Android Listen For Incoming SMS Messages

Question

I am trying to create an application for monitoring incoming SMS messages  and launch a program via incoming SMS  also it should read the content from the SMS   Workflow    SMS sent to Android device   self executable Application   Read the SMS information

User · Answer

broadcast implementation on Kotlin    private class SmsListener   BroadcastReceiver         override fun onReceive context  Context   intent  Intent             Log d TAG   SMS Received             val txt   getTextFromSms intent  extras          Log d TAG   message     txt             private fun getTextFromSms extras  Bundle    String           val pdus   extras  get  pdus   as Array lt   gt          val format   extras getString  format           var txt              for  pdu in pdus                val smsmsg   getSmsMsg pdu as ByteArray   format              val submsg   smsmsg  displayMessageBody             submsg  let   txt     txt it                      return txt            private fun getSmsMsg pdu  ByteArray   format  String    SmsMessage            return when               SDK INT  gt   Build VERSION CODES M - gt  SmsMessage createFromPdu pdu  format              else - gt  SmsMessage createFromPdu pdu                       companion object           private val TAG   SmsListener  class java simpleName           Note  In your manifest file add the BroadcastReceiver-   lt receiver android name   listener SmsListener  gt       lt intent-filter gt           lt action android name  android provider Telephony SMS RECEIVED    gt       lt  intent-filter gt   lt  receiver gt    Add this permission    lt uses-permission android name  android permission RECEIVE SMS    gt

User · Answer

Mike M  and I found an issue with the accepted answer  see our comments    Basically  there is no point in going through the for loop if we are not concatenating the multipart message each time   for  int i   0  i  lt  msgs length  i          msgs i    SmsMessage createFromPdu  byte   pdus i        msg from   msgs i  getOriginatingAddress        String msgBody   msgs i  getMessageBody        Notice that we just set msgBody to the string value of the respective part of the message no matter what index we are on  which makes the entire point of looping through the different parts of the SMS message useless  since it will just be set to the very last index value  Instead we should use     or as Mike noted  StringBuilder   All in all  here is what my SMS receiving code looks like   if  myBundle    null        Object   pdus    Object    myBundle get  pdus       pdus is key for SMS in bundle        Object    pdus now contains array of bytes     messages   new SmsMessage pdus length       for  int i   0  i  lt  messages length  i               messages i    SmsMessage createFromPdu  byte    pdus i      Returns one message  in array because multipart message due to sms max char          Message    messages i  getMessageBody       Using     because need to add multipart from before also            contactNumber   messages 0  getOriginatingAddress      This could also be inside the loop  but there is no need     Just putting this answer out there in case anyone else has the same confusion

User · Answer

Note that on some devices your code wont work without android priority  1000  in intent filter    lt receiver android name   listener SmsListener  gt       lt intent-filter android priority  1000  gt           lt action android name  android provider Telephony SMS RECEIVED    gt       lt  intent-filter gt   lt  receiver gt    And here is some optimizations   public class SmsListener extends BroadcastReceiver        Override     public void onReceive Context context  Intent intent            if  Telephony Sms Intents SMS RECEIVED ACTION equals intent getAction                   for  SmsMessage smsMessage   Telephony Sms Intents getMessagesFromIntent intent                     String messageBody   smsMessage getMessageBody                                      Note   The value must be an integer  such as  100   Higher numbers have a higher priority  The default value is 0  The value must be greater than -1000 and less than 1000   Here s a link

User · Answer

The accepted answer is correct and works on older versions of Android where Android OS asks for permissions at the app install  However on newer versions Android it doesn t work straight away because newer Android OS asks for permissions during runtime when the app requires that feature  Therefore in order to receive SMS on newer versions of Android using technique mentioned in accepted answer programmer must also implement code that will check and ask for permissions from user during runtime  In this case permissions checking functionality code can be implemented in onCreate   of app s first activity  Just copy and paste following two methods in your first activity and call checkForSmsReceivePermissions   method at the end of onCreate         void checkForSmsReceivePermissions           Check if App already has permissions for receiving SMS     if ContextCompat checkSelfPermission getBaseContext     android permission RECEIVE SMS      PackageManager PERMISSION GRANTED               App has permissions to listen incoming SMS messages         Log d  adnan    checkForSmsReceivePermissions  Allowed          else              App don t have permissions to listen incoming SMS messages         Log d  adnan    checkForSmsReceivePermissions  Denied                Request permissions from user          ActivityCompat requestPermissions this  new String    Manifest permission RECEIVE SMS   43391             Override public void onRequestPermissionsResult int requestCode   NonNull String   permissions   NonNull int   grantResults        super onRequestPermissionsResult requestCode  permissions  grantResults       if requestCode    43391           if grantResults length gt 0  amp  amp  grantResults 0     PackageManager PERMISSION GRANTED               Log d  adnan    Sms Receive Permissions granted              else               Log d  adnan    Sms Receive Permissions denied

User · Answer

This is what i used    public class SMSListener extends BroadcastReceiver           Get the object of SmsManager     final SmsManager sms   SmsManager getDefault    String mobile body       public void onReceive Context context  Intent intent                Retrieves a map of extended data from the intent          final Bundle bundle   intent getExtras             try                if  bundle    null                     final Object   pdusObj    Object    bundle get  pdus                     for  int i   0  i  lt  pdusObj length  i                           SmsMessage currentMessage   SmsMessage createFromPdu  byte    pdusObj i                        String phoneNumber   currentMessage getDisplayOriginatingAddress                         String senderNum   phoneNumber                      String message   currentMessage getDisplayMessageBody                         mobile senderNum replaceAll    s                            body message replaceAll    s                              Log i  SmsReceiver    senderNum     senderNum      message      body                            Show Alert                     int duration   Toast LENGTH LONG                      Toast toast   Toast makeText context                               senderNum     mobile     message      message  duration                       toast show                          end for loop                  bundle is null            catch  Exception e                Log e  SmsReceiver    Exception smsReceiver   e

User · Answer

public class SmsListener extends BroadcastReceiver       private SharedPreferences preferences        Override     public void onReceive Context context  Intent intent               TODO Auto-generated method stub          if intent getAction   equals  android provider Telephony SMS RECEIVED                 Bundle bundle   intent getExtras                ---get the SMS message passed in---             SmsMessage   msgs   null              String msg from              if  bundle    null                     ---retrieve the SMS message received---                 try                      Object   pdus    Object    bundle get  pdus                        msgs   new SmsMessage pdus length                       for int i 0  i lt msgs length  i                             msgs i    SmsMessage createFromPdu  byte   pdus i                            msg from   msgs i  getOriginatingAddress                            String msgBody   msgs i  getMessageBody                                           catch Exception e                                 Log d  Exception caught  e getMessage                                                         Note  In your manifest file add the BroadcastReceiver-   lt receiver android name   listener SmsListener  gt       lt intent-filter gt           lt action android name  android provider Telephony SMS RECEIVED    gt       lt  intent-filter gt   lt  receiver gt    Add this permission    lt uses-permission android name  android permission RECEIVE SMS    gt

User · Answer

In case you want to handle intent on opened activity  you can use PendintIntent  Complete steps below    public class SMSReciver extends BroadcastReceiver        Override     public void onReceive Context context  Intent intent            final Bundle bundle   intent getExtras            try               if  bundle    null                    final Object   pdusObj    Object    bundle get  pdus                    for  int i   0  i  lt  pdusObj length  i                          SmsMessage currentMessage   SmsMessage createFromPdu  byte    pdusObj i                        String phoneNumber   currentMessage getDisplayOriginatingAddress                        String senderNum   phoneNumber                      String message   currentMessage getDisplayMessageBody                        try                           if  senderNum contains  MOB NUMBER                                  Toast makeText context    Toast LENGTH SHORT  show                                 Intent intentCall   new Intent context  MainActivity class                               intentCall putExtra  message   currentMessage getMessageBody                                  PendingIntent pendingIntent  PendingIntent getActivity context  0  intentCall  PendingIntent FLAG UPDATE CURRENT                               pendingIntent send                                                    catch  Exception e                                                                    catch  Exception e                         manifest    lt activity android name   MainActivity              android launchMode  singleTask   gt   lt receiver android name   SMSReciver  gt               lt intent-filter android priority  1000  gt                   lt action android name  android provider Telephony SMS RECEIVED   gt               lt  intent-filter gt           lt  receiver gt    onNewIntent     Override          protected void onNewIntent Intent intent                    super onNewIntent intent                   Toast makeText this   onNewIntent   Toast LENGTH SHORT  show                     onSMSReceived intent getStringExtra  message                      permissions    lt uses-permission android name  android permission RECEIVE SMS    gt   lt uses-permission android name  android permission READ SMS    gt   lt uses-permission android name  android permission SEND SMS    gt

User · Answer

If someone referring how to do the same feature  reading OTP using received SMS  on Xamarin Android like me      Add this code to your AndroidManifest xml file     lt receiver android name   listener BroadcastReveiverOTP  gt   lt intent-filter gt       lt action android name  android provider Telephony SMS RECEIVED    gt   lt  intent-filter gt   lt  receiver gt   lt uses-permission android name  android permission RECEIVE SMS    gt   lt uses-permission android name  android permission BROADCAST SMS    gt   lt uses-permission android name  android permission READ SMS    gt   Then create your BroadcastReveiver class in your Android Project     BroadcastReceiver Enabled   true    IntentFilter new      android provider Telephony SMS RECEIVED     Priority    int IntentFilterPriority HighPriority    public class BroadcastReveiverOTP   BroadcastReceiver           public static readonly string INTENT ACTION    android provider Telephony SMS RECEIVED            protected string message  address   string Empty           public override void OnReceive Context context  Intent intent                        if  intent HasExtra  pdus                                  var smsArray    Java Lang Object   intent Extras Get  pdus                    foreach  var item in smsArray                                        var sms   SmsMessage CreateFromPdu  byte   item                       address   sms OriginatingAddress                      if  address Equals  NotifyDEMO                                                  message   sms MessageBody                          string   pin   message Split                               if   string IsNullOrWhiteSpace pin 0                                                                  NOTE   Here I m passing received OTP to Portable Project using MessagingCenter  So I can display the OTP in the relevant entry field                                  MessagingCenter Send lt object  string gt  this MessengerKeys OnBroadcastReceived  pin 0                                                                                                     Register this BroadcastReceiver class in your MainActivity class on Android Project     public class MainActivity   global  Xamarin Forms Platform Android FormsAppCompatActivity               Initialize your class         private BroadcastReveiverOTP  receiver   new BroadcastReveiverOTP              protected override void OnCreate Bundle bundle                     base OnCreate bundle                    global  Xamarin Forms Forms Init this  bundle                   LoadApplication new App                         Register your receiver    RegisterReceiver  receiver  new IntentFilter  android provider Telephony SMS RECEIVED

User · Answer

Thank to  Vineet Shukla  the accepted answer  and  Ruchir Baronia  found the issue in the accepted answer   below is the Kotlin version   Add permission    lt uses-permission android name  android permission RECEIVE SMS    gt    Register BroadcastReceiver in AndroidManifest    lt receiver     android name   receiver SmsReceiver      android enabled  true      android exported  true  gt       lt intent-filter android priority  2332412  gt           lt action android name  android provider Telephony SMS RECEIVED    gt       lt  intent-filter gt   lt  receiver gt    Add implementation for BroadcastReceiver   class SmsReceiver   BroadcastReceiver         private var mLastTimeReceived   System currentTimeMillis        override fun onReceive p0  Context   intent  Intent             val currentTimeMillis   System currentTimeMillis           if  currentTimeMillis - mLastTimeReceived  gt  200                mLastTimeReceived   currentTimeMillis              val pdus  Array lt   gt              val msgs  Array lt SmsMessage  gt              var msgFrom  String              var msgText  String              val strBuilder   StringBuilder               intent  extras  let                   try                       pdus   it get  pdus   as Array lt   gt                      msgs   arrayOfNulls pdus size                      for  i in msgs indices                            msgs i    SmsMessage createFromPdu pdus i  as ByteArray                          strBuilder append msgs i   messageBody                                             msgText   strBuilder toString                       msgFrom   msgs 0   originatingAddress                      if   msgFrom isNullOrBlank    amp  amp   msgText isNullOrBlank                                                            Do some thing here                                                                    catch  e  Exception                                                        Sometime event fires twice so I add mLastTimeReceived   System currentTimeMillis

[android] Android – Listen For Incoming SMS Messages

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