android - Android Studio离线添加 `Android plugin for Gradle`

Question

我将Android Studio 3.1.2与Gradle 4.4结合使用，并且不得不强制Gradle进行离线工作，因为当我正常(在线)使用它时，同步需要很长时间，并且失败。起初我得到这个错误:

No cached version of com.android.tools.build:gradle:3.1.2 available for offline mode.
Disable Gradle 'offline mode' and sync project

所以我下载了gradle-3.1.2.jar，将其放在<project root>/libs/中，然后将项目的build.gradle更改为以下状态:

buildscript {

    repositories {
        google()
        jcenter()
        flatDir {
            dirs 'libs'
        }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.2'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

现在看来以前的错误已解决，但又引发了另一个错误:

Unable to load class 'com.android.tools.lint.gradle.api.ToolingRegistryProvider'.
Possible causes for this unexpected error include:<ul><li>Gradle's dependency cache may be corrupt (this sometimes occurs after a network connection timeout.)
Re-download dependencies and sync project (requires network)</li><li>The state of a Gradle build process (daemon) may be corrupt. Stopping all Gradle daemons may solve this problem.
Stop Gradle build processes (requires restart)</li><li>Your project may be using a third-party plugin which is not compatible with the other plugins in the project or the version of Gradle requested by the project.</li></ul>In the case of corrupt Gradle processes, you can also try closing the IDE and then killing all Java processes.

我该如何解决这个问题？

编辑

我知道正常的方式是在线工作，至少对于第一个版本。但是必须有一种离线添加的方法。不是这样吗？

Answer 1

这来自this link的android studio手册。

Turn on Offline Mode for Gradle: If you have limited bandwitch, turn on Offline Mode to prevent Gradle from attempting to download missing dependencies during your build. When Offline Mode is on, Gradle will issue a build failure if you are missing any dependencies, instead of attempting to download them. To turn on Offline Mode, proceed as follows:

单击文件>设置(在Mac上为Android Studio>首选项)以
打开设置对话框。

在左 Pane 中，展开“构建，执行，部署”，然后单击“确定”。
Gradle 。

在“全局Gradle”设置下，选中“脱机工作”复选框。

单击“应用”或“确定”使更改生效。