Android - Camera2 : The Easiest Way To Turn On The Torch Light

The simplest way to turn on the torch light was : Camera camera = Camera.open(); Camera.Parameters parameters = camera.getParameters(); parameters.setFlashMode(Camera.Parameters.FL

Solution 1:

check the answer from Daniel Netzer here you just need to write 3 line to turn on torch

CameraManager camManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
String cameraId = camManager.getCameraIdList()[0]; // Usually front camera is at 0 position and back camera is 1.
camManager.setTorchMode(cameraId, true);