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FAILURE: Build failed with an exception.

* Where:
Build file 'D:\google\flutter\.pub-cache\hosted\pub.flutter-io.cn\amap_core_fluttify-0.5.3+356f11c\android\build.gradle' line: 48

* What went wrong:
A problem occurred evaluating root project 'amap_core_fluttify'.
> Cannot convert a null value to an object of type Dependency.
  The following types/formats are supported:
    - Instances of Dependency.
    - String or CharSequence values, for example 'org.gradle:gradle-core:1.0'.
    - Maps, for example [group: 'org.gradle', name: 'gradle-core', version: '1.0'].
    - FileCollections, for example files('some.jar', 'someOther.jar').
    - Projects, for example project(':some:project:path').
    - ClassPathNotation, for example gradleApi().

  Comprehensive documentation on dependency notations is available in DSL reference for DependencyHandler type.

* 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 1s


The plugin amap_core_fluttify could not be built due to the issue above.

解决方法：
找到项目目录：android/build.gradle

图片.png

subprojects {
    afterEvaluate {project ->
        if (project.hasProperty("android")) {
            android {
                compileSdkVersion 29
            }
        }
    }
}

整体文件如下：

buildscript {
    ext.kotlin_version = '1.3.50'
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.mob.sdk:MobSDK:+'
    }
}

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

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}
subprojects {
    afterEvaluate {project ->
        if (project.hasProperty("android")) {
            android {
                compileSdkVersion 29
            }
        }
    }
}


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

图片.png