creating a helper function for fetching the thread id

app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt

@@ -50,8 +50,8 @@ class ThreadActivity : SimpleActivity() {
     }
 
     private fun setupAdapter() {
-        val threadID = intent.getIntExtra(THREAD_ID, 0)
+        val threadId = intent.getIntExtra(THREAD_ID, 0)
-        val items = getThreadItems(threadID)
+        val items = getThreadItems(threadId)
 
         runOnUiThread {
             val adapter = ThreadAdapter(this, items, thread_messages_list, thread_messages_fastscroller) {}

app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Context.kt

@@ -1,5 +1,6 @@
 package com.simplemobiletools.smsmessenger.extensions
 
+import android.annotation.SuppressLint
 import android.content.ContentValues
 import android.content.Context
 import android.database.Cursor
@@ -9,6 +10,7 @@ import android.provider.Telephony
 import android.text.TextUtils
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.PERMISSION_READ_CONTACTS
+import com.simplemobiletools.commons.helpers.isMarshmallowPlus
 import com.simplemobiletools.smsmessenger.helpers.Config
 import com.simplemobiletools.smsmessenger.models.Message
 
@@ -160,7 +162,7 @@ fun Context.getNameFromPhoneNumber(number: String): Int? {
     return null
 }
 
-fun Context.insertNewSMS(address: String, subject: String, body: String, date: Long, threadID: Long) {
+fun Context.insertNewSMS(address: String, subject: String, body: String, date: Long, threadId: Long) {
     val uri = Telephony.Sms.CONTENT_URI
     val contentValues = ContentValues().apply {
         put(Telephony.Sms.ADDRESS, address)
@@ -168,7 +170,7 @@ fun Context.insertNewSMS(address: String, subject: String, body: String, date: L
         put(Telephony.Sms.BODY, body)
         put(Telephony.Sms.DATE, date)
         put(Telephony.Sms.READ, 0)
-        put(Telephony.Sms.THREAD_ID, threadID)
+        put(Telephony.Sms.THREAD_ID, threadId)
         put(Telephony.Sms.TYPE, Telephony.Sms.MESSAGE_TYPE_INBOX)
     }
 
@@ -198,3 +200,12 @@ fun Context.markSMSRead(id: Int) {
     val selectionArgs = arrayOf(id.toString(), "0")
     contentResolver.update(uri, contentValues, selection, selectionArgs)
 }
+
+@SuppressLint("NewApi")
+fun Context.getThreadId(address: String): Long {
+    return if (isMarshmallowPlus()) {
+        Telephony.Threads.getOrCreateThreadId(this, address)
+    } else {
+        0
+    }
+}

app/src/main/kotlin/com/simplemobiletools/smsmessenger/receivers/SmsReceiver.kt

@@ -19,10 +19,10 @@ import android.widget.TextView
 import androidx.core.app.NotificationCompat
 import com.simplemobiletools.commons.extensions.getAdjustedPrimaryColor
 import com.simplemobiletools.commons.extensions.getContrastColor
-import com.simplemobiletools.commons.helpers.isMarshmallowPlus
 import com.simplemobiletools.commons.helpers.isOreoPlus
 import com.simplemobiletools.smsmessenger.R
 import com.simplemobiletools.smsmessenger.activities.ThreadActivity
+import com.simplemobiletools.smsmessenger.extensions.getThreadId
 import com.simplemobiletools.smsmessenger.extensions.insertNewSMS
 import com.simplemobiletools.smsmessenger.helpers.THREAD_ID
 import com.simplemobiletools.smsmessenger.helpers.THREAD_NAME
@@ -30,7 +30,6 @@ import com.simplemobiletools.smsmessenger.helpers.THREAD_NUMBER
 import com.simplemobiletools.smsmessenger.helpers.refreshMessages
 
 class SmsReceiver : BroadcastReceiver() {
-    @SuppressLint("NewApi")
     override fun onReceive(context: Context, intent: Intent) {
         val messages = Telephony.Sms.Intents.getMessagesFromIntent(intent)
         messages.forEach {
@@ -38,14 +37,9 @@ class SmsReceiver : BroadcastReceiver() {
             val subject = it.pseudoSubject
             val body = it.messageBody
             val date = it.timestampMillis
-            val threadID = if (isMarshmallowPlus()) {
+            val threadId = context.getThreadId(address)
-                Telephony.Threads.getOrCreateThreadId(context, address)
+            context.insertNewSMS(address, subject, body, date, threadId)
-            } else {
+            showNotification(context, address, body, threadId.toInt())
-                0
-            }
-
-            context.insertNewSMS(address, subject, body, date, threadID)
-            showNotification(context, address, body, threadID.toInt())
         }
 
         refreshMessages()