Android Studio添加aar依赖的两种方式

1.方法一：在app的build.gradle中明确指定

android{
repositories {
flatDir {
dirs 'libs'
}
}
}
dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation (name: 'barcode_scanner_library_v2.3.2.0', ext: 'aar')
}

2、方法二：

android{
//不用写
/* repositories {
flatDir {
dirs 'libs'
}
}/
}
dependencies {
　 将
implementation fileTree(dir: 'libs', include: ['.jar'])
改为
implementation fileTree(dir: 'libs', include: ['.jar','.aar'])
}