android - Android Flutter 使用缓存引擎启动自定义活动

Question

我正在集成FlutterActivity到原生 Android 应用程序。我有CustomFlutterActivitywhich 继承自FlutterActivity，我想使用 cached 启动它FlutterEngine。

这是文档中有关如何执行此操作的代码：

startActivity(
      FlutterActivity
        .withNewEngine()
        .build(currentActivity)
      );

我想要实现的是用我的缓存引擎启动我的（而不是文档所说CustomFlutterActivity的通用）FlutterActivity

Answer 1

在您的CustomFlutterActivity其中，我认为FlutterActivity您可以覆盖getCachedEngineId并提供my_engine_id您之前根据文档缓存的内容，即：

FlutterEngineCache
      .getInstance()
      .put("my_engine_id", flutterEngine);

因此：

class CustomFlutterActivity: FlutterActivity() {
    override fun getCachedEngineId(): String? {
        return "my_engine_id"
    }
}

查看文档

Answer 2

您可以覆盖provideFlutterEngine并FlutterEngine从缓存中返回。

class CustomFlutterActivity : FlutterActivity() {
    override fun provideFlutterEngine(context: Context): FlutterEngine? {
        return FlutterEngineCache.getInstance().get("flutter_engine")
    }
}