CameraX 当我按下拍照按钮时，无法输入 OnImageSavedCallback

Question

我尝试检查断点问题，但在此：“object : OnImageSavedCallback{ " 行，调试器不能再进一步，只是退出函数而没有任何错误。我希望有人能告诉我我缺少的部分。

我还已经将权限请求添加到 AndroidManifest.xml 以在存储上写入和读取媒体。

class MainActivity : AppCompatActivity() {
private lateinit var  binding: ActivityMainBinding

private var imageCapture:ImageCapture? = null
private lateinit var outputDirectory: File

private lateinit var  cameraExecutor:ExecutorService

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    binding = ActivityMainBinding.inflate(layoutInflater)
    setContentView(binding.root)

    outputDirectory = getOutputDirectory()
    cameraExecutor = Executors.newSingleThreadExecutor()

    if(allPermissionGranted()){
        Toast.makeText(this, "Camera Permissions are Granted", Toast.LENGTH_SHORT).show()
        startCamera()
    }
    else
    {
        ActivityCompat.requestPermissions(
            this, Constants.REQUIRED_PERMISSIONS,
            Constants.REQUEST_CODE_PERMISSIONS
        )
    }

    binding.btnTakePhoto.setOnClickListener {
        takePhoto()
    }


}

private  fun getOutputDirectory(): File{
    val mediaDir = externalMediaDirs.firstOrNull()?.let { mFile ->
        File(mFile, resources.getString(R.string.app_name)).apply {
            mkdirs()
        }
    }

    return  if(mediaDir != null && mediaDir.exists())
        mediaDir else filesDir
}

private fun takePhoto(){
    val imageCapture = imageCapture?: return

    val photoFile = File(
        outputDirectory,
        SimpleDateFormat(Constants.FILE_NAME_FORMAT,
            Locale.getDefault()).format(System.currentTimeMillis()) + ".jpg")

    val outputOption = ImageCapture.OutputFileOptions.Builder(photoFile).build()

    imageCapture.takePicture(
        outputOption, ContextCompat.getMainExecutor(this),
        object : OnImageSavedCallback{
            override fun onImageSaved(outputFileResults: ImageCapture.OutputFileResults) {
                val savedUri = Uri.fromFile(photoFile)
                val msg = "Photo Saved"

                Toast.makeText(
                    this@MainActivity,
                    "$msg $savedUri",
                    Toast.LENGTH_LONG
                ).show()
            }

            override fun onError(exception: ImageCaptureException) {
                Log.e(Constants.TAG, "onError: ${exception.message}",exception)
            }
        }
    )
}
private fun startCamera(){
    val cameraProviderFuture = ProcessCameraProvider.getInstance(this)

    cameraProviderFuture.addListener({

        val cameraProvider: ProcessCameraProvider = cameraProviderFuture.get()

        val preview = Preview.Builder().build().also {
            mPreview->
            mPreview.setSurfaceProvider(
                binding.viewFinder.surfaceProvider
            )
        }
        imageCapture = ImageCapture.Builder().build()

        val cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA

        try{
            cameraProvider.unbindAll()
            cameraProvider.bindToLifecycle(
                this, cameraSelector, preview, imageCapture
            )

        }
        catch (e: Exception){
            Log.d(Constants.TAG, "startCamera Fail:", e)
        }
    }, ContextCompat.getMainExecutor(this))
}

@SuppressLint("MissingSuperCall")
override fun onRequestPermissionsResult(
    requestCode: Int,
    permissions: Array<String>,
    grantResults: IntArray
) {
    if(requestCode == Constants.REQUEST_CODE_PERMISSIONS){
        if(allPermissionGranted()){
            startCamera()
        }
        else
        {
            Toast.makeText(this, "Permissions Not Granted by User", Toast.LENGTH_SHORT).show()

            finish()
        }
    }
}

private  fun allPermissionGranted() =
    Constants.REQUIRED_PERMISSIONS.all{
        ContextCompat.checkSelfPermission(
            baseContext, it
        ) == PackageManager.PERMISSION_GRANTED
    }

override fun onDestroy() {
    super.onDestroy()
    cameraExecutor.shutdown()
}

}

Answer 1

埃米尔汗。

我相信错误出现在“outputOption”中。 切换到此代码并尝试运行应用程序并单击按钮。

另一件事，当尝试运行程序并且您的应用关闭时，您可以使用“调试”查看哪一行代码出现问题。

我希望它成功了，拥抱。

...

val outputFilesOption = ImageCapture.OutputFileOptions.Builder(photoFile).build()

        imageCapture.takePicture(
            outputFilesOption,getMainExecutor(this),
            object : ImageCapture.OnImageSavedCallback {

...