Android相机，永不调用onPictureTaken（byte [] imgData，Camera相机）方法和PictureCallback

我唯一可能发现的原因是您在

jpegCallback

返回之前再次启动了预览。根据javadoc，这是不允许的：

调用此方法后，在返回JPEG回调之前，您不得调用startPreview（）或拍摄其他图片。

The callback is actually put on the UI thread queue - which will be suspended
in your

Thread.sleep()

and the same thread will have called

stopPreview()

and

startPreview()

before actually coming to the callback. Generally
speaking, if you call

Thread.sleep()

on the UI thread - you’re doing it
wrong. So, hopefully if you remove the

sleep()

and put what comes after it
in the

jpegCallback

your problem should be solved.