How to programatically determine if an Android application is obfuscated?

I have and Android app where vari开发者_运维问答ous people test both development builds and release builds. The development builds are not obfuscated and I would like to be able to programatically determine at runtime if the application has been obfuscated or not.

Is there a way to do this?

Here's one idea: add a class to your code base that is not used at all. Proguard will obfuscate and/or remove it. So, loading it via reflection in the app ought to cause ClassNotFoundException if it's been run through ProGuard.

As @Sean proposed use a class which has no (external) dependencies.

But beware, ProGuard can detect the use of reflection, so you must somehow load class from string name, by not using a string literal (text resource maybe?): http://proguard.sourceforge.net/index.html#/FAQ.html%23forname

Select a class which is always renamed by Proguard after obfuscation. Its name is ExampleClass.java in the code below. Check its name in runtime with the following line:

ExampleClass.java
...     
public static final boolean OBFUSCATED = !ExampleClass.class.toString().contains("ExampleClass");

That's all. No helper class or method is required and works without causing exceptions.