(1)刚建好一个demo 编译运行一个demo 控制台就出现如下情况
Launching lib/main.dart on Android SDK built for x86 in debug mode...
Initializing gradle...
Resolving dependencies...
* Error running Gradle:
ProcessException: Process "/Users/xxx/develop/android/flutter_app/android/gradlew" exited abnormally:
Project evaluation failed including an error in afterEvaluate {}. Run with --stacktrace for details of the afterEvaluate {} error.
FAILURE: Build failed with an exception.
* Where:
Build file '/Users/xxx/develop/android/flutter_app/android/app/build.gradle' line: 25
* What went wrong:
A problem occurred evaluating project ':app'.
> Could not resolve all files for configuration 'classpath'.
> Could not find lint-gradle-api.jar (com.android.tools.lint:lint-gradle-api:26.1.2).
Searched in the following locations:
https://jcenter.bintray.com/com/android/tools/lint/lint-gradle-api/26.1.2/lint-gradle-api-26.1.2.jar
* 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 0s
Command: /Users/rabbit/develop/android/flutter_app/android/gradlew app:properties
Finished with error: Please review your Gradle project setup in the android/ folder.
解决办法:
修改build.gradle,注释掉jcenter(),google()。使用阿里的镜像。原因是jcenter google库无法访问到导致的问题。
buildscript {
repositories {
//google()
//jcenter()
maven { url 'https://maven.aliyun.com/repository/google' }
maven { url 'https://maven.aliyun.com/repository/jcenter' }
maven { url 'http://maven.aliyun.com/nexus/content/groups/public' }
}
dependencies {
classpath 'com.android.tools.build:gradle:3.1.2'
}
}
allprojects {
repositories {
//google()
//jcenter()
maven { url 'https://maven.aliyun.com/repository/google' }
maven { url 'https://maven.aliyun.com/repository/jcenter' }
maven { url 'http://maven.aliyun.com/nexus/content/groups/public' }
}
}
(2)如果出现gradle版本问题,即之前开发Android项目gradle版本为低版本,装的最新的flutter中gradle版本为高版本,这时就要对gradle版本进行更换,文件目录为:/flutter/packages/flutter_tools/gradle
更改示例如下:
buildscript {
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.2.1'
}
}
(3)如果出现如下图第一个红框所示的报错
解决方案如下:
执行命令:
flutter doctor --android-licenses
当提示是否接受许可时,输入y
确认即可
如果执行该命令时,报错,提示如下时:
A newer version of the Android SDK is required. To update,
run: /Users/***/Android/sdk/tools/bin/sdkmanager --update
需要先执行
/Users/***/Android/sdk/tools/bin/sdkmanager --update
然后再执行
flutter doctor --android-licenses
再次执行flutter doctor
,可以看到关于Android license
的报错已经没有了