ArkTs支持类似java的匿名内部类实现接口

// 原先 
class A { 
  foo() { 
    let a = new class { 
      v: number = 123 
    }(); 
  } 
} 
 
// 现在 
class A { 
  foo() { 
    class B { 
      v: number = 123 
    } 
    let b = new B(); 
  } 
}

onSucces:(t: T)=> void 
onFailed:(code: string, reason: string)=>void 
} 
 
let obj: IVoiceRecordListener<string> = { 
  onSucces:()=>{}, 
  onFailed:()=>{} 
}