How to make android phone flashlight blink?

Question

I am trying to make the LED flashlight of android phone blink based on binary code like if char = 1 turn LED light on else if char = 0 turn LED off.

if ( char ==         


        

Answer 1

use this method it works, im using in my app

private void blink(final int delay, final int times) {
        Thread t = new Thread() {
            public void run() {
                try {

                    for (int i=0; i < times*2; i++) {
                        if (isFlashOn) {
                            turnOffFlash();
                        } else {
                            turnOnFlash();
                        }
                        sleep(delay);
                    }

                } catch (Exception e){ 
                    e.printStackTrace(); 
                }
            }
        };
        t.start();
        }

     private void turnOnFlash() {
        if (!isFlashOn) {
            if (camera == null || params == null) {
                return;
            }

            params = camera.getParameters();
            params.setFlashMode(Parameters.FLASH_MODE_TORCH);
            camera.setParameters(params);
            camera.startPreview();
            isFlashOn = true;
        }

    }

    private void turnOffFlash() {
        if (isFlashOn) {
            if (camera == null || params == null) {
                return;
            }
            params = camera.getParameters();
            params.setFlashMode(Parameters.FLASH_MODE_OFF);
            camera.setParameters(params);
            camera.stopPreview();
            isFlashOn = false;
        }
    }