Where is the R.java file in Android Studio?

Question

Where is the R.java file in Android Studio? Can someone please help with this? I already tried google for the answer but can't find any solution.

All you need to do is type R. to see the autocompletion suggestions. — adinutzyc21, Feb 15 '15 at 02:18

Sergey V. · Answer 1 · 2020-04-08T19:37:33.713

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Based on the new stable release of Android Studio (3.6) we have:

So, now to find your generated resource classes you need the following steps:

1) Open your project.

2) Go to your module build path.

3) Open the outputs/apk/debug/app-name-debug.apk file.

4) Choose your classes.dex file.

5) Look at the down placed area and go to your full package path.

6) You can see all bytecoded resource classes. So, scroll down to what you are looking for.

7) Expand the resource class you need to proceed (for example, let it be R.id)

8) Go to you id's.

That's it.

UPDATE:

If you would like to see actual id integer number you should follows steps below:

1) By (7) Go to the resource class you need to proceed and right click to show the context menu

2) Choose "Show Bytecode" to see the flexible dialog "DEX Byte Code for R$id", for example, for id class

3) Scroll down to the actual id to look its number

edited Apr 08 '20 at 19:37

answered Apr 07 '20 at 12:09

Sergey V.

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That's the correct answear in 2020 (Android Studio 3.6), but how can I read actual id? like button17 = 52444873 ? – Karol Żygłowicz Apr 08 '20 at 15:39
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if somebody wonders: "The new Android Gradle Plugin generates the corresponding bytecode directly and does not make the intermediate R.java file." https://forums.bignerdranch.com/t/cant-find-r-java-in-android-studio-3-6-newest-release/17266 – bomben Apr 12 '20 at 08:00
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Also look at `classes2.dex` and `classes3.dex` for your package. If you search an `id`, probably you won't find it there, because it can belong to another package. See https://stackoverflow.com/a/61277205/2914140 for a short way. – CoolMind Sep 23 '20 at 09:48
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For me it was `classes2.dex`, and `classes.dex` didn't contain my app package at all – Adam Burley Sep 29 '22 at 14:43
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For me, selecting `resources.arsc` in the APK gave me a table with the type of resource (id, drawable, color, attr, etc) on the left and on the right the ID shown in the Crash and the Name of the resource. – Benny Feb 12 '23 at 21:31

score 32 · Answer 2 · answered Apr 17 '20 at 17:22

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Although the current Android Gradle Plugin doesn't generate a R.java anymore you can still inspect the corresponding class file (see Sergey V.`s answer).

However, if you (like probably in most cases) just want to look up the generated IDs for your resources, there is an easier way:

In the project pane on the left hand side switch from Android to Project view using the drop-down at the top. Then navigate to app/build/intermediates/runtime_symbol_list/<insert build type here>/R.txt. This file lists all IDs generated by AGP during the build process.

answered Apr 17 '20 at 17:22

ubuntudroid

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Thanks! A correct answer. It will look like `int drawable bonus_item 0x7f0800f1`. – CoolMind Sep 23 '20 at 09:52
This is the short and corrrect answer – Adi Feb 09 '22 at 08:27

score 18 · Answer 3 · edited Mar 21 '19 at 16:52

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I use Android Studio 3.3.2

\app\build\generated\not_namespaced_r_class_sources\debug\processDebugResources\r\android\support\constraint\R.java

enter image description here

edited Mar 21 '19 at 16:52

Ahmed Ashour

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answered Mar 11 '19 at 12:54

OulinaArt

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That's right,thanks so much.BTW,I'm using AS 3.5.2. – aolphn Nov 27 '19 at 06:42
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There is no `not_namespaced_r_class_sources` folder in AS 3.6.1 – gmk57 Mar 05 '20 at 11:09
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@gmk57 Look at answer by Sergey V. down here. – bomben Apr 12 '20 at 07:49

CoolMind · Answer 4 · 2020-09-23T12:06:57.320

As noted above, "The new Android Gradle Plugin generates the corresponding bytecode directly and does not make the intermediate R.java file".

Using the ubuntudroid solution you can find an id also this way. Find R.txt and copy absolute path. Project > app > build > intermediates > runtime_symbol_list > debug > R.txt. Then right click and select Copy Path..., 1. Absolute Path Ctrl+Shift+C.

This way you will obtain a path to R.txt, for instance, "C:\Users\user\AndroidStudioProjects\your_project\app\build\intermediates\runtime_symbol_list\debug\R.txt". Copy the path without R.txt to a text file for future references, for example, with Notepad++.

Press Ctrl+Shift+F to find in directory. Insert an id and the path.

== Old answer ==

Change a project view from Android to Project or Project Files. Find one of these two files.

Then you can revert back to Android view.

score 12 · Answer 5 · edited Aug 06 '18 at 15:45

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I use Android Studio 2.3.3. The R.java file is shown in the picture above.

In the left upper side, there is a select list. Select the [project] option so that you can see all the folders and files.

edited Aug 06 '18 at 15:45

0xCursor

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answered Aug 03 '17 at 17:18

Niamatullah Bakhshi

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I feel sorry for the OP. I seriously doubt he/she was asking for a screenshot of the actual R file. The answer should clearly explain how it is generated as well. – Jan 03 '19 at 07:46

score 6 · Answer 6 · answered Feb 15 '15 at 01:43

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R.java is the generated file by ADT or Android studio. It will be located under app\build\generated\source\r directory.

./app/build/generated/source/r/debug/android/support/v7/appcompat/R.java
./app/build/generated/source/r/debug/your/packagename/name/R.java

answered Feb 15 '15 at 01:43

alijandro

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there is no directory called r under source. see other answers - the source is no longer generated, only bytecode, if your AGP version is 3.6 or above. – Adam Burley Sep 29 '22 at 14:46

score 3 · Answer 7 · edited Nov 03 '17 at 03:48

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I am using Android Studio 2.2.3 , the R.java file is shown in the picture below. Goto in the left upper side there is a selecting list ,

select [package]
Open "App Folder"
com.example.saeedanwar.myapplication;
r

screenshot

edited Nov 03 '17 at 03:48

Pang

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answered Nov 03 '17 at 03:21

Engr Saeed Anwar

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score 2 · Answer 8 · answered Oct 27 '20 at 12:48

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In my project in Android Studio 4.1
R.jar that you can actually unzip resides in app build folder, as follows:

jar -xf R.jar

Once the jar is unpacked you can find R.java inside of app package:

answered Oct 27 '20 at 12:48

27P

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score 2 · Answer 9 · answered Feb 16 '21 at 08:08

If you're using Mac or Linux, try the following command line on your terminal:

find . -name "R.*"

It will print something like:

./app/build/intermediaries/runtime_symbol_list/debug/R.txt
./app/build/intermediaries/compile_and_runtime_not_namespaced_r_class_jar/debug/R.jar

score 1 · Answer 10 · edited Aug 01 '18 at 20:49

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It is inside app\build\generated\source\r folder

edited Aug 01 '18 at 20:49

Patrick Mevzek

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answered Feb 15 '15 at 01:42

Belal Khan

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score 0 · Answer 11 · answered Jan 23 '17 at 05:12

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Project/app/build/generated/source/r/debug/com.android.'projectname'/R.java

answered Jan 23 '17 at 05:12

Shubhamhackz

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score 0 · Answer 12 · answered Jan 21 '20 at 08:07

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--The R.Java that contains your xml layouts and views id's in Android Studio 3.5.3 -- Project/app/build/generated/not_namespaced_r_class_sources/debug/r/com/"your package"/R.java

answered Jan 21 '20 at 08:07

Bad0

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Bad Loser · Answer 13 · 2023-02-22T01:21:38.337

This answer will be in a constant state of flux until Android standardize a method of matching their annoying decimal/hexadecimal id references to a tangible resource such as my_layout.xml.

For Android Studio Dolphin | 2021.3.1 Patch 1 have a look at this file:

/project/package/build/intermediates/stable_resource_ids_file/debug/stableIds.txt

It is produced by RUN (not just BUILD). Sample:

layout/mtrl_picker_header_fullscreen = 0x7f0d00de
string/cancel = 0x7f1101f0
style/ThemeOverlay.MaterialComponents.MaterialCalendar = 0x7f1202f3
id/gpxBtn = 0x7f0a0346

Where is the R.java file in Android Studio?

13 Answers13

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