Build A Simple Android App With Kotlin <PLUS>

class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val myButton: Button = findViewById(R.id.myButton) val myText: TextView = findViewById(R.id.textView) myButton.setOnClickListener { myText.text = "Hello, Kotlin!" } } } Use code with caution. Copied to clipboard 6. Running and Debugging : Click the Green Hammer icon to compile. Run : Click the Green Play icon to launch on the emulator.

: Android Studio typically includes this, but ensure version 11 or 17 is active. Build A Simple Android App With Kotlin

Android uses (Extensible Markup Language) to define layouts. The most flexible layout is the ConstraintLayout . Example: A Simple Button and Text In activity_main.xml , you might define: TextView : To display a greeting. Button : To trigger an action. Run : Click the Green Play icon to launch on the emulator

: Choose API 24 (Android 7.0) or higher to ensure compatibility with 90%+ of devices. The most flexible layout is the ConstraintLayout

: Defines app permissions and essential components. 4. Designing the User Interface (UI)