adding some base activities

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

@@ -0,0 +1,52 @@
+package com.simplemobiletools.launcher.activities
+
+import android.content.Intent
+import android.os.Bundle
+import com.simplemobiletools.commons.extensions.appLaunched
+import com.simplemobiletools.commons.extensions.hideKeyboard
+import com.simplemobiletools.commons.models.FAQItem
+import com.simplemobiletools.launcher.BuildConfig
+import com.simplemobiletools.launcher.R
+import kotlinx.android.synthetic.main.activity_main.*
+
+class MainActivity : SimpleActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+        appLaunched(BuildConfig.APPLICATION_ID)
+        setupOptionsMenu()
+    }
+
+    override fun onResume() {
+        super.onResume()
+        setupToolbar(main_toolbar)
+    }
+
+    private fun setupOptionsMenu() {
+        main_toolbar.setOnMenuItemClickListener { menuItem ->
+            when (menuItem.itemId) {
+                R.id.settings -> launchSettings()
+                R.id.about -> launchAbout()
+                else -> return@setOnMenuItemClickListener false
+            }
+            return@setOnMenuItemClickListener true
+        }
+    }
+
+    private fun launchSettings() {
+        hideKeyboard()
+        startActivity(Intent(applicationContext, SettingsActivity::class.java))
+    }
+
+    private fun launchAbout() {
+        val licenses = 0L
+        val faqItems = ArrayList<FAQItem>()
+
+        if (!resources.getBoolean(R.bool.hide_google_relations)) {
+            faqItems.add(FAQItem(R.string.faq_2_title_commons, R.string.faq_2_text_commons))
+            faqItems.add(FAQItem(R.string.faq_6_title_commons, R.string.faq_6_text_commons))
+        }
+
+        startAboutActivity(R.string.app_name, licenses, BuildConfig.VERSION_NAME, faqItems, true)
+    }
+}