集成流程

android studio 命令行，输入如下命令

flutter create -t module my_flutter

相当于创建了一个flutter的moudle

需要满足jdk要求,添加如下片段（app gradle）

android {
    compileOptions {//flutter 需要这样声明
        sourceCompatibility 1.8
        targetCompatibility 1.8
    }
}

因为flutter是一个moudle，所以需要在主工程添加依赖

1、在原应用的setting.gradle下添加如下代码

setBinding(new Binding([gradle: this]))                            
evaluate(new File(                                                     
        settingsDir,    //若做为原应用的子mudule，则为settingsDir
        'my_flutter/.android/include_flutter.groovy'                        
))

2、添加依赖

implementation project(':flutter')

添加混淆配置

-keep class io.flutter.app.** { *; }
-keep class io.flutter.plugin.**  { *; }
-keep class io.flutter.util.**  { *; }
-keep class io.flutter.view.**  { *; }
-keep class io.flutter.**  { *; }
-keep class io.flutter.plugins.**  { *; }

遇到的问题

查看flutter.gradleflutter.gradle文件，得知默认main module name是app，而当前demo是sample，所以需要在配置文件中，指定mainModuleName

ext {
    mainModuleName = 'sample'
}

相关flutter逻辑(include_flutter.groovy)

gradle.getGradle().projectsLoaded { g ->
    g.rootProject.beforeEvaluate { p ->
        _mainModuleName = binding.variables['mainModuleName']
        if (_mainModuleName != null && !_mainModuleName.empty) {
            p.ext.mainModuleName = _mainModuleName
        }
    }
    g.rootProject.afterEvaluate { p ->
        p.subprojects { sp ->
            if (sp.name != 'flutter') {
                sp.evaluationDependsOn(':flutter')
            }
        }
    }
}