今天我在android studio开始了一个新项目。一切顺利,没有错误。添加项目后,我使用Android工作室中的Firebase助手工具将项目与Firebase实时数据库连接。
然后我收到此错误:
Error:Execution failed for task ':app:preDebugAndroidTestBuild'.
> Conflict with dependency 'com.android.support:support-annotations' in project ':app'. Resolved versions for app (23.0.0) and test app (25.4.0) differ. See https://d.android.com/r/tools/test-apk-dependency-conflicts.html for details.
我发现错误主要来自在我的应用级build.gradle
文件末尾添加此行。因为当我评论它时,它构建得很好。
apply plugin: 'com.google.gms.google-services'
我对gradle建筑系统了解不多。仅连接到firebase并添加firebase-database依赖项可能有什么问题。
我的应用:build.gradle
:
apply plugin: 'com.android.application'
android {
compileSdkVersion 27
defaultConfig {
applicationId "com.learning.insanes.chothavandar"
minSdkVersion 21
targetSdkVersion 27
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
// implementation 'com.google.firebase:firebase-database:11.6.0'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.1'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}
apply plugin: 'com.google.gms.google-services'
我的项目: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:3.0.1'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
classpath 'com.google.gms:google-services:3.1.1'
}
}
allprojects {
repositories {
google()
jcenter()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
答案 0 :(得分:2)
试试这个:
androidTestCompile ("com.android.support.test.espresso:espresso-core:3.0.1") {
exclude group: 'com.android.support', module: 'support-annotations'
}
请查看此link以获得更好的理解
答案 1 :(得分:-1)
在您的应用中:依赖项中的build.gradle文件添加以下行,或者如果已经将其更改为:
依赖{ .. 实施' com.android.support:appcompat-v7:25.4.0' .. }