Odtnhj

I have an existing application that uses SQLiteOpenHelper for communicating between the database and app but I decided to migrate to Room. I try every way to add Room component but all of them return to me the same error I make a new project and implement that Room library and worked! but in this project that has SQLiteOpenHelper I gave error .when I add Room Library Code ,I receive this error:

Failed to resolve: support-core-utils

and my build.gradle(module) that I add Room components:

apply plugin: 'com.android.application'
android 
 compileSdkVersion 27
 defaultConfig 
 applicationId "com.example.yasin.taksmssender"
 minSdkVersion 15
 targetSdkVersion 27
 versionCode 1
 versionName "1.0"
 testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
 // used by Room, to test migrations
 javaCompileOptions 
 annotationProcessorOptions 
 arguments = ["room.schemaLocation":
 "$projectDir/schemas".toString()]
 
 
 sourceSets 
 androidTest.assets.srcDirs +=
 files("$projectDir/schemas".toString())
 
 
 buildTypes 
 release 
 minifyEnabled false
 proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
 
 


dependencies 
 implementation fileTree(dir: 'libs', include: ['*.jar'])
 implementation 'com.android.support:appcompat-v7:27.1.1'
 implementation 'com.android.support.constraint:constraint-layout:1.1.2'
 implementation 'com.android.support:support-v4:27.1.1'
 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'
 implementation 'com.android.support:design:27.1.1'
 implementation 'com.android.support:recyclerview-v7:27.1.1'
 implementation 'com.android.support:cardview-v7:27.1.1'
 implementation 'de.hdodenhof:circleimageview:2.2.0'
 implementation 'com.squareup.okhttp3:okhttp:3.7.0'
 implementation 'com.github.pchmn:MaterialChipsInput:1.0.8'
 implementation 'com.github.PhilJay:MPAndroidChart:v2.2.4'
 implementation 'pub.devrel:easypermissions:1.1.3'

// Room components
 implementation "android.arch.persistence.room:runtime:$rootProject.roomVersion"
 annotationProcessor "android.arch.persistence.room:compiler:$rootProject.roomVersion"
 androidTestImplementation "android.arch.persistence.room:testing:$rootProject.roomVersion"

and build.gradle(project):

// 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:3.1.4'


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


ext 
 roomVersion = '1.1.1'
 archLifecycleVersion = '1.1.1'
 
allprojects 
 repositories 
 google()
 jcenter()
 maven url "https://jitpack.io" 
 


task clean(type: Delete) 
 delete rootProject.buildDir

Reason probably is that Room does not yet support support-core-utils 27.1.1, but 26.1.0.

https://mvnrepository.com/artifact/android.arch.persistence.room/runtime/1.1.1

solved this issue by changing

implementation ('android.arch.persistence.room:runtime:$rootProject.roomVersion',
 exclude group: 'com.android.support', module: 'support-core-utils'
)