package com.example.multicast;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.MulticastSocket;
import javax.security.auth.PrivateCredentialPermission;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
private EditText txt;
private ProgressBar bar;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txt=(EditText)findViewById(R.id.editText1);
bar = (ProgressBar) findViewById(R.id.progressBar1);
}
public void startProgress(View view) {
new Thread(new server()).start();
new Thread(new client()).start();
}
class client implements Runnable {
@Override
public void run() {
try{
Log.v("ppp","try");
MulticastSocket socket = new MulticastSocket(9999);
Log.v("ppp","aftrsokt");
InetAddress group = InetAddress.getByName("224.0.0.1");
Log.v("ppp","b4join");
socket.joinGroup(group);
Log.v("ppp","join");
DatagramPacket packet;
byte[] buf = new byte[1024];
String received= "";
packet = new DatagramPacket(buf, buf.length);
Log.v("ppp", "creatpacket");
socket.receive(packet);
Log.v("ppp", "rcvpackt");
received = new String(packet.getData());
Log.v("ppp", "rcvd"+received);
received =new String(buf,0,packet.getLength());
Log.v("ppp","rcvd"+received);
txt.setText("ppp"); ///ERROR
Log.v("ppp", "aftr txt.settext");
bar.setProgress(5);
System.out.println("Address: " + received);
Toast.makeText(MainActivity.this,"OnClickListener : " +
" "+received,
Toast.LENGTH_LONG).show();
socket.leaveGroup(group);
socket.close();
}
catch(Exception e){
Log.v("ppp","try"+e);
}
}
}
class server implements Runnable {
byte [] buffer=new byte[1024];
DatagramPacket packet;
@Override
public void run() {
try{
DatagramSocket socket = new DatagramSocket();
String ip="haaii";
Log.v("ppp","hi");
buffer = ip.getBytes();
packet = new DatagramPacket(buffer, buffer.length, InetAddress.getByName("224.0.0.1"),9999);
socket.send(packet);
socket.close();
Log.v("ppp","socketclose");
}
catch(Exception e){
}
}
}
}
this shows the error
android.view.ViewRoot$CalledFromWrongThreadException:
Only the original thread that created a view hierarchy can touch its views.
What can I do to set the text to the TextView?
the xml is given below
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ProgressBar
android:id="@+id/progressBar1"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:indeterminate="false"
android:max="10"
android:padding="4dip" >
</ProgressBar>
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="startProgress"
android:text="Start" />
<EditText
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
