compose
Google 文档 在应用或模块的 build.gradle 文件中添加所需工件的依赖项：
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android {
buildFeatures {
compose true
}
composeOptions {
kotlinCompilerVersion "1.4.30"
kotlinCompilerExtensionVersion "1.0.0-beta01"
}
}
tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).configureEach {
kotlinOptions {
jvmTarget = "1.8"
}
}
Compose中添加AndroidView
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@Composable
fun CustomView() {
val selectedItem = remember { mutableStateOf(0) }
// Adds view to Compose
AndroidView(
modifier = Modifier.fillMaxSize(), // Occupy the max size in the Compose UI tree
viewBlock = { context ->
// Creates custom view
CustomView(context).apply {
// Sets up listeners for View -> Compose communication
myView.setOnClickListener {
selectedItem.value = 1
}
}
},
update = { view ->
// View's been inflated or state read in this block has been updated
// Add logic here if necessary
// As selectedItem is read here, AndroidView will recompose
// whenever the state changes
// Example of Compose -> View communication
view.coordinator.selectedItem = selectedItem.value
}
)
}
@Composable
fun ContentExample() {
Column(Modifier.fillMaxSize()) {
Text("Look at this CustomView!")
CustomView()
}
}
错误
var text by remember { mutableStateOf(“123”)} 报错：Type ‘TypeVariable(T)’ has no method ‘getValue(Nothing?, KProperty<>)’ and thus it cannot serve as a delegate 添加 import androidx.compose.runtime.
注意项
如果同一布局中存在多个 ComposeView 元素，每个元素必须具有唯一的 ID 才能使 savedInstanceState 发挥作用。
