カテゴリー:
Compose を用いた Android アプリ開発の基礎 ／ ユニット 1: 初めての Android アプリ
閲覧数:10 配信日:2024-10-23 12:55
完成した MainActivity.kt:
package com.example.happybirthday
import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Surface
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import com.example.happybirthday.ui.theme.HappyBirthdayTheme
class MainActivity : ComponentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
HappyBirthdayTheme {
// A surface container using the 'background' color from the theme
Surface(
modifier = Modifier.fillMaxSize(),
color = MaterialTheme.colorScheme.background
) {
GreetingText(
message = "Happy Birthday Sam!",
from = "From Emma",
modifier = Modifier.padding(8.dp)
)
}
}
}
}
}
@Composable
fun GreetingText(message: String, from: String, modifier: Modifier = Modifier) {
Column(
verticalArrangement = Arrangement.Center,
modifier = modifier
) {
Text(
text = message,
fontSize = 100.sp,
lineHeight = 116.sp,
textAlign = TextAlign.Center
)
Text(
text = from,
fontSize = 36.sp,
modifier = Modifier
.padding(16.dp)
.align(alignment = Alignment.End)
)
}
}
@Preview(showBackground = true)
@Composable
fun BirthdayCardPreview() {
HappyBirthdayTheme {
GreetingText(message = "Happy Birthday Sam!", from = "From Emma")
}
}