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I’m working on my first Android app and to be honest I’m not sure about most of what I’m doing. Right now I’m stuck on a NullPointerException that is created by a line that refers to another class that, in turn, refers to another class.
How can I locate the error?
The word you are looking for is debug. If you are using eclipse, it’s very easy to debug your program in most cases. Two main options in eclipse are to use the logger for debug prints to logcat, or debug the program step by step to detect relevant errors. Here is a tutorial for both options and here is a nice video tutorial in YouTube regarding debug in eclipse.