Android Jetpack Compose - Button
16lz
2021-01-23
简单示例
@Composablefun Button( text: String, modifier: Modifier = Modifier.None, onClick: (() -> Unit)? = null, style: ButtonStyle = ContainedButtonStyle()) { Button(modifier = modifier, style = style, onClick = onClick) { Text(text = text) }}例如：
@Preview@Composablefun buttonLayout() { Button(text = "点击", onClick = { // 处理点击事件 } )}或者传入可组合children来代替text属性
@Composablefun Button( modifier: Modifier = Modifier.None, onClick: (() -> Unit)? = null, style: ButtonStyle = ContainedButtonStyle(), children: @Composable() () -> Unit)例如：
@Preview@Composablefun btLayout(){ Button( onClick = { // 处理点击事件 },children = { Text(text = "点击") } )}按钮样式
- ContainedButtonStyle 默认样式
- TextButtonStyle 文本样式
- OutlinedButtonStyle 轮廓样式
@Preview@Composablefun btLayout() { MaterialTheme { Column( ) { TopAppBar(title = { Text("Compose演示") }) val (text, setText) = state { "点击" } Container( width = Dp(200.0f), height = Dp(40.0f) ) { Button( onClick = { // 处理点击事件x setText("TextButtonStyle") //文字按钮 }, children = { Text(text = text) }, style = TextButtonStyle(contentColor = Color.Magenta) ) } Container( width = Dp(200.0f), height = Dp(40.0f) ) { Button( onClick = { }, children = { Text(text = "ContainedButtonStyle") }, style = ContainedButtonStyle( backgroundColor = Color.Cyan, contentColor = Color.DarkGray, // 圆角 shape = RoundedCornerShape(8.dp), elevation = Dp(4f) ) ) } Container( width = Dp(200.0f), height = Dp(40.0f) ) { Button( onClick = { }, children = { Text(text = "ContainedButtonStyle") }, style = OutlinedButtonStyle( backgroundColor = Color.Black, contentColor = Color.Cyan, // 边框颜色 borderBrush = SolidColor(Color.Red), // 边款宽度 borderWidth = Dp(4f), elevation = Dp(4f) ) ) } } }}更多相关文章
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