android arch,错误：程序类型已存在：android.arch.lifecycle.LiveData

当我在Android Studio中按下运行按钮时，我的应用程序会编译但显示此错误(已编辑)：

Error:Program type already present: android.arch.lifecycle.LiveData

(完整日志)

I've tried deleting the .gradle folder, then going to Build > Clean Project and Build > Rebuild Project. However, it doesn't work. I've also tried deleting the source code, then cloning again from git and importing the folder to Android Studio. However, it still produces that error.

Here's my app's app/build.gradle:

apply plugin: 'com.android.application'

android {

compileSdkVersion 27

buildToolsVersion '27.0.3'

defaultConfig {

applicationId "com.edricchan.studybuddy"

minSdkVersion 24

targetSdkVersion 27

versionCode 8

versionName "1.0.0-rc.503"

testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

resConfigs "en"

multiDexEnabled true

}

buildTypes {

release {

minifyEnabled false

proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

}

}

dataBinding {

enabled = true

}

}

dependencies {

implementation 'com.android.support:support-v4:27.1.0'

implementation 'com.android.support:support-annotations:27.1.0'

implementation fileTree(dir: 'libs', include: ['*.jar'])

androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {

exclude group: 'com.android.support', module: 'support-annotations'

})

implementation 'com.android.support:appcompat-v7:27.1.0'

implementation 'com.android.support.constraint:constraint-layout:1.0.2'

implementation 'com.android.support:design:27.1.0'

implementation 'com.android.support:cardview-v7:27.1.0'

testImplementation 'junit:junit:4.12'

// Firebase stuff

implementation 'com.google.firebase:firebase-storage:11.8.0'

implementation 'com.google.firebase:firebase-firestore:11.8.0'

implementation 'com.google.firebase:firebase-auth:11.8.0'

implementation 'com.google.firebase:firebase-messaging:11.8.0'

implementation 'com.google.android.gms:play-services-auth:11.8.0'

implementation 'com.firebaseui:firebase-ui-auth:3.1.0'

implementation 'com.firebaseui:firebase-ui-firestore:3.1.0'

implementation 'com.firebaseui:firebase-ui-storage:3.1.0'

// Provide a way to update the app

implementation 'com.github.javiersantos:AppUpdater:2.6.4'

// Chrome Custom Tabs

implementation 'com.android.support:customtabs:27.1.0'

// The app's intro screen

implementation 'com.heinrichreimersoftware:material-intro:1.6.2'

// Use for new Material Text field boxes recently introduced

implementation 'com.github.HITGIF:TextFieldBoxes:1.3.7'

// Report an issue to Github without having to open a new tab and so on...

implementation 'com.heinrichreimersoftware:android-issue-reporter:1.3.1'

}

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

最佳答案

显然，这是预期的行为：

com.firebaseui：firebase-ui-firestore：3.1.0取决于android.arch.lifecycle：extensions：1.0.0-beta1。切换到版本3.2.2可以通过使用构建了支持库27.1.0的Lifecycle 1.1库来解决此问题。 -问题追踪器

For me, removing the firebase-ui dependencies solved the issue since I wasn't even using the library in the first place.