How can I find all unused methods of my project in the Android Studio IDE?

Question

How can I find all unused methods and variables of my project in the Android Studio IDE?

Mr. DownVoter, may I ask you why you down vote this question? — Hamed Ghadirian, Nov 12 '15 at 15:14
Not my downvote, but maybe it was someone who read the first words of the title and thought your question falls in an off-topic category: "Questions asking us to recommend or find a book, tool, software library, tutorial or other off-site resource are off-topic for Stack Overflow as they tend to attract opinionated answers and spam. Instead, describe the problem and what has been done so far to solve it." I don't think your question is off-topic, but you might want to change the title to "How can I find..." as you wrote in the question body, to prevent misunderstandings. — Fabio says Reinstate Monica, Nov 12 '15 at 16:03

score 103 · Accepted Answer · edited May 31 '18 at 09:14

103

In the android studio(or more generally in the Intellij IDEA) you can specify inspection code that you want to analyze from Analyze->Inspect Code... and then define the scope of your code. You can see the result for my code in the below picture:

In Declaration redundancy you can see that "someMethod" is declared unused. Also, in Probable bugs you can find variable i is never used.

edited May 31 '18 at 09:14

Håvard Geithus

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answered Nov 12 '15 at 15:06

Hamed Ghadirian

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And an easy way to get the job done. Thanks to both of you guys. – Sakhawat Hossain Jan 26 '20 at 15:30
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Why is this setting not sticky? Every time I open Android Studio I have to recheck this setting. And I always explicitly Apply and press Ok. – doctorram May 29 '22 at 06:43

score 5 · Answer 2 · edited Dec 14 '18 at 17:27

5

You can also install the QAPlug via File -> Settings -> Plugins -> Browse Repositories -> QAPlug.

For Mac:

Android Studio -> Preferences... -> Plugins -> Browse Repositories -> QAPlug.

In QAPlug is PMD, FindBugs, Checkstyle and Hammurapi integrated. These tools are very nice to find dead code, bugs, increase performance and make the code more readable. I highly recommend those tools if you work for a bigger project.

edited Dec 14 '18 at 17:27

Alireza Noorali

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answered Nov 12 '15 at 15:11

Erythrozyt

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How to use this plugin – Ankita Singh Nov 17 '16 at 06:44
How will it tell bugs to developers can you explain a bit more – Ankita Singh Nov 17 '16 at 06:45
Android 3.0, installed pluging, keeps crashing on AS restart or if I try to use it... Anyone got it working with AS 3.0? – 3c71 Nov 04 '17 at 13:52

score 5 · Answer 3 · answered Jan 17 '21 at 17:56

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Nowadays its in Analyze->Inspect Code... and then you need to go to Kotlin | Redundant contructs | Unused symbol

answered Jan 17 '21 at 17:56

Jacob Nordfalk

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How can I find all unused methods of my project in the Android Studio IDE?

3 Answers3

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