Pass data from BroadcastReceiver class to a Android Activity

I'm developing an Android application and it has a functionality that while the application is running if I receive an new SMS message the content of that message need to be read using TextToSpeech. I know how to read a text using TextToSpeech. I have written two classes on my application. one is MainActivity extends from Activity and the other one is SmsReceiver extends from BroadcastReceiver. When a Sms is received while the MainActivity is running I want get the content of the sms message using SmsReceiver and pass it to MainActivity and then read it inside MainActivity using TextToSpeech. How can I pass the content of the sms from SmsReceiver to my MainActivity. A copy of my SmsReceiver class is pasted bellow.

public class SmsReceiver extends BroadcastReceiver{


@Override
public void onReceive(Context context, Intent intent) {
    //this stops notifications to others
    this.abortBroadcast();

    //---get the SMS message passed in---
    Bundle bundle = intent.getExtras();   
    SmsMessage[] msgs = null;
    String from = null;
    String msg= null;
    String str = "";            
    if (bundle != null)
    {
        //---retrieve the SMS message received---
        Object[] pdus = (Object[]) bundle.get("pdus");
        msgs = new SmsMessage[pdus.length];            
        for (int i=0; i<msgs.length; i++){
            msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);                
            str += "SMS from " + msgs[i].getOriginatingAddress();
            from = msgs[i].getOriginatingAddress();
            str += " :";
            str += msgs[i].getMessageBody().toString();
            msg = msgs[i].getMessageBody().toString();
            str += "\n"; 
        }
        System.out.println("from "+from);
        System.out.println("msg "+msg);
        Toast.makeText(context, "SMS Received : ",Toast.LENGTH_LONG).show();

        //continue the normal process of sms and will get alert and reaches inbox
            this.clearAb