MainActivity.kt
package com.cfsuman.composestate
import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.*
import androidx.compose.material.*
import androidx.compose.runtime.Composable
import androidx.compose.runtime.collectAsState
import androidx.compose.runtime.getValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.sp
import com.cfsuman.composestate.ui.theme.ComposeStateTheme
import kotlinx.coroutines.flow.flowOf
class MainActivity : ComponentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
ComposeStateTheme {
Scaffold(
topBar = { TopAppBar(
title = {
Text(text = "Compose - flowOf() flow builder")
}
)},
content = { MainContent() },
backgroundColor = Color(0xFFEDEAE0)
)
}
}
}
}
@Composable
fun MainContent() {
val colorFlow = flowOf("Red","Green","Yellow","Black")
val color by colorFlow
.collectAsState(initial = "Red")
Box(
Modifier.fillMaxSize(),
contentAlignment = Alignment.Center
) {
Text(text = color, fontSize = 40.sp)
}
}
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