引入依赖

def lifecycle_version ="2.2.0"
implementation "androidx.lifecycle:lifecycle-viewmodel:$lifecycle_version"

创建实体类继承ViewModel

class KlineViewModel: ViewModel() {
    var name:String?
    var age:Int?
    }

实例化viewModel

val klineViewModel by lazy { ViewModelProviders.of(this).get(KlineViewModel::class.java) }

操作ViewModel的数据

klineViewModel.name