大家好我跟 proguard 有些问题。我的项目中有这个罐子库：
当我在发布模式中构建消息窗口时显示：
Warning:library class android.content.res.XmlResourceParser extends or implements program class org.xmlpull.v1.XmlPullParser
Warning:com.caverock.androidsvg.SVGImageView: can't find referenced class com.caverock.androidsvg.R$styleable
Warning:com.caverock.androidsvg.SVGImageView: can't find referenced class com.caverock.androidsvg.R
Warning:org.apache.commons.io.FileUtils: can't find referenced method 'java.nio.file.Path toPath()' in library class java.io.File
Warning:org.apache.commons.io.FileUtils: can't find referenced class java.nio.file.Files
Warning:library class android.content.Intent depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.content.IntentFilter depends on program class org.xmlpull.v1.XmlSerializer
Warning:library class android.content.IntentFilter depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.content.res.ColorStateList depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.graphics.drawable.AnimatedVectorDrawable depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.graphics.drawable.AnimationDrawable depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.graphics.drawable.BitmapDrawable depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.graphics.drawable.ClipDrawable depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.graphics.drawable.ColorDrawable depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.graphics.drawable.Drawable depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.graphics.drawable.DrawableWrapper depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.graphics.drawable.GradientDrawable depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.graphics.drawable.InsetDrawable depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.graphics.drawable.LayerDrawable depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.graphics.drawable.RippleDrawable depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.graphics.drawable.ScaleDrawable depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.graphics.drawable.ShapeDrawable depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.graphics.drawable.StateListDrawable depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.graphics.drawable.VectorDrawable depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.util.Xml depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.util.Xml depends on program class org.xmlpull.v1.XmlSerializer
Warning:library class android.util.Xml depends on program class org.xmlpull.v1.XmlPullParser
Warning:library class android.view.LayoutInflater depends on program class org.xmlpull.v1.XmlPullParser
Warning:there were 5 unresolved references to classes or interfaces.
Warning:there were 32 instances of library classes depending on program classes.
Warning:there were 1 unresolved references to library class members.
Warning:Exception while processing task java.io.IOException: Please correct the above warnings first.
Error:Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'.
> Job failed, see logs for details
Information:BUILD FAILED in 1m 9s
Information:1 error
Information:32 warnings
Information:See complete output in console
然后我将其放入我的proguard-rules.pro：
-dontwarn org.xmlpull.v1.**
-keep class org.xmlpull.** { *; }
-dontwarn org.apache.commons.io.**
-keep class org.apache.commons.io.** { *; }
-dontwarn com.caverock.androidsvg.**
-keep class com.caverock.androidsvg.** { *; }
我的应用程序在首次启动时崩溃了，我不知道它是什么，请一些帮助会很棒。
答案 0 :(得分：0)
首先，您需要更改它们以包含库。不要使用jar，而是使用gradle依赖项。您可以查看mapsforge库integration guide。它应该是这样的：
dependencies {
// core mapsforge
implementation 'org.mapsforge:mapsforge-core:v0.9.1'
implementation 'org.mapsforge:mapsforge-map:v0.9.1'
implementation 'org.mapsforge:mapsforge-map-reader:v0.9.1'
implementation 'org.mapsforge:mapsforge-themes:v0.9.1'
implementation 'net.sf.kxml:kxml2:2.3.0'
// for android
implementation 'org.mapsforge:mapsforge-map-android:[CURRENT-VERSION]'
implementation 'com.caverock:androidsvg:1.2.2-beta-1'
implementation 'com.nineoldandroids:library:2.4.0'
}
第二，您不得使用此类内容作为库的proguard规则：
-keep class org.apache.commons.io.** { *; }
这意味着，告诉proguard不处理库并将整个库包含到发布应用程序中。
但是对于androidsvg库，你需要处理的是一个特殊的异常。您需要保留整个库（请在Crashes Proguard上阅读此问题）：
-dontwarn com.caverock.androidsvg.**
-keep class com.caverock.androidsvg.** { *; }
第三次，检查您的图片是否可绘制。可能是您将图像放在错误的可绘制目录中。