I am having a lot of trouble getting started with Processing's android mode. It took me quite a while to enable the android mode and to get the sdk with all the right files in it, but just then another problem came up: it just cannot detect any device!
I have enabled the USB debugging on two android phones and tried it with both of them, but it didn't detect any of them. I have restarted the phones, disabled and enabled the USB debugging mode, but I always get the same result. I have run 'adb devices' on the command prompt, but the list of connected devices is always empty. Please give me suggestions as to how I should proceed from here.
My OS is Windows 8.1, and the two phones are Redmi Note 7 pro and Realme 5s, which both have Android 9.
Expanding on my comment above: you need to make sure the Windows ADB drivers are installed for the device. From my experience, lower end smartphones tend not to have great developer support.
Disclaimer I do not own any of the devices you mention to test and won't be responsible for any potential damage trying the advice bellow.
Here are a few relevant bits of information
XDA-developers forum Relevant info:
Go to Settings -> Permissions -> Install via USB: Uncheck your App if it's listed. Go to Settings -> Additional Settings -> Privacy: Check the Unknown Sources option. Go to Settings -> Additional Settings -> Developer options: Check the Install via USB option. Go to Settings -> Additional Settings -> Developer options:Enable view attribute inspection Finally Go to Settings -> Additional Settings -> Developer options:Turn off MIUI optimization. And then restart your device and whoooaaaa it will work i guaranteee..
NOTE - Signin in to MI account is required to enable Install via USB option.
SDK Manager -> SDK Tools -> Install "Google USB Driver"
Go to Windows Device Manager, find "ADB Interface" -> update driver -> select manually -> select from list -> all devices -> select folder "C:\Users\Username\AppData\Local\Android\sdk\extra s\google\usb_driver" -> select "Android ADB Interface"
Windows will warn you that this driver might not work, install it anyway
Device manager will show "Android ADB Interface" ...
There's also this page: https://c.mi.com/thread-1906671-1-0.html
However I'm not 100% sure it's legit: I'm weary of mediafire links. Bare in mind this may be a risky download: always scan with using an antivirus with the latest definitions.