This series of posts is all about those small things in Android that you can use and/or abuse for your benefit. Small hidden gems or just simple hacks to overcome some issues. This post is all about the Invisible Activity, the activity without a gui / ui!
So you have created a nice and handy app and it looks fine on your test devices and on the emulator. You upload and publish your game on the Google Play Store and what happens? You get some very great reviews but also some very bad ones. How can this happen? You look into it and you get reaction like “blurry text”, “shadow text”, “alignment issues” and a lot more of those kinds of bad reviews. So what has gone wrong?
At this moment we have an image rendered using OpenGL ES 2.0. In order to create a game we need user input to do something with image. We are going to move the image to the right and the left by pressing the screen of the phone. Let’s begin: