Program type already present: android.support.v4.media.MediaBrowserCompat$ConnectionCallback$StubApi21

Question

Received this error after updating android to preview p and adding material design library. refactored to suggested androidx namespaces.

here is my app.gradle file

apply plugin: 'kotlin-android' apply plugin: 'io.fabric' apply plugin: 'com.android.application'

buildscript {
repositories {
    maven { url 'https://maven.fabric.io/public' }
}

dependencies {
    classpath 'io.fabric.tools:gradle:1.25.4'
}

}

android {
lintOptions {
    checkReleaseBuilds false;
    abortOnError false
}

compileSdkVersion 'android-P'
useLibrary 'org.apache.http.legacy'

defaultConfig {
    applicationId "datazeo.android.dzreader"
    minSdkVersion 21

    targetSdkVersion 27

}

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

}

repositories {
mavenCentral()

maven {
    url 'https://maven.fabric.io/public'
}

}

dependencies {
implementation 'com.google.firebase:firebase-crash:15.0.2'
implementation 'com.google.firebase:firebase-core:15.0.2'
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'org.jetbrains.anko:anko-common:0.9'
implementation 'com.commit451:PhotoView:1.2.4'
implementation('com.crashlytics.sdk.android:crashlytics:2.9.1') {
    transitive = true;

}
implementation 'com.google.android.material:material:1.0.0-alpha1'
implementation 'androidx.appcompat:appcompat:1.0.0-alpha1'
implementation 'androidx.legacy:legacy-support-v4:1.0.0-alpha1'
implementation 'androidx.legacy:legacy-support-core-utils:1.0.0-alpha1'

}

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

Answer 1

Specifically, I solved the problem by following on what's been described in this post. Although the post didn't tell us how to solve that problem, it actually is necessary for everything to work fine when using the new AndroidX library.

Just add the two lines below to gradle.properties file.

android.useAndroidX=true
android.enableJetifier=true

As for my case, simply updating the IDE to Android Studio Canary or even Android Studio Beta 1 doesn't solve the problem.

Answer 2

Updating to android canary preview solved this issue for me.