Android - Proguard 未使用 Joda Time jar 文件编译

Question

我在我的android项目中使用了Joda time API，当我导出一个签名的apk时我的项目没有编译，它显示错误“Proguard返回错误代码1。见控制台”，下面是错误日志，

[2013-07-20 00:50:25 - CC] Proguard returned with error code 1. See console
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.DateMidnight: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.DateTime: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.DateTimeZone: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.DateTimeZone: can't find referenced class org.joda.convert.ToString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.Days: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.Days: can't find referenced class org.joda.convert.ToString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.Duration: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.Hours: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.Hours: can't find referenced class org.joda.convert.ToString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.Instant: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.LocalDate: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.LocalDate: can't find referenced class org.joda.convert.ToString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.LocalDateTime: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.LocalDateTime: can't find referenced class org.joda.convert.ToString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.LocalTime: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.LocalTime: can't find referenced class org.joda.convert.ToString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.Minutes: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.Minutes: can't find referenced class org.joda.convert.ToString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.MonthDay: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.MonthDay: can't find referenced class org.joda.convert.ToString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.Months: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.Months: can't find referenced class org.joda.convert.ToString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.MutableDateTime: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.MutableDateTime: can't find referenced class org.joda.convert.ToString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.MutablePeriod: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.Period: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.Seconds: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.Seconds: can't find referenced class org.joda.convert.ToString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.Weeks: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.Weeks: can't find referenced class org.joda.convert.ToString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.YearMonth: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.YearMonth: can't find referenced class org.joda.convert.ToString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.Years: can't find referenced class org.joda.convert.FromString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.Years: can't find referenced class org.joda.convert.ToString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.base.AbstractDuration: can't find referenced class org.joda.convert.ToString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.base.AbstractInstant: can't find referenced class org.joda.convert.ToString
[2013-07-20 00:50:25 - CC] Warning: org.joda.time.base.AbstractPeriod: can't find referenced class org.joda.convert.ToString
[2013-07-20 00:50:25 - CC]       You should check if you need to specify additional program jars.
[2013-07-20 00:50:25 - CC] Warning: there were 37 unresolved references to classes or interfaces.
[2013-07-20 00:50:25 - CC]          You may need to specify additional library jars (using '-libraryjars').
[2013-07-20 00:50:25 - CC] java.io.IOException: Please correct the above warnings first.
[2013-07-20 00:50:25 - CC]  at proguard.Initializer.execute(Initializer.java:321)
[2013-07-20 00:50:25 - CC]  at proguard.ProGuard.initialize(ProGuard.java:211)
[2013-07-20 00:50:25 - CC]  at proguard.ProGuard.execute(ProGuard.java:86)
[2013-07-20 00:50:25 - CC]  at proguard.ProGuard.main(ProGuard.java:492)

我的 proguard.cfg 文件看起来像，

-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>;
}

-keepclasseswithmembers class * {
    public <init>(android.content.Context, android.util.AttributeSet);
}

-keepclasseswithmembers class * {
    public <init>(android.content.Context, android.util.AttributeSet, int);
}

-keepclassmembers class * extends android.app.Activity {
   public void *(android.view.View);
}

-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}

-keep class * implements android.os.Parcelable {
  public static final android.os.Parcelable$Creator *;
}

谁能帮我解决这个问题？我需要发布我的应用程序。 该解决方案将不胜感激。 提前致谢。

Answer 1

如果不需要缺少的类，您可以取消警告：

-dontwarn org.joda.convert.**

参见 ProGuard 手册 > 疑难解答 > Warning: can't find referenced class

Answer 2

基于此处的帖子：https://plus.google.com/112998433182673852267/posts/ApBBBjv9szw

实际发生的情况是缺少的“FromString”类是一个注释，它实际上并未作为类文件存在于 joda-time-2.0.jar 中。有人声称 (http://www.scala-lang.org/node/10575) 缺少注释类文件不应该影响编译，这听起来是正确的，但我不知道这是在哪里正式声明的。

您需要将http://joda-convert.sourceforge.net/ 添加到项目的构建路径中。

Answer 3

我通过将以下内容添加到我的 build.gradle > 依赖项块来修复它：

dependencies {
    implementation group: 'org.joda', name: 'joda-convert', version: '2.0.1', classifier: 'classic'
    implementation 'joda-time:joda-time:2.9.4'
}