Question

问题：即使在查看聚焦预览后，也无法在sumsang设备中正确获取状态（CaptureResult.ControlAfState）。它始终返回PassiveFocused（值2）或其他，但不返回FocusLocked（值4）。在其他情况下，将ControlAfMode设置为Auto，即使它是模糊图像，我也可以获得状态FocusLocked（4）

这是预览请求代码，尝试了Scenerio的

  1) PreviewRequestBuilder.Set(CaptureRequest.ControlAfMode,
        (int)ControlAFMode.ContinuousPicture);
        CaptureSession.SetRepeatingRequest(PreviewRequestBuilder.Build(),
        mCaptureCallback,backgroundHandler);


  2) PreviewRequestBuilder.Set(CaptureRequest.ControlAfMode, (int)ControlAFMode.Auto);
    CaptureSession.SetRepeatingRequest(PreviewRequestBuilder.Build(), mCaptureCallback, backgroundHandler);
    PreviewRequestBuilder.Set(CaptureRequest.ControlAfTrigger, (int)ControlAFTrigger.Start);
    CaptureSession.Capture(PreviewRequestBuilder.Build(), mCaptureCallback, backgroundHandler);
    PreviewRequestBuilder.Set(CaptureRequest.ControlAfTrigger, (int)ControlAFTrigger.Idle);
    CaptureSession.SetRepeatingRequest(PreviewRequestBuilder.Build(), mCaptureCallback, backgroundHandler);


      3) PreviewRequestBuilder.Set(CaptureRequest.ControlMode,(int)ControlMode.Auto);
PreviewRequestBuilder.Set(CaptureRequest.ControlAfMode,
(int)ControlAFMode.Auto);
PreviewRequestBuilder.Set(CaptureRequest.ControlAfTrigger,
(int)ControlAFTrigger.Start);
PreviewRequestBuilder.Set(CaptureRequest.ControlAePrecaptureTrigger,(int)ControlAEPrecaptureTrigger.Start);
PreviewRequestBuilder.Set(CaptureRequest.ControlAfTrigger,(int)ControlAFTrigger.Idle);
CaptureSession.SetRepeatingRequest(PreviewRequestBuilder.Build(), mCaptureCallback, backgroundHandler);

请帮助！！如果以上说明中有任何问题，请留下评论。谢谢提前

Xamarin Android使用Camera2 API，需要执行自动对焦。

0 个答案: