gianluca-nitti
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 # android-expr-eval
 Android application to solve math expressions. Based on [java-expr-eval](https://github.com/gianluca-nitti/java-expr-eval).
 
+#Download/compile
+See the releases page for prebuilt APK.
+To build from source, clone the repository, make sure you have the Android SDK installed (and you have the ANDROID_HOME environment variable correctly set), and run
+```
+./gradlew assembleRelease
+```
+(you may need to `chmod +x gradlew` it if it's not already executable).
+
 #Screenshots ([Imgur album](http://imgur.com/a/wOJfT))
-![Main activity](http://imgur.com/DJSZBVH.png)
-![Context dialog](http://imgur.com/uCcd0Ih.png)
-![New variable dialog](http://imgur.com/RTTOVlu.png)
-![New function dialog](http://imgur.com/cro2lgq.png)
+![Main activity](http://i.imgur.com/DJSZBVH.png)
+![Context dialog](http://i.imgur.com/uCcd0Ih.png)
+![New variable dialog](http://i.imgur.com/RTTOVlu.png)
+![New function dialog](http://i.imgur.com/cro2lgq.png)