左右が角丸になるボタン

RoundIconButton.kt

import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material.Button
import androidx.compose.material.Icon
import androidx.compose.material.Text
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.Search
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.painter.Painter
import androidx.compose.ui.graphics.vector.rememberVectorPainter
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.tooling.preview.PreviewParameter
import androidx.compose.ui.tooling.preview.PreviewParameterProvider
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp

@Composable
fun RoundIconButton(
    modifier: Modifier = Modifier,
    painter: Painter,
    text: String,
    onClick: () -> Unit,
) {
    Button(
        modifier = modifier,
        shape = RoundedCornerShape(100),
        onClick = onClick
    ) {
        Row(
            verticalAlignment = Alignment.CenterVertically,
        ) {
            Icon(
                painter = painter,
                contentDescription = "post"
            )
            Text(
                modifier = Modifier.padding(start = 6.dp),
                text = text,
            )
        }
    }
}

class PreviewSizeProvider : PreviewParameterProvider<Pair<Dp, Dp>> {
    override val values: Sequence<Pair<Dp, Dp>>
        get() = sequenceOf(
            Pair(100.dp, 150.dp),
            Pair(150.dp, 100.dp),
            Pair(150.dp, 150.dp),
        )
}

@Preview
@Composable
fun PreviewPostButton(
    @PreviewParameter(PreviewSizeProvider::class) size: Pair<Dp, Dp>,
) {
    Column {
        RoundIconButton(
            modifier = Modifier.size(width = size.first, height = size.second),
            painter = rememberVectorPainter(Icons.Filled.Search),
            text = "角丸ボタン",
        ) {}
    }
}

こんな感じになる