我想了解 Android 中的 ViewModel 和 LiveData 概念。我正在做一个练习项目,但是当我在我的应用程序级 gradle 文件中添加 implementation 'androidx.lifecycle:lifecycle-extensions-ktx:2.0.0-alpha1' 行时,它...
){super.onCreate(savedInstanceState)setContentView(R.layout.activity_main)// 创建一个 LifecycleRegistry 实例lifecycleRegistry=LifecycleRegistry(this)// 将生命周期事件与 MainActivity 关联起来lifecycle.addObserver(MyObserver())}overridefungetLifecycle():...
androidx.lifecycle:lifecycle-common-java8:2.0.0-rc01 androidx.lifecycle:lifecycle-compiler:2.0.0-rc01 androidx.lifecycle:lifecycle-extensions:2.0.0-rc01 androidx.lifecycle:lifecycle-livedata:2.0.0-rc01 androidx.lifecycle:lifecycle-livedata-core:2.0.0-rc01 androidx.lifecycle:lifecycle-reactivestreams:...
android.arch.lifecycle:common-java8androidx.lifecycle:lifecycle-common-java8:2.0.0-rc01 android.arch.lifecycle:compilerandroidx.lifecycle:lifecycle-compiler:2.0.0-rc01 android.arch.lifecycle:extensionsandroidx.lifecycle:lifecycle-extensions:2.0.0-rc01 android.arch.lifecycle:livedataandroidx.lifecycle:lifecy...
Activity会继承自FragmentActivity,并在ComponentActivity中可以看到实现了LifeCycleOwner接口 public class FragmentActivity extends ComponentActivity implements ViewModelStoreOwner, ActivityCompat.OnRequestPermissionsResultCallback, ActivityCompat.RequestPermissionsRequestCodeValidator { ...
androidx.lifecycle:lifecycle-extensions:提供ViewModel和LiveData等生命周期感知组件。 androidx.room:room-runtime:提供Room数据库访问库,简化数据库操作。 androidx.constraintlayout:constraintlayout:提供ConstraintLayout,用于更灵活地布局界面。 如何在项目中添加AndroidX依赖 要在Android项目中添加AndroidX依赖,你需要在项目...
unspecified' --> 'androidx.lifecycle:lifecycle-extensions:2.1.0-alpha03' --> 'androidx.arch.core:core-runtime:2.0.1-alpha01' Dependency path 'shopperapp:data:unspecified' --> 'androidx.room:room-rxjava2:2.0.0-rc01' --> 'androidx.arch.core:core-runtime:2.0.0-rc01' Dependency path...
android.arch.lifecycle:common-java8 androidx.lifecycle:lifecycle-common-java8:2.0.0-alpha1 android.arch.lifecycle:common androidx.lifecycle:lifecycle-common:2.0.0-alpha1 android.arch.lifecycle:compiler androidx.lifecycle:lifecycle-compiler:2.0.0-alpha1 android.arch.lifecycle:extensions androidx.lifecycle...
implementation "androidx.lifecycle:lifecycle-extensions:$lifecycle_version" } 8 changes: 3 additions & 5 deletions 8 app/src/main/java/com/lxj/androidktxdemo/MainActivity.kt Original file line numberDiff line numberDiff line change @@ -1,17 +1,15 @@ package com.lxj.androidktxdemo import ...
28.0.0' // Lifecycle components implementation "androidx.lifecycle:lifecycle-extensions:2.1.0-alpha04" annotationProcessor "androidx.lifecycle:lifecycle-compiler:2.1.0-alpha04" // Room Components implementation "androidx.room:room-runtime:2.1.0-alpha06" annotationProcessor "androidx.room:room-compiler...