use an AutocompleteTextView at the ThreadActivity

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

@@ -9,20 +9,22 @@ import android.view.Gravity
 import android.view.Menu
 import android.view.MenuItem
 import android.view.View
+import android.view.inputmethod.EditorInfo
 import android.widget.LinearLayout
 import android.widget.RelativeLayout
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.ensureBackgroundThread
 import com.simplemobiletools.smsmessenger.R
+import com.simplemobiletools.smsmessenger.adapters.AutoCompleteTextViewAdapter
 import com.simplemobiletools.smsmessenger.adapters.ThreadAdapter
-import com.simplemobiletools.smsmessenger.extensions.config
-import com.simplemobiletools.smsmessenger.extensions.getMessages
-import com.simplemobiletools.smsmessenger.extensions.getThreadInfo
-import com.simplemobiletools.smsmessenger.extensions.markSMSRead
+import com.simplemobiletools.smsmessenger.extensions.*
 import com.simplemobiletools.smsmessenger.helpers.*
 import com.simplemobiletools.smsmessenger.models.*
 import com.simplemobiletools.smsmessenger.receivers.SmsSentReceiver
+import kotlinx.android.synthetic.main.activity_new_message.*
 import kotlinx.android.synthetic.main.activity_thread.*
+import kotlinx.android.synthetic.main.activity_thread.new_message_to
+import kotlinx.android.synthetic.main.activity_thread.selected_contacts
 import kotlinx.android.synthetic.main.item_selected_contact.view.*
 import org.greenrobot.eventbus.EventBus
 import org.greenrobot.eventbus.Subscribe
@@ -100,6 +102,19 @@ class ThreadActivity : SimpleActivity() {
             val adapter = ThreadAdapter(this, items, thread_messages_list, thread_messages_fastscroller) {}
             thread_messages_list.adapter = adapter
         }
+
+        getAvailableContacts {
+            runOnUiThread {
+                val adapter = AutoCompleteTextViewAdapter(this, it)
+                new_message_to.setAdapter(adapter)
+                new_message_to.imeOptions = EditorInfo.IME_ACTION_NEXT
+                new_message_to.setOnItemClickListener { parent, view, position, id ->
+                    val currContacts = (new_message_to.adapter as AutoCompleteTextViewAdapter).resultList
+                    val selectedContact = currContacts[position]
+                    addSelectedContact(selectedContact)
+                }
+            }
+        }
     }
 
     private fun setupButtons() {
@@ -133,6 +148,8 @@ class ThreadActivity : SimpleActivity() {
     private fun addPerson() {
         showSelectedContacts()
         thread_add_contacts.beVisible()
+        new_message_to.requestFocus()
+        showKeyboard(new_message_to)
     }
 
     private fun showSelectedContacts() {

app/src/main/kotlin/com/simplemobiletools/smsmessenger/adapters/AutoCompleteTextViewAdapter.kt

@@ -0,0 +1,82 @@
+package com.simplemobiletools.smsmessenger.adapters
+
+import android.graphics.drawable.LayerDrawable
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ArrayAdapter
+import android.widget.Filter
+import com.simplemobiletools.commons.extensions.applyColorFilter
+import com.simplemobiletools.commons.extensions.normalizeString
+import com.simplemobiletools.smsmessenger.R
+import com.simplemobiletools.smsmessenger.activities.SimpleActivity
+import com.simplemobiletools.smsmessenger.extensions.config
+import com.simplemobiletools.smsmessenger.models.Contact
+import kotlinx.android.synthetic.main.item_contact.view.*
+
+class AutoCompleteTextViewAdapter(val activity: SimpleActivity, val contacts: ArrayList<Contact>) :
+    ArrayAdapter<Contact>(activity, 0, contacts) {
+    var resultList = ArrayList<Contact>()
+    private var placeholder = activity.resources.getDrawable(R.drawable.contact_circular_background)
+
+    init {
+        (placeholder as LayerDrawable).findDrawableByLayerId(R.id.attendee_circular_background)
+            .applyColorFilter(activity.config.primaryColor)
+    }
+
+    override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
+        val contact = resultList[position]
+        var listItem = convertView
+        if (listItem == null || listItem.tag != contact.name.isNotEmpty()) {
+            listItem = LayoutInflater.from(activity).inflate(R.layout.item_contact, parent, false)
+        }
+
+        listItem!!.apply {
+            tag = contact.name.isNotEmpty()
+            item_autocomplete_name.text = contact.name
+            item_autocomplete_number.text = contact.phoneNumber
+
+            contact.updateImage(context, item_autocomplete_image, placeholder)
+        }
+
+        return listItem
+    }
+
+    override fun getFilter() = object : Filter() {
+        override fun performFiltering(constraint: CharSequence?): FilterResults {
+            val filterResults = FilterResults()
+            if (constraint != null) {
+                resultList.clear()
+                val searchString = constraint.toString().normalizeString()
+                contacts.forEach {
+                    if (it.phoneNumber.contains(searchString, true) || it.name.contains(searchString, true)) {
+                        resultList.add(it)
+                    }
+                }
+
+                resultList.sortWith(compareBy<Contact>
+                { it.name.startsWith(searchString, true) }.thenBy
+                { it.name.contains(searchString, true) })
+                resultList.reverse()
+
+                filterResults.values = resultList
+                filterResults.count = resultList.size
+            }
+            return filterResults
+        }
+
+        override fun publishResults(constraint: CharSequence?, results: FilterResults?) {
+            if (results?.count ?: -1 > 0) {
+                notifyDataSetChanged()
+            } else {
+                notifyDataSetInvalidated()
+            }
+        }
+
+        override fun convertResultToString(resultValue: Any?) = (resultValue as? Contact)?.name
+    }
+
+    override fun getItem(index: Int) = resultList[index]
+
+    override fun getCount() = resultList.size
+}

app/src/main/res/drawable/contact_circular_background.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:id="@+id/attendee_circular_background">
+        <shape android:shape="oval">
+            <solid android:color="@color/color_primary" />
+        </shape>
+    </item>
+
+    <item
+        android:bottom="@dimen/medium_margin"
+        android:drawable="@drawable/ic_person_vector"
+        android:left="@dimen/medium_margin"
+        android:right="@dimen/medium_margin"
+        android:top="@dimen/medium_margin" />
+
+</layer-list>