blocks|key|4358118|text|我已经通过更新我的应用程序build.gradle文件修复了这个问题，如下所示：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4358119|//+Top-level+build+file+where+you+can+add+configuration+options+common+to+all+sub-projects/modules.

buildscript+{
++++repositories+{
++++++++jcenter()
++++}
++++dependencies+{
++++++++classpath+'com.android.tools.build:gradle:3.0.0-alpha2'
++++++++//+NOTE:+Do+not+place+your+application+dependencies+here;+they+belong
++++++++//+in+the+individual+module+build.gradle+files
++++}
}

allprojects+{
++++repositories+{
++++++++jcenter()
++++++++maven+{+url+'https://maven.google.com'+}
++++}
}

task+clean(type:+Delete)+{
++++delete+rootProject.buildDir
}|code-block|syntax|javascript|4358120|实际上必须从buildscript存储库中删除maven存储库，并将其添加到allprojects存储库，如上所示。此外，您可以将maven存储库保存在这两个位置，但必须将其包含在allprojects存储库中才能修复该问题。|4358121|entityMap^0|D|C|0|0|6|B|12|B|2I|B|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|N|$]]

I have fixed the issue by updating my app <code>build.gradle</code> file like below:

<pre><code>// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
 repositories {
 jcenter()
 }
 dependencies {
 classpath 'com.android.tools.build:gradle:3.0.0-alpha2'
 // NOTE: Do not place your application dependencies here; they belong
 // in the individual module build.gradle files
 }
}

allprojects {
 repositories {
 jcenter()
 maven { url 'https://maven.google.com' }
 }
}

task clean(type: Delete) {
 delete rootProject.buildDir
}
</code></pre>

Actually had to remove the maven repository from <code>buildscript</code> repositories and added to <code>allprojects</code> repositories as shown above. Also you can keep the maven repository at both places but must include in <code>allprojects</code> repositories to fix the issue.

blocks|key|4357800|text|可以将"https://maven.google.com“改为"https://dl.google.com/dl/android/maven2/”来解决问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4357801|entityMap|0|LINK|mutability|MUTABLE|url|https://maven.google.com/|1|https://dl.google.com/dl/android/maven2/^0|4|O|0|W|14|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

you can change "<a href="https://maven.google.com" rel="nofollow noreferrer">https://maven.google.com</a>" to "<a href="https://dl.google.com/dl/android/maven2/" rel="nofollow noreferrer">https://dl.google.com/dl/android/maven2/</a>" to solve the problem.

blocks|key|4358145|text|添加应用程序/gradle文件|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4358146|compile+"android.arch.lifecycle:extensions:1.0.0-alpha4"
compile+"android.arch.persistence.room:runtime:1.0.0-alpha4"
annotationProcessor+"android.arch.lifecycle:compiler:1.0.0-alpha4"
annotationProcessor+"android.arch.persistence.room:compiler:1.0.0-alpha4"|code-block|syntax|javascript|4358147|将maven添加到基于gradle的项目中|4358148|allprojects+{
repositories+{
++++jcenter()
++++maven+{+url+'https://maven.google.com'+}
}
}|4358149|它将很容易编译。|4358150|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Add in app/gradle file

<pre><code>compile "android.arch.lifecycle:extensions:1.0.0-alpha4"
compile "android.arch.persistence.room:runtime:1.0.0-alpha4"
annotationProcessor "android.arch.lifecycle:compiler:1.0.0-alpha4"
annotationProcessor "android.arch.persistence.room:compiler:1.0.0-alpha4"
</code></pre>

add maven to project based gradle

<pre><code>allprojects {
repositories {
 jcenter()
 maven { url 'https://maven.google.com' }
}
}
</code></pre>

it will compile easily

blocks|key|4357839|text|您需要最新的gradle版本'com.android.tools.build:gradle:3.0.0-alpha2‘和Studio版本3.0%2B才能使用房间|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4357840|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You require latest gradle version 'com.android.tools.build:gradle:3.0.0-alpha2' and Studio Version 3.0+ to use Room

blocks|key|4357865|text|只需将maven+{+url+'https://maven.google.com'+}添加到您的项目gradle中|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4357866|entityMap^0|3|14|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Just add <code>maven { url 'https://maven.google.com' }</code> to your project gradle

blocks|key|4357904|text|打开mac首选项或您可以打开windows设置，然后在打开的窗口中搜索代理设置，然后取消选中代理身份验证即可工作|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4357905|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

open preference for mac or you can open setting for windows then search proxy setting inside the open window then unchecked proxy authentication it will work

blocks|key|4358260|text|我发现解决方案与我一起工作房间对房间的依赖关系，包括测试室迁移和房间RxJava|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4358261|dependencies+{
++++def+room_version+=+"1.1.1"

++++implementation+"android.arch.persistence.room:runtime:$room_version"
++++annotationProcessor+"android.arch.persistence.room:compiler:$room_version"+//+use+kapt+for+Kotlin

++++//+optional+-+RxJava+support+for+Room
++++implementation+"android.arch.persistence.room:rxjava2:$room_version"

++++//+optional+-+Guava+support+for+Room,+including+Optional+and+ListenableFuture
++++implementation+"android.arch.persistence.room:guava:$room_version"

++++//+Test+helpers
++++testImplementation+"android.arch.persistence.room:testing:$room_version"
}|code-block|syntax|javascript|4358262|正如文档所说：https://developer.android.com/topic/libraries/architecture/adding-components|offset|length|4358263|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.android.com/topic/libraries/architecture/adding-components^0|0|0|7|24|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

am find solution work with me Room
Dependencies for Room, including testing Room migrations and Room RxJava

<pre><code>dependencies {
 def room_version = "1.1.1"

 implementation "android.arch.persistence.room:runtime:$room_version"
 annotationProcessor "android.arch.persistence.room:compiler:$room_version" // use kapt for Kotlin

 // optional - RxJava support for Room
 implementation "android.arch.persistence.room:rxjava2:$room_version"

 // optional - Guava support for Room, including Optional and ListenableFuture
 implementation "android.arch.persistence.room:guava:$room_version"

 // Test helpers
 testImplementation "android.arch.persistence.room:testing:$room_version"
}
</code></pre>

as the document says: <a href="https://developer.android.com/topic/libraries/architecture/adding-components" rel="nofollow noreferrer">https://developer.android.com/topic/libraries/architecture/adding-components</a>

I am building a project in android studio 3.0 with android plugin <code>'com.android.tools.build:gradle:3.0.0-alpha1'</code> and gradle version <code>gradle-4.0-milestone-1-all.zip</code>.

Used maven repo as well:

<pre><code>maven {
 url 'https://maven.google.com'
 }
</code></pre>

Also, Using android Room persistence and lifecycle in my project. Already declared below dependencies in my app gradle file:

<pre><code>compile "android.arch.lifecycle:extensions:1.0.0-alpha1"
compile "android.arch.persistence.room:runtime:1.0.0-alpha1"
annotationProcessor "android.arch.lifecycle:compiler:1.0.0-alpha1"
annotationProcessor "android.arch.persistence.room:compiler:1.0.0-alpha1"
</code></pre>

When Sync and build the project it's showing below error:

<code>Failed to resolve: android.arch.lifecycle:extensions:1.0.0-alpha1</code>

Am I missing something or any other solution for this issue.

Failed to resolve: android.arch.lifecycle:extensions:1.0.0-alpha1 android studio 3.0

我正在用android plugin 'com.android.tools.build:gradle:3.0.0-alpha1'和gradle版gradle-4.0-milestone-1-all.zip在android studio 3.0中构建一个项目。也使用了maven repo：maven {         ...

问解析失败: android.arch.lifecycle:extensions:1.0.0-alpha1 android studio 3.0
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