Botón en Android usando Jetpack Compose

Kotlin

import android.graphics.drawable.shapes.Shape
import android.media.Image
import android.os.Bundle
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import androidx.compose.foundation.BorderStroke
import androidx.compose.foundation.Image
import androidx.compose.foundation.Text
import androidx.compose.foundation.layout.*
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.KeyboardOptions
import androidx.compose.material.*
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.AccountCircle
import androidx.compose.material.icons.filled.Info
import androidx.compose.material.icons.filled.Phone
import androidx.compose.runtime.*
import androidx.compose.runtime.savedinstancestate.savedInstanceState
import androidx.compose.ui.Alignment
import androidx.compose.ui.layout.ContentScale
import androidx.compose.ui.platform.setContent
import androidx.compose.ui.res.imageResource
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import com.example.gfgapp.ui.GFGAppTheme
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.SolidColor
import androidx.compose.ui.platform.ContextAmbient
import androidx.compose.ui.res.colorResource
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.font.FontFamily
import androidx.compose.ui.text.input.*
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.TextUnit
 
class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            GFGAppTheme {
                // A surface container using the 'background'
                  // color from the theme
                Surface(color = MaterialTheme.colors.background) {
                    // at below line we are calling
                      // our function for button.
                    MyButton();
                }
            }
        }
    }
}
 
// @Preview function is use to see preview
// for our composable function in preview section.
@Preview(showBackground = true)
@Composable
fun DefaultPreview() {
    GFGAppTheme {
          // we are passing our composable
        // function to display its preview.
        MyButton();
    }
}
 
@Composable
fun MyButton() {
 
    Column(
            // we are using column to align our
            // imageview to center of the screen.
            modifier = Modifier.fillMaxWidth().fillMaxHeight(),
 
            // below line is used for specifying
            // vertical arrangement.
            verticalArrangement = Arrangement.Center,
 
            // below line is used for specifying
            // horizontal arrangement.
            horizontalAlignment = Alignment.CenterHorizontally,
            ) {
        // below line is use to get
        // the context for our app.
        val context = ContextAmbient.current
 
        // below line is use to create a button.
        Button(
                // below line is use to add onclick
                // parameter for our button onclick
                onClick = {
                    // when user is clicking the button
                    // we are displaying a toast message.
                    Toast.makeText(context, "Welcome to Geeks for Geeks", Toast.LENGTH_LONG).show()
                },
                // in below line we are using modifier
                // which is use to add padding to our button
                modifier = Modifier.padding(all = Dp(10F)),
 
                // below line is use to set or
                // button as enable or disable.
                enabled = true,
 
                // below line is use to
                // add border to our button.
                border = BorderStroke(width = 1.dp, brush = SolidColor(Color.Blue)),
 
                // below line is use to add shape for our button.
                shape = MaterialTheme.shapes.medium,
        )
        // below line is use to
        // add text on our button
        {
            Text(text = "Geeks for Geeks", color = Color.White)
        }
    }
}