText( 「未連接」);}
//disable timeout for testing
if (ds != null){RecieveText.setText("connected");}
RecieveText.setText("try");
ds.receive(dp); lText = new String(lMsg, 0, dp.getLength()); Log.i("UDP packet received", lText); RecieveText.setText(lText); check.setText("port opened");
} catch (SocketException e) {`` check.setText("SocketException");
e.printStackTrace( );
} catch (IOException e) {
e.printStackTrace();
check.setText("port didn't open");
} finally {
if (ds != null) {
ds.close();
RecieveText.setText("not connected1");
}
else {RecieveText.setText("not connected1");}
}
check.setText("end");
if (ds != null){RecieveText.setText("connected");}
else {RecieveText.setText("not connected");} } }