RuntimeException：无法连接到camera服务？

Question

E/AndroidRuntime：致命异常：main java.lang.Runtime异常：无法连接到Android.Hardware.camera.Native_Setup（本机方法）（Android.Hardware.camera.Open（camera.java:423)（Android.Hardware.camera.Open）（camera.java:384)（ge.baqari.dev.capture.ui.view.CameraView.SurfaceChanged（CameraView.kt:39)（Android.View.SurfaceView.UpdateWindow（8）在android.view.choreographer$FrameDisplayEventReceiver.Run（choreographer.java:762)在android.os.handler.handleCallback（handler.java:725)在android.os.handler.dispatchMessage（handler.java:92)在android.os.handler.dispatchMessage（handler.java:153)在android.app.activitythread.main（activitythread.java:5341)在

我找到了很多答案，但没有一个对我有帮助，我正在尝试创建自定义相机视图，实现表面保持器，但它总是崩溃与camera.open（）方法，有参数和没有参数相同，崩溃

class CameraView : android.view.SurfaceView, android.view.SurfaceHolder.Callback {

    var camera: android.hardware.Camera? = null
    var previewing = false
    var cameraCallback: CameraCallBack? = null
    var pictureCallback: PictureCallback? = null
    var cameraParameters: android.hardware.Camera.Parameters? = null

    private fun init() {
        holder.addCallback(this)
        holder.setType(SURFACE_TYPE_NORMAL)
    }

    constructor(context: android.content.Context, attrs: android.util.AttributeSet) : super(context, attrs) {
        init()
    }

    override fun surfaceCreated(surfaceHolder: android.view.SurfaceHolder) {

    }

    override fun surfaceChanged(surfaceHolder: android.view.SurfaceHolder, i: Int, i1: Int, i2: Int) {
        if (context.packageManager.hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)){
            if (previewing) {
                camera?.stopPreview()
                previewing = false
            }

            if (camera == null) {
                try {
                    camera = Camera.open(android.hardware.Camera.CameraInfo.CAMERA_FACING_BACK)
                    cameraParameters!!.setPreviewSize(i1, i2)
                    camera!!.parameters = cameraParameters!!
                    camera!!.startPreview()
                    camera!!.setPreviewDisplay(holder)
                    previewing = true
                } catch (e: java.io.IOException) {
                    e.printStackTrace()
                }
            }
        }
    }

    override fun surfaceDestroyed(surfaceHolder: android.view.SurfaceHolder) {
        camera!!.stopPreview()
        camera!!.release()
        previewing = false;
    }
}

Answer 1

在CameraParameters中出现问题，参数为空，而您试图设置空参数

修复：

camera = Camera.open(android.hardware.Camera.CameraInfo.CAMERA_FACING_BACK)
cameraParameters = camera!!.parameters
cameraParameters!!.setPreviewSize(i1, i2)
camera!!.parameters = cameraParameters!!
camera!!.startPreview()
camera!!.setPreviewDisplay(holder)

您还可以使用此库进行相机预览