React-native android 项目有很多错误：找不到类'android.XXX'

Question

我有一个 react-native 项目，它应该支持 16 的最低 SDK 版本并且是 androidX，但我使用 android studio logcat 得到这些错误：

 E/dalvikvm: Could not find class 'android.os.UserManager', referenced from method androidx.core.os.UserManagerCompat.isUserUnlocked
 12-21 16:19:25.003 12695-12695/? E/dalvikvm: Could not find class 'android.app.AppOpsManager', referenced from method com.google.android.gms.common.wrappers.PackageManagerWrapper.zzb
 12-21 16:19:25.153 12695-12719/? E/dalvikvm: Could not find class 'android.app.AppOpsManager', referenced from method androidx.core.app.AppOpsManagerCompat.noteOp
 12-21 16:19:25.153 12695-12719/? E/dalvikvm: Could not find class 'android.app.AppOpsManager', referenced from method androidx.core.app.AppOpsManagerCompat.noteOpNoThrow
 12-21 16:19:25.153 12695-12719/? E/dalvikvm: Could not find class 'android.app.AppOpsManager', referenced from method androidx.core.app.AppOpsManagerCompat.noteProxyOp
 12-21 16:19:25.153 12695-12719/? E/dalvikvm: Could not find class 'android.app.AppOpsManager', referenced from method androidx.core.app.AppOpsManagerCompat.noteProxyOpNoThrow
 12-21 16:19:25.213 12695-12695/? E/dalvikvm: Could not find class 'com.crashlytics.android.ndk.CrashlyticsNdk', referenced from method com.crashlytics.android.CrashlyticsInitProvider.createCrashlyticsKits
 12-21 16:19:25.464 12695-12735/com.myProject.demo E/dalvikvm: Could not find class 'android.os.UserManager', referenced from method com.google.android.gms.common.GooglePlayServicesUtilLight.isRestrictedUserProfile
 12-21 16:19:25.884 12695-12735/com.myProject.demo E/Fabric: Settings request failed.
 12-21 16:19:25.894 12695-12736/com.myProject.demo E/Answers: Failed to retrieve settings

我搜索了很多，我发现唯一相关的是this，这并没有解决我的问题。

我不知道这是否有帮助，这些是我的 app/build.gradle 中的依赖项。也许其中之一或与 API 版本 16 不兼容

// Firebase dependencies
implementation "com.google.android.gms:play-services-base:17.1.0"
implementation 'com.google.firebase:firebase-analytics:17.2.1'
implementation "com.google.firebase:firebase-core:17.2.1"
implementation "com.google.firebase:firebase-config:19.0.4"
implementation 'com.google.firebase:firebase-perf:19.0.3'
implementation "com.google.firebase:firebase-messaging:20.1.0"
implementation 'com.crashlytics.sdk.android:crashlytics:2.10.1'

// Android X
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.coordinatorlayout:coordinatorlayout:1.1.0'
implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0-alpha03'
implementation 'androidx.multidex:multidex:2.0.1'

Answer 1

在SDK 17版本中添加了UserManager，所以找不到。详情请见link。

如果你想使用它，你必须在android原生添加支持库。 com.android.support:support-compat:28.0.0-alpha1 有。

如果你已经添加了 androidX 库，你应该将类更改为UserManagerCompat。详情可以进入这个link 它位于androidX.core。在android/app/build.gradle添加以下内容

def core_role_version = "1.0.0-alpha01"
implementation "androidx.core:core-role:$core_role_version"