在Xamarin.Forms项目中，我添加了ModernHTTPClient库，现在ProGuard步骤中断了错误：
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.
（之前我在使用ProGuard方面遇到了一些问题，但是通过将ProGuard升级到最新版本，我可以通过Android 7.1来实现它。）
日志文件中的一些细节如下。
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，请与我们联系。感谢。
答案 0 :(得分：5)
听起来您需要做的就是将proguard.cfg文件添加到项目中，并将构建操作设置为ProguardConfiguration以删除所有警告并保留所有必需的类，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();
}