I am trying to read messages from an inbox and display them in an activity. My activity contains a button and listview. When I click on the button, all messages from the inbox are displayed. But my requirement is that I need to view messages from a particular number. My application is not running when I get messages from that number when I click on the click button only specific messages (associated with a particular number) must be updated. Here's the relevant code.
myActivity.java:
public class SecureMessagesActivity extends Activity implements OnClickListener, OnItemClickListener {
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setTheme( android.R.style.Theme_Light );
        setContentView(R.layout.main);
        this.findViewById( R.id.UpdateList ).setOnClickListener( this );
    }
    ArrayList<String> smsList = new ArrayList<String>();
    public void onItemClick( AdapterView<?> parent, View view, int pos, long id ) {
        try {
            String[] splitted = smsList.get( pos ).split("\n"); 
            String sender = splitted[0];
            String encryptedData = "";
            for ( int i = 1; i < splitted.length; ++i ) {
                encryptedData += splitted[i];
            }
            String data = sender + "\n" + StringCryptor.decrypt( new String(SmsReceiver.PASSWORD), encryptedData );
            Toast.makeText( this, data, Toast.LENGTH_SHORT ).show();
        } 
        catch (Exception e) {
                e.printStackTrace();
        }
    }
    public void onClick( View v ) {
        ContentResolver contentResolver = getContentResolver();
        Cursor cursor = contentResolver.query( Uri.parse( "content://sms/inbox" ), null, null, null, null);
        int indexBody = cursor.getColumnIndex( SmsReceiver.BODY );
        int indexAddr = cursor.getColumnIndex( SmsReceiver.ADDRESS );
        if ( indexBody < 0 || !cursor.moveToFirst() ) return;
        smsList.clear();
        do {
            String str = "Sender: " + cursor.getString( indexAddr ) + "\n" + cursor.getString( indexBody );
            smsList.add( str );
        }
        while( cursor.moveToNext() );
        ListView smsListView = (ListView) findViewById( R.id.SMSList );
        smsListView.setAdapter( new ArrayAdapter<String>( this, android.R.layout.simple_list_item_1, smsList) );
        smsListView.setOnItemClickListener( this );
    }
} 
SmsReceiver.java:
public class SmsReceiver extends BroadcastReceiver {
    public static final String SMS_EXTRA_NAME = "pdus";
    public static final String SMS_URI = "content://sms";
    public static final String ADDRESS = "address";
    public static final String PERSON = "person";
    public static final String DATE = "date";
    public static final String READ = "read";
    public static final String STATUS = "status";
    public static final String TYPE = "type";
    public static final String BODY = "body";
    public static final String SEEN = "seen";
    public static final int MESSAGE_TYPE_INBOX = 1;
    public static final int MESSAGE_TYPE_SENT = 2;
    public static final int MESSAGE_IS_NOT_READ = 0;
    public static final int MESSAGE_IS_READ = 1;
    public static final int MESSAGE_IS_NOT_SEEN = 0;
    public static final int MESSAGE_IS_SEEN = 1;
    public static final byte[] PASSWORD = new byte[]{ 0x20, 0x32, 0x34, 0x47, (byte) 0x84, 0x33, 0x58 };
    public void onReceive( Context context, Intent intent ) {
        Bundle extras = intent.getExtras();
        String messages = "";
        if ( extras != null ) {
            Object[] smsExtra = (Object[]) extras.get( SMS_EXTRA_NAME );
            ContentResolver contentResolver = context.getContentResolver();
            for ( int i = 0; i < smsExtra.length; ++i ) {
                SmsMessage sms = SmsMessage.createFromPdu((byte[])smsExtra[i]);
                String body = sms.getMessageBody().toString();
                String address = sms.getOriginatingAddress();
                messages += "SMS from " + address + " :\n";                    
                messages += body + "\n";
                putSmsToDatabase( contentResolver, sms );
            }
            // Display SMS message
            Toast.makeText( context, messages, Toast.LENGTH_SHORT ).show();
        }
        // WARNING!!! 
        // If you uncomment next line then received SMS will not be put to incoming.
        // Be careful!
        // this.abortBroadcast(); 
    }
    private void putSmsToDatabase( ContentResolver contentResolver, SmsMessage sms ) {
        ContentValues values = new ContentValues();
        values.put( ADDRESS, sms.getOriginatingAddress() );
        values.put( DATE, sms.getTimestampMillis() );
        values.put( READ, MESSAGE_IS_NOT_READ );
        values.put( STATUS, sms.getStatus() );
        values.put( TYPE, MESSAGE_TYPE_INBOX );
        values.put( SEEN, MESSAGE_IS_NOT_SEEN );
        try {
            String encryptedPassword = StringCryptor.encrypt( new String(PASSWORD), sms.getMessageBody().toString() ); 
            values.put( BODY, encryptedPassword );
        }
        catch ( Exception e ) { 
            e.printStackTrace(); 
        }
        // Push row into the SMS table
        contentResolver.insert( Uri.parse( SMS_URI ), values );
    }
}