Added main activity

app/src/main/java/com/sirekanyan/devtools/MainActivity.kt

@@ -0,0 +1,58 @@
+package com.sirekanyan.devtools
+
+import android.os.Bundle
+import android.widget.LinearLayout
+import androidx.appcompat.app.AppCompatActivity
+import kotlin.reflect.KMutableProperty0
+
+class MainActivity : AppCompatActivity() {
+
+    private val settings by lazy { Settings(contentResolver) }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(
+            scroll {
+                addView(linear {
+                    orientation = LinearLayout.VERTICAL
+                    addView(linear {
+                        addView(text("dev") {
+                            init(adb = 1, font = 1.15f, screen = 120)
+                            recreate()
+                        })
+                        addView(text("reset") {
+                            init(adb = 0, font = 1.0f, screen = 30)
+                            finish()
+                        })
+                    })
+                    switcher(settings::adb, 0, 1)
+                    switcher(settings::dka, 0, 1)
+                    switcher(settings::font, 0.85f, 1.0f, 1.15f, 1.3f)
+                    switcher(settings::screen, 30, 60, 120)
+                })
+            }
+        )
+    }
+
+    private fun init(adb: Int, font: Float, screen: Long) {
+        settings.adb = adb
+        settings.dka = 0
+        settings.font = font
+        settings.screen = screen
+    }
+
+    private fun <T> LinearLayout.switcher(property: KMutableProperty0<T>, vararg values: T) {
+        val currentValue = property.get()
+        addView(linear {
+            orientation = LinearLayout.HORIZONTAL
+            values.forEach { value ->
+                val text = "${property.name} $value"
+                addView(text(if (value == currentValue) "[$text]" else text) {
+                    property.set(value)
+                    recreate()
+                })
+            }
+        })
+    }
+
+}