Android API Level 16 and higher Torch App

Question

I found this Question but it doesn't work for me. (Nothing happens. Tested on Wiko Rainbow Jam) Android - Camera2 : The easiest way to turn on the torch light

My App have to run on min. API Level 16! Is there an SupportCameraManager or an Library (under Apache), which can I use?

Answer 1

SOLUTION: The problem was that I only got the camera's parameters when turning on the light and turning off the light. This must apparently also be done in the constructor or in the overwriting onStart method.

@Override
protected void onStart() {
    super.onStart();

    camera = Camera.open(); //Also Call this
    params = camera.getParameters(); //and this, in the Constructor
}

as fields:

private Camera camera;
Parameters params;

And then you can start the flashlight with these snippets of code: Android - Camera2 : The easiest way to turn on the torch light

Answer 2

You Can Use this.

Initialize the NoobCameraManager singleton.

NoobCameraManager.getInstance().init(this);

You can optionally set the Log Level for debug logging. Logging uses LumberJack library. The default LogLevel is LogLevel.None

NoobCameraManager.getInstance().init(this, LogLevel.Verbose);

After that you just need to call the singleton to turn on or off the camera flash.

NoobCameraManager.getInstance().turnOnFlash();
NoobCameraManager.getInstance().turnOffFlash();

You can take care of the runtime permission to access Camera yourself or can allow the library to do it for you

NoobCameraManager.getInstance().takePermissions();

Note: The library will take permissions, if you haven't already, even without calling takePermissions() explicitly. This behavior may change in future.

It's easy to toggle Flash too

NoobCameraManager.getInstance().toggleFlash();

It's a good practice to release all the resources, once you're done.

NoobCameraManager.getInstance().release();