Estou usando o SDK do Android Maps 11.6.2 do Google Maps (também tentei 15.0.1), mas recebo a seguinte falha antes que o mapa seja exibido. A chave de API já marcada no manifesto, está disponível, mas ainda assim esse problema ocorre. Estou tendo a versão targetSDk como 28. Isso causa esse problema.
java.lang.NoClassDefFoundError: Failed resolution of: Lorg/apache/http/ProtocolVersion;
at el.b(:com.google.android.gms.dynamite_mapsdynamite@12848063@12.8.48 (100408-196123505):3)
at ek.a(:com.google.android.gms.dynamite_mapsdynamite@12848063@12.8.48 (100408-196123505):4)
at em.a(:com.google.android.gms.dynamite_mapsdynamite@12848063@12.8.48 (100408-196123505):51)
at com.google.maps.api.android.lib6.drd.ap.a(:com.google.android.gms.dynamite_mapsdynamite@12848063@12.8.48 (100408-196123505):11)
at dw.a(:com.google.android.gms.dynamite_mapsdynamite@12848063@12.8.48 (100408-196123505):16)
at dw.run(:com.google.android.gms.dynamite_mapsdynamite@12848063@12.8.48 (100408-196123505):61)
Caused by: java.lang.ClassNotFoundException: Didn't find class "org.apache.http.ProtocolVersion" on path: DexPathList[[zip file "/system/priv-app/PrebuiltGmsCorePi/app_chimera/m/MapsDynamite.apk"],nativeLibraryDirectories=[/data/user_de/0/com.google.android.gms/app_chimera/m/00000036/MapsDynamite.apk!/lib/armeabi-v7a, /data/user_de/0/com.google.android.gms/app_chimera/m/00000036/MapsDynamite.apk!/lib/armeabi, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:126)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at ad.loadClass(:com.google.android.gms.dynamite_dynamiteloader@12848063@12.8.48 (100408-196123505):25)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at el.b(:com.google.android.gms.dynamite_mapsdynamite@12848063@12.8.48 (100408-196123505):3)
at ek.a(:com.google.android.gms.dynamite_mapsdynamite@12848063@12.8.48 (100408-196123505):4)
at em.a(:com.google.android.gms.dynamite_mapsdynamite@12848063@12.8.48 (100408-196123505):51)
at com.google.maps.api.android.lib6.drd.ap.a(:com.google.android.gms.dynamite_mapsdynamite@12848063@12.8.48 (100408-196123505):11)
at dw.a(:com.google.android.gms.dynamite_mapsdynamite@12848063@12.8.48 (100408-196123505):16)
at dw.run(:com.google.android.gms.dynamite_mapsdynamite@12848063@12.8.48 (100408-196123505):61)