Exoplayer: android.support.annotation does not exist

[RootSoft]

I cloned ExoPlayer locally and added the modules to my existing project using my settings.gradle.

gradle.ext.exoplayerRoot = 'path/to/exoplayer'
gradle.ext.exoplayerModulePrefix = 'exoplayer-'
apply from: new File(gradle.ext.exoplayerRoot, 'core_settings.gradle')

Whenever I try to build the project, I receive the following build error:

error: package android.support.annotation does not exist

These happen for all @NonNull and @Nullable annotations in the ExoPlayer modules.

build.gradle

android {
    compileSdkVersion 28
    def versionMajor = 1
    def versionMinor = 0
    def versionPatch = 0

    defaultConfig {
        applicationId "packagename"
        minSdkVersion 23
        targetSdkVersion 28
        versionCode versionMajor * 10000 + versionMinor * 100 + versionPatch
        versionName "${versionMajor}.${versionMinor}.${versionPatch}"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        vectorDrawables.useSupportLibrary = true
    }

    dataBinding {
        enabled = true
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {
    implementation 'com.android.support:support-annotations:28.0.0'
    implementation project(':exoplayer-library-core')
}

gradle.properties

android.databinding.enableV2=true
android.useAndroidX=true
android.enableJetifier=true

Top-level build.gradle

// 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:3.2.1'

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

allprojects {
    repositories {
        google()
        jcenter()
        maven { url "https://jitpack.io" }
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

[ojw28]

Does your own project's root gradle file specify the google repository, like here (and possibly also here)? I think it needs to.

[RootSoft]

I updated the original post with my top-level build.gradle file. The google repository is defined in both cases. I also tried it with a new, fresh project, it seems to have troubles with the Android Jetifier and AndroidX support. When I comment these out if a fresh, new project, I don't seem to have the issue.

[ojw28]

Looking again, I don't really understand the first build.gradle. Shouldn't the dependencies at the bottom be in a

dependencies {
  ...
}

block?

[RootSoft]

@ojw28 They are in the dependencies block, something went wrong with c/p

[RootSoft]

@ojw28 I just created a fresh, new project and have the same issue.

Android Studio 3.2.1

build.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.rootsoft.exoplayer.demo"
        minSdkVersion 26
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }

    dataBinding {
        enabled = true
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

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

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation 'com.android.support:design:28.0.0'
    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 project(':exoplayer-library-core')
}

settings.gradle

gradle.ext.exoplayerRoot = '/Users/RootSoft/Projects/ExoPlayer/ExoPlayer'
gradle.ext.exoplayerModulePrefix = 'exoplayer-'
apply from: new File(gradle.ext.exoplayerRoot, 'core_settings.gradle')

include ':app'

gradle.properties

org.gradle.jvmargs=-Xmx1536m
android.databinding.enableV2=true
android.useAndroidX=true
android.enableJetifier=true

Whenever I remove the following from my gradle.properties file, it works fine:

android.useAndroidX=true
android.enableJetifier=true

[RootSoft]

@ojw28 Do you have any idea what might be wrong? I've been breaking my heads on this for the past few days. Thanks in advance!

[ojw28]

I tried doing what you did and it works fine for me.

[RootSoft]

For some reason it seems that Jetifier does not convert the dependencies to the new AndroidX (atleast for me) for the library modules.

[RootSoft]

I managed to solve the issue by specifying a gradle.properties file for every local exoplayer module in my project that is used in the application. I still don't know what causes the issue, but preventing Jetifier from migrating to AndroidX seems to solve this issue.

# Local module Gradle settings.
android.useAndroidX=false
# Jetifier will convert support libraries of all your dependencies to AndroidX automatically,
# if you don't set it true then your project will have both support
android.enableJetifier=false

[Behrouz-m]

I managed to solve the issue by specifying a gradle.properties file for every local exoplayer module in my project that is used in the application. I still don't know what causes the issue, but preventing Jetifier from migrating to AndroidX seems to solve this issue.

# Local module Gradle settings.
android.useAndroidX=false
# Jetifier will convert support libraries of all your dependencies to AndroidX automatically,
# if you don't set it true then your project will have both support
android.enableJetifier=false

U can use these dependencies too:

implementation 'androidx.appcompat:appcompat:1.0.2'
 implementation 'androidx.annotation:annotation:1.0.2'

[bluefirepatrick]

@ray-pixar Could you explain exactly where you put those dependencies? Is it in the android-exoplayer folder under node-modules? Or somewhere else?