add Settings activity

app/src/main/AndroidManifest.xml

@@ -26,5 +26,10 @@
             android:name=".activities.LicenseActivity"
             android:label="@string/third_party_licences"
             android:parentActivityName=".activities.AboutActivity"/>
+
+        <activity
+            android:name=".activities.SettingsActivity"
+            android:label="@string/settings"
+            android:parentActivityName=".activities.MainActivity"/>
     </application>
 </manifest>

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

@@ -23,6 +23,10 @@ class MainActivity : AppCompatActivity() {
 
     override fun onOptionsItemSelected(item: MenuItem?): Boolean {
         when (item?.itemId) {
+            R.id.settings -> {
+                startActivity(Intent(applicationContext, SettingsActivity::class.java))
+                return true
+            }
             R.id.about -> {
                 startActivity(Intent(applicationContext, AboutActivity::class.java))
                 return true

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

@@ -0,0 +1,13 @@
+package com.simplemobiletools.applauncher.activities
+
+import android.os.Bundle
+import android.support.v7.app.AppCompatActivity
+import com.simplemobiletools.applauncher.R
+
+class SettingsActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_settings)
+    }
+}

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

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView
+    android:id="@+id/settings_scrollview"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
+
+    <LinearLayout
+        android:id="@+id/settings_holder"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+
+        <RelativeLayout
+            android:id="@+id/settings_dark_theme_holder"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/settings_padding"
+            android:background="?android:attr/selectableItemBackground"
+            android:padding="@dimen/activity_margin">
+
+            <TextView
+                android:id="@+id/settings_dark_theme_label"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_centerVertical="true"
+                android:paddingLeft="@dimen/settings_padding"
+                android:text="@string/dark_theme"/>
+
+            <android.support.v7.widget.SwitchCompat
+                android:id="@+id/settings_dark_theme"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_alignParentRight="true"
+                android:background="@null"
+                android:clickable="false"/>
+
+        </RelativeLayout>
+    </LinearLayout>
+</ScrollView>

app/src/main/res/menu/menu.xml

@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
       xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/settings"
+        android:title="@string/settings"
+        app:showAsAction="never"/>
     <item
         android:id="@+id/about"
         android:title="@string/about"

app/src/main/res/values/dimens.xml

@@ -2,4 +2,5 @@
     <dimen name="activity_margin">16dp</dimen>
     <dimen name="social_padding">8dp</dimen>
     <dimen name="social_logo">40dp</dimen>
+    <dimen name="settings_padding">8dp</dimen>
 </resources>