Compiling
Open android studio and inside of android studio click Menu > File > Open
Select the extracted folder (extracted folder > AndroidHtmlApp)
Now go to Menu > Build > Generate App Bundles or APKs > Generate APKs
You will get this message. On this click locate (if you get an error just click the button again)
And you will see your APK. (DONT LEAVE YET! NEXT STEP IS VERY IMPORTANT!)
Next step (Adding YOUR html content)