SMS Received

Sample of how to intercept a SMS with BroadcastReceiver

Simples steps:

1 - Declare in your manifest: AndroidManifest.xml

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

<application 
  [...]
    <receiver android:name="br.com.helpdev.smsreceiver.receiver.SMSReceiver"
                  android:exported="true"
                  android:permission="android.permission.BROADCAST_SMS">
            <intent-filter android:priority="1000">
                <action android:name="android.provider.Telephony.SMS_RECEIVED"/>
            </intent-filter>
        </receiver>
</application>

2 - Give the permission in your app MainActivity.kt

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        requestSmsPermission()
    }

    private fun requestSmsPermission() {
        val permission = Manifest.permission.RECEIVE_SMS
        val grant = ContextCompat.checkSelfPermission(this, permission)
        if (grant != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this, arrayOf(permission), REQUEST_CODE_SMS_PERMISSION)
        }
    }

3 - Implement your receiver: SMSReceiver.kt

class SMSReceiver : BroadcastReceiver() {
    companion object {
        private val TAG by lazy { SMSReceiver::class.java.simpleName }
    }

    override fun onReceive(context: Context?, intent: Intent?) {
        if (!intent?.action.equals(Telephony.Sms.Intents.SMS_RECEIVED_ACTION)) return
        val extractMessages = Telephony.Sms.Intents.getMessagesFromIntent(intent)
        extractMessages.forEach { smsMessage -> Log.v(TAG, smsMessage.displayMessageBody) }
        //TODO
    }
}