Listening incoming sms message in Android

When a new sms message is received by the device, a Broadcast Receiver is registered. For this

IntentFilter filter = new IntentFilter(SMS_RECEIVED);
registerReceiver(receiver_SMS, filter);

should be included . Also sms are sent in PDU’s(Protocol Description Units) format, which act as an encapsulation.
Inorder to extract from PDU to byte array

messages[i] = SmsMessage.createFromPdu((byte[]) pdus[i]);

method is used.
When sms comes, the BroadCast listener is activated and sms sender number is showed in a ListView

package com.coderzheaven.pack;

import java.util.ArrayList;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.telephony.SmsMessage;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class smsReceiver extends Activity
{
    /** Called when the activity is first created. */
	 public static final String SMS_RECEIVED = "android.provider.Telephony.SMS_RECEIVED";
	 ListView list;
	 ArrayList<String> messageList;
	 ArrayAdapter< String> adapter;
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        list = (ListView) findViewById(R.id.listView1);

        messageList  = new ArrayList<String>();
        //messageList.add("check");
       adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, messageList);
       list.setAdapter(adapter);

        IntentFilter filter = new IntentFilter(SMS_RECEIVED);
        registerReceiver(receiver_SMS, filter);
    }
    BroadcastReceiver receiver_SMS = new BroadcastReceiver()
    {
		public void onReceive(Context context, Intent intent)
		{
			 if (intent.getAction().equals(SMS_RECEIVED))
			 {
			        Bundle bundle = intent.getExtras();
			        if (bundle != null)
			        {
			          Object[] pdus = (Object[]) bundle.get("pdus");
			          SmsMessage[] messages = new SmsMessage[pdus.length];

			          for (int i = 0; i < pdus.length; i++)
			            messages[i] = SmsMessage.createFromPdu((byte[]) pdus[i]);

			          for (SmsMessage message : messages)
			          {
			            	 Toast.makeText(smsReceiver.this, "----"+message.getDisplayMessageBody(), Toast.LENGTH_LONG).show();
			            	 receivedMessage(message.getDisplayOriginatingAddress());
			          }
			        }
			      }
		}
	};
	private void receivedMessage(String message)
	{
		messageList.add(message);
		adapter.notifyDataSetChanged();
	}
}

The xml hold a ListView

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    />
<ListView android:layout_height="fill_parent"
	android:id="@+id/listView1"
	android:layout_width="fill_parent"/>
</LinearLayout>

Also important part is that, for an application to listen an SMS Intent Broadcast should be added

<uses-permission android:name="android.permission.RECEIVE_SMS"/>

This post explains How to get the SMS sent to your emulator within your application