implementing the Manage People menu button at the conversation screen

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

@@ -84,7 +84,6 @@ class ThreadActivity : SimpleActivity() {
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
         menuInflater.inflate(R.menu.menu_thread, menu)
         menu.apply {
-            findItem(R.id.manage_people).isVisible = false
             findItem(R.id.delete).isVisible = threadItems.isNotEmpty()
         }
 
@@ -128,6 +127,7 @@ class ThreadActivity : SimpleActivity() {
     private fun setupButtons() {
         thread_type_message.setColors(config.textColor, config.primaryColor, config.backgroundColor)
         thread_send_message.applyColorFilter(config.textColor)
+        confirm_manage_contacts.applyColorFilter(config.textColor)
 
         thread_send_message.setOnClickListener {
             val msg = thread_type_message.value
@@ -151,6 +151,19 @@ class ThreadActivity : SimpleActivity() {
             thread_send_message.isClickable = it.isNotEmpty()
             thread_send_message.alpha = if (it.isEmpty()) 0.4f else 0.9f
         }
+
+        confirm_manage_contacts.setOnClickListener {
+            hideKeyboard()
+            thread_add_contacts.beGone()
+
+            val numbers = selectedContacts.map { it.phoneNumber }.toSet()
+            val threadId = getThreadId(numbers).toInt()
+            Intent(this, ThreadActivity::class.java).apply {
+                putExtra(THREAD_ID, threadId)
+                addFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP)
+                startActivity(this)
+            }
+        }
     }
 
     private fun blockNumber() {
@@ -259,8 +272,9 @@ class ThreadActivity : SimpleActivity() {
         newLinearLayout.orientation = LinearLayout.HORIZONTAL
 
         val sideMargin = (selected_contacts.layoutParams as RelativeLayout.LayoutParams).leftMargin
-        val parentWidth = realScreenSize.x - sideMargin * 2
         val mediumMargin = resources.getDimension(R.dimen.medium_margin).toInt()
+        val parentWidth = realScreenSize.x - sideMargin * 2
+        val firstRowWidth = parentWidth - resources.getDimension(R.dimen.normal_icon_size).toInt() + sideMargin / 2
         var widthSoFar = 0
         var isFirstRow = true
         for (i in views.indices) {
@@ -276,7 +290,8 @@ class ThreadActivity : SimpleActivity() {
             LL.measure(0, 0)
             widthSoFar += views[i].measuredWidth + mediumMargin
 
-            if (widthSoFar >= parentWidth) {
+            val checkWidth = if (isFirstRow) firstRowWidth else parentWidth
+            if (widthSoFar >= checkWidth) {
                 isFirstRow = false
                 selected_contacts.addView(newLinearLayout)
                 newLinearLayout = LinearLayout(this)

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

@@ -472,6 +472,15 @@ fun Context.getThreadId(address: String): Long {
     }
 }
 
+@SuppressLint("NewApi")
+fun Context.getThreadId(addresses: Set<String>): Long {
+    return if (isMarshmallowPlus()) {
+        Telephony.Threads.getOrCreateThreadId(this, addresses)
+    } else {
+        0
+    }
+}
+
 fun Context.isNumberBlocked(number: String): Boolean {
     val blockedNumbers = getBlockedNumbers()
     val numberToCompare = number.trimToComparableNumber()

app/src/main/res/layout/activity_thread.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/thread_holder"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
@@ -10,7 +11,8 @@
         android:id="@+id/thread_add_contacts"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:visibility="gone">
+        android:visibility="gone"
+        tools:visibility="visible">
 
         <LinearLayout
             android:id="@+id/selected_contacts"
@@ -19,6 +21,18 @@
             android:layout_margin="@dimen/activity_margin"
             android:orientation="vertical" />
 
+        <ImageView
+            android:id="@+id/confirm_manage_contacts"
+            android:layout_width="@dimen/normal_icon_size"
+            android:layout_height="@dimen/normal_icon_size"
+            android:layout_alignParentEnd="true"
+            android:layout_marginStart="@dimen/medium_margin"
+            android:layout_marginTop="@dimen/normal_margin"
+            android:layout_marginEnd="@dimen/medium_margin"
+            android:background="?selectableItemBackgroundBorderless"
+            android:padding="@dimen/small_margin"
+            android:src="@drawable/ic_check_vector" />
+
         <View
             android:id="@+id/message_divider_one"
             android:layout_width="match_parent"