在使用 Android Jetpack Compose的 App里创建 SurfaceView和Surface

基本方法是使用AndroidView创建surfaceview，在surfaceHolder的callback里取得surface

@Composable fun SurfaceViewScreen() { val context = LocalContext.current // 用于保存 Surface 引用 var surfaceHolder: SurfaceHolder? by remember { mutableStateOf(null) } AndroidView( factory = { ctx -> SurfaceView(ctx).apply { // 设置全屏布局参数 layoutParams = ViewGroup.LayoutParams( ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT ) // 添加 SurfaceHolder 回调 holder.addCallback(object : SurfaceHolder.Callback { override fun surfaceCreated(holder: SurfaceHolder) { // Surface 创建时获取 Surface surfaceHolder = holder val surface = holder.surface if(surface?.isValid == true){ println("surface is valid") } // 在这里可以开始使用 Surface startDrawingOnSurface(surface) println("Surface created: $surface") } override fun surfaceChanged( holder: SurfaceHolder, format: Int, width: Int, height: Int ) { println("Surface changed: $width x $height") } override fun surfaceDestroyed(holder: SurfaceHolder) { // 清理资源 surfaceHolder = null println("Surface destroyed") } }) } }, modifier = Modifier.fillMaxSize() ) } // 在 Surface 上绘制的示例函数 private fun startDrawingOnSurface(surface: android.view.Surface) { // 在后台线程进行绘制 Thread { try { val canvas = surface.lockCanvas(null) try { // 绘制红色背景 canvas.drawColor(Color.RED) // 可以在这里进行更多绘制操作 // ... } finally { surface.unlockCanvasAndPost(canvas) } } catch (e: Exception) { e.printStackTrace() } }.start() }