Android 集成 Flutter AAR

通过命令生成 aar

  flutter build aar

将 flutter_im.aar 复制到 android 项目下 app/libs

app build.grade配置

 defaultConfig {
        ndk {
            // 过滤Flutter支持的架构。
            abiFilters 'armeabi-v7a', 'arm64-v8a', 'x86_64'
        }
}


repositories {
    flatDir {
    dirs 'libs'   // aar目录
  }
}

//添加如下：
dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation(name: 'flutter_im', ext: 'aar')

    def flutterVersion = '1.0.0-ae90085a8437c0ae94d6b5ad2741739ebc742cb4'
    implementation "io.flutter:flutter_embedding_release:$flutterVersion"
    implementation "io.flutter:armeabi_v7a_release:$flutterVersion"
    implementation "io.flutter:arm64_v8a_release:$flutterVersion"
    implementation "io.flutter:x86_64_release:$flutterVersion"
}

外层build.grade配置

allprojects {
    repositories {
        google()
        jcenter()
        maven {
            url "https://storage.flutter-io.cn/download.flutter.io"
        }
    }
}

在清单文件中加入 FlutterActivity

 <activity
            android:name="io.flutter.embedding.android.FlutterActivity"
      			android:configChanges="orientation|keyboardHidden|keyboard|screenSize
                           |locale|layoutDirection|fontScale|screenLayout|density|uiMode"
            android:hardwareAccelerated="true"
            android:windowSoftInputMode="adjustResize" />

启动页面，注意导包 io.flutter.embedding.android

// 直接启动 
startActivity(FlutterActivity.createDefaultIntent(this))

使用缓存的 FlutterEngine，加快 flutter 页面的启动

// 1. Application 类中预先初始化一个 FlutterEngine
class MyApplication : Application() {
    lateinit var flutterEngine : FlutterEngine

    override fun onCreate() {
        super.onCreate()

        // 实例化FlutterEngine。
        flutterEngine = FlutterEngine(this)

        // 开始执行Dart代码,以初始化FlutterEngine。
        flutterEngine.dartExecutor.executeDartEntrypoint(
            DartExecutor.DartEntrypoint.createDefault()
        )

        // 缓存FlutterActivity要使用的FlutterEngine。
        FlutterEngineCache
            .getInstance()
            .put("hgg_im", flutterEngine)
    }
}

// 使用缓存的 FlutterEngine 启动
   startActivity(
                FlutterActivity
                    .withCachedEngine("hgg_im")
                    .build(this)
            )