Android - 'SQLite.SQLiteConnection' 的类型初始值设定项抛出异常。 ---> System.DllNotFoundException: e_sqlite3
Android - The type initializer for 'SQLite.SQLiteConnection' threw an exception. ---> System.DllNotFoundException: e_sqlite3
在我们的 Xamarin Android 项目中，我们正在尝试从 sqlite-net 切换到官方 sqlite-net-pcl 包。
然而，在创建新的 SQLiteConnection 时进行此切换后，出现以下异常：
The type initializer for 'SQLite.SQLiteConnection' threw an exception.
---> System.DllNotFoundException: e_sqlite3
完全异常：
Xamarin caused by: android.runtime.JavaProxyThrowable:
System.TypeInitializationException: The type initializer for
'SQLite.SQLiteConnection' threw an exception. --->
System.DllNotFoundException: e_sqlite3 at (wrapper
managed-to-native)
SQLitePCL.SQLite3Provider_e_sqlite3+NativeMethods:sqlite3_libversion_number
() at
SQLitePCL.SQLite3Provider_e_sqlite3.SQLitePCL.ISQLite3Provider.sqlite3_libversion_number
() [0x00000] in :0 at
SQLitePCL.raw.SetProvider (SQLitePCL.ISQLite3Provider imp) [0x00000]
in <4472a4c16754425197d915f39ebd937e>:0 at
SQLitePCL.Batteries_V2.Init () [0x0000d] in
<1125db7e18f0475797b2764ec6653cf1>:0 at
SQLite.SQLiteConnection..cctor () [0x00000] in
/Users/fak/Dropbox/Projects/sqlite-net/src/SQLite.cs:171 --- End
of inner exception stack trace --- at
mono.android.view.View_OnClickListenerImplementor.n_onClick(Native
Method) at
mono.android.view.View_OnClickListenerImplementor.onClick(View_OnClickListenerImplementor.java:30)
at android.view.View.performClick(View.java:4780) at
android.view.View$PerformClick.run(View.java:19866) at
android.os.Handler.handleCallback(Handler.java:739) at
android.os.Handler.dispatchMessage(Handler.java:95) at
android.os.Looper.loop(Looper.java:135) at
android.app.ActivityThread.main(ActivityThread.java:5254) at
java.lang.reflect.Method.invoke(Native Method) at
java.lang.reflect.Method.invoke(Method.java:372) at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
在日志中我可以看到以下信息：
12-01 10:43:05.356 D/Mono (11194): DllImport attempting to load:
'e_sqlite3'. 12-01 10:43:05.358 D/Mono (11194): DllImport error
loading library
'/storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3':
'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86//storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3"
not found'. 12-01 10:43:05.360 D/Mono (11194): DllImport error
loading library
'/storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3.so':
'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86//storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3.so"
not found'. 12-01 10:43:05.360 D/Mono (11194): DllImport error
loading library '/system/lib/libe_sqlite3': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86//system/lib/libe_sqlite3" not
found'. 12-01 10:43:05.360 D/Mono (11194): DllImport error loading
library '/system/lib/libe_sqlite3.so': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86//system/lib/libe_sqlite3.so"
not found'. 12-01 10:43:05.360 D/Mono (11194): DllImport error
loading library 'libe_sqlite3': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86/libe_sqlite3" not found'.
12-01 10:43:05.361 D/Mono (11194): DllImport error loading library
'libe_sqlite3.so': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86/libe_sqlite3.so" not found'.
12-01 10:43:05.361 D/Mono (11194): DllImport error loading library
'e_sqlite3': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86/e_sqlite3" not found'. 12-01
10:43:05.362 D/Mono (11194): DllImport error loading library
'/storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3':
'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86//storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3"
not found'. 12-01 10:43:05.364 D/Mono (11194): DllImport error
loading library
'/storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3.so':
'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86//storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3.so"
not found'. 12-01 10:43:05.364 D/Mono (11194): DllImport error
loading library '/system/lib/libe_sqlite3': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86//system/lib/libe_sqlite3" not
found'. 12-01 10:43:05.364 D/Mono (11194): DllImport error loading
library '/system/lib/libe_sqlite3.so': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86//system/lib/libe_sqlite3.so"
not found'. 12-01 10:43:05.364 D/Mono (11194): DllImport error
loading library 'libe_sqlite3': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86/libe_sqlite3" not found'.
12-01 10:43:05.364 D/Mono (11194): DllImport error loading library
'libe_sqlite3.so': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86/libe_sqlite3.so" not found'.
12-01 10:43:05.365 D/Mono (11194): DllImport error loading library
'libe_sqlite3': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86/libe_sqlite3" not found'.
12-01 10:43:05.365 W/Mono (11194): DllImport unable to load library
'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86/libe_sqlite3" not found'.
12-01 10:43:05.365 D/Mono (11194): DllImport attempting to load:
'e_sqlite3'. 12-01 10:43:05.366 D/Mono (11194): DllImport error
loading library
'/storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3':
'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86//storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3"
not found'. 12-01 10:43:05.368 D/Mono (11194): DllImport error
loading library
'/storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3.so':
'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86//storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3.so"
not found'. 12-01 10:43:05.368 D/Mono (11194): DllImport error
loading library '/system/lib/libe_sqlite3': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86//system/lib/libe_sqlite3" not
found'. 12-01 10:43:05.368 D/Mono (11194): DllImport error loading
library '/system/lib/libe_sqlite3.so': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86//system/lib/libe_sqlite3.so"
not found'. 12-01 10:43:05.368 D/Mono (11194): DllImport error
loading library 'libe_sqlite3': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86/libe_sqlite3" not found'.
12-01 10:43:05.368 D/Mono (11194): DllImport error loading library
'libe_sqlite3.so': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86/libe_sqlite3.so" not found'.
12-01 10:43:05.369 D/Mono (11194): DllImport error loading library
'e_sqlite3': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86/e_sqlite3" not found'. 12-01
10:43:05.370 D/Mono (11194): DllImport error loading library
'/storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3':
'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86//storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3"
not found'. 12-01 10:43:05.371 D/Mono (11194): DllImport error
loading library
'/storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3.so':
'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86//storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3.so"
not found'. 12-01 10:43:05.372 D/Mono (11194): DllImport error
loading library '/system/lib/libe_sqlite3': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86//system/lib/libe_sqlite3" not
found'. 12-01 10:43:05.372 D/Mono (11194): DllImport error loading
library '/system/lib/libe_sqlite3.so': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86//system/lib/libe_sqlite3.so"
not found'. 12-01 10:43:05.372 D/Mono (11194): DllImport error
loading library 'libe_sqlite3': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86/libe_sqlite3" not found'.
12-01 10:43:05.372 D/Mono (11194): DllImport error loading library
'libe_sqlite3.so': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86/libe_sqlite3.so" not found'.
12-01 10:43:05.373 D/Mono (11194): DllImport error loading library
'libe_sqlite3': 'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86/libe_sqlite3" not found'.
12-01 10:43:05.373 W/Mono (11194): DllImport unable to load library
'dlopen failed: library
"/data/app/com.psonar.android-1/lib/x86/libe_sqlite3" not found'.
很明显出了什么问题：System.DllNotFoundException: e_sqlite3 但是我找不到任何可以解决这个问题的相关信息。
我检查了我的 nuget 包，它们似乎都已正确安装。
我检查了包裹位置，都是正确的。非常不确定原因可能在哪里。
编辑：
在这里向包的作者报告：
https://github.com/praeclarum/sqlite-net/issues/478
nuget 包也必须安装在我们的主要 droid 应用程序项目中。如果它安装在不是应用程序启动项目的解决方案项目中，则会产生这些问题。
我知道那是旧的 post，很抱歉简历，
要回答无法解决问题的@sagar-panwala，最简单的方法是解决该问题而不会对 nu-get 插件发疯，在为 android 编译时将 .droid 项目设置为 "StartupProject"：
可能是原来的nuget包有错误。
在我们的 Xamarin Android 项目中，我们正在尝试从 sqlite-net 切换到官方 sqlite-net-pcl 包。
然而，在创建新的 SQLiteConnection 时进行此切换后，出现以下异常：
The type initializer for 'SQLite.SQLiteConnection' threw an exception. ---> System.DllNotFoundException: e_sqlite3
完全异常：
Xamarin caused by: android.runtime.JavaProxyThrowable: System.TypeInitializationException: The type initializer for 'SQLite.SQLiteConnection' threw an exception. ---> System.DllNotFoundException: e_sqlite3 at (wrapper managed-to-native) SQLitePCL.SQLite3Provider_e_sqlite3+NativeMethods:sqlite3_libversion_number () at SQLitePCL.SQLite3Provider_e_sqlite3.SQLitePCL.ISQLite3Provider.sqlite3_libversion_number () [0x00000] in :0 at SQLitePCL.raw.SetProvider (SQLitePCL.ISQLite3Provider imp) [0x00000] in <4472a4c16754425197d915f39ebd937e>:0 at SQLitePCL.Batteries_V2.Init () [0x0000d] in <1125db7e18f0475797b2764ec6653cf1>:0 at SQLite.SQLiteConnection..cctor () [0x00000] in /Users/fak/Dropbox/Projects/sqlite-net/src/SQLite.cs:171 --- End of inner exception stack trace --- at mono.android.view.View_OnClickListenerImplementor.n_onClick(Native Method) at mono.android.view.View_OnClickListenerImplementor.onClick(View_OnClickListenerImplementor.java:30) at android.view.View.performClick(View.java:4780) at android.view.View$PerformClick.run(View.java:19866) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5254) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
在日志中我可以看到以下信息：
12-01 10:43:05.356 D/Mono (11194): DllImport attempting to load: 'e_sqlite3'. 12-01 10:43:05.358 D/Mono (11194): DllImport error loading library '/storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86//storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3" not found'. 12-01 10:43:05.360 D/Mono (11194): DllImport error loading library '/storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3.so': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86//storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3.so" not found'. 12-01 10:43:05.360 D/Mono (11194): DllImport error loading library '/system/lib/libe_sqlite3': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86//system/lib/libe_sqlite3" not found'. 12-01 10:43:05.360 D/Mono (11194): DllImport error loading library '/system/lib/libe_sqlite3.so': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86//system/lib/libe_sqlite3.so" not found'. 12-01 10:43:05.360 D/Mono (11194): DllImport error loading library 'libe_sqlite3': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86/libe_sqlite3" not found'. 12-01 10:43:05.361 D/Mono (11194): DllImport error loading library 'libe_sqlite3.so': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86/libe_sqlite3.so" not found'. 12-01 10:43:05.361 D/Mono (11194): DllImport error loading library 'e_sqlite3': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86/e_sqlite3" not found'. 12-01 10:43:05.362 D/Mono (11194): DllImport error loading library '/storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86//storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3" not found'. 12-01 10:43:05.364 D/Mono (11194): DllImport error loading library '/storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3.so': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86//storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3.so" not found'. 12-01 10:43:05.364 D/Mono (11194): DllImport error loading library '/system/lib/libe_sqlite3': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86//system/lib/libe_sqlite3" not found'. 12-01 10:43:05.364 D/Mono (11194): DllImport error loading library '/system/lib/libe_sqlite3.so': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86//system/lib/libe_sqlite3.so" not found'. 12-01 10:43:05.364 D/Mono (11194): DllImport error loading library 'libe_sqlite3': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86/libe_sqlite3" not found'. 12-01 10:43:05.364 D/Mono (11194): DllImport error loading library 'libe_sqlite3.so': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86/libe_sqlite3.so" not found'. 12-01 10:43:05.365 D/Mono (11194): DllImport error loading library 'libe_sqlite3': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86/libe_sqlite3" not found'. 12-01 10:43:05.365 W/Mono (11194): DllImport unable to load library 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86/libe_sqlite3" not found'. 12-01 10:43:05.365 D/Mono (11194): DllImport attempting to load: 'e_sqlite3'. 12-01 10:43:05.366 D/Mono (11194): DllImport error loading library '/storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86//storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3" not found'. 12-01 10:43:05.368 D/Mono (11194): DllImport error loading library '/storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3.so': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86//storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3.so" not found'. 12-01 10:43:05.368 D/Mono (11194): DllImport error loading library '/system/lib/libe_sqlite3': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86//system/lib/libe_sqlite3" not found'. 12-01 10:43:05.368 D/Mono (11194): DllImport error loading library '/system/lib/libe_sqlite3.so': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86//system/lib/libe_sqlite3.so" not found'. 12-01 10:43:05.368 D/Mono (11194): DllImport error loading library 'libe_sqlite3': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86/libe_sqlite3" not found'. 12-01 10:43:05.368 D/Mono (11194): DllImport error loading library 'libe_sqlite3.so': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86/libe_sqlite3.so" not found'. 12-01 10:43:05.369 D/Mono (11194): DllImport error loading library 'e_sqlite3': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86/e_sqlite3" not found'. 12-01 10:43:05.370 D/Mono (11194): DllImport error loading library '/storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86//storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3" not found'. 12-01 10:43:05.371 D/Mono (11194): DllImport error loading library '/storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3.so': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86//storage/emulated/0/Android/data/com.psonar.android/files/.override/libe_sqlite3.so" not found'. 12-01 10:43:05.372 D/Mono (11194): DllImport error loading library '/system/lib/libe_sqlite3': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86//system/lib/libe_sqlite3" not found'. 12-01 10:43:05.372 D/Mono (11194): DllImport error loading library '/system/lib/libe_sqlite3.so': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86//system/lib/libe_sqlite3.so" not found'. 12-01 10:43:05.372 D/Mono (11194): DllImport error loading library 'libe_sqlite3': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86/libe_sqlite3" not found'. 12-01 10:43:05.372 D/Mono (11194): DllImport error loading library 'libe_sqlite3.so': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86/libe_sqlite3.so" not found'. 12-01 10:43:05.373 D/Mono (11194): DllImport error loading library 'libe_sqlite3': 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86/libe_sqlite3" not found'. 12-01 10:43:05.373 W/Mono (11194): DllImport unable to load library 'dlopen failed: library "/data/app/com.psonar.android-1/lib/x86/libe_sqlite3" not found'.
很明显出了什么问题：System.DllNotFoundException: e_sqlite3 但是我找不到任何可以解决这个问题的相关信息。
我检查了我的 nuget 包，它们似乎都已正确安装。
我检查了包裹位置，都是正确的。非常不确定原因可能在哪里。
编辑： 在这里向包的作者报告： https://github.com/praeclarum/sqlite-net/issues/478
nuget 包也必须安装在我们的主要 droid 应用程序项目中。如果它安装在不是应用程序启动项目的解决方案项目中，则会产生这些问题。
我知道那是旧的 post，很抱歉简历， 要回答无法解决问题的@sagar-panwala，最简单的方法是解决该问题而不会对 nu-get 插件发疯，在为 android 编译时将 .droid 项目设置为 "StartupProject"：
可能是原来的nuget包有错误。