MainActivity.kt
package com.cfsuman.jetpackcompose
import android.content.Context
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Toast
import androidx.activity.compose.setContent
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.*
import androidx.compose.material.*
import androidx.compose.runtime.*
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
GetScaffold()
}
}
@Composable
fun GetScaffold(){
Scaffold(
topBar = {TopAppBar(
title = {Text(
"Compose - Get Context",
color = Color.White)},
backgroundColor = Color(0xFF333399)) },
content = { MainContent()}
)
}
@Composable
fun MainContent(){
val context = LocalContext.current
Box(
Modifier.fillMaxSize().background(Color(0xFFEDEAE0)),
contentAlignment = Alignment.Center,
){
Row(
horizontalArrangement = Arrangement.spacedBy(10.dp)
) {
Button(onClick = {
Toast.makeText(
context,
"I am a toast message",
Toast.LENGTH_SHORT
).show()
}) {
Text(text = "Show Toast")
}
Button(onClick = {
//showToastMessage("Another toast message")
context.showToastMessage("Another toast message")
}) {
Text(text = "Show Another Toast")
}
}
}
}
@Preview
@Composable
fun ComposablePreview(){
//MainContent()
}
}
// extension function to show toast message
fun Context.showToastMessage(message:String){
Toast.makeText(this, message, Toast.LENGTH_SHORT).show()
}
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