Android Studio CameraX预览版

Question

我正在学习一个关于如何构建cameraX定制相机的教程，我被卡住了。

在本教程中，他使用了以下内容：

        PreviewConfig previewConfig = new PreviewConfig.Builder().setTargetAspectRatioCustom(aspectRatio).build();
        Preview preview = new Preview(previewConfig)
        preview.setOnPreviewOutputUpdateListener() { 
            ...
        }

我发现此方法已更改，现在您不需要PreviewConfig，只需这样做即可：

        Preview preview = new Preview.Builder().setTargetAspectRatioCustom(aspectRatio).build();

但是用于预览的setOnPreviewOutUpdateListener（）方法不再存在（无法解析符号“setOnPreviewOutUpdateListener”）。我该怎么办？

非常感谢。

Answer 1

我想这会对你有帮助。。

            // preview user case
            Preview preview = new Preview.Builder()
                    .build();

            preview.setSurfaceProvider(cameraActivityBinding.viewFinder.getSurfaceProvider());

            // camera selector use case
            cameraSelector = new CameraSelector.Builder()
                    .requireLensFacing(lensFacingBack)
                    .build();

            ImageAnalysis imageAnalysis = new ImageAnalysis.Builder()
                    .setBackpressureStrategy(ImageAnalysis.STRATEGY_KEEP_ONLY_LATEST)
                    .build();

            // imagecapture user case
            ImageCapture.Builder builder = new ImageCapture.Builder();
            imageCapture = builder
                    .setCaptureMode(ImageCapture.CAPTURE_MODE_MAXIMIZE_QUALITY)
                    .setTargetRotation(activity.getWindowManager().getDefaultDisplay().getRotation())
                    .setTargetAspectRatio(AspectRatio.RATIO_4_3)
                    .build();

            // video capture use case
            videoCapture = new VideoCapture.Builder()
                    .setTargetRotation(activity.getWindowManager().getDefaultDisplay().getRotation())
                    .setCameraSelector(cameraSelector)
                    .setVideoFrameRate(30)
                    .setTargetAspectRatio(AspectRatio.RATIO_4_3)
                    .build();


            preview.setSurfaceProvider(cameraActivityBinding.viewFinder.getSurfaceProvider());
            camera = cameraProvider.bindToLifecycle((LifecycleOwner) this, cameraSelector, preview, imageCapture,videoCapture);

需要更多详细信息，请参阅此处