public static final String TAG = "ImiChatSMSReceiver";  public static final String SMS_RECEIVED_ACTION = "android.provider.Telephony.SMS_RECEIVED";  public void onReceive(Context context, Intent intent)  {    if (intent.getAction().equals(SMS_RECEIVED_ACTION))    {      SmsMessage[] messages = getMessagesFromIntent(intent);      for (SmsMessage message : messages)      {        String text = message.getOriginatingAddress() + " : " +        message.getDisplayOriginatingAddress() + " : " +        message.getDisplayMessageBody() + " : " +        message.getTimestampMillis();        String num = message.getOriginatingAddress();        Log.i(TAG, "-------------" + text);        Toast.makeText(context, text, Toast.LENGTH_LONG).show();        sendMessage(num, "来自" + num + "的短信已经收到", context);        context.getContentResolver().registerContentObserver(Uri.parse("content://sms/"), true, new SmsObserver(new Handler(), context));      }    }  }  public void sendMessage(String num, String text, Context context)  {    SmsManager smsManager = SmsManager.getDefault();    PendingIntent sentIntent = PendingIntent.getBroadcast(context, 0, new Intent(), 0);    String strContent = text;    smsManager.sendTextMessage(num, null, strContent, sentIntent, null);    TelephonyManager tl = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);    int itype = tl.getPhoneType();    Log.i(TAG, "-------------" + "当前卡类型为：" + itype);    if (itype == TelephonyManager.PHONE_TYPE_GSM)    {      Toast.makeText(context, "当前卡类型为：GSM", Toast.LENGTH_LONG).show();    }    else if (itype == TelephonyManager.PHONE_TYPE_CDMA)    {      Toast.makeText(context, "当前卡类型为 : CDMA", Toast.LENGTH_LONG).show();    }    else if (itype == TelephonyManager.PHONE_TYPE_NONE)    {      Toast.makeText(context, "当前卡类型为：NONE", Toast.LENGTH_LONG).show();    }  }  public final SmsMessage[] getMessagesFromIntent(Intent intent)  {    Object[] messages = (Object[]) intent.getSerializableExtra("pdus");    byte[][] pduObjs = new byte[messages.length][];    for (int i = 0; i < messages.length; i++)    {      pduObjs[i] = (byte[]) messages[i];    }    byte[][] pdus = new byte[pduObjs.length][];    int pduCount = pdus.length;    SmsMessage[] msgs = new SmsMessage[pduCount];    for (int i = 0; i < pduCount; i++)    {      pdus[i] = pduObjs[i];      msgs[i] = SmsMessage.createFromPdu(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)   {     super.onChange(selfChange);     Cursor cursor =null;     try    {      //读取收件箱中的短信       cursor = mContext.getContentResolver().query(Uri.parse("content://sms/inbox"), null, null, null, "date desc");       String body;      boolean hasDone =false;      if (cursor !=null)      {         while (cursor.moveToNext())        {          body = cursor.getString(cursor.getColumnIndex("body"));          if(body !=null)//&& body.equals("【startMyActivity】"          {            hasDone =true;            break;          }          if (hasDone)          {            break;          }        }       }     }    catch(Exception e)    {      e.printStackTrace();    }    finally    {      if(cursor!=null)    cursor.close();    }  }}

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