Cannot find R.layout.activity_main in main activity.java

Question

I am developing an app, and have started working on main screen design but I am not able to test my app. When I want to test the app it suddenly stop all the time and error showing in catlog in the line

setContentView(R.layout.activity_main)

I have attached the screenshots in this question also.

main activity

Take a look [here](https://stackoverflow.com/questions/16045118/cannot-find-r-layout-activity-main). — Vasilis G., Dec 06 '17 at 18:26

score 1 · Accepted Answer · edited Jun 20 '20 at 09:12

1

I invite to you to clean project and rebuild again, you have the how to here.

And remove those imports that contains R in your project.

import vibhor.dev.eat24.R;

import vibhor.dev.eat24.R.layout;

I see you have this :

dependencies {
   classpath 'com.android.tools.build:gradle:3.0.1'
   classpath 'com.google.gms:google-services:3.1.0'
}

Change it to :

dependencies {
        classpath 'com.android.tools.build:gradle:2.3.3'
}

This is problem of your library, take a look on this answer, try it, if it does not work.. just change the library.

edited Jun 20 '20 at 09:12

Community

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1

answered Dec 06 '17 at 18:28

Skizo-ozᴉʞS ツ

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i did the same as you said whn i clean project R got red then during rebuild it was not red but when i run the app ,it is giving me the same error :( https://imgur.com/a/LoRCO https://imgur.com/a/Vfpwq – Vibhor Vibhuti Dec 06 '17 at 18:46
Clean project and build? – Skizo-ozᴉʞS ツ Dec 06 '17 at 18:47
ya i did that ,can i send you code or by any method ,i need to solve it quickly :( – Vibhor Vibhuti Dec 06 '17 at 18:54
make a screenshoot of logcat please – Skizo-ozᴉʞS ツ Dec 06 '17 at 18:57
move a little bit to the right I need to see the error clear – Skizo-ozᴉʞS ツ Dec 06 '17 at 19:06
Can you post the `activity_main.xml` please? – Skizo-ozᴉʞS ツ Dec 06 '17 at 19:19
Show me your build.gradle please, make sure you have this implemenation 'info.hoang8f:fbutton:1.0.5'; – Skizo-ozᴉʞS ツ Dec 06 '17 at 19:23
build.gradle(project)-https://justpaste.it/1eaih build.gradle(module:app)-https://justpaste.it/1eaij – Vibhor Vibhuti Dec 06 '17 at 19:26
Change `compile 'info.hoang8f:fbutton:1.0.5'` to `implementation 'info.hoang8f:fbutton:1.0.5'` – Skizo-ozᴉʞS ツ Dec 06 '17 at 19:28
i did this but the app is stil not running :( https://imgur.com/a/BZMnB – Vibhor Vibhuti Dec 06 '17 at 19:35
yes i checked and did that but got this error at this point ..i didn't understand what it is saying https://imgur.com/a/ux7Zk – Vibhor Vibhuti Dec 06 '17 at 19:40
If there is an update of dependencies then i dont think that we should use 2.3.3 in place of 3.0.1 – Vibhor Vibhuti Dec 06 '17 at 20:08
Hey,i just solved this to degrade the gradle build version to 2.3.3 :) – Vibhor Vibhuti Dec 07 '17 at 16:04
thank you so much :) but just tell me 1 thing will get problem in some devices due to gradle degradation??? – Vibhor Vibhuti Dec 07 '17 at 16:05

score 0 · Answer 2 · answered Dec 06 '17 at 18:26

0

try that solution:

check that the import for R class is not import com.android.R;

and you should make it import yourpackagename.R, then recompile

if it works, your answer has already been replied here.

answered Dec 06 '17 at 18:26

Aimée

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6

try to check your gradle configurations, clean the code and then recompile your project. – Aimée Dec 06 '17 at 18:44

colens · Answer 3 · 2017-12-06T20:52:21.717

0

R.java is automatically generated on build, and it is automatically imported so you don't have to import it explicitly.

Try this:

delete generated sub folder in your app folder since R.java is in one of its sub folders

rebuild your project and generated folder will be generated again

edited Dec 06 '17 at 20:52

answered Dec 06 '17 at 20:35

colens

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i did this but stll app is not running :( – Vibhor Vibhuti Dec 07 '17 at 05:36
Sorry for late reply. Could you please post your logcat window. I would like to see the actual exception you are getting. And your activity_main xml layout file as well. – colens Dec 07 '17 at 22:29

score 0 · Answer 4 · answered Oct 21 '19 at 00:47

0

vibhor vibhoti -- your problem is that you are using ( view ) tag with v small in your activity_main.xml change it to ( View ) with Capital V .. that is the SOLUTION

answered Oct 21 '19 at 00:47

prog_student

1
2

Cannot find R.layout.activity_main in main activity.java

4 Answers4