Use APKPure App
Get Underwater Camera old version APK for Android
Take pictures underwater
Capacitive touchscreens doesn't work underwater, with this application, you can use the volume buttons to take the pictures.
You can use Xperia Active, Motorola Defy or other "waterproof" phone to take photos using this app.
Warning: This application doesn't protect your phone from the water. Use it by your own risk.