我正在开发Android MVVM应用程序.我只是手动切换到androidx库.这是我的build.gradle中的库：
implementation 'com.google.code.gson:gson:2.8.5'
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.appcompat:appcompat:1.0.0-rc02'
implementation 'androidx.constraintlayout:constraintlayout:1.1.0'
implementation 'androidx.legacy:legacy-support-v4:1.0.0-rc02'
implementation 'com.google.android.material:material:1.0.0-rc01'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test:runner:1.1.0-alpha4'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0-alpha4'
implementation 'com.airbnb.android:lottie:2.5.5'
implementation 'androidx.recyclerview:recyclerview:1.0.0-rc02'
implementation 'androidx.lifecycle:lifecycle-extensions:2.0.0-rc01'
implementation 'androidx.lifecycle:lifecycle-viewmodel:2.0.0-rc01'
implementation 'androidx.lifecycle:lifecycle-livedata:2.0.0-rc01'
implementation 'androidx.lifecycle:lifecycle-runtime:2.0.0-rc01'
implementation "androidx.lifecycle:lifecycle-common-java8:2.0.0-rc01"
implementation "androidx.lifecycle:lifecycle-reactivestreams:2.0.0-rc01"
testImplementation "androidx.arch.core:core-testing:2.0.0-rc01"
implementation "androidx.room:room-runtime:2.0.0-rc01"
annotationProcessor "androidx.room:room-compiler:2.0.0-rc01"
implementation "androidx.room:room-rxjava2:2.0.0-rc01"
implementation 'com.github.bumptech.glide:glide:4.8.0'
annotationProcessor 'com.github.bumptech.glide:compiler:4.8.0'
我更改了代码和布局文件中的所有内容,所有导入等.
Gradle可以成功构建.
在我的MainActivity中,我有以下代码：
viewModel = ViewModelProviders.of(this).get(MainViewModel.class);
binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
binding.setVariable(BR.viewModel, viewModel);
binding.setLifecycleOwner(this);
这是我的MainActivity中唯一不会显示它的androidx版本的包：
import android.databinding.DataBindingUtil;
每个其他包都显示了自己的androidx版本.当我删除导入我只能选择Android版本而不是androidx.
我收到错误：binding.setLifecycleOwner(this);
那是因为DatabindingUtil仍然引用android.databinding包而不是androidx.databinding包.我的Android Studio告诉我传递给方法setLifecycleOwner的参数必须是：anndroid.arch.lifecycle.LifecycleOwner.
我不知道为什么我不能导入androidx.databinding.DatabindingUtil包.有谁知道如何解决这个问题？
我确实尝试重建和无效缓存&重新开始.
解决方法:
>确保您使用的是Android Studio 3.2 RC 2
>在gradle.properties文件中添加以下2行
android.useAndroidX =真
android.enableJetifier =真