The key requirement is an Android phone camera app that supports manual controls, usually called Pro mode. If your phone has it, set a long shutter speed (for example, several seconds) to capture light trails or light painting.

You’ll also need to adjust exposure settings such as ISO and, where available, other manual settings so the image doesn’t come out too bright or too dark. For long exposures, keeping ISO lower often helps control brightness and noise.

A tripod or solid support is essential. You won’t be able to hold the phone steady enough by hand for exposures of 1 second or longer.

If your phone does not support Pro/manual mode, then you may not be able to change shutter speed at all, and long-exposure shooting may simply not be possible with the built-in camera controls.

So, in short: check for Pro/manual mode, set a slow shutter speed, stabilize the phone, and fine-tune exposure settings.