MainActivity.kt
package com.cfsuman.jetpackcompose
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.activity.compose.setContent
import androidx.compose.foundation.clickable
import androidx.compose.foundation.layout.*
import androidx.compose.material.*
import androidx.compose.runtime.*
import androidx.compose.ui.graphics.Color
import androidx.compose.material.Text
import androidx.compose.material.TopAppBar
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import androidx.navigation.NavController
import androidx.navigation.NavHostController
import androidx.navigation.compose.NavHost
import androidx.navigation.compose.composable
import androidx.navigation.compose.rememberNavController
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
GetScaffold()
}
}
@Composable
fun GetScaffold(){
val navController:NavHostController = rememberNavController()
Scaffold(
topBar = {
TopAppBar(
title = { Text(
text = "Compose - Navigation Argument"
)},
backgroundColor = Color(0xFFC0E8D5),
)
},
content = {MainContent(navController)},
backgroundColor = Color(0xFFEDEAE0),
)
}
@Composable
fun MainContent(navController: NavHostController){
Box(
modifier = Modifier.fillMaxSize(),
){
MainNavigation(navController)
}
}
@Composable
fun MainNavigation(navController: NavHostController){
NavHost(
navController = navController,
startDestination = "listScreen"
){
composable("listScreen"){ListScreen(navController)}
composable("detailsScreen/{colorName}"
){ backStackEntry ->
DetailsScreen(
backStackEntry.arguments?.getString("colorName")
)
}
}
}
@Composable
fun ListScreen(navController: NavController){
val list = listOf("Red","Green","Blue","Yellow","Black")
Column(
modifier = Modifier
.fillMaxWidth()
.padding(4.dp),
verticalArrangement = Arrangement.spacedBy(4.dp),
horizontalAlignment = Alignment.Start
) {
Text(
text = "List Screen",
style = MaterialTheme.typography.h4,
modifier = Modifier.padding(bottom = 24.dp)
)
list.forEach {
Card(
modifier = Modifier
.fillMaxWidth()
.padding(1.dp)
.height(50.dp)
.clickable {
navController.navigate("detailsScreen/$it")
}
) {
Box(modifier = Modifier
.fillMaxSize()
.wrapContentSize(Alignment.Center)) {
Text(text = it)
}
}
}
}
}
@Composable
fun DetailsScreen(colorName:String?){
Box(
modifier = Modifier.fillMaxSize().padding(4.dp),
contentAlignment = Alignment.Center
) {
Text(
text = "Details Screen\n${colorName?.apply{}}",
style = MaterialTheme.typography.h4,
modifier = Modifier.padding(bottom = 24.dp),
textAlign = TextAlign.Center
)
}
}
}
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