如何在 xamarin 表单中使用 proguard 优化器工具

Question

我想减小 .apk 文件的大小，所以我在 Android 项目的属性 window 中选中启用 ProGuard 选项，但出现编译时错误

Error "java.exe" exited with code 1.

我尝试了一些方法，例如

头大小已经1G了
Android 目标版本是 9.0(Pie)。
发布模式下我的解决方案配置。
使用最新的 ProGuard 文件(6.1.1)
在新的 ProGuard 文件中添加了 proguard-android.txt、proguard-android-optimize.txt 和 proguard-project.txt。

日志：

1>------ Rebuild All started: Project: DirectionApp, Configuration: Release Any CPU ------
1>DirectionApp -> D:\New\West\ReadOut\DirectionApp\DirectionApp\DirectionApp\bin\Release\netstandard2.0\DirectionApp.dll
2>------ Rebuild All started: Project: DirectionApp.Android, Configuration: Release Any CPU ------
2>  DirectionApp.Android -> D:\New\West\ReadOut\DirectionApp\DirectionApp\DirectionApp.Android\bin\Release\DirectionApp.Android.dll
2>  No way to resolve conflict between "mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" and "mscorlib, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e". Choosing "mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c5614e089" arbitrarily.
2>PROGUARD : warning : md5606e28f7ad4f2edd4892d456667ca4fb.EmdkWrapper: can't find superclass or interface com.symbol.emdk.EMDKManager$EMDKListener
2>PROGUARD : warning : mono.com.symbol.emdk.EMDKManager_EMDKListenerImplementor: can't find superclass or interface com.symbol.emdk.EMDKManager$EMDKListener
2>PROGUARD : warning : mono.com.symbol.emdk.EMDKManager_StatusListenerImplementor: can't find superclass or interface com.symbol.emdk.EMDKManager$StatusListener
2>PROGUARD : warning : mono.com.symbol.emdk.ProfileManager_DataListenerImplementor: can't find superclass or interface com.symbol.emdk.ProfileManager$DataListener
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.BarcodeManager_ScannerConnectionListenerImplementor: can't find superclass or interface com.symbol.emdk.barcode.BarcodeManager$ScannerConnectionListener
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.Scanner_DataListenerImplementor: can't find superclass or interface com.symbol.emdk.barcode.Scanner$DataListener
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.Scanner_StatusListenerImplementor: can't find superclass or interface com.symbol.emdk.barcode.Scanner$StatusListener
2>PROGUARD : warning : mono.com.symbol.emdk.scanandpair.ScanAndPairManager_StatusListenerImplementor: can't find superclass or interface com.symbol.emdk.scanandpair.ScanAndPairManager$StatusListener
2>PROGUARD : warning : mono.com.symbol.emdk.simulscan.SimulScanReader_DataListenerImplementor: can't find superclass or interface com.symbol.emdk.simulscan.SimulScanReader$DataListerner
2>PROGUARD : warning : mono.com.symbol.emdk.simulscan.SimulScanReader_StatusListenerImplementor: can't find superclass or interface com.symbol.emdk.simulscan.SimulScanReader$StatusListerner
2>PROGUARD : warning : md5606e28f7ad4f2edd4892d456667ca4fb.EmdkWrapper: can't find referenced class com.symbol.emdk.EMDKManager$EMDKListener
2>PROGUARD : warning : md5606e28f7ad4f2edd4892d456667ca4fb.EmdkWrapper: can't find referenced class com.symbol.emdk.EMDKManager
2>PROGUARD : warning : md5606e28f7ad4f2edd4892d456667ca4fb.EmdkWrapper: can't find referenced class com.symbol.emdk.EMDKManager
2>PROGUARD : warning : md5606e28f7ad4f2edd4892d456667ca4fb.EmdkWrapper: can't find referenced class com.symbol.emdk.EMDKManager
2>PROGUARD : warning : mono.com.symbol.emdk.EMDKManager_EMDKListenerImplementor: can't find referenced class com.symbol.emdk.EMDKManager$EMDKListener
2>PROGUARD : warning : mono.com.symbol.emdk.EMDKManager_EMDKListenerImplementor: can't find referenced class com.symbol.emdk.EMDKManager
2>PROGUARD : warning : mono.com.symbol.emdk.EMDKManager_EMDKListenerImplementor: can't find referenced class com.symbol.emdk.EMDKManager
2>PROGUARD : warning : mono.com.symbol.emdk.EMDKManager_EMDKListenerImplementor: can't find referenced class com.symbol.emdk.EMDKManager
2>PROGUARD : warning : mono.com.symbol.emdk.EMDKManager_StatusListenerImplementor: can't find referenced class com.symbol.emdk.EMDKManager$StatusListener
2>PROGUARD : warning : mono.com.symbol.emdk.EMDKManager_StatusListenerImplementor: can't find referenced class com.symbol.emdk.EMDKManager$StatusData
2>PROGUARD : warning : mono.com.symbol.emdk.EMDKManager_StatusListenerImplementor: can't find referenced class com.symbol.emdk.EMDKManager
2>PROGUARD : warning : mono.com.symbol.emdk.EMDKManager_StatusListenerImplementor: can't find referenced class com.symbol.emdk.EMDKManager$StatusData
2>PROGUARD : warning : mono.com.symbol.emdk.EMDKManager_StatusListenerImplementor: can't find referenced class com.symbol.emdk.EMDKBase
2>PROGUARD : warning : mono.com.symbol.emdk.EMDKManager_StatusListenerImplementor: can't find referenced class com.symbol.emdk.EMDKManager$StatusData
2>PROGUARD : warning : mono.com.symbol.emdk.EMDKManager_StatusListenerImplementor: can't find referenced class com.symbol.emdk.EMDKBase
2>PROGUARD : warning : mono.com.symbol.emdk.ProfileManager_DataListenerImplementor: can't find referenced class com.symbol.emdk.ProfileManager$DataListener
2>PROGUARD : warning : mono.com.symbol.emdk.ProfileManager_DataListenerImplementor: can't find referenced class com.symbol.emdk.ProfileManager$ResultData
2>PROGUARD : warning : mono.com.symbol.emdk.ProfileManager_DataListenerImplementor: can't find referenced class com.symbol.emdk.ProfileManager
2>PROGUARD : warning : mono.com.symbol.emdk.ProfileManager_DataListenerImplementor: can't find referenced class com.symbol.emdk.ProfileManager$ResultData
2>PROGUARD : warning : mono.com.symbol.emdk.ProfileManager_DataListenerImplementor: can't find referenced class com.symbol.emdk.ProfileManager$ResultData
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.BarcodeManager_ScannerConnectionListenerImplementor: can't find referenced class com.symbol.emdk.barcode.BarcodeManager$ScannerConnectionListener
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.BarcodeManager_ScannerConnectionListenerImplementor: can't find referenced class com.symbol.emdk.barcode.BarcodeManager$ConnectionState
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.BarcodeManager_ScannerConnectionListenerImplementor: can't find referenced class com.symbol.emdk.barcode.BarcodeManager
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.BarcodeManager_ScannerConnectionListenerImplementor: can't find referenced class com.symbol.emdk.barcode.ScannerInfo
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.BarcodeManager_ScannerConnectionListenerImplementor: can't find referenced class com.symbol.emdk.barcode.BarcodeManager$ConnectionState
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.BarcodeManager_ScannerConnectionListenerImplementor: can't find referenced class com.symbol.emdk.barcode.ScannerInfo
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.BarcodeManager_ScannerConnectionListenerImplementor: can't find referenced class com.symbol.emdk.barcode.BarcodeManager$ConnectionState
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.Scanner_DataListenerImplementor: can't find referenced class com.symbol.emdk.barcode.Scanner$DataListener
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.Scanner_DataListenerImplementor: can't find referenced class com.symbol.emdk.barcode.Scanner
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.Scanner_DataListenerImplementor: can't find referenced class com.symbol.emdk.barcode.ScanDataCollection
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.Scanner_DataListenerImplementor: can't find referenced class com.symbol.emdk.barcode.ScanDataCollection
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.Scanner_StatusListenerImplementor: can't find referenced class com.symbol.emdk.barcode.Scanner$StatusListener
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.Scanner_StatusListenerImplementor: can't find referenced class com.symbol.emdk.barcode.Scanner
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.Scanner_StatusListenerImplementor: can't find referenced class com.symbol.emdk.barcode.StatusData
2>PROGUARD : warning : mono.com.symbol.emdk.barcode.Scanner_StatusListenerImplementor: can't find referenced class com.symbol.emdk.barcode.StatusData
2>PROGUARD : warning : mono.com.symbol.emdk.scanandpair.ScanAndPairManager_StatusListenerImplementor: can't find referenced class com.symbol.emdk.scanandpair.ScanAndPairManager$StatusListener
2>PROGUARD : warning : mono.com.symbol.emdk.scanandpair.ScanAndPairManager_StatusListenerImplementor: can't find referenced class com.symbol.emdk.scanandpair.ScanAndPairManager
2>PROGUARD : warning : mono.com.symbol.emdk.scanandpair.ScanAndPairManager_StatusListenerImplementor: can't find referenced class com.symbol.emdk.scanandpair.StatusData
2>PROGUARD : warning : mono.com.symbol.emdk.scanandpair.ScanAndPairManager_StatusListenerImplementor: can't find referenced class com.symbol.emdk.scanandpair.StatusData
2>PROGUARD : warning : mono.com.symbol.emdk.simulscan.SimulScanReader_DataListenerImplementor: can't find referenced class com.symbol.emdk.simulscan.SimulScanReader$DataListerner
2>PROGUARD : warning : mono.com.symbol.emdk.simulscan.SimulScanReader_DataListenerImplementor: can't find referenced class com.symbol.emdk.simulscan.SimulScanReader
2>PROGUARD : warning : mono.com.symbol.emdk.simulscan.SimulScanReader_DataListenerImplementor: can't find referenced class com.symbol.emdk.simulscan.SimulScanData
2>PROGUARD : warning : mono.com.symbol.emdk.simulscan.SimulScanReader_DataListenerImplementor: can't find referenced class com.symbol.emdk.simulscan.SimulScanData
2>PROGUARD : warning : mono.com.symbol.emdk.simulscan.SimulScanReader_StatusListenerImplementor: can't find referenced class com.symbol.emdk.simulscan.SimulScanReader$StatusListerner
2>PROGUARD : warning : mono.com.symbol.emdk.simulscan.SimulScanReader_StatusListenerImplementor: can't find referenced class com.symbol.emdk.simulscan.SimulScanReader
2>PROGUARD : warning : mono.com.symbol.emdk.simulscan.SimulScanReader_StatusListenerImplementor: can't find referenced class com.symbol.emdk.simulscan.SimulScanStatusData
2>PROGUARD : warning : mono.com.symbol.emdk.simulscan.SimulScanReader_StatusListenerImplementor: can't find referenced class com.symbol.emdk.simulscan.SimulScanStatusData
2>PROGUARD : warning : there were 57 unresolved references to classes or interfaces.
2>C:\Program Files (x86)\Microsoft Visual Studio17\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2550,3): error MSB6006: "java.exe" exited with code 1.
========== Rebuild All: 1 succeeded, 1 failed, 0 skipped ==========

我该如何解决这个问题？我想修复上面 error 不仅是警告。

Answer 1

按照以下步骤操作

首先，您需要将 proguard.cfg 添加到 android 项目级别。
将 proguard.cfg 文件构建操作更改为 ProguardConfiguration
将使用 Notepad++ 的 proguard.cfg 文件编码更改为 UTF-8

如果收到警告，则需要使用如下所示的 -dontwarn 属性

-dontwarn com.symbol.emdk.**
-dontwarn org.apache.http.**
-dontwarn com.appdynamics.eumagent.runtime.**

您必须 remove/solve 发出警告，因为那会导致上述错误。上面的代码将删除您的所有警告。
如果在执行应用程序后出现异常，则需要使用 -keep 属性。如下所示，需要类

-keep public class android.support.v7.widget.** { *; }

如何在 xamarin 表单中使用 proguard 优化器工具

How to use proguard optimizer tool with xamarin forms

android

proguard

xamarin

xamarin.forms