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.fillMaxWidth modifier maximally expands View in horizontal direction (width).
Syntax
.fillMaxWidth()
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MainActivity.kt
package com.example.testcompose
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.compose.foundation.Text
import androidx.compose.foundation.border
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.platform.setContent
import androidx.compose.ui.unit.dp
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
Box(Modifier.fillMaxWidth().height(100.dp).border(10.dp, Color.Magenta)) {
Text(
text = "Text",
modifier = Modifier.align(Alignment.Center).border(2.dp, Color.Red)
)
}
}
}
}
Output
