Mouse not working on Android
A mouse that won't click, scroll, or move on Android is usually a connection, battery, or button-switch issue. Run through these, then test every button live.
Step-by-step fix
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Replug the USB receiver (try another port) or re-pair Bluetooth; replace the battery on a wireless mouse.
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Run the CheckMyMic mouse test — check left, right, middle, scroll and a double-click.
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Clean the optical sensor and try a different surface or mousepad.
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Adjust pointer speed and double-click settings in Android mouse settings.
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Update the mouse/USB driver and restart Android.
Frequently asked questions
My double-click registers as one click on Android.
That's usually a worn button switch. Run the mouse test's double-click check a few times — if it's inconsistent, the switch is failing. As a stopgap, lengthening the double-click speed/window in Android's mouse settings can buy the switch some time.
The scroll wheel doesn't work on Android.
Open the mouse test and scroll over the pad. If nothing registers there, the wheel encoder is faulty; if it does register, the wheel is fine — check the scroll settings in Android and the app where scrolling misbehaves.
The mouse still misbehaves on Android after every step — now what?
Test the same mouse on another computer with the CheckMyMic mouse test. If the fault follows the mouse — a button that won't register, phantom double-clicks, dead scroll — the switch or encoder is worn and it's replacement time. If the mouse behaves elsewhere, the problem is this machine's port, driver or settings.
Can I use a USB mouse on my Android phone?
Yes, if the phone supports USB-OTG (most do): plug the mouse in with a USB-OTG adapter and a pointer appears immediately. Bluetooth mice pair under Settings → Connected devices. Then open the mouse test in your browser to confirm every button, the wheel and double-click register.