Kotlin

Steps create button in layout/activity_main.xml create strings on button in values/strings.xml connect button and set event in MainActivity.kt padding and margin 1. create button in layout/activity_main.xml <Button android:id="@+id/button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margin="10dp" android:padding="10dp" android:text="@string/btn" android:textColor="@color/black" app:backgroundTint="@color/white" /> 2. create strings on button in values/strings.xml <string name="btn">Button</string> 3. connect button and set event in MainActivity.kt import android.widget.Button class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) // set id from activity_main.