adding Settings and About sections

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

@@ -1,8 +1,12 @@
 package com.simplemobiletools.smsmessenger.activities
 
+import android.content.Intent
 import android.os.Bundle
+import android.view.Menu
+import android.view.MenuItem
 import com.simplemobiletools.commons.extensions.appLaunched
 import com.simplemobiletools.commons.extensions.checkAppSideloading
+import com.simplemobiletools.commons.models.FAQItem
 import com.simplemobiletools.smsmessenger.BuildConfig
 import com.simplemobiletools.smsmessenger.R
 
@@ -17,4 +21,33 @@ class MainActivity : SimpleActivity() {
             return
         }
     }
+
+    override fun onCreateOptionsMenu(menu: Menu): Boolean {
+        menuInflater.inflate(R.menu.menu, menu)
+        return true
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        when (item.itemId) {
+            R.id.settings -> launchSettings()
+            R.id.about -> launchAbout()
+            else -> return super.onOptionsItemSelected(item)
+        }
+        return true
+    }
+
+    private fun launchSettings() {
+        startActivity(Intent(applicationContext, SettingsActivity::class.java))
+    }
+
+    private fun launchAbout() {
+        val licenses = 0
+
+        val faqItems = arrayListOf(
+            FAQItem(R.string.faq_2_title_commons, R.string.faq_2_text_commons),
+            FAQItem(R.string.faq_6_title_commons, R.string.faq_6_text_commons)
+        )
+
+        startAboutActivity(R.string.app_name, licenses, BuildConfig.VERSION_NAME, faqItems, true)
+    }
 }

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

@@ -0,0 +1,59 @@
+package com.simplemobiletools.smsmessenger.activities
+
+import android.os.Bundle
+import com.simplemobiletools.commons.dialogs.ChangeDateTimeFormatDialog
+import com.simplemobiletools.commons.extensions.beVisibleIf
+import com.simplemobiletools.commons.extensions.isThankYouInstalled
+import com.simplemobiletools.commons.extensions.launchPurchaseThankYouIntent
+import com.simplemobiletools.commons.extensions.updateTextColors
+import com.simplemobiletools.smsmessenger.R
+import com.simplemobiletools.smsmessenger.extensions.config
+import kotlinx.android.synthetic.main.activity_settings.*
+import java.util.*
+
+class SettingsActivity : SimpleActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_settings)
+    }
+
+    override fun onResume() {
+        super.onResume()
+
+        setupPurchaseThankYou()
+        setupCustomizeColors()
+        setupUseEnglish()
+        setupChangeDateTimeFormat()
+        updateTextColors(settings_scrollview)
+    }
+
+    private fun setupPurchaseThankYou() {
+        settings_purchase_thank_you_holder.beVisibleIf(!isThankYouInstalled())
+        settings_purchase_thank_you_holder.setOnClickListener {
+            launchPurchaseThankYouIntent()
+        }
+    }
+
+    private fun setupCustomizeColors() {
+        settings_customize_colors_holder.setOnClickListener {
+            startCustomizationActivity()
+        }
+    }
+
+    private fun setupUseEnglish() {
+        settings_use_english_holder.beVisibleIf(config.wasUseEnglishToggled || Locale.getDefault().language != "en")
+        settings_use_english.isChecked = config.useEnglish
+        settings_use_english_holder.setOnClickListener {
+            settings_use_english.toggle()
+            config.useEnglish = settings_use_english.isChecked
+            System.exit(0)
+        }
+    }
+
+    private fun setupChangeDateTimeFormat() {
+        settings_change_date_time_format_holder.setOnClickListener {
+            ChangeDateTimeFormatDialog(this) {}
+        }
+    }
+}