CameraX 库如何打开/关闭手电筒? [英] How does CameraX library can turn ON/OFF the torch?

问题描述

我正在开发一项功能，可以将手电筒切换到开/关状态.几天前，我们在 io2019 中看到了来自 Google 的新库.我想出了一个主意，为什么不使用它.

I am developing a feature with the possibility of switching the torch into ON/OFF states. Some days ago, we saw a new library from Google in io2019. I came up with an idea, why not use it.

一段时间后，我看不到任何可能使用图书馆中唯一的手电筒.

After some time, I don't see any possibilities to use the only torch from the library.

即使在官方文档中，我也找不到任何适合我的信息，而且他们的示例应用程序也不必处理我的情况.

Even in the official documentation, I wasn't able to find any good pieces of information for me, what's more, the sample app from their also don't have to handle my case.

您有什么容易实现的想法，或者您知道如何使用 CameraX 来实现吗?

我担心使用相机或相机2，因为要粘贴的代码量很糟糕.

I am worried about using camera or camera2 because the amount of code to be paste is terrible.

链接:

[1] https://developer.android.com/training/camerax

[2] https://proandroiddev.com/android-camerax-preview-analyze-capture-1b3f403a9395

[3] https://github.com/android/camera/tree/master/CameraXBasic

[4] https://github.com/android/camera/tree/master/CameraXBasic

CameraX 是一个 Android Jetpack 库，旨在简化相机开发.

推荐答案

androidx.camera:camera-core:1.0.0-alpha10

你可以用这个检查手电筒是否可用:

You can check is torch available or not with this:

val camera = cameraProvider.bindToLifecycle(lifecycleOwner, cameraSelector, preview, imageAnalyzer)

camera.cameraInfo.hasFlashUnit()

您可以通过以下方式启用手电筒:

And you can enable torch with:

camera.cameraControl.enableTorch(true)

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