使用jetpack compose 监听android底部导航栏的显示与隐藏

在 Jetpack Compose 中监听 Android 底部导航栏的显示与隐藏可以通过使用系统UI控制器实现。以下是一个简单的示例代码：

import android.view.View
import androidx.activity.ComponentActivity
import androidx.activity.OnBackPressedDispatcher
import androidx.compose.runtime.*
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.platform.LocalView
import androidx.compose.ui.platform.LocalViewCompositionStrategy
import androidx.compose.ui.platform.ViewCompositionStrategy
import androidx.core.view.ViewCompat
import androidx.core.view.WindowInsetsCompat

@Composable
fun BottomNavBarVisibilityListener(
    onBottomNavBarVisibilityChanged: (Boolean) -> Unit
) {
    val context = LocalContext.current
    val view = LocalView.current

    DisposableEffect(key1 = view) {
        val activity = context as ComponentActivity
        val onApplyWindowInsetsListener = ViewCompat.OnApplyWindowInsetsListener { _, insets ->
            val isVisible = insets.isVisible(WindowInsetsCompat.Type.navigationBars())
            onBottomNavBarVisibilityChanged(isVisible)
            insets
        }
        ViewCompat.setOnApplyWindowInsetsListener(view, onApplyWindowInsetsListener)

        val onDestory = {
            ViewCompat.setOnApplyWindowInsetsListener(view, null)
        }

        onDispose { onDestory() }
    }
}

在你的 Composable 中使用 BottomNavBarVisibilityListener：

@Composable
fun MyScreen() {
    var isBottomNavBarVisible by remember { mutableStateOf(true) }

    BottomNavBarVisibilityListener { isVisible ->
        isBottomNavBarVisible = isVisible
    }

    // 在这里根据isBottomNavBarVisible的值显示/隐藏底部导航栏
}

通过这种方式，你可以监听底部导航栏的显示与隐藏，并在 Composable 中相应地处理逻辑。