我正在尝试在我的应用程序中实现体系结构组件,但是当我要使用getActivity()
将我的viewmodel中的lifecycleowner添加到我的视图中时,它的显示消息
无法解析android.support.v4.app.FragmentActivity的方法
这是我的代码:
viewModel = ViewModelProviders.of(getActivity()).get(MyViewModel.class);
viewModel.setToken(token);
viewModel.getRecent().observe(getActivity(), new Observer<List<Recent>>() {
@Override
public void onChanged(List<Recent> recent) {
adapter.setData(recent);
}
});
我的片段来自android.support.v4.app.Fragment
和MyActivity扩展AppCompatActivity
这是我的Gradle文件:
def paging_version = "2.1.0"
def lifecycle_version = "2.0.0"
def room_version = "2.1.0-alpha04"
implementation "androidx.room:room-runtime:$room_version"
annotationProcessor "androidx.room:room-compiler:$room_version"
implementation "androidx.paging:paging-runtime:$paging_version"
implementation "androidx.lifecycle:lifecycle-extensions:$lifecycle_version"
implementation "androidx.lifecycle:lifecycle-common-java8:$lifecycle_version"
我该如何解决这个问题?提前致谢。
问题
在androidx.lifecycle.ViewModelProviders.of(FragmentActivity)
,他们接受androidx.fragment.app.FragmentActivity
,而不是android.support.v4.app.FragmentActivity
。
解
Migrate to AndroidX
将整个项目迁移到AndroidX。您可以在this page找到信息dependencies {
def lifecycle_version = "1.1.1"
// ViewModel and LiveData
implementation "android.arch.lifecycle:extensions:$lifecycle_version"
// alternatively - just ViewModel
implementation "android.arch.lifecycle:viewmodel:$lifecycle_version" // For Kotlin use viewmodel-ktx
// alternatively - just LiveData
implementation "android.arch.lifecycle:livedata:$lifecycle_version"
// alternatively - Lifecycles only (no ViewModel or LiveData).
// Support library depends on this lightweight import
implementation "android.arch.lifecycle:runtime:$lifecycle_version"
annotationProcessor "android.arch.lifecycle:compiler:$lifecycle_version" // For Kotlin use kapt instead of annotationProcessor
// alternately - if using Java8, use the following instead of compiler
implementation "android.arch.lifecycle:common-java8:$lifecycle_version"
// optional - ReactiveStreams support for LiveData
implementation "android.arch.lifecycle:reactivestreams:$lifecycle_version"
// optional - Test helpers for LiveData
testImplementation "android.arch.core:core-testing:$lifecycle_version"
}