官方提供的方案

1. Open <host>/app/build.gradle
2. Ensure you have the repositories configured, otherwise add them:

      repositories {
        maven {
            url '/Users/walkingMen/android_project/queen/queen_flutter_boost/build/host/outputs/repo'
        }
        maven {
            url 'http://download.flutter.io'
        }
      }

3. Make the host app depend on the Flutter module:

    dependencies {
      debugImplementation 'com.iksocial.queen_flutter:flutter_debug:1.0
      profileImplementation 'com.iksocial.queen_flutter:flutter_profile:1.0
      releaseImplementation 'com.iksocial.queen_flutter:flutter_release:1.0
    }

4. Add the profile build type:

    android {
      buildTypes {
        profile {
          initWith debug
        }
      }
    }

aar方案：不依赖本地仓库

step1:
找到flutter根目录下的build/host/outputs/repo，将flutter_release-1.0.aar复制到android项目下
step2:
找到flutter根目录下的build/host/outputs/repo, 将flutter_release-1.0.pom，里面有如下flutter基础库的地址

<dependency>
  <groupId>io.flutter</groupId>
  <artifactId>flutter_embedding_release</artifactId>
  <version>1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c</version>
  <scope>compile</scope>
</dependency>
<dependency>
  <groupId>io.flutter</groupId>
  <artifactId>armeabi_v7a_release</artifactId>
  <version>1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c</version>
  <scope>compile</scope>
</dependency>

step3:
/app/build.gradle下添加

repositories {
        maven {
            url 'http://download.flutter.io'
        }
      }
dependencies {
    implementation(name: 'flutter_release-1.0', ext: 'aar')
    implementation 'io.flutter:flutter_embedding_release:1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c'
    implementation 'io.flutter:armeabi_v7a_release:1.0.0-e1e6ced81d029258d449bdec2ba3cddca9c2ca0c'
    }

aar方案无非就是直接将flutter基础库引入进来。