Two ways to listen to text messages in Android

public static final String TAG = "ImiChatSMSReceiver";

  public static final String SMS_RECEIVED_ACTION = ".SMS_RECEIVED";

  public void onReceive(Context context, Intent intent)
  {
    if (().equals(SMS_RECEIVED_ACTION))
    {
      SmsMessage[] messages = getMessagesFromIntent(intent);

      for (SmsMessage message : messages)
      {

        String text = () + " : " +

        () + " : " +

        () + " : " +

        ();

        String num = ();
        (TAG, "-------------" + text);
        (context, text, Toast.LENGTH_LONG).show();
        sendMessage(num, "From" + num + "The text message has been received", context);

        ().registerContentObserver(("content://sms/"), true, new SmsObserver(new Handler(), context));
      }
    }
  }

  public void sendMessage(String num, String text, Context context)
  {
    SmsManager smsManager = ();
    PendingIntent sentIntent = (context, 0, new Intent(), 0);
    String strContent = text;

    (num, null, strContent, sentIntent, null);

    TelephonyManager tl = (TelephonyManager) (Context.TELEPHONY_SERVICE);
    int itype = ();
    (TAG, "-------------" + "The current card type is:" + itype);
    if (itype == TelephonyManager.PHONE_TYPE_GSM)
    {
      (context, "Current card type is: GSM", Toast.LENGTH_LONG).show();
    }
    else if (itype == TelephonyManager.PHONE_TYPE_CDMA)
    {
      (context, "Current card type is: CDMA", Toast.LENGTH_LONG).show();
    }
    else if (itype == TelephonyManager.PHONE_TYPE_NONE)
    {
      (context, "Current card type is: NONE", Toast.LENGTH_LONG).show();
    }
  }

  public final SmsMessage[] getMessagesFromIntent(Intent intent)
  {

    Object[] messages = (Object[]) ("pdus");

    byte[][] pduObjs = new byte[][];

    for (int i = 0; i < ; i++)

    {

      pduObjs[i] = (byte[]) messages[i];

    }

    byte[][] pdus = new byte[][];

    int pduCount = ;

    SmsMessage[] msgs = new SmsMessage[pduCount];

    for (int i = 0; i < pduCount; i++)

    {

      pdus[i] = pduObjs[i];

      msgs[i] = (pdus[i]);

    }

    return msgs;

  }

public class SmsObserver extends ContentObserver
{

  private Context mContext;

  public SmsObserver(Handler handler , Context context)
  {
    super(handler);
    mContext = context;
  }
  
  public void onChange(boolean selfChange) 
  { 
    (selfChange); 
    Cursor cursor =null; 
    try
    {
      //Read SMS in Inbox      cursor = ().query(("content://sms/inbox"), null, null, null, "date desc"); 
      String body;
      boolean hasDone =false;
      if (cursor !=null)
      { 
        while (())
        {
          body = (("body"));
          if(body !=null)//&& ("【startMyActivity】"
          {
            hasDone =true;
            break;
          }
          if (hasDone)
          {
            break;
          }
        } 
      } 
    }
    catch(Exception e)
    {
      ();
    }
    finally
    {
      if(cursor!=null)    ();
    }
  }

}

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