I have just started learning about Android and I was planning on making a few apps.
So I was wondering what langua开发者_如何学Cge do I build apps on and what are the free tools and ebooks about it and also any good IDE for it?
It's in Java and the IDE that can be used is Eclipse: all information on this SDK page
But you should ask this on the Stackexchange site: here
As Edelcom said, Android apps are built in Java.
Eclipse is one of the IDEs that can be used, though personally I prefer using IntelliJ. IntelliJ10 comes with Android SDK - go for the Community Edition, it's free :)
Have a look at the Android website for lots of information, the tutorials are a good place to start, and are great for hands-on learning - http://developer.android.com/resources/browser.html?tag=tutorial
As of December 2014 use Android Studio.
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