Question

E / AndroidRuntime：致命异常：主要 java.lang.RuntimeException：无法连接到摄像头服务在android.hardware.Camera.native_setup（本机方法）在android.hardware.Camera。（Camera.java:423）在android.hardware.Camera.open（Camera.java:384）在ge.baqari.dev.capture.ui.view.CameraView.surfaceChanged（CameraView.kt：39）在android.view.SurfaceView.updateWindow（SurfaceView.java:617）在android.view.SurfaceView.access $ 000（SurfaceView.java:88）在android.view.SurfaceView $ 3.onPreDraw（SurfaceView.java:183）在android.view.ViewTreeObserver.dispatchOnPreDraw（ViewTreeObserver.java:692）在android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:2123）在android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1139）在android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:4879）在android.view.Choreographer $ CallbackRecord.run（Choreographer.java:776）在android.view.Choreographer.doCallbacks（Choreographer.java:579）在android.view.Choreographer.doFrame（Choreographer.java:548）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.Looper.loop（Looper.java:153）在android.app.ActivityThread.main（ActivityThread.java:5341） at java.lang.reflect.Method.invokeNative（Native Method）在java.lang.reflect.Method.invoke（Method.java:511）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:929）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:696）在dalvik.system.NativeStart.main（本地方法）

我找到了很多答案，但是他们没有帮助我，我正在尝试创建自定义相机视图，实现表面支架，但它总是使用Camera.open（）方法崩溃，带参数且没有参数相同，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

问题在于CameraParameters，参数为null，您尝试设置空参数

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)

此外，您可以将此库用于camera preview

RuntimeException：无法连接到摄像头服务？

1 个答案: