为什么在尝试实现 ViewModel 时出现此错误？

Question

I am trying to learn about ViewModels so i am following the instructions from the Android Developer docs, but unfortunately I am receiving this message i attached a screenshot.我正在尝试了解 ViewModels，所以我按照 Android 开发人员文档中的说明进行操作，但不幸的是，我收到了这条消息，我附上了截图。 All I have really done so far was added necessary implementations stated on the website and followed what was stated on the doc to implement it.到目前为止，我所做的只是添加了网站上说明的必要实现，并按照文档中的说明来实现它。

  def lifecycle_version = "2.6.0-alpha02"
    def arch_version = "2.1.0"

    // ViewModel
    implementation "androidx.lifecycle:lifecycle-viewmodel:$lifecycle_version"
    // LiveData
    implementation "androidx.lifecycle:lifecycle-livedata:$lifecycle_version"
    // Lifecycles only (without ViewModel or LiveData)
    implementation "androidx.lifecycle:lifecycle-runtime:$lifecycle_version"

    // Saved state module for ViewModel
    implementation "androidx.lifecycle:lifecycle-viewmodel-savedstate:$lifecycle_version"

    //Was not recognizing ViewModelProvider so i added this to fix it..
    implementation "android.arch.lifecycle:extensions:1.1.1"
    implementation "android.arch.lifecycle:viewmodel:1.1.1"

Answer 1

Add second parameter ViewModelFactory in ViewModelProvider在 ViewModelProvider 中添加第二个参数 ViewModelFactory

val factory = YourViewModelFactory(YourRepository())     
viewModel = ViewModelProvider(this, factory).get(yourViewModelclass::class.java)

为什么在尝试实现 ViewModel 时出现此错误？

问题描述

1 个解决方案

解决方案1
0 2022-09-14 05:30:16

为什么在尝试实现 ViewModel 时出现此错误？

问题描述

1 个解决方案

解决方案1 0 2022-09-14 05:30:16

解决方案1
0 2022-09-14 05:30:16