xamarin - ProGuard:添加 ModernHTTPClient 后， "java.exe"退出并显示代码 1

Question

在 Xamarin.Forms 项目中，我添加了 ModernHTTPClient 库，现在 ProGuard 步骤因错误而中断:

C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2025,3):错误 MSB6006:“java.exe”退出并显示代码 1。

(之前，我在使用 ProGuard 时遇到了一些问题，但通过将 ProGuard 升级到最新版本，能够在针对 Android 7.1 的情况下使其正常工作。)

日志文件中的一些详细信息如下。

2>  Proguard (TaskId:363)
2>    AndroidSdkDirectory: C:\android-sdk\ (TaskId:363)
2>    JavaPlatformJarPath: C:\android-sdk\platforms\android-25\android.jar (TaskId:363)
2>    ClassesOutputDirectory: obj\Release\android\bin\classes (TaskId:363)
2>    AcwMapFile: obj\Release\acw-map.txt (TaskId:363)
2>    ProguardGeneratedApplicationConfiguration: obj\Release\proguard\proguard_project_primary.cfg (TaskId:363)
2>    ProguardJarInput: obj\Release\proguard\__proguard_input__.jar (TaskId:363)
2>    ProguardJarOutput: obj\Release\proguard\__proguard_output__.jar (TaskId:363)
2>    ProguardGeneratedReferenceConfiguration: (TaskId:363)
2>      obj\Release\proguard\proguard_project_references.cfg (TaskId:363)
2>    ProguardGeneratedApplicationConfiguration: (TaskId:363)
2>      obj\Release\proguard\proguard_project_primary.cfg (TaskId:363)
2>    ProguardCommonXamarinConfiguration: (TaskId:363)
2>      obj\Release\proguard\proguard_xamarin.cfg (TaskId:363)
2>    ProguardConfigurationFiles: (TaskId:363)
2>      
2>          {sdk.dir}tools\proguard\proguard-android.txt;
2>          {intermediate.common.xamarin};
2>          {intermediate.references};
2>          {intermediate.application};
2>          ;
2>       (TaskId:363)
2>    ExternalJavaLibraries: (TaskId:363)
2>    DoNotPackageJavaLibraries: (TaskId:363)
2>    UseProguard: False (TaskId:363)
2>    EnableLogging: False (TaskId:363)
2>    DumpOutput: obj\Release\proguard\dump.txt (TaskId:363)
2>    PrintSeedsOutput: obj\Release\proguard\seeds.txt (TaskId:363)
2>    PrintMappingOutput: obj\Release\proguard\mapping.txt (TaskId:363)
2>  Environment Variables passed to tool: (TaskId:363)
2>    JAVA_TOOL_OPTIONS=-Dfile.encoding=UTF8 (TaskId:363)
2>  C:\Program Files\Java\jdk1.8.0_121\\bin\java.exe -jar C:\android-sdk\tools\proguard\lib\proguard.jar -include C:\android-sdk\\tools\proguard\proguard-android.txt -include obj\Release\proguard\proguard_xamarin.cfg -include obj\Release\proguard\proguard_project_references.cfg -include obj\Release\proguard\proguard_project_primary.cfg "-injars 'obj\Release\proguard\__proguard_input__.jar';'C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\Common7\IDE\ReferenceAssemblies\Microsoft\Framework\MonoAndroid\v7.1\mono.android.jar';'obj\Release\__library_projects__\FormsViewGroup\library_project_imports\formsviewgroup.jar';'obj\Release\__library_projects__\OkHttp\library_project_imports\okhttp-2.3.0-jar-with-dependencies.jar';'C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.Animated.Vector.Drawable\23.3.0.0\embedded\classes.jar';'C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.Design\23.3.0.0\embedded\classes.jar';'C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.v4\23.3.0.0\embedded\classes.jar';'C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.v4\23.3.0.0\embedded\libs\internal_impl-23.3.0.jar';'C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.v7.AppCompat\23.3.0.0\embedded\classes.jar';'C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.v7.CardView\23.3.0.0\embedded\classes.jar';'C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.v7.MediaRouter\23.3.0.0\embedded\classes.jar';'C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.v7.MediaRouter\23.3.0.0\embedded\libs\internal_impl-23.3.0.jar';'C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.v7.RecyclerView\23.3.0.0\embedded\classes.jar';'C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.Vector.Drawable\23.3.0.0\embedded\classes.jar'" "-libraryjars 'C:\android-sdk\platforms\android-25\android.jar'" -outjars "obj\Release\proguard\__proguard_output__.jar" -optimizations !code/allocation/variable  (TaskId:363)
2>  ProGuard, version 5.3.3 (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'android.support.design.widget.Snackbar$Callback$DismissEvent' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'android.support.design.widget.Snackbar$Callback' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'android.support.design.widget.Snackbar$Duration' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'android.support.design.widget.CoordinatorLayout$Behavior' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'android.support.design.widget.CoordinatorLayout$DefaultBehavior' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'android.support.design.internal.NavigationMenuPresenter$NavigationMenuHeaderItem' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'android.support.design.internal.NavigationMenuPresenter$NavigationMenuItem' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'android.support.design.internal.NavigationMenuPresenter$NavigationMenuTextItem' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'android.support.design.internal.NavigationMenuPresenter$ViewHolder' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'android.support.design.widget.AppBarLayout$LayoutParams$ScrollFlags' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'android.support.design.widget.AppBarLayout$OnOffsetChangedListener' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'mono.android.support.design.widget.AppBarLayout_OnOffsetChangedListenerImplementor' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'android.support.design.widget.BottomSheetBehavior$State' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'android.support.design.widget.FloatingActionButton$OnVisibilityChangedListener' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'android.support.design.widget.HeaderBehavior' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'android.support.design.widget.HeaderScrollingViewBehavior' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'android.support.design.widget.NavigationView$OnNavigationItemSelectedListener' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'mono.android.support.design.widget.NavigationView_OnNavigationItemSelectedListenerImplementor' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'android.support.design.widget.SwipeDismissBehavior$OnDismissListener' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'mono.android.support.design.widget.SwipeDismissBehavior_OnDismissListenerImplementor' (TaskId:363)
...
2>  Note: the configuration doesn't specify which class members to keep for class 'com.squareup.okhttp.Authenticator' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'com.squareup.okhttp.Callback' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'com.squareup.okhttp.Interceptor$Chain' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'com.squareup.okhttp.Interceptor' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'okio.ForwardingSink' (TaskId:363)
2>  Note: the configuration doesn't specify which class members to keep for class 'okio.ForwardingSource' (TaskId:363)
...
2>  Reading program jar [C:\Users\user\Desktop\MyProjectXXX\MyProjectXXX.Mobile\MyProjectXXX.Mobile.Android\obj\Release\__library_projects__\FormsViewGroup\library_project_imports\formsviewgroup.jar] (TaskId:363)
2>  Reading program jar [C:\Users\user\Desktop\MyProjectXXX\MyProjectXXX.Mobile\MyProjectXXX.Mobile.Android\obj\Release\__library_projects__\OkHttp\library_project_imports\okhttp-2.3.0-jar-with-dependencies.jar] (TaskId:363)
2>  Reading program jar [C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.Animated.Vector.Drawable\23.3.0.0\embedded\classes.jar] (TaskId:363)
2>  Reading program jar [C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.Design\23.3.0.0\embedded\classes.jar] (TaskId:363)
2>  Reading program jar [C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.v4\23.3.0.0\embedded\classes.jar] (TaskId:363)
2>  Reading program jar [C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.v4\23.3.0.0\embedded\libs\internal_impl-23.3.0.jar] (TaskId:363)
2>  Reading program jar [C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.v7.AppCompat\23.3.0.0\embedded\classes.jar] (TaskId:363)
2>  Reading program jar [C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.v7.CardView\23.3.0.0\embedded\classes.jar] (TaskId:363)
2>  Reading program jar [C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.v7.MediaRouter\23.3.0.0\embedded\classes.jar] (TaskId:363)
2>  Reading program jar [C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.v7.MediaRouter\23.3.0.0\embedded\libs\internal_impl-23.3.0.jar] (TaskId:363)
2>  Reading program jar [C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.v7.RecyclerView\23.3.0.0\embedded\classes.jar] (TaskId:363)
2>  Reading program jar [C:\Users\user\AppData\Local\Xamarin\Xamarin.Android.Support.Vector.Drawable\23.3.0.0\embedded\classes.jar] (TaskId:363)
2>  Reading library jar [C:\android-sdk\platforms\android-25\android.jar] (TaskId:363)
2>  Initializing... (TaskId:363)
2>  Note: the configuration refers to the unknown class 'com.google.vending.licensing.ILicensingService' (TaskId:363)
2>  Note: the configuration refers to the unknown class 'com.android.vending.licensing.ILicensingService' (TaskId:363)
2>  Note: the configuration refers to the unknown class 'android.support.annotation.Keep' (TaskId:363)
2>  Note: the configuration refers to the unknown class 'android.support.annotation.Keep' (TaskId:363)
2>  Note: the configuration refers to the unknown class 'android.support.annotation.Keep' (TaskId:363)
2>  Note: the configuration refers to the unknown class 'android.support.annotation.Keep' (TaskId:363)
2>  Note: the configuration refers to the unknown class 'android.support.annotation.Keep' (TaskId:363)
2>  Note: android.support.v4.app.NotificationCompatJellybean calls 'Field.getType' (TaskId:363)
2>PROGUARD : warning : okio.DeflaterSink: can't find referenced class org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
2>PROGUARD : warning : okio.Okio: can't find referenced class java.nio.file.Files
2>PROGUARD : warning : okio.Okio: can't find referenced class java.nio.file.Files
2>PROGUARD : warning : okio.Okio: can't find referenced class java.nio.file.Files
2>PROGUARD : warning : okio.Okio: can't find referenced class java.nio.file.Path
2>PROGUARD : warning : okio.Okio: can't find referenced class java.nio.file.OpenOption
2>PROGUARD : warning : okio.Okio: can't find referenced class java.nio.file.Path
...
2>  Note: there were 7 references to unknown classes. (TaskId:363)
2>        You should check your configuration for typos. (TaskId:363)
2>        (http://proguard.sourceforge.net/manual/troubleshooting.html#unknownclass) (TaskId:363)
2>  Note: there were 1 classes trying to access generic signatures using reflection. (TaskId:363)
2>        You should consider keeping the signature attributes (TaskId:363)
2>        (using '-keepattributes Signature'). (TaskId:363)
2>        (http://proguard.sourceforge.net/manual/troubleshooting.html#attributes) (TaskId:363)
2>  Note: there were 15 unkept descriptor classes in kept class members. (TaskId:363)
2>        You should consider explicitly keeping the mentioned classes (TaskId:363)
2>        (using '-keep'). (TaskId:363)
2>        (http://proguard.sourceforge.net/manual/troubleshooting.html#descriptorclass) (TaskId:363)
2>  Note: there were 9 unresolved dynamic references to classes or interfaces. (TaskId:363)
2>        You should check if you need to specify additional program jars. (TaskId:363)
2>        (http://proguard.sourceforge.net/manual/troubleshooting.html#dynamicalclass) (TaskId:363)
2>  Note: there were 3 accesses to class members by means of introspection. (TaskId:363)
2>        You should consider explicitly keeping the mentioned class members (TaskId:363)
2>        (using '-keep' or '-keepclassmembers'). (TaskId:363)
2>        (http://proguard.sourceforge.net/manual/troubleshooting.html#dynamicalclassmember) (TaskId:363)
2>PROGUARD : warning : there were 14 unresolved references to classes or interfaces.
2>           You may need to add missing library jars or update their versions. (TaskId:363)
2>           If your code works fine without the missing classes, you can suppress (TaskId:363)
2>           the warnings with '-dontwarn' options. (TaskId:363)
2>           (http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedclass) (TaskId:363)
2>  java.io.IOException: Please correct the above warnings first. (TaskId:363)
2>      at proguard.Initializer.execute(Initializer.java:473) (TaskId:363)
2>      at proguard.ProGuard.initialize(ProGuard.java:233) (TaskId:363)
2>      at proguard.ProGuard.execute(ProGuard.java:98) (TaskId:363)
2>      at proguard.ProGuard.main(ProGuard.java:538) (TaskId:363)
2>  Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF8 (TaskId:363)
2>C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2025,3): error MSB6006: "java.exe" exited with code 1.
2>Done executing task "Proguard" -- FAILED. (TaskId:363)
2>Done building target "_CompileToDalvikWithDx" in project "MyProjectXXX.Mobile.Android.csproj" -- FAILED.: (TargetId:310)
2>

我尝试将 Java 堆大小增加到 1G，但这没有效果。

如果您对如何解决此问题有任何想法，请告诉我。谢谢。

Answer 1

听起来您需要做的就是将一个 proguard.cfg 文件添加到您的项目中，并将构建操作设置为 ProguardConfiguration 以删除任何警告并保留任何必要的类例如:

# General Android
-dontwarn org.apache.http.**
-dontwarn android.net.http.AndroidHttpClient

# Android Support Library
-keep class android.support.multidex.MultiDexApplication
-keep class android.support.v4.**
-keep class android.support.v7.** {
    public *;
}

# Google Play Billing
-keep class com.android.vending.billing.**

# Google Play Services
-dontwarn com.google.android.gms.internal.*
-keep class * extends java.util.ListResourceBundle {
    protected java.lang.Object[][] getContents();
}