问题：安卓真机运行拉不下kotlin

解决：替换为阿里源，路径：android->build.gradle

buildscript {
    repositories {
//        google()
//        mavenCentral()
        maven { url 'https://maven.aliyun.com/repository/google' }
        maven { url 'https://maven.aliyun.com/repository/jcenter' }
        maven { url 'https://maven.aliyun.com/nexus/content/groups/public' }
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:4.1.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.20"
    }
}

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

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
    project.evaluationDependsOn(':app')
}

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

image.png

在android->app->src->main->AndroidManifest.xml中新增一行android:exported="true"

image.png

最后

在根目录user/.gradle (option+command+. 显示隐藏文件)文件中新增一个文件 init.gradle，具体内容如下

gradle.projectsLoaded {
    rootProject.allprojects {
        buildscript {
            repositories {
                def JCENTER_URL = 'https://maven.aliyun.com/repository/jcenter'
                def GOOGLE_URL = 'https://maven.aliyun.com/repository/google'
                def NEXUS_URL = 'https://maven.aliyun.com/nexus/content/repositories/jcenter'
                all { ArtifactRepository repo ->
                    if (repo instanceof MavenArtifactRepository) {
                        def url = repo.url.toString()
                        if (url.startsWith('https://jcenter.bintray.com/')) {
                            project.logger.lifecycle "Repository ${repo.url} replaced by $JCENTER_URL."
                            println("buildscript ${repo.url} replaced by $JCENTER_URL.")
                            remove repo
                        }
                        else if (url.startsWith('https://dl.google.com/dl/android/maven2/')) {
                            project.logger.lifecycle "Repository ${repo.url} replaced by $GOOGLE_URL."
                            println("buildscript ${repo.url} replaced by $GOOGLE_URL.")
                            remove repo
                        }
                        else if (url.startsWith('https://repo1.maven.org/maven2')) {
                            project.logger.lifecycle "Repository ${repo.url} replaced by $REPOSITORY_URL."
                            println("buildscript ${repo.url} replaced by $REPOSITORY_URL.")
                            remove repo
                        }
                    }
                }
                jcenter {
                    url JCENTER_URL
                }
                google {
                    url GOOGLE_URL
                }
                maven {
                    url NEXUS_URL
                }
            }
        }
        repositories {
            def JCENTER_URL = 'https://maven.aliyun.com/repository/jcenter'
            def GOOGLE_URL = 'https://maven.aliyun.com/repository/google'
            def NEXUS_URL = 'https://maven.aliyun.com/nexus/content/repositories/jcenter'
            all { ArtifactRepository repo ->
                if (repo instanceof MavenArtifactRepository) {
                    def url = repo.url.toString()
                    if (url.startsWith('https://jcenter.bintray.com/')) {
                        project.logger.lifecycle "Repository ${repo.url} replaced by $JCENTER_URL."
                        println("buildscript ${repo.url} replaced by $JCENTER_URL.")
                        remove repo
                    }
                    else if (url.startsWith('https://dl.google.com/dl/android/maven2/')) {
                        project.logger.lifecycle "Repository ${repo.url} replaced by $GOOGLE_URL."
                        println("buildscript ${repo.url} replaced by $GOOGLE_URL.")
                        remove repo
                    }
                    else if (url.startsWith('https://repo1.maven.org/maven2')) {
                        project.logger.lifecycle "Repository ${repo.url} replaced by $REPOSITORY_URL."
                        println("buildscript ${repo.url} replaced by $REPOSITORY_URL.")
                        remove repo
                    }
                }
            }
            jcenter {
                url JCENTER_URL
            }
            google {
                url GOOGLE_URL
            }
            maven {
                url NEXUS_URL
            }
        }
    }
} 

可以愉快运行了

安卓打包：
https://blog.csdn.net/niceyoo/article/details/92836860?utm_medium=distribute.pc_relevant.none-task-blog-2_defaultbaidujs_baidulandingword~default-0-92836860-blog-117258081.pc_relevant_default&spm=1001.2101.3001.4242.1&utm_relevant_index=3

https://blog.csdn.net/xiaolaohuqwer/article/details/117258081?spm=1001.2101.3001.6661.1&utm_medium=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-1-117258081-blog-123257525.pc_relevant_aa&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-1-117258081-blog-123257525.pc_relevant_aa&utm_relevant_index=1