Android 5，camera2 只使用闪光灯
我只需要使用带有 API camera2(Android 5，API 级别 21)的闪光灯，例如手电筒应用程序.但是我发现的所有示例都需要在视图中显示相机流
I need to use only the flash with the API camera2 (Android 5, API level 21), like torch applications. But all the examples that I found requires the display of camera stream in a view
推荐答案
https://github.com/pinguo-yuyidong/Camera2/blob/master/app/src/main/java/us/yydcdut/androidltest/otheractivity/FlashActivity.java
在这里，打开flash不需要预览.
https://github.com/pinguo-yuyidong/Camera2/blob/master/app/src/main/java/us/yydcdut/androidltest/otheractivity/FlashActivity.java
here，you don't need the preview to open the flash.
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