Close apps that may be using the camera, then reopen the camera app. Then check camera permission for the affected app.
On Android, menu names vary by maker, so use Settings search when a path in a guide does not match your phone exactly.
Why this can happen
- another app is holding the camera
- camera permission is disabled
- the camera app cache/state is corrupted
- the device is too hot and limits camera features
- a specific lens or camera module has a hardware fault
The practical troubleshooting sequence
- Close apps that may be using the camera, then reopen the camera app.
- Check camera permission for the affected app.
- Restart the device.
- Test front and rear cameras separately to identify whether one module fails.
- Install system/app updates and test again.
Use a clean A/B test
Test the built-in camera app and one second app. If both fail on the same lens, the issue is system-level or hardware. If only one app fails, its permission or local state is the better target.
Confirm that the problem is actually gone
Test photo, video and a second camera-using app; if only one lens fails everywhere, hardware becomes more likely.
When to use support or repair
If one physical camera module fails in every app after a restart and updates, service may be required—especially after impact, liquid exposure or a repair.
Note the phone model, Android version, affected app or setting, exact message and whether restarting or Safe Mode changes the result.
Frequently asked questions
Should I reset the whole device immediately?
Usually not. Test the affected feature with a built-in tool or second app first. Back up local-only files before clearing app storage or considering a factory reset.
How do I know when the fix is real?
Test photo, video and a second camera-using app; if only one lens fails everywhere, hardware becomes more likely.
Official sources and further reading
Android labels differ across Pixel, Samsung and other brands. Use Settings search for the named control if a menu path does not match your phone.