open a new ThreadActivity on clicking on a message

app/src/main/AndroidManifest.xml

@@ -31,6 +31,8 @@
 
         <activity android:name=".activities.MainActivity" />
 
+        <activity android:name=".activities.ThreadActivity" />
+
         <activity
             android:name=".activities.SettingsActivity"
             android:label="@string/settings"

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

@@ -17,6 +17,7 @@ import com.simplemobiletools.smsmessenger.BuildConfig
 import com.simplemobiletools.smsmessenger.R
 import com.simplemobiletools.smsmessenger.adapters.MessagesAdapter
 import com.simplemobiletools.smsmessenger.extensions.config
+import com.simplemobiletools.smsmessenger.helpers.THREAD_ID
 import com.simplemobiletools.smsmessenger.models.Message
 import kotlinx.android.synthetic.main.activity_main.*
 
@@ -78,7 +79,10 @@ class MainActivity : SimpleActivity() {
         storeStateVariables()
         val messages = getMessages()
         MessagesAdapter(this, messages, messages_list, messages_fastscroller) {
-
+            Intent(this, ThreadActivity::class.java).apply {
+                putExtra(THREAD_ID, (it as Message).thread)
+                startActivity(this)
+            }
         }.apply {
             messages_list.adapter = this
         }

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

@@ -0,0 +1,14 @@
+package com.simplemobiletools.smsmessenger.activities
+
+import android.os.Bundle
+import com.simplemobiletools.smsmessenger.R
+import com.simplemobiletools.smsmessenger.helpers.THREAD_ID
+
+class ThreadActivity : SimpleActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_thread)
+        val threadID = intent.getIntExtra(THREAD_ID, 0)
+    }
+}

app/src/main/kotlin/com/simplemobiletools/smsmessenger/helpers/Constants.kt

@@ -0,0 +1,3 @@
+package com.simplemobiletools.smsmessenger.helpers
+
+const val THREAD_ID = "thread_id"

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

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/thread_holder"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
+
+</RelativeLayout>