Well, if you have a computer, you could still develop applications for Android. Of course, the first time, when you'll publish your app on Google Play, you'll have to pay 25$ normally. But once you have paid this, Google takes no royalty normally, and if you make a successful game/app, you could probably earn some money !
Also, you'll have to learn Java (Android's API rests on the Java Development Kit), and C/C++ (Native Development Kit).