Androidstudio报错记录

Android studio3.6.1版本没有Preview！！！
唯一能预览的地方只有

还有要注意gradle这个按钮千万不要按（按了之后会变灰）

FAILURE: Build failed with an exception.
What went wrong:
Could not determine the dependencies of task ‘:app:lintVitalRelease’.
Could not resolve all task dependencies for configuration ‘:app:lintClassPath’.
Could not resolve com.android.tools.lint:lint-gradle:26.6.1.
Required by:
project :app
No cached version of com.android.tools.lint:lint-gradle:26.6.1 available for offline mode.
No cached version of com.android.tools.lint:lint-gradle:26.6.1 available for offline mode.
Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
Get more help at https://help.gradle.org
BUILD FAILED in 5s

按了的话，build的时候会报错！

原因是gradle处于离线状态（offline），然后就下载不了库，不能进行Build。

https://blog.csdn.net/shenshibaoma/article/details/104588563

如果网络不是很好，经常导致gradle下载慢，超时，或者访问jcenter超时，可以使用下面的阿里云镜像。

将上面的内容替换就可以了。

buildscript {
	repositories {
		maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
		maven { url 'http://maven.aliyun.com/nexus/content/repositories/jcenter' }
		maven { url 'http://maven.aliyun.com/nexus/content/repositories/google' }
		maven { url 'http://maven.aliyun.com/nexus/content/repositories/gradle-plugin' }
	}
	dependencies {
		classpath 'com.android.tools.build:gradle:3.6.1'
	}
}

allprojects {
	repositories {
		maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
		maven { url 'http://maven.aliyun.com/nexus/content/repositories/jcenter' }
		maven { url 'http://maven.aliyun.com/nexus/content/repositories/google' }
		maven { url 'http://maven.aliyun.com/nexus/content/repositories/gradle-plugin' }
	}
}

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

buildscript {
	repositories {
		// google()
		// jcenter()
		maven { url 'https://maven.aliyun.com/repository/public/' }
		maven { url 'https://maven.aliyun.com/repository/google/'}
		maven { url 'https://maven.aliyun.com/repository/jcenter/'}
		mavenLocal()
		mavenCentral()
	}
	dependencies {
		classpath 'com.android.tools.build:gradle:3.6.1'
		
		// NOTE: Do not place your application dependencies here; they belong
		// in the individual module build.gradle files
	}
}

allprojects {
	repositories {
		// google()
		// jcenter()
		maven { url 'https://maven.aliyun.com/repository/public/' }
		maven { url 'https://maven.aliyun.com/repository/google/'}
		maven { url 'https://maven.aliyun.com/repository/jcenter/'}
		mavenLocal()
		mavenCentral()
	}
}

task clean(type: Delete) {
	delete rootProject.buildDir
}