Try It Yourself - SyntaxStudy Editor

HTML / CSS / JS

// build.gradle.kts (app module)
// android { buildFeatures { viewBinding = true } }

// MainActivity.kt
import android.os.Bundle
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import androidx.lifecycle.lifecycleScope
import kotlinx.coroutines.launch
import com.example.app.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {

private lateinit var binding: ActivityMainBinding

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)

binding.btnGreet.setOnClickListener {
            val name = binding.etName.text.toString().trim()
            if (name.isEmpty()) {
                Toast.makeText(this, "Enter a name", Toast.LENGTH_SHORT).show()
                return@setOnClickListener
            }
            binding.tvResult.text = "Hello, $name!"
        }

// Coroutine tied to Activity lifecycle
        lifecycleScope.launch {
            val data = fetchDataSuspend()
            binding.tvResult.text = data
        }
    }

private suspend fun fetchDataSuspend(): String {
        kotlinx.coroutines.delay(1000)
        return "Data loaded!"
    }
}