Spring boot scheduler annotation on abstract class

I want to have schedular annotation on abstract class so that child classes doesnt need to have the annotations. Something similar to this in the abstract class @Bean public String getDelay(){ return someDelay; } @Scheduled(fixedRateString = “#{@getDelay}”) public void getZeroBytesFile(){ But it doesnt work and throws this exception org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name ‘getDelay’:…

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How can I turn on flashlight in old devices

I’m trying to run flashlight on old devices especially lower than API level 21 but unfortunately I got error Error java.lang.RuntimeException: Unable to start activity ComponentInfo{com.flashlight.app/com.test.MainActivity}: java.lang.RuntimeException: Fail to connect to camera service Code android.hardware.Camera camera = android.hardware.Camera.open(); android.hardware.Camera.Parameters parameters = camera.getParameters(); parameters.setFlashMode(android.hardware.Camera.Parameters.FLASH_MODE_TORCH); camera.setParameters(parameters); camera.startPreview();

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