0

我很高兴在我的应用程序上使用 CameraX。我在 github 上参考了谷歌官方的 CameraX，但是出了点问题。请帮助我。，

这是我设置纵横比的代码

private fun aspectRatio(width: Int, height: Int): Int {
    val previewRatio = max(width, height).toDouble() / min(width, height)
    if (abs(previewRatio - RATIO_4_3_VALUE) <= abs(previewRatio - RATIO_16_9_VALUE)) {
        return AspectRatio.RATIO_4_3
    }
    return AspectRatio.RATIO_16_9
}

这是我的预览代码

@SuppressLint("UnsafeExperimentalUsageError")private fun startCamera() {
    val cameraProviderFuture = ProcessCameraProvider.getInstance(this)
    viewFinder=binding.surfaceView
    cameraProviderFuture.addListener({
        // Used to bind the lifecycle of cameras to the lifecycle owner
        val cameraProvider: ProcessCameraProvider = cameraProviderFuture.get()
        val metrics = DisplayMetrics().also { viewFinder.display.getRealMetrics(it) }
        Log.d(TAG, "Screen metrics: ${metrics.widthPixels} x ${metrics.heightPixels}")
        val screenAspectRatio = aspectRatio(metrics.widthPixels, metrics.heightPixels)
        Log.d(TAG, "Preview aspect ratio: $screenAspectRatio")
        Size(metrics.widthPixels, metrics.heightPixels)

        val rotation = viewFinder.display.rotation

        // Preview
        val preview = Preview.Builder()
            .setTargetRotation(rotation)
            .setTargetAspectRatio(screenAspectRatio)
            .build()

        imageCapture = if (flashStatus) {
            ImageCapture.Builder()
                .setCaptureMode(ImageCapture.CAPTURE_MODE_MAXIMIZE_QUALITY)
                .setTargetRotation(rotationimage)
                .setTargetAspectRatio(screenAspectRatio)
                .build()
        } else {
            ImageCapture.Builder()
                .setCaptureMode(ImageCapture.CAPTURE_MODE_MAXIMIZE_QUALITY)
                .setTargetRotation(rotationimage)
                .build()
        }

        // Select back camera as a default
        val cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA

        // Unbind use cases before rebinding
        cameraProvider.unbindAll()
        viewFinder.scaleType=PreviewView.ScaleType.FILL_CENTER

        try {
            // Bind use cases to camera
            val cam = cameraProvider.bindToLifecycle(
                this, cameraSelector, preview, imageCapture)
            if (!flashStatus) {
                if (cam.cameraInfo.hasFlashUnit()) {
                    cam.cameraControl.enableTorch(true)
                }
            } else {
                cam.cameraControl.enableTorch(false)
            }
            // Attach the viewfinder's surface provider to preview use case
            preview.setSurfaceProvider(viewFinder.surfaceProvider)


        } catch (exc: Exception) {
            Log.e(TAG, "Use case binding failed", exc)
        }

    }, ContextCompat.getMainExecutor(this))
}

并且此输出预览 输出预览被拉伸

我的代码有什么问题？

谢谢你的帮助我伙计们。，

更新 当我的设备处于黑暗模式时，预览是正常的。 在黑暗模式下预览正常 如何在正常模式下修复？

4

0 回答 0