unity打包安卓apk 奇葩错误总结

1. 1.CommandInvokationFailure: Unable to convert classes into dex format. C:/Program Files (x86)/Java/jdk1.8.0_73\bin\java.exe -Xmx10 -Dcom.android.sdkmanager.toolsdir="D:/android-sdk-windows244\tools" -Dfile.encoding=UTF8 -jar "D:\Unity\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\sdktools.jar" - 
   
   一般此类错误发生的原因有三种：（1）bin文件夹和libs文件夹中添加了不该添加的jar包； （2）jdk版本问题  是否需要安装最新的jdk来解决
2. ArgumentException: The Assembly System.Configuration is referenced by System.Data ('Assets/Plugins/Android/System.Data.dll'). But the dll is not allowed to be included or could not be found.
   
   点击Player Settings按钮，找到Api Compatibility Level选项，选择”.Net 2.0”，而非”.Net 2.0 Subset”
3. apk包打开后提示 找不到unity的activity 
   解决办法：可能是当前版本的picosdk unity版本不支持  更新 pico版本   此类问题一般出现在 介入picosdk版本太低所致。
4. Caused by: java.lang.NoSuchMethodError: No direct method (Landroid/content/ContextWrapper;)V in class Lcom/unity3d/player/UnityPlayer; or its super classes (declaration of 'com.unity3d.player.UnityPlayer' appears in /data/app/com.growlib.tread-1/base.apk)
   打包后 执行apk遇到崩溃的情况  卸载重新安装   或者 jar有问题

5. ArgumentException: The Assembly System.Configuration is referenced by System.Data ('Assets/Plugins/Android/System.Data.dll'). But the dll is not allowed to be included or could not be found.
   In Build Settings > Player Settings > API Compatibility Level, change the .NET setting.Then try to build again and see if the error goes away or changes.

6. unity打包安卓apk  代码中使用HHTP请求时，有时候会抛出异常
   System.TypeInitializationException: An exception was thrown by the type initializer for System.Net.WebRequest ---> System.Configuration.ConfigurationErrorsException: Error Initializing the configuration system. ---> System.MissingMethodException: Method not found: 'Default constructor not found...ctor() of System.Configuration.ExeConfigurationHost'.
   此问题的解决办法是，此选项选成disabled  或者 link.XML手动排除不能被剥离的部分（剥离写法百度）

   
   StrippingLevel是用来减少打包出来的player的体积