好吧，自从我上次成功构建以来，我所做的就是尝试将 Google Play 服务添加到我的游戏中，从这里。
我导入了unity包，并在相关的设置窗口中设置了android版的google play游戏。
我此时尝试构建，但是我无法构建，在构建 dex 文件时收到奇怪的错误，表明 aar 文件之间存在冲突。我将其范围缩小为由 asset/plugins/android/play-services-base-9.0.2 和 asset/plugins/android/play-services-basement-9.0.2 引起的。
我取消选中这两个构建到 android 的选项，以消除 dex 错误内容的转换。我以为这样就可以了。
然后我将应用程序推送到 Google Play（alpha 环境）以及一个供 Google Play 在 start() 上登录的小控制器脚本：
void Awake()
{
// recommended for debugging:
PlayGamesPlatform.DebugLogEnabled = true;
// Activate the Google Play Games platform
PlayGamesPlatform.Activate();
}
void Start()
{
Login();
}
void Login()
{
Social.localUser.Authenticate((bool success) => {
LoggedIn = success;
});
}
然而，在打开第一个场景之前，Unity 似乎崩溃了。启动后立即崩溃。 logcat 的内容可以在here 看到。
问题似乎发生在第 842 行附近：
10-07 06:03:06.282: E/AndroidRuntime(9551): FATAL EXCEPTION: main
10-07 06:03:06.298: W/ActivityManager(771): Force finishing activity 1 com.PINGUAPPS.TEMPLATE/com.unity3d.player.UnityPlayerNativeActivity
10-07 06:03:06.339: W/ActivityManager(771): Force finishing activity 2 com.google.android.apps.mtaas.backdrop/.BackdropActivity
10-07 06:03:06.402: D/Atlas(771): Validating map...
我不知道如何解决这个问题？
::附加信息::
所以我已经回滚到将 Unity 包导入到 Unity 中的位置，但我还没有配置它，给它包含资源的 xml。此时，它在编辑器中给出了 nullreferenceException：
NullReferenceException: Object reference not set to an instance of an object
GooglePlayServices.PlayServicesResolver.OnPostprocessAllAssets (System.String[] importedAssets, System.String[] deletedAssets, System.String[] movedAssets, System.String[] movedFromAssetPaths) (at Assets/PlayServicesResolver/Editor/PlayServicesResolver.cs:104)
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:232)
System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MethodBase.cs:115)
UnityEditor.AssetPostprocessingInternal.PostprocessAllAssets (System.String[] importedAssets, System.String[] addedAssets, System.String[] deletedAssets, System.String[] movedAssets, System.String[] movedFromPathAssets) (at C:/buildslave/unity/build/Editor/Mono/AssetPostprocessor.cs:27)
UnityEditor.AssetDatabase:Refresh()
GooglePlayGames.Editor.GPGSUpgrader:.cctor() (at Assets/GooglePlayGames/Editor/GPGSUpgrader.cs:107)
UnityEditor.EditorAssemblies:SetLoadedEditorAssemblies(Assembly[])
它引用的行是：
if (!Resolver.ShouldAutoResolve(importedAssets, deletedAssets,
movedAssets, movedFromAssetPaths))
然而，在这个 nullreferenceException 之后，我看到解析器正在日志中注册。如：
Registering resolver version 1.2.0
UnityEngine.Debug:Log(Object)
GooglePlayServices.ResolverVer1_2:.cctor() (at Assets/PlayServicesResolver/Editor/ResolverVer1_2.cs:34)
UnityEditor.EditorAssemblies:SetLoadedEditorAssemblies(Assembly[])
等等
现在，我可以构建这个 APK 并在我的手机上运行它，没有任何问题。 （显然 google play 游戏服务不会做太多事情，因为它没有配置）。
因此，我转到“窗口”>>“Google Play 游戏”>>“设置”>>“Android” 在这里，我粘贴了我的资源 XML。 我为资源 C# 文件指定位置和名称，然后单击“设置”。
我看到以下 Jar 依赖冲突选项：
Remove or replace play-services-ads version 9.0.2 with version 9.6.1?
Remove or replace support-v4 version 23.1.1 with version 24.0.0?
Remove or replace play-services-gcm version 9.0.2 with version 9.6.1?
Remove or replace play-services-location version 9.0.2 with version 9.6.1?
Remove or replace play-services-base version 9.0.2 with version 9.6.1?
Remove or replace play-services-basement version 9.0.2 with version 9.6.1?
Remove or replace support-annotations version 23.1.1 with version 23.4.0?
Remove or replace play-services-iid version 9.0.2 with version 9.6.1?
Remove or replace play-services-tasks version 9.0.2 with version 9.6.1?
我已经尝试对所有这些按“保留”以及“确定”，这两种操作最终都会导致与我的 aar 发生冲突。
我只是再次尝试，这次对所有这些都按“确定”，并尝试再次构建，因为自从我上次成功构建以来只完成了此操作。将 jar 转换为 dex 格式时，构建失败并出现以下错误：
CommandInvokationFailure: Unable to convert classes into dex format.
C:\Program Files (x86)\Java\jdk1.7.0_55\bin\java.exe -Xmx1024M -Dcom.android.sdkmanager.toolsdir="C:/Users/PINGU/AppData/Local/Android/sdk\tools" -Dfile.encoding=UTF8 -jar "C:\Program Files\Unity\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\sdktools.jar" -
stderr[
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.a) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.banners.BannerSize$1) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.banners.b) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.banners.d) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.banners.a) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.banners.c) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.interstitials.a.b) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.interstitials.a.c) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.ofw.a) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.a) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.a.e) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.a.f) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.a.g) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.a.h) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.a.d) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.a.i) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.a.j) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.a.m) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.a.n) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.a.o) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.b) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.c) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.e) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.h) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.f) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.g) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.k) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.i) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.j) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.fyber.ads.videos.l) that doesn't come with<message truncated>
如前所述，我可以通过找到我的 play-services-base 和 play-services-basement 文件并取消选中它们来为 Android 构建来防止这种情况发生。当我这样做时，APK 会构建，但是应用程序一打开就会崩溃。
去年我在 Android 游戏项目中遇到了同样的问题。我更新了 Android Support Repository 、Android Support Library 、Google Play Services、Google Repository 、Google Billing Library、Android API 6.0 ，然后问题就解决了。我仍然不知道问题的根源是什么，但是，我在我的项目中用这种方式解决了问题。我希望它也适合你。
不久前我的 Unity 项目也遇到了同样的问题。是一个重复的 support-v4 类。发现最好将 google play 插件导入到一个空项目中（进行测试构建）。
然后完全删除 google play 插件以及 Extensions、Editor 和 Plugins 文件夹中的所有文件，并从空项目中重新导入。抱歉，我无法进一步澄清是否可以再访问我的项目文件。
万一，如果你没有在检查器中添加Google Admob ADs ID，大多数情况下也会导致应用程序崩溃。