android监听短信并判断是否未读

1. final String SMS_RECEIVED = "android.provider.Telephony.SMS_RECEIVED";  
2. BroadcastReceiver SMSbr = new BroadcastReceiver() {  
3.    
4.         @Override  
5.         public void onReceive(Context context, Intent intent) {  
6.                               Bundle bundle = intent.getExtras();  
7.                 if (bundle != null) {  
8.                                                 Object[] pdus = (Object[]) bundle.get("pdus");  
9.                         final SmsMessage[] messages = new SmsMessage[pdus.length];  
10.                         for (int i = 0; i < pdus.length; i++)  
11.                                 messages[i] = SmsMessage  
12.                                                 .createFromPdu((byte[]) pdus[i]);  
13.                         if (messages.length > -1) {  
14.                               .  
15.                                 String smsToast = "New SMS received from "  
16.                                                 + messages[0].getOriginatingAddress() + "\n'"  
17.                                                 + messages[0].getMessageBody() + "'";  
18.                                 Toast.makeText(context, smsToast, Toast.LENGTH_LONG)  
19.                                                 .show();  
20.                         }  
21.                 }  
22.         }  
23. };  
24.   
25. IntentFilter SMSfilter = new IntentFilter(SMS_RECEIVED);  
26. this.registerReceiver(SMSbr, SMSfilter);   
27.   
28. private boolean checkSMS() {  
29.         // Sets the sms inbox's URI  
30.         Uri uriSMS = Uri.parse("content://sms");  
31.         Cursor c = getBaseContext().getContentResolver().query(uriSMS, null,  
32.                         "read = 0", null, null);  
33.         // Checks the number of unread messages in the inbox  
34.         if (c.getCount() == 0) {  
35.                 return false;  
36.         } else  
37.                 return true;  
38. }   
39.   
40. <uses-permission id="android.permission.RECEIVE_SMS" />     
41. <uses-permission id="android.permission.READ_SMS" />