This topic is about an android apps that's capable of developing android apps.
It's called AIDE and you can get it for free on playstore.

Description
AIDE is an integrated development
environment (IDE) for developing real Android
apps directly on your Android device. Follow
interactive coding lessons and step-by-step
become an expert app developer. Visually
design apps, write code with the feature rich
editor with code completion, real-time error
checking, refactoring and smart code
navigation, and run your app with a single
click.
AIDE features interactive lessons with step-by-
step instructions to learn Android app
development and Java programming skills.
Follow the lessons, become an expert and
apply what you've learned in your own app
projects.
AIDE will turn your Android tablet with
keyboard into a real development box. We use
the Transformer Prime to code with AIDE. AIDE
will turn your Android Phone into a small
development computer to browse and touch
your code on the go.
AIDE supports building apps with Java/Xml
and the Android SDK, apps with C/C++ and
the Android NDK as well as pure Java console
applications. AIDE is fully compatible with
Eclipse projects. You can just copy the
sourcecode to your device and open the
Eclipse project in AIDE to start coding.
Alternatively you can keep your sourcecode on
your Dropbox - AIDE integrates with Dropbox
and allows to easily download from your
Dropbox and sync back your changes. AIDE
can also open Android Studio projects, which
follow the default folder structure. AIDE also
supports Git for professional development

Here's the playstore link: https://play.google.com/store/apps/details?id=com.aide.ui&hl=en

Here's the direct apk download link: www27.zippyshare.com/v/28482261/file.html

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The Fall of Buhari