编写有关LiveData的教程(&a);视图模型。
内置。gradle I补充道:
// ViewModel and LiveData
implementation "androidx.lifecycle:lifecycle-extensions:2.0.0"
项目已同步,没有问题。然后我添加了(1):
annotationProcessor "androidx.lifecycle:lifecycle-compiler:2.0.0"
但是同步失败,所以我添加了(2)(我安装了Java 10.0.2):
// alternately - if using Java8, use the following instead of lifecycle-compiler
implementation "androidx.lifecycle:lifecycle-common-java8:2.0.0"
但我得到了相同的清单合并失败错误:
Manifest merger failed : Attribute application@appComponentFactory value=(android.support.v4.app.CoreComponentFactory) from [com.android.support:support-compat:28.0.0] AndroidManifest.xml:22:18-91
is also present at [androidx.core:core:1.0.0] AndroidManifest.xml:22:18-86 value=(androidx.core.app.CoreComponentFactory).
Suggestion: add 'tools:replace="android:appComponentFactory"' to <application> element at AndroidManifest.xml:6:5-28:19 to override.
添加到Android清单:
<application
android:allowBackup="false"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme"
tools:ignore="GoogleAppIndexingWarning"
tools:replace="android:appComponentFactory">
同步失败:
Java语言lang.RuntimeException:清单合并失败,出现多个
错误,请参阅日志