我是Proguard的新手，所以我可能犯了一个新手错误。我有一个应用程序，在我运行发布版本（使用Proguard进行模糊处理）后，它很快就会崩溃。我相信我已经把它缩小到了这样一个事实，它似乎混淆了我的参考库。在我的例子中，我的参考库被用来定义我的消息类，我正在使用这些消息类与另一台使用Google Protobbuffers的设备进行通信。我正在使用建筑，蚂蚁释放。我的proguard配置是：
-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontpreverify
-verbose
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
-keep public class * extends android.app.Activity
-keep public class * extends android.app.Application
-keep public class * extends android.app.Service
-keep public class * extends android.content.BroadcastReceiver
-keep public class * extends android.content.ContentProvider
-keep public class * extends android.app.backup.BackupAgentHelper
-keep public class * extends android.preference.Preference
-keep public class com.android.vending.licensing.ILicensingService
-keepclasseswithmembernames class *
{
native <methods>;
}
-keepclasseswithmembernames class *
{
public <init>(android.content.Context, android.util.AttributeSet);
}
-keepclasseswithmembernames class *
{
public <init>(android.content.Context, android.util.AttributeSet, int);
}
-keepclassmembers enum *
{
public static **[] values();
public static ** valueOf(java.lang.String);
}
-keep class * implements android.os.Parcelable
{
public static final android.os.Parcelable$Creator *;
}
在我的ant build.xml文件中，我定义了以下内容：
<target name="-obfuscate" unless="do.not.compile">
<if condition="${proguard.enabled}">
<then>
<property name="obfuscate.absolute.dir" location="${out.absolute.dir}/proguard" />
<property name="preobfuscate.jar.file" value="${obfuscate.absolute.dir}/original.jar" />
<property name="obfuscated.jar.file" value="${obfuscate.absolute.dir}/obfuscated.jar" />
<!-- input for dex will be proguard's output -->
<property name="out.dex.input.absolute.dir" value="${obfuscated.jar.file}" />
<!-- Add Proguard Tasks -->
<property name="proguard.jar" location="${android.tools.dir}/proguard/lib/proguard.jar" />
<taskdef name="proguard" classname="proguard.ant.ProGuardTask" classpath="${proguard.jar}" />
<!-- Set the android classpath Path object into a single property. It'll be
all the jar files separated by a platform path-separator.
-->
<property name="android.libraryjars" refid="android.target.classpath"/>
<!-- Build a path object with all the jar files that must be obfuscated.
This include the project compiled source code and any 3rd party jar
files.
-->
<path id="project.jars.ref">
<pathelement location="${preobfuscate.jar.file}" />
<path refid="jar.libs.ref" />
</path>
<!-- Set the project jar files Path object into a single property. It'll be
all the jar files separated by a platform path-separator.
-->
<property name="project.jars" refid="project.jars.ref" />
<mkdir dir="${obfuscate.absolute.dir}" />
<delete file="${preobfuscate.jar.file}" />
<delete file="${obfuscated.jar.file}" />
<jar basedir="${out.classes.dir}" destfile="${preobfuscate.jar.file}" />
<proguard>
@${proguard.config}
-injars ${project.jars}
-outjars ${obfuscated.jar.file}
-libraryjars ${android.libraryjars}
-dump ${obfuscate.absolute.dir}/dump.txt
-printseeds ${obfuscate.absolute.dir}/seeds.txt
-printusage ${obfuscate.absolute.dir}/usage.txt
-printmapping ${obfuscate.absolute.dir}/mapping.txt
</proguard>
</then>
</if>
</target>
<!-- Converts this project's .class files into .dex files -->
<target name="-dex" depends="compile, -post-compile, -obfuscate"
unless="do.not.compile">
<if condition="${manifest.hasCode}">
<then>
<dex-helper />
</then>
<else>
<echo>hasCode = false. Skipping...</echo>
</else>
</if>
</target>
<!-- Puts the project's resources into the output package file
This actually can create multiple resource package in case
Some custom apk with specific configuration have been
declared in default.properties.
-->
<target name="-package-resources">
<echo>Packaging resources</echo>
<aapt executable="${aapt}"
command="package"
versioncode="${version.code}"
debug="${build.packaging.debug}"
manifest="AndroidManifest.xml"
assets="${asset.absolute.dir}"
androidjar="${android.jar}"
apkfolder="${out.absolute.dir}"
resourcefilename="${resource.package.file.name}"
resourcefilter="${aapt.resource.filter}">
<res path="${resource.absolute.dir}" />
<!-- <nocompress /> forces no compression on any files in assets or res/raw -->
<!-- <nocompress extension="xml" /> forces no compression on specific file extensions in assets and res/raw -->
</aapt>
</target>
<!-- Packages the application and sign it with a debug key. -->
<target name="-package-debug-sign" depends="-dex, -package-resources">
<package-helper
output.filepath="${out.debug.unaligned.file}" />
</target>
<!-- Packages the application without signing it. -->
<target name="-package-release" depends="-dex, -package-resources">
<package-helper
output.filepath="${out.unsigned.file}"/>
</target>
<target name="-set-release-mode">
<!-- release mode is only valid if the manifest does not explicitly
set debuggable to true. default is false.
We actually store build.packaging.debug, not build.release -->
<xpath input="AndroidManifest.xml" expression="/manifest/application/@android:debuggable"
output="build.packaging.debug" default="false"/>
<!-- Enable proguard -->
<property name="proguard.enabled" value="true"/>
<property name="proguard.config" value="proguard.cfg"/>
<!-- signing mode: release -->
<property name="build.signing.debug" value="false" />
<if condition="${build.packaging.debug}">
<then>
<echo>*************************************************</echo>
<echo>**** Android Manifest has debuggable=true ****</echo>
<echo>**** Doing DEBUG packaging with RELEASE keys ****</echo>
<echo>*************************************************</echo>
</then>
<else>
<!-- property only set in release mode.
Useful for if/unless attributes in target node
when using Ant before 1.8 -->
<property name="build.mode.release" value="true"/>
</else>
</if>
</target>
<target name="release"
depends="-set-release-mode, -release-obfuscation-check, -package-release, -release-prompt-for-password, -release-nosign"
if="has.keystore"
description="Builds the application. The generated apk file must be signed before
it is published.">
<!-- Signs the APK -->
<echo>Signing final apk...</echo>
<signjar
jar="${out.unsigned.file}"
signedjar="${out.unaligned.file}"
keystore="${key.store}"
storepass="${key.store.password}"
alias="${key.alias}"
keypass="${key.alias.password}"
verbose="${verbose}" />
<!-- Zip aligns the APK -->
<zipalign-helper in.package="${out.unaligned.file}"
out.package="${out.release.file}" />
<echo>Release Package: ${out.release.file}</echo>
</target>
如果有任何想法，我将不胜感激。我从在线模板中复制了我的大部分构建和proguard配置，我怀疑我实际上是在入侵proguard来混淆库jar，或者我有一些配置不清的东西。在构建结束时，我在cmd窗口中看到以下输出：
[proguard] Writing output...
[proguard] Preparing output jar [C:WorkspaceUIMyAppbuildproguardobfuscated.jar]
[proguard] Copying resources from program jar [C:WorkspaceUIMyAppbuildproguardoriginal.jar]
[proguard] Copying resources from program jar [C:WorkspaceUIMyApplibslibmessaging.jar]
[proguard] Warning: can't write resource [META-INF/MANIFEST.MF] (Duplicate zip entry [libmessaging.jar:META-INF/MANIFEST.MF])
[proguard] Copying resources from program jar [C:WorkspaceUIMyApplibsprotobuf-2.3.0.jar]
[proguard] Warning: can't write resource [META-INF/MANIFEST.MF] (Duplicate zip entry [protobuf-2.3.0.jar:META-INF/MANIFEST.MF])
[proguard] Printing classes to [C:WorkspaceRiptide1_1_ptr_74WPG_HAWKSBILLUIMyAppbuildproguarddump.txt]...
谢谢！
您已经在Proguard配置中注释了库jar指令
更改：
# -libraryjars /libs/protobuf-2.3.0.jar
# -libraryjars /libs/libmessaging.jar
至：
-libraryjars /libs/protobuf-2.3.0.jar
-libraryjars /libs/libmessaging.jar
（然后不用麻烦在build.xml中定义库jar）
编辑：
我发现另一种让Proguard不使用库罐子的方法是要求它保留它们的包名，例如：
-keep class javax.** { *; }
-keep class org.** { *; }
-keep class twitter4j.** { *; }
proGuard加密jsoup-lib时，我也遇到了类似的问题。我通过将以下内容添加到我的proguard-rules.txt中修复了它：
-keep class org.jsoup** {
*;
}
因此build.gradle将以以下部分结束：
release {
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
}