Compose中CameraX的takePicture()在SDK 29下无返回问题求助

我在Compose中用CameraX实现了预览和拍照功能，最近收到不少SDK 29版本用户反馈无法拍照。在SDK 29模拟器上调试发现，takePicture()方法始终不返回。代码里没发现明显错误，谷歌搜索也没找到有效思路，想问有没有开发者遇到过相同问题或者有解决建议？

代码实现 #

val localContext = LocalContext.current
val lifecycleOwner = LocalLifecycleOwner.current

val cameraProviderFuture = remember {
    ProcessCameraProvider.getInstance(localContext)
}

val cam = remember { mutableStateOf<Camera?>(null) }
val imageCapture = remember { mutableStateOf<ImageCapture?>(null) }

Box(modifier = modifier) {
    AndroidView(
        factory = { context ->
            val previewView = PreviewView(context)
            val preview = Preview.Builder().build()
            val selector = CameraSelector.Builder()
                .requireLensFacing(CameraSelector.LENS_FACING_BACK)
                .build()
            preview.setSurfaceProvider(previewView.surfaceProvider)

            imageCapture.value = ImageCapture.Builder().build()

            cam.value = cameraProviderFuture.get().bindToLifecycle(
                lifecycleOwner,
                selector,
                preview,
                imageCapture.value
            )

            previewView
        },
        modifier = Modifier.fillMaxSize()
    )

    DisposableEffect(lifecycleOwner) {
        onDispose {
            cameraProviderFuture.get().unbindAll()
        }
    }

    LaunchedEffect(key1 = targetFile) {
        targetFile?.let {
            val outputFileOptions = ImageCapture.OutputFileOptions
                .Builder(targetFile)
                .build()
            imageCapture.value?.takePicture(   // 在SDK 29上无返回
                outputFileOptions,
                Executors.newSingleThreadExecutor(),
                object : ImageCapture.OnImageSavedCallback {
                    override fun onImageSaved(outputFileResults: ImageCapture.OutputFileResults) {
                        onPictureTakenClicked()
                    }

                    override fun onError(exception: ImageCaptureException) {
                    }
                }
            )
        }
    }
}

Manifest配置 #

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />

<uses-feature android:name="android.hardware.camera" android:required="true" />

Gradle依赖 #

implementation "androidx.camera:camera-camera2:1.3.0-alpha07"
implementation "androidx.camera:camera-lifecycle:1.3.0-alpha07"
implementation "androidx.camera:camera-video:1.3.0-alpha07"
implementation "androidx.camera:camera-view:1.3.0-alpha07"

更新说明 #

我尝试将图片保存至内部存储，代码如下：

val file = File(context.filesDir, System.currentTimeMillis().toString())
file.createNewFile()

可能的解决方向 #

• 补全权限与文件操作异常处理：SDK 29对外部存储访问有严格限制，即使切换到内部存储，createNewFile()可能抛出IO异常，需添加try-catch捕获，避免异常导致流程静默卡住。
• 替换回调线程：当前使用Executors.newSingleThreadExecutor()可能在SDK 29出现线程阻塞，建议改用ContextCompat.getMainExecutor(localContext)或CameraX推荐的线程池。
• 升级CameraX版本：1.3.0-alpha07是测试版，存在兼容性bug概率高，建议升级到最新稳定版（如1.4.0），官方通常会修复旧版本的适配问题。
• 明确ImageCapture配置：给ImageCapture.Builder()添加具体参数，比如设置捕获模式、目标分辨率，避免默认配置在SDK 29上不兼容：

  imageCapture.value = ImageCapture.Builder()
      .setCaptureMode(ImageCapture.CAPTURE_MODE_MINIMIZE_LATENCY)
      .setTargetResolution(Size(1920, 1080))
      .build()
  

• 完善错误日志：给onError方法添加日志打印，比如Log.e("CameraX", "拍照失败: ${exception.message}", exception)，方便定位具体异常原因。

内容的提问来源于stack exchange，提问作者IIIIIIIIIIIIIIIIIIIIII