Question

我开发了一个Android应用程序，可通过camerax扫描QR码。预览时如何禁用自动对焦？

没有尝试

public void initCamera(Fragment fragment, OnQRResultListener onQRResultListener) {
    mOnQRResultListener = onQRResultListener;
    PreviewConfig previewBuild = new PreviewConfig.Builder()
            .setTargetResolution(new Size(getWidth(), getHeight()))
            .setTargetAspectRatio(new Rational(1, 1))
            .setLensFacing(CameraX.LensFacing.FRONT)
            .build();
    preview = new Preview(previewBuild);
    preview.setOnPreviewOutputUpdateListener(new Preview.OnPreviewOutputUpdateListener() {
        @Override
        public void onUpdated(Preview.PreviewOutput output) {
            textureView.setSurfaceTexture(output.getSurfaceTexture());
        }
    });
    HandlerThread analyzerThread = new HandlerThread("BarcodeAnalyzer");
    analyzerThread.start();
    ImageAnalysisConfig analysisBuild = new ImageAnalysisConfig.Builder()
            .setTargetResolution(new Size(getWidth(), getHeight()))
            .setTargetAspectRatio(new Rational(1, 1))
            .setLensFacing(CameraX.LensFacing.FRONT)
            .setImageReaderMode(ImageAnalysis.ImageReaderMode.ACQUIRE_LATEST_IMAGE)
            .setCallbackHandler(new Handler(analyzerThread.getLooper()))
            .build();
    ImageAnalysis analysis = new ImageAnalysis(analysisBuild);
    analysis.setAnalyzer(new QRCodeAnalyzer(onAnalyzerResultListener));
    CameraX.bindToLifecycle(fragment, preview, analysis);
}

它缓慢扫描qr结果

Answer 1

查看此链接：

https://developer.android.com/reference/androidx/camera/core/FocusMeteringAction.Builder#disableAutoCancel()

也可以在 stackoverflow 上看到这个答案：

https://stackoverflow.com/a/60095886/8401205

这是一个简单的java版本的小代码段：

FocusMeteringAction action = new FocusMeteringAction.Builder(point, FocusMeteringAction.FLAG_AF).disableAutoCancel().build();

Camerax如何禁用自动对焦

1 个答案: