android - Match Width of Parent in Column (Jetpack Compose)

Question

By default, Column {} has the width of it's largest child element. How can I make all other elements to fit the width of the parent Column? If I use Modifier.fillMaxWidth() the elements will take up the entire available space and make the parent Column larger. How can I achieve the same behavior like a Modifier.matchParentWidth() Modifier would provide?

question from:https://stackoverflow.com/questions/65942711/match-width-of-parent-in-column-jetpack-compose

Answer 1

Here I'm using Modifier.fillMaxWidth and the items doesn't make parent column larger :

@Composable
fun Demo() {
Column(modifier = Modifier.width(300
    .dp)) {
    Text(text = "with fillMaxWidth modifier",modifier = Modifier.fillMaxWidth().background(Color.Red))
    Text(text = "without fillMaxWidth modifier",modifier = Modifier.background(Color.Gray))
 }

}

What I usually do to achieve the matchParentWidth is something like this (It's dirty but gets the job done):

val context = AmbientContext.current.resources
val displayMetrics = context.displayMetrics
val scrWidth = displayMetrics.widthPixels / displayMetrics.density

Column(modifier = Modifier.width(300
    .dp)) {
    Text(text = "with fillMaxWidth modifier",modifier = Modifier.fillMaxWidth().background(Color.Red))
    Text(text = "without fillMaxWidth modifier",modifier = Modifier
        .preferredWidth(scrWidth.dp)
        .background(Color.Gray))
}