R cannot be resolved to symbol

Question

Every time i change minSDKVersion from build.grade from 8 to 9 i get that R error

I checked every single solution been mentioned here

"cannot resolve symbol R" in Android Studio

without fixing it

beside I cant keep minSDKVersion to 8 as many things just don`t work with 8

my gradle

apply plugin: 'com.android.application'

android {
compileSdkVersion 22
buildToolsVersion "22.0.1"
defaultConfig {
    applicationId "com.kareem.droid1"
    minSdkVersion 9
    targetSdkVersion 22
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
productFlavors {
}
}

dependencies {
compile 'com.google.android.gms:play-services-ads:7.3.0'
}

how to solve it ?

thanks for help

usually indicates an issue with a resource. there should be other errors before this one. — njzk2, Mar 09 '16 at 18:27
there isnt any other error ..i even tried to build new one and also if i changed 8 to 9 i got R error — Kareem Elsayed, Mar 09 '16 at 18:29
Does hitting the button to 'Sync project with Gradle Files' do anything? When you change the minSdkVersion variable, you will need to re-sync with gradle... — jyanks, Mar 09 '16 at 18:29
as i said i tried all mentioned in the link which include resync with gradle but no difference — Kareem Elsayed, Mar 09 '16 at 18:31
Why did you make a project that used 8 as the minimum? Or is it an old project? — OneCricketeer, Mar 09 '16 at 18:42
no i tried all midSDKVersions and the only one that cause no R error is 8 — Kareem Elsayed, Mar 09 '16 at 18:44
But you said in your question that you changed from 8 to 9, and **then** get an error... What exactly are the steps you are following to reproduce the error? Is this a new project or an old one? — OneCricketeer, Mar 09 '16 at 18:48
@cricket_007 change gradle.build MinSDKVersion from 8 to 9 that produce error if i tried to change 9 to 8 problem still the same..if i created new one with 8 it works if i changed to 9 it gives error too — Kareem Elsayed, Mar 09 '16 at 18:55
But if you leave it at 8, everything is fine? That is a sign you need to re-sync the project — OneCricketeer, Mar 09 '16 at 19:01
i did resync ...beside i need atleast Version to be 9 for some google play services — Kareem Elsayed, Mar 09 '16 at 19:16
Your project is using `gms:play-services-ads:7.3.0'`, so are you sure that with minSDK 8 your project run fine? — Gueorgui Obregon, Mar 09 '16 at 21:31
no thats why i am trying to change it to Version 8 which leads to R error — Kareem Elsayed, Mar 09 '16 at 21:35
I create new project from scratch with your configuration and everything works fine, I just have another two dependencies `compile 'com.android.support:appcompat-v7:22.2.1'` and `compile 'com.android.support:design:22.2.1'` — Gueorgui Obregon, Mar 09 '16 at 21:38
EDIT: I removed 'com.android.support:design:22.2.1'` I only have compile 'com.android.support:appcompat-v7:22.2.1' and works fine.. — Gueorgui Obregon, Mar 09 '16 at 21:46
@g2o thank you man ...can you make it an answer to close the question ? — Kareem Elsayed, Mar 09 '16 at 22:42

score 1 · Accepted Answer · answered Mar 09 '16 at 22:48

I create new project from scratch with your configuration and everything works fine. I just have another two dependencies in my build.gradle

 compile 'com.android.support:appcompat-v7:22.2.1' 
 compile 'com.android.support:design:22.2.1'

EDIT: I removed 'com.android.support:design:22.2.1' and still works fine..

Please check your project dependencies

Hope its helps!!

score 0 · Answer 2 · answered Mar 09 '16 at 21:41

0

clean you project after yoy change build.gradle file

Build>clean project

should help.

answered Mar 09 '16 at 21:41

Maksim Novikov

835
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R cannot be resolved to symbol

2 Answers2