两行代码用camera2 打开闪光灯

 

CameraManager c = (CameraManager)getSystemService(Context.CAMERA_SERVICE);

c.setTorchMode(c.getCameraList[0],true);//打开闪光灯

c.setTorchMode(c.getCameraList[0],false);//关闭闪光灯

 

权限

不需要