ios刚上线，这边着手改成android版本，我开始使用的是unity2017.4.1版本
上传谷歌商店是出现这两个警告：
要支持64位，但是在2017版本上没有找到64位的打包选项，猜测应该是版本的问题，上网查询果然是
以下是我查询的：
https://www.cnblogs.com/cnxkey/articles/9760391.html
怎样打包64位和Androi APP Bundle上面他们讲解的都很详细，而且还讲解了为什么google要支持64位，非常感谢他们分享。
一：我下载了新的unity2018.4.1，开始先键一个demo，里面就随便建了个ui，然后开始打包
1:在PlaySettings->other settings->Scriptiing Backend 选择IL2CPP（默认是Mono）,
c++ Compiler Configuration 选择Release
Target Architectures 里面的Arm64就是可以说勾选的了，勾选打包即可
2:Androi APP Bundley优化在Build Sttings 勾选Build App Bundle（Google Play）即可，打出的是aab包
打包运行成功。
注：要死测试的话就用Mono打包吧，毕竟IL2CPP打包要慢上几倍
二：2017.4.1转成2018.4.1时产生的部分bug
1:google admob 产生广告bug
在2017.4.1广告是没问题的，移植到2018版本出现此问题
E/Unity: AndroidJavaException: java.lang.ClassNotFoundException: com.google.android.gms.ads.AdRequest$Builder
java.lang.ClassNotFoundException: com.google.android.gms.ads.AdRequest$Builder
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:308)
at java.lang.Class.forName(Class.java:272)
at com.unity3d.player.UnityPlayer.nativeRender(Native Method)
at com.unity3d.player.UnityPlayer.c(Unknown Source)
at com.unity3d.player.UnityPlayer$e$2.queueIdle(Unknown Source)
at android.os.MessageQueue.next(MessageQueue.java:211)
at android.os.Looper.loop(Looper.java:122)
at com.unity3d.player.UnityPlayer$e.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: Didn\'t find class "com.google.android.gms.ads.AdRequest$Builder" on path: DexPathList[[zip file "/data/app/com.newqwx.crushminer-1/base.apk"],nativeLibraryDirectories=[/data/app/com.newqwx.crushminer-1/lib/arm, /vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.la
beginning of crash
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.newqwx.crushminer, PID: 13331
java.lang.Error: FATAL EXCEPTION [main]
Unity version
: 2018.4.1f1
Device model
: motorola Nexus 6
Device fingerprint: google/shamu/shamu:5.0/LRX21O/1570415:user/release-keys
Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/ads/MobileAds;
at com.google.unity.ads.RewardBasedVideo$1.run(RewardBasedVideo.java:65)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.ClassNotFoundException: Didn\'t find class "com.google.android.gms.ads.MobileAds" on path: DexPathList[[zip file "/data/app/com.newqwx.crushminer-1/base.apk"],nativeLibraryDirectories=[/data/app/com.newqwx.crushminer-1/lib/arm, /vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
at com.google.unity.ads.RewardBasedVideo$1.run(RewardBasedVideo.java:65)?
at android.os.Handler.handleCallback(Handler.java:739)?
at android.os.Handler.dispatchMessage(Handler.java:95)?
at android.os.Looper.loop(Looper.java:135)?
at android.app.ActivityThread.main(ActivityThread.java:5221)?
at java.lang.reflect.Method.invoke(Native Method)?
at java.lang.reflect.Method.invoke(Method.java:372)?
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)?
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)?
Suppressed: java.lang.ClassNotFoundException: com.google.android.gms.ads.MobileAds
at java.lang.Class.classForName(Native Method)
at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
... 10 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available
解决方法：Assets->Play services Resolver ->Android Resolver->Resolve 解决
但由此可能产生下面打包的bug
2：产生的打包的Gradle错误