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Android build success but cannot resolve R


“cannot resolve symbol R” in Android StudioIs there a way to run Python on Android?How to save an Android Activity state using save instance state?R cannot be resolved - Android errorClose/hide the Android Soft KeyboardWhy is the Android emulator so slow? How can we speed up the Android emulator?Is there a unique Android device ID?Proper use cases for Android UserManager.isUserAGoat()?Android Studio 3.2.1 - New project fails to runCould not find class 'dalvik.system…'android gradle error: libraries must use the exact same version specification.found version 28.0.0






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4















help me, my Android cannot resolve symbol R( the R becomes red color) but when i try to build project, it succeed. anybody know why ? i already try clean project, rebuild project, sync project with gradle files and also invalidate cache and restart but still cannot resolve R



here is my gradle (app):



apply plugin: 'com.android.application'
android
compileSdkVersion 28
defaultConfig
applicationId "com.justinjunias.stockitem"
minSdkVersion 24
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

buildTypes
release
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'




apply plugin: 'com.google.gms.google-services'
dependencies
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
// Butterknife
implementation 'com.jakewharton:butterknife:8.6.0'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.6.0'

//Design
implementation 'com.android.support:design:28.0.0'
//Volley
implementation 'com.android.volley:volley:1.1.1'
//Firebase
implementation 'com.google.firebase:firebase-core:16.0.8'
implementation 'com.google.firebase:firebase-database:16.0.6'
implementation 'com.google.firebase:firebase-auth:16.2.0'
implementation 'com.google.firebase:firebase-firestore:18.1.0'



And my gradle build:



// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript

repositories
google()
jcenter()

dependencies
classpath 'com.android.tools.build:gradle:3.3.2'
//Firebase
classpath 'com.google.gms:google-services:4.2.0'


// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files



allprojects
repositories
google()
jcenter()



task clean(type: Delete)
delete rootProject.buildDir










share|improve this question
























  • “cannot resolve symbol R” is the most common error when building Android apps (for beginners). We need to see the errors to isolate it.

    – Jon Goodwin
    Mar 25 at 2:38












  • If you are added all your dependencies well,do invalidate caches and restart Android Studio.Perhaps it will works.

    – Rahul Kushwaha
    Mar 25 at 2:49











  • when i run the application, it succeed but the R is still red/cannot resolve

    – Jin Asterich
    Mar 25 at 2:53











  • what is your android studio version.

    – Vishrut Mavani
    Mar 25 at 3:07











  • @VishrutMavani my android version is 3.2.1

    – Jin Asterich
    Mar 25 at 3:10

















4















help me, my Android cannot resolve symbol R( the R becomes red color) but when i try to build project, it succeed. anybody know why ? i already try clean project, rebuild project, sync project with gradle files and also invalidate cache and restart but still cannot resolve R



here is my gradle (app):



apply plugin: 'com.android.application'
android
compileSdkVersion 28
defaultConfig
applicationId "com.justinjunias.stockitem"
minSdkVersion 24
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

buildTypes
release
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'




apply plugin: 'com.google.gms.google-services'
dependencies
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
// Butterknife
implementation 'com.jakewharton:butterknife:8.6.0'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.6.0'

//Design
implementation 'com.android.support:design:28.0.0'
//Volley
implementation 'com.android.volley:volley:1.1.1'
//Firebase
implementation 'com.google.firebase:firebase-core:16.0.8'
implementation 'com.google.firebase:firebase-database:16.0.6'
implementation 'com.google.firebase:firebase-auth:16.2.0'
implementation 'com.google.firebase:firebase-firestore:18.1.0'



And my gradle build:



// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript

repositories
google()
jcenter()

dependencies
classpath 'com.android.tools.build:gradle:3.3.2'
//Firebase
classpath 'com.google.gms:google-services:4.2.0'


// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files



allprojects
repositories
google()
jcenter()



task clean(type: Delete)
delete rootProject.buildDir










share|improve this question
























  • “cannot resolve symbol R” is the most common error when building Android apps (for beginners). We need to see the errors to isolate it.

    – Jon Goodwin
    Mar 25 at 2:38












  • If you are added all your dependencies well,do invalidate caches and restart Android Studio.Perhaps it will works.

    – Rahul Kushwaha
    Mar 25 at 2:49











  • when i run the application, it succeed but the R is still red/cannot resolve

    – Jin Asterich
    Mar 25 at 2:53











  • what is your android studio version.

    – Vishrut Mavani
    Mar 25 at 3:07











  • @VishrutMavani my android version is 3.2.1

    – Jin Asterich
    Mar 25 at 3:10













4












4








4








help me, my Android cannot resolve symbol R( the R becomes red color) but when i try to build project, it succeed. anybody know why ? i already try clean project, rebuild project, sync project with gradle files and also invalidate cache and restart but still cannot resolve R



here is my gradle (app):



apply plugin: 'com.android.application'
android
compileSdkVersion 28
defaultConfig
applicationId "com.justinjunias.stockitem"
minSdkVersion 24
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

buildTypes
release
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'




apply plugin: 'com.google.gms.google-services'
dependencies
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
// Butterknife
implementation 'com.jakewharton:butterknife:8.6.0'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.6.0'

//Design
implementation 'com.android.support:design:28.0.0'
//Volley
implementation 'com.android.volley:volley:1.1.1'
//Firebase
implementation 'com.google.firebase:firebase-core:16.0.8'
implementation 'com.google.firebase:firebase-database:16.0.6'
implementation 'com.google.firebase:firebase-auth:16.2.0'
implementation 'com.google.firebase:firebase-firestore:18.1.0'



And my gradle build:



// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript

repositories
google()
jcenter()

dependencies
classpath 'com.android.tools.build:gradle:3.3.2'
//Firebase
classpath 'com.google.gms:google-services:4.2.0'


// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files



allprojects
repositories
google()
jcenter()



task clean(type: Delete)
delete rootProject.buildDir










share|improve this question
















help me, my Android cannot resolve symbol R( the R becomes red color) but when i try to build project, it succeed. anybody know why ? i already try clean project, rebuild project, sync project with gradle files and also invalidate cache and restart but still cannot resolve R



here is my gradle (app):



apply plugin: 'com.android.application'
android
compileSdkVersion 28
defaultConfig
applicationId "com.justinjunias.stockitem"
minSdkVersion 24
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

buildTypes
release
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'




apply plugin: 'com.google.gms.google-services'
dependencies
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
// Butterknife
implementation 'com.jakewharton:butterknife:8.6.0'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.6.0'

//Design
implementation 'com.android.support:design:28.0.0'
//Volley
implementation 'com.android.volley:volley:1.1.1'
//Firebase
implementation 'com.google.firebase:firebase-core:16.0.8'
implementation 'com.google.firebase:firebase-database:16.0.6'
implementation 'com.google.firebase:firebase-auth:16.2.0'
implementation 'com.google.firebase:firebase-firestore:18.1.0'



And my gradle build:



// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript

repositories
google()
jcenter()

dependencies
classpath 'com.android.tools.build:gradle:3.3.2'
//Firebase
classpath 'com.google.gms:google-services:4.2.0'


// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files



allprojects
repositories
google()
jcenter()



task clean(type: Delete)
delete rootProject.buildDir







android






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Mar 25 at 3:02







Jin Asterich

















asked Mar 25 at 2:31









Jin AsterichJin Asterich

364




364












  • “cannot resolve symbol R” is the most common error when building Android apps (for beginners). We need to see the errors to isolate it.

    – Jon Goodwin
    Mar 25 at 2:38












  • If you are added all your dependencies well,do invalidate caches and restart Android Studio.Perhaps it will works.

    – Rahul Kushwaha
    Mar 25 at 2:49











  • when i run the application, it succeed but the R is still red/cannot resolve

    – Jin Asterich
    Mar 25 at 2:53











  • what is your android studio version.

    – Vishrut Mavani
    Mar 25 at 3:07











  • @VishrutMavani my android version is 3.2.1

    – Jin Asterich
    Mar 25 at 3:10

















  • “cannot resolve symbol R” is the most common error when building Android apps (for beginners). We need to see the errors to isolate it.

    – Jon Goodwin
    Mar 25 at 2:38












  • If you are added all your dependencies well,do invalidate caches and restart Android Studio.Perhaps it will works.

    – Rahul Kushwaha
    Mar 25 at 2:49











  • when i run the application, it succeed but the R is still red/cannot resolve

    – Jin Asterich
    Mar 25 at 2:53











  • what is your android studio version.

    – Vishrut Mavani
    Mar 25 at 3:07











  • @VishrutMavani my android version is 3.2.1

    – Jin Asterich
    Mar 25 at 3:10
















“cannot resolve symbol R” is the most common error when building Android apps (for beginners). We need to see the errors to isolate it.

– Jon Goodwin
Mar 25 at 2:38






“cannot resolve symbol R” is the most common error when building Android apps (for beginners). We need to see the errors to isolate it.

– Jon Goodwin
Mar 25 at 2:38














If you are added all your dependencies well,do invalidate caches and restart Android Studio.Perhaps it will works.

– Rahul Kushwaha
Mar 25 at 2:49





If you are added all your dependencies well,do invalidate caches and restart Android Studio.Perhaps it will works.

– Rahul Kushwaha
Mar 25 at 2:49













when i run the application, it succeed but the R is still red/cannot resolve

– Jin Asterich
Mar 25 at 2:53





when i run the application, it succeed but the R is still red/cannot resolve

– Jin Asterich
Mar 25 at 2:53













what is your android studio version.

– Vishrut Mavani
Mar 25 at 3:07





what is your android studio version.

– Vishrut Mavani
Mar 25 at 3:07













@VishrutMavani my android version is 3.2.1

– Jin Asterich
Mar 25 at 3:10





@VishrutMavani my android version is 3.2.1

– Jin Asterich
Mar 25 at 3:10












1 Answer
1






active

oldest

votes


















3














Option 1: Update Android Studio to 3.3



Option 2: Update Gradle Version in Project Level build.gradle



classpath 'com.android.tools.build:gradle:3.2.1'


Option 3: Take into account the following IDE functionalities:



Sync Project with gradle files



Build -> Clean Project



Build -> Rebuild Project



File -> Invalidate caches






share|improve this answer























  • if you are using Android Studio 3.2.1 then you need to change gradle version with classpath 'com.android.tools.build:gradle:3.2.1'

    – Vishrut Mavani
    Mar 25 at 3:14











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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









3














Option 1: Update Android Studio to 3.3



Option 2: Update Gradle Version in Project Level build.gradle



classpath 'com.android.tools.build:gradle:3.2.1'


Option 3: Take into account the following IDE functionalities:



Sync Project with gradle files



Build -> Clean Project



Build -> Rebuild Project



File -> Invalidate caches






share|improve this answer























  • if you are using Android Studio 3.2.1 then you need to change gradle version with classpath 'com.android.tools.build:gradle:3.2.1'

    – Vishrut Mavani
    Mar 25 at 3:14















3














Option 1: Update Android Studio to 3.3



Option 2: Update Gradle Version in Project Level build.gradle



classpath 'com.android.tools.build:gradle:3.2.1'


Option 3: Take into account the following IDE functionalities:



Sync Project with gradle files



Build -> Clean Project



Build -> Rebuild Project



File -> Invalidate caches






share|improve this answer























  • if you are using Android Studio 3.2.1 then you need to change gradle version with classpath 'com.android.tools.build:gradle:3.2.1'

    – Vishrut Mavani
    Mar 25 at 3:14













3












3








3







Option 1: Update Android Studio to 3.3



Option 2: Update Gradle Version in Project Level build.gradle



classpath 'com.android.tools.build:gradle:3.2.1'


Option 3: Take into account the following IDE functionalities:



Sync Project with gradle files



Build -> Clean Project



Build -> Rebuild Project



File -> Invalidate caches






share|improve this answer













Option 1: Update Android Studio to 3.3



Option 2: Update Gradle Version in Project Level build.gradle



classpath 'com.android.tools.build:gradle:3.2.1'


Option 3: Take into account the following IDE functionalities:



Sync Project with gradle files



Build -> Clean Project



Build -> Rebuild Project



File -> Invalidate caches







share|improve this answer












share|improve this answer



share|improve this answer










answered Mar 25 at 3:12









Vishrut MavaniVishrut Mavani

1,121722




1,121722












  • if you are using Android Studio 3.2.1 then you need to change gradle version with classpath 'com.android.tools.build:gradle:3.2.1'

    – Vishrut Mavani
    Mar 25 at 3:14

















  • if you are using Android Studio 3.2.1 then you need to change gradle version with classpath 'com.android.tools.build:gradle:3.2.1'

    – Vishrut Mavani
    Mar 25 at 3:14
















if you are using Android Studio 3.2.1 then you need to change gradle version with classpath 'com.android.tools.build:gradle:3.2.1'

– Vishrut Mavani
Mar 25 at 3:14





if you are using Android Studio 3.2.1 then you need to change gradle version with classpath 'com.android.tools.build:gradle:3.2.1'

– Vishrut Mavani
Mar 25 at 3:14



















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