求修改程序

package com.buckle2000.receiver;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.net.UnknownHostException;
public class MainActivity extends Activity {
private Button btn1;
private DatagramSocket sendSocket;
private DatagramPacket sendPacket;
private EditText data;
private EditText IP;
private InetAddress addr;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn1 = (Button) findViewById(R.id.btn1);
data = (EditText) findViewById(R.id.editText1);
IP = (EditText) findViewById(R.id.editText2);
btn1.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
try {
addr = InetAddress.getByName(IP.toString());
} catch (UnknownHostException e) {
e.printStackTrace();
}
sendPacket = new DatagramPacket(data.toString().getBytes(), data.toString().getBytes().length, addr, 4545);
//初始化数据报
new Thread() {
try{
sendSocket = new DatagramSocket();
sendSocket.send(sendPacket);//发送
}catch(SocketException e){
e.printStackTrace();
}catch(IOException e){
e.printStackTrace();
}
sendSocket.close();
}.start();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
你试试吧

加线程运行就好了，应该报错也说了