Android intercepts SMS messages and blocks system notifications.

Android intercepts SMS messages and blocks system notifications.

There are several key points to intercept text messages:

 

1. android receives text messages in broadcast mode.

2. You only need to add the "receive" SMS permission to your Manifest. xml file.

1. <Uses-permission android: name = "android. permission. RECEIVE_SMS"> </uses-permission>

 

3. Write a broadcast receiving class.

1. Public class smsreceiveandmask extends BroadcastReceiver {
2. Private String TAG = "smsreceiveandmask ";
3. @ Override
4. Public void onReceive (Context context, Intent intent ){
6. }

 

4. intent-filter should be added to the receiver tag of Manifest. xml, and action is

1. <Action android: name = "android. provider. Telephony. SMS_RECEIVED"/>

 

5. It is important to add the priority on the intent-filter so that you can receive SMS messages that take precedence over the system or other software.

1. <Cycler android: name = ". smsreceiveandmask">
2. <Intent-filter android: priority = "1000">
3. <Action android: name = "android. provider. Telephony. SMS_RECEIVED"/>
4. </Intent-filter>
5. </Cycler>

 

6. when your program receives the SMS to be blocked, use this. abortBroadcast (); to end broadcasting and send it to other programs, so that the system will not receive text message broadcast and Notification will not prompt

1. // Step 3: Cancel
2. If (flags_filter ){
3. This. abortBroadcast ();
4. }

 

 

The source code is as follows:

Manifest. xml

1. <? Xml version = "1.0" encoding = "UTF-8"?>
2. <Manifest xmlns: android = "http://schemas.android.com/apk/res/android"
3. Package = "com. hwttnet. test. smsreceiveandmask" android: versionCode = "1"
4. Android: versionName = "1.0" type = "codeph" text = "/codeph">
5. <Uses-sdk android: minSdkVersion = "3"/>
6. <Uses-permission android: name = "android. permission. RECEIVE_SMS"> </uses-permission>
7. <Application android: icon = "@ drawable/icon" android: label = "@ string/app_name">
8. <Cycler android: name = ". smsreceiveandmask">
9. <Intent-filter android: priority = "1000">
10. <Action android: name = "android. provider. Telephony. SMS_RECEIVED"/>
11. </Intent-filter>
12. </Cycler>
13. </Application>
14. </Manifest>

 

 

BroadcastReceiver class:

 

 

1. Package com. hwttnet. test. smsreceiveandmask;
2. Import android. app. Activity;
3. Import android. content. BroadcastReceiver;
4. Import android. content. Context;
5. Import android. content. Intent;
6. Import android. OS. Bundle;
7. Import android. telephony. SmsMessage;
8. Import android. util. Log;
9. Public class smsreceiveandmask extends BroadcastReceiver {
10. Private String TAG = "smsreceiveandmask ";
11. @ Override
12. Public void onReceive (Context context, Intent intent ){
13. Log. v (TAG, ">>>>>> onReceive start ");
14. // Step 1. Obtain the text message content and sender
15. StringBuilder body = new StringBuilder (); // text message content
16. StringBuilder number = new StringBuilder (); // SMS sender
17. Bundle bundle = intent. getExtras ();
18. If (bundle! = Null ){
19. Object [] _ pdus = (Object []) bundle. get ("pdus ");
20. SmsMessage [] message = new SmsMessage [_ pdus. length];
21. For (int I = 0; I <_ pdus. length; I ++ ){
22. Message [I] = SmsMessage. createFromPdu (byte []) _ pdus [I]);
23. }
24. For (SmsMessage currentMessage: message ){
25. Body. append (currentMessage. getDisplayMessageBody ());
26. Number. append (currentMessage. getDisplayOriginatingAddress ());
27. }
28. String smsBody = body. toString ();
29. String smsNumber = number. toString ();
30. If (smsNumber. contains ("+ 86 ")){
31. SmsNumber = smsNumber. substring (3 );
32. }
33. // Step 2: Check whether the text message content meets the filtering conditions.
34. Boolean flags_filter = false;
35. If (smsNumber. equals ("10086") {// Block messages sent from 10086
36. Flags_filter = true;
37. Log. v (TAG, "sms_number.equals (10086 )");
38. }
39. // Step 3: Cancel
40. If (flags_filter ){
41. This. abortBroadcast ();
42. }
43. }
44. Log. v (TAG, ">>>>>> onReceive end ");
45. }
46. }