Android intercepts SMS messages and blocks system notifications.

Source: Internet
Author: User

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 ){
  5. }

 

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. }

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