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| package com.example.testcompose
import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.material3.Button
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Surface
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.font.FontStyle
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.sp
import com.example.testcompose.ui.theme.TestComposeTheme
class HelloActivity : ComponentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
TestComposeTheme {
Surface(
modifier = Modifier.fillMaxSize(),
color = MaterialTheme.colorScheme.background
) {
Column {
textDemo("Hello World !!!", 20f)
buttonDemo()
}
}
}
}
}
@Composable
fun textDemo(msg: String, fontSize: Float) {
Text(
text = msg,
fontSize = fontSize.sp,
fontWeight = FontWeight.Bold
)
Text(
text = msg,
color = Color.Red,
fontSize = 24.sp,
fontStyle = FontStyle.Normal,
fontWeight = FontWeight.W700
)
}
@Composable
fun buttonDemo() {
var isToggle by remember { mutableStateOf(true) }
Button(
onClick = { isToggle = !isToggle },
) {
Text(
text = if (isToggle) "我是一个按钮" else "我不是"
)
}
}
}
|