Manifest merger failed : Attribute application@appComponentFactory value=(android.support.v4.app.CoreComponentFactory) from [com.android.support:support-compat:28.0.0-alpha3] AndroidManifest.xml:22:18-91
is also present at [androidx.core:core:1.0.0-alpha3] AndroidManifest.xml:22:18-86 value=(androidx.core.app.CoreComponentFactory).
Suggestion: add 'tools:replace="android:appComponentFactory"' to <application> element at AndroidManifest.xml:5:5-19:19 to override.
Caused by: java.lang.ArrayIndexOutOfBoundsException: 1
at com.google.android.gms.dependencies.DependencyInspector.registerDependencies(DependencyInspector.java:118)
at com.google.android.gms.dependencies.DependencyInspector.afterResolve(DependencyInspector.java:173)
classpath 'com.google.gms:google-services:4.2.0'//add for firebase
downgrade版本号到4.0.2