After upgrading Android Studio, a project with no issues started showing issues in the editor. I have lots of Unresolved Reference errors. Anything under the support libraries (support-v4, support-v7).
In the screen capture above, anything showing in red isn't resolving and showing as an error. I am also using Lifecycle components and Room database. They seem to have issues as well. Looks like interfaces can be found but classes can't.
For example, in one of my classes using Room,
android.arch.persistence.room.Database and android.arch.persistence.room.TypeConverters resolve correctly, but
android.arch.persistence.room.Room and android.arch.persistence.room.RoomDatabase do not.
Note: The project builds and runs fine on Android emulators and devices without any issues. It builds and runs using the build button on Android Studio without any errors. I'm not getting any Class not found errors. This is just an issue inside the Android Studio editor. I have already restarted Android Studio, cleaned and rebuilt the project.
Here's my project build file:
buildscript {
ext.kotlin_version = '1.2.70'
ext.serialization_version = '0.6.2'
ext.gradle_plugin_version = '3.2.0'
repositories {
google()
jcenter()
maven { url "https://jitpack.io" }
maven { url "https://kotlin.bintray.com/kotlinx" }
}
dependencies {
classpath "com.android.tools.build:gradle:3.2.1"
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
classpath "org.jetbrains.kotlinx:kotlinx-gradle-serialization-plugin:$serialization_version"
}
}
allprojects {
repositories {
google()
jcenter()
maven { url 'https://jitpack.io' }
maven { url "https://kotlin.bintray.com/kotlinx" }
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
ext {
roomVersion = '1.1.1'
archLifecycleVersion = '1.1.1'
buildToolsVersion = '28.0.3'
supportLibVersion = '28.0.0'
}
And module build file:
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'
apply plugin: 'kotlinx-serialization'
android {
compileSdkVersion 28
defaultConfig {
applicationId "com.example.project"
minSdkVersion 19
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
vectorDrawables.useSupportLibrary = true
multiDexEnabled true
kapt {
arguments {
arg("room.schemaLocation", "$projectDir/schemas".toString())
}
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
flavorDimensions 'version'
productFlavors {
live {
dimension 'version'
}
dev {
dimension 'version'
versionNameSuffix '-dev'
}
}
buildToolsVersion "$rootProject.buildToolsVersion"
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
dataBinding {
enabled = true
}
}
kotlin {
experimental {
coroutines 'enable'
}
}
dependencies {
implementation "com.android.support:multidex:1.0.3"
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
implementation "org.jetbrains.kotlinx:kotlinx-serialization-runtime:$serialization_version"
// Support and google services
implementation "com.android.support:support-compat:$rootProject.supportLibVersion"
implementation "com.android.support:support-core-utils:$rootProject.supportLibVersion"
implementation "com.android.support:support-core-ui:$rootProject.supportLibVersion"
implementation "com.android.support:support-media-compat:$rootProject.supportLibVersion"
implementation "com.android.support:support-fragment:$rootProject.supportLibVersion"
implementation "com.android.support:design:$rootProject.supportLibVersion"
implementation "com.android.support:appcompat-v7:$rootProject.supportLibVersion"
implementation "com.android.support:gridlayout-v7:$rootProject.supportLibVersion"
implementation "com.android.support:preference-v7:$rootProject.supportLibVersion"
implementation "com.android.support.constraint:constraint-layout:1.1.3"
implementation "com.android.support:support-annotations:$rootProject.supportLibVersion"
implementation "com.android.support:support-vector-drawable:$rootProject.supportLibVersion"
implementation "com.android.support:recyclerview-v7:$rootProject.supportLibVersion"
implementation "com.google.android.gms:play-services-plus:15.0.1"
// Rx
implementation "io.reactivex.rxjava2:rxandroid:2.1.0"
implementation "io.reactivex.rxjava2:rxjava:2.2.2"
// Retrofit
implementation "com.google.code.gson:gson:2.8.5"
implementation "com.squareup.retrofit2:retrofit:2.4.0"
implementation "com.squareup.retrofit2:converter-gson:2.4.0"
implementation "com.squareup.retrofit2:adapter-rxjava2:2.4.0"
implementation "com.squareup.okhttp3:logging-interceptor:3.11.0"
// Testing
testImplementation "junit:junit:4.12"
androidTestImplementation "com.android.support.test:runner:1.0.2"
androidTestImplementation "com.android.support.test.espresso:espresso-core:3.0.2"
///---
// java 8
implementation "android.arch.lifecycle:common-java8:$archLifecycleVersion"
// Room components
implementation "android.arch.persistence.room:runtime:$rootProject.roomVersion"
annotationProcessor "android.arch.persistence.room:compiler:$rootProject.roomVersion"
androidTestImplementation "android.arch.persistence.room:testing:$rootProject.roomVersion"
kapt "android.arch.persistence.room:compiler:$rootProject.roomVersion"
// Lifecycle components
implementation "android.arch.lifecycle:extensions:$rootProject.archLifecycleVersion"
kapt "android.arch.lifecycle:compiler:$rootProject.archLifecycleVersion"
annotationProcessor "android.arch.lifecycle:compiler:$rootProject.archLifecycleVersion"
}
