Create FirstStartupActivity

app/src/main/java/com/finnmglas/launcher/FirstStartupActivity.kt

@@ -0,0 +1,35 @@
+package com.finnmglas.launcher
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.os.Bundle
+import android.view.*
+import androidx.appcompat.app.AppCompatActivity
+
+class FirstStartupActivity : AppCompatActivity(){
+
+    /* Overrides */
+
+    @SuppressLint("SetTextI18n") // I do not care
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        val sharedPref = this.getSharedPreferences(
+            getString(R.string.preference_file_key), Context.MODE_PRIVATE)
+
+        initSettings(sharedPref, this)
+
+        // Flags
+        window.setFlags(
+            WindowManager.LayoutParams.FLAG_FULLSCREEN,
+            WindowManager.LayoutParams.FLAG_FULLSCREEN
+        )
+        window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+
+        setContentView(R.layout.activity_firststartup)
+    }
+
+    fun clickAnywhere(view: View){
+        finish()
+    }
+}

app/src/main/java/com/finnmglas/launcher/MainActivity.kt

@@ -33,7 +33,7 @@ GestureDetector.OnDoubleTapListener {
     private lateinit var mDetector: GestureDetectorCompat
 
     // get device dimensions
-    val displayMetrics = DisplayMetrics()
+    private val displayMetrics = DisplayMetrics()
 
     private fun getIntent(packageName: String): Intent? {
         val pm = applicationContext.packageManager
@@ -108,7 +108,7 @@ GestureDetector.OnDoubleTapListener {
 
         // First Startup
         if (!sharedPref.getBoolean("startedBefore", false))
-            initSettings(sharedPref, this)
+            startActivity(Intent(this, FirstStartupActivity::class.java))
 
         loadSettings(sharedPref)