AAPT: error: resource android:attr/fontVariationSettings not found.

_~.gradle\caches\transforms-1\files-1.1\appcompat-v7-27.1.1.aar\b455673db66bf379c6b553212db86e77\res\values\values.xml:251:5-69: AAPT: error: resource android:attr/fontVariationSettings not found.

~.gradle\caches\transforms-1\files-1.1\appcompat-v7-27.1.1.aar\b455673db66bf379c6b553212db86e77\res\values\values.xml:251:5-69: AAPT: error: resource android:attr/ttcIndex not found._

I am facing this issue.

app/build.gradle

android {
    compileSdkVersion 28
    buildToolsVersion '27.0.3'
    defaultConfig {
        applicationId "com.Marian"
        minSdkVersion 16
        targetSdkVersion 27
        versionCode 0016
        versionName "marianv0016"
        multiDexEnabled true


        lintOptions {
            abortOnError false
        }


        ndk {
            abiFilters "armeabi-v7a", "x86"
        }
}



dependencies {
   implementation project(':react-native-gesture-handler')
   implementation project(':react-native-push-notification')
   implementation fileTree(dir: "libs", include: ["*.jar"])
   implementation "com.android.support:appcompat-v7:27.1.1"
   implementation "com.android.support:support-core-utils:27.1.1"
   implementation project(':react-native-fcm')
   implementation 'com.google.firebase:firebase-core:16.0.9'
   implementation 'com.google.firebase:firebase-messaging:18.0.0'
   implementation ("com.facebook.react:react-native:+") { force = true }  // From node_modules
   implementation project(':realm')
   implementation project(':react-native-fs')
   implementation project(':react-native-vector-icons')
   implementation project(':react-native-image-picker')
   implementation project(':rn-fetch-blob')
   implementation project(':react-native-image-crop-picker')
   implementation project(':react-native-exit-app')
   implementation project(':react-native-onesignal')
   implementation project(':react-native-sensor-manager')
   implementation project(':react-native-smart-barcode')
   implementation project(':react-native-push-notification')
   implementation project(':react-native-linear-gradient')
   implementation project(':react-native-file-picker')
   implementation project(':react-native-doc-viewer')
   implementation project(':react-native-svg')
   implementation project(":react-native-google-signin")
   implementation project(':react-native-spinkit')
   implementation project(':react-native-pdf')
}

// apply plugin: 'com.google.gms.google-services'
// Run this once to be able to run the application with BUCK
// puts all compile dependencies into folder libs for BUCK to use
task copyDownloadableDepsToLibs(type: Copy) {
    from configurations.compile
    into 'libs'
}


configurations.all {
    resolutionStrategy.eachDependency { DependencyResolveDetails details ->
        def requested = details.requested
        if (requested.group == 'com.android.support') {
            if (!requested.name.startsWith("multidex")) {
                details.useVersion '27.1.1'
            }
        }
    }
}

apply plugin: 'com.google.gms.google-services'

build.gradle

buildscript {
     ext {
        googlePlayServicesAuthVersion = "12.0.1" // <--- use this version or newer
      //  firebaseVersion ="17.3.4"
    }
    repositories {
     google()
        jcenter()
    }
    dependencies {
    
        classpath 'com.google.gms:google-services:3.2.1'
        classpath 'com.android.tools.build:gradle:3.1.0'


    }
}

allprojects {
    repositories {
        google()
        mavenLocal()
        mavenLocal()
        // for modules depending on jitpack.io
        maven { url "https://jitpack.io" }
        // add this one
        maven {
            url "https://maven.google.com"
        }
        maven {
            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
             url "$rootDir/../node_modules/react-native/android"
          //   url 'https://maven.google.com'
        }
        jcenter()
    }
}

subprojects {
    afterEvaluate {project ->
        if (project.hasProperty("android")) {
            android {
                compileSdkVersion 27
                defaultConfig {
                    targetSdkVersion 27
                }
            }
        }
    }
}




subprojects {
    project.configurations.all {
        resolutionStrategy.eachDependency { details ->
            if (details.requested.group == 'com.android.support'
                    && !details.requested.name.contains('multidex') ) {
                details.useVersion "27.1.1"
            }
        }
    }
}

distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip

Why does it happens. Any idea hot to solve this ?

[shreyakupadhyay]

Until a fix for this comes, use the below procedure to fix the issue.

This happened because Google upgraded libraries for androidX and few react native projects also started supporting it. React Native version 0.60.0 will get support for these libraries, maybe not below that. So you have to use the lower versions for those android libraries. To solve, follow the procedure below.

1. Check what all react native projects are supporting androidX now.

$ gradlew app:dependencies

Search for androidX in the output. Get all the libraries having androidx. 2. Make a change in build.gradle inside android/app

configurations.all {
    resolutionStrategy { 
        force 'com.google.android.gms:play-services-gcm:16.1.0'
        force 'com.google.android.gms:play-services-basement:16.2.0'
        force 'com.google.android.gms:play-services-auth:16.0.1'
        force 'com.google.firebase:firebase-messaging:18.0.0'
        force 'com.google.firebase:firebase-common:17.0.0'        
        force 'com.google.firebase:firebase-iid:18.0.0'
        force 'com.google.android.gms:play-services-stats:16.0.1'
        force 'com.google.android.gms:play-services-base:16.0.1'
    }
}

These were the libraries that caused problem in my react native project. Google maintains all the releases here https://developers.google.com/android/guides/releases#may_07_2019 . You can choose any other version also. This solution solved issue in my case. Let me know if this helps.

[jitheshkt]

IF your project is on SDK version 27 simply add googlePlayServicesVersion=12.0.1 on top of the android/gradle.properties file.