how can I turn on the camera flash for specific duration in Android

Question

How to turn on camera flash light programmatically in Android?

my question us a variation of the above one i want to specifically set the duration for turning on the flash the value of which is found on runtime

is there any way to do this? thanks!

Answer 1

Here is a link to a tutorial for building a flashlight android application: android flashlight tutorial

I think the following lines may prove helpful to you:

"Turning on flashlight can be done by setting camera flash mode to FLASH_MODE_TORCH. The following two functions getCamera() and turnOnFlash() will do that for us. Add these functions to your [activity]"

To turn off the flash by setting the camera flash mode to "FLASH_MODE_OFF"

The code for the 'getCamera()' and 'turnOnFlash()' functions can be found by following the link above.. So, I urge you to follow the link and check out the code samples they've posted in steps 8 and 9, they should help you to get the light turning on and off programmatically.

Next, in order to get the code to run on a specific time interval you can implement a runnable to turn the flashlight off a specific amount of time after it was turned on.

Here is an example of how to run the turnOffFlash() function (or whatever you have called it) with a delay.

new Handler().postDelayed(new Runnable() {

        @Override
        public void run() {
            turnOffFlash();
        }
    }, 10000);

Replace 10000 with your delay in millis.