Elevation in Material Design gives appropriate shadows for your UI element. In this Jetpack Compose tutorial, let’s learn how to add elevation to a button in Android.
Button composable allows you to add a button and its elevation parameter helps you to add elevation. See the code snippet given below.
@Composable
fun ElevatedButton() {
Column {
Button(onClick = { /*TODO*/ }, elevation = ButtonDefaults.elevation(
defaultElevation = 20.dp,
pressedElevation = 15.dp,
disabledElevation = 0.dp,
hoveredElevation = 15.dp,
focusedElevation = 10.dp
)) {
Text("Button with Elevation")
}
}
}You can customize elevation for different states of the button. The complete code is given below.
package com.example.example
import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.material.*
import androidx.compose.runtime.*
import androidx.compose.ui.Modifier
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import com.example.example.ui.theme.ExampleTheme
class MainActivity : ComponentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
ExampleTheme {
// A surface container using the 'background' color from the theme
Surface(
modifier = Modifier.fillMaxSize(),
color = MaterialTheme.colors.background
) {
ElevatedButton()
}
}
}
}
}
@Preview(showBackground = true)
@Composable
fun ElevatedButton() {
Column {
Button(onClick = { /*TODO*/ }, elevation = ButtonDefaults.elevation(
defaultElevation = 20.dp,
pressedElevation = 15.dp,
disabledElevation = 0.dp,
hoveredElevation = 15.dp,
focusedElevation = 10.dp
)) {
Text("Button with Elevation")
}
}
}
@Preview(showBackground = true)
@Composable
fun DefaultPreview() {
ExampleTheme {
ElevatedButton()
}
}That’s how you add elevation or shadows to the button in Jetpack Compose.
