Java socket code(not Android) works well..
But it's my first time writing socket code in Android SDK.
So I tried to write sample code in web.
The code is...
-------- AndroidUDP.java -----------
package com.android.UDPTest;
import android.app.Activity;
import android.os.Bundle;
public class AndroidUDP extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
new Thread(new Server()).start();
try {
Thread.sleep(500);
} catch (InterruptedException e) { }
new Thread(new Client()).start();
}
}
-- Server.java -----
package com.android.UDPTest;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import android.util.Log;
public class Server implements Runnable {
public static final String SERVERIP = "127.0.0.1"; // 'Within'
the emulator!
public static final int SERVERPORT = 9001;
@Override
public void run() {
try {
InetAddress serverAddr = InetAddress.getByName
(SERVERIP);
Log.d("UDP", "S: Connecting...");
/* UDP-Socket */
DatagramSocket socket = new DatagramSocket(SERVERPORT,
serverAddr);
byte[] buf = new byte[17];
DatagramPacket packet = new DatagramPacket(buf,
buf.length);
Log.d("UDP", "S: Receiving...");
socket.receive(packet);
Log.d("UDP", "S: Received: '" + new String
(packet.getData()) + "'");
Log.d("UDP", "S: Done.");
} catch (Exception e) {
Log.e("UDP", "S: Error", e);
}
}
}
------- Client.java ------------
package com.android.UDPTest;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import android.util.Log;
public class Client implements Runnable {
@Override
public void run() {
try {
// Retrieve the ServerName
InetAddress serverAddr = InetAddress.getByName
(Server.SERVERIP);
Log.d("UDP", "C: Connecting...");
/* UDP-Socket */
DatagramSocket socket = new DatagramSocket();
/* Prepare some data to be sent. */
byte[] buf = ("Hello from Client").getBytes();
DatagramPacket packet = new DatagramPacket(buf,
buf.length, serverAddr, Server.SERVERPORT);
Log.d("UDP", "C: Sending: '" + new String(buf) + "'");
socket.send(packet);
Log.d("UDP", "C: Sent.");
Log.d("UDP", "C: Done.");
} catch (Exception e) {
Log.e("UDP", "C: Error", e);
}
}
}
and Manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android";
package="com.android.UDPTest"
android:versionCode="1"
android:versionName="1.0.0">
<application android:icon="@drawable/icon" android:label="@string/
app_name">
<activity android:name=".AndroidUDP"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category
android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.INTERNET" />
</manifest>
What is the problem?
It is just CODE I paste from web. But not work..
Thx..again.
On Mar 20, 8:22 pm, Sean Hodges <[email protected]> wrote:
> Can you post up the socket code that you are trying to use?
>
> If this is your first time writing socket code in Java, you might
> benefit from writing a small test program on your PC (not based on
> Android SDK) that confirms what you are trying to do... An example
> tutorial that might
> help:http://java.sun.com/docs/books/tutorial/networking/sockets/readingWri...
>
>
>
> On Fri, Mar 20, 2009 at 11:14 AM, PluckyMan <[email protected]> wrote:
>
> > I'm sorry, but I set permission in my manifest.xml..
> > But it didn't works.
> > Someone said to me , permission's position is very important.
> > I set permission behind of </application>. Is this true?
> > And If this is true,do you have another solution for this problem?
> > Thanks very much for your help.
>
> > On Mar 20, 2:08 am, Sebastian Kaspari <[email protected]>
> > wrote:
> >> did you set proper permissions in your manifest.xml?
>
> >> <uses-permission
> >> android:name="android.permission.INTERNET" />
>
> >> android will throw an unknown socket error if the permission is
> >> missing... that's not very helpful :)- Hide quoted text -
>
> - Show quoted text -
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