android 库项目中的方法引用过多 - ClassNotFoundException

Question

我有一个库项目，我正在使用 AAR 文件在主 android 项目中使用它。我现在得到了我所期望的著名的 65k 方法限制，但我几乎没有疑问。

我在主项目的 libs 文件夹中添加了 AAR 文件，并在 build.gradle 中编译了相同的文件。

1) 我是否需要在库和主 android 项目中添加多 dex 支持？

2) 我需要在两个项目中添加 afterEvaluate 脚本吗？

最重要的是，如果我们让 multi-dex 工作，我们可能会遇到问题，在主 android 项目中，如果我们尝试使用的任何 class 不在主项目中，我们会得到 Classnotfound 异常dex 列表。

编辑：- 我正在尝试根据我的测试不断发布更新，以便任何有想法的人都可以帮助我们所有人。

项目中使用的依赖项:-

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support:appcompat-v7:22.2.1'
    compile 'com.google.android.gms:play-services-gcm:7.8.0'
    compile 'com.google.android.gms:play-services-location:7.8.0'
    compile 'com.google.android.gms:play-services-ads:7.8.0'
    compile 'co.pointwise:pw-proto:0.0.5'
    compile 'com.amazonaws:aws-android-sdk-sns:2.2.1'
    compile 'com.amazonaws:aws-android-sdk-core:2.2.1'
    compile 'com.github.tony19:logback-android-core:1.1.1-4'
    compile 'com.github.tony19:logback-android-classic:1.1.1-4'
    compile 'org.slf4j:slf4j-api:1.7.6'
    compile 'com.android.support:multidex:1.0.0'
    compile(name: 'sdk-debug', ext: 'aar') // my library project

    // Crashlytics Kit
    compile('com.crashlytics.sdk.android:crashlytics:2.5.1@aar') {
        transitive = true
    }
}

17-08-2015 - 根据文档，我修改了我的代码及其现在的工作，但我无法使用 proguard 生成签名的 apk。

Proguard 文件看起来像：-

-keep class ch.qos.** { *; }
-keep class org.slf4j.** { *; }
-keep class io.protostuff.** { *; }
-keep class com.google.common.** { *; }
-keep com.amazonaws.http.** { *; }
-keep com.amazonaws.internal.** { *; }
-keepattributes *Annotation*

-keep class * extends java.util.ListResourceBundle {
    protected Object[][] getContents();
}

# Keep SafeParcelable value, needed for reflection. This is required to support backwards
# compatibility of some classes.
-keep public class com.google.android.gms.common.internal.safeparcel.SafeParcelable {
    public static final *** NULL;
}

# Keep the names of classes/members we need for client functionality.
-keepnames @com.google.android.gms.common.annotation.KeepName class *
-keepclassmembernames class * {
    @com.google.android.gms.common.annotation.KeepName *;
}

# Needed for Parcelable/SafeParcelable Creators to not get stripped
-keepnames class * implements android.os.Parcelable {
    public static final ** CREATOR;
}

错误：-

Warning: com.amazonaws.AmazonWebServiceClient: can't find referenced class org.apache.commons.logging.LogFactory
Warning: ch.qos.logback.core.net.SMTPAppenderBase: can't find referenced class javax.mail.internet.MimeMessage
Warning: com.google.common.base.Absent: can't find referenced class javax.annotation.Nullable
Warning: there were 1406 unresolved references to classes or interfaces.
         You may need to add missing library jars or update their versions.
         If your code works fine without the missing classes, you can suppress
         the warnings with '-dontwarn' options.
         (http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedclass)
Warning: there were 9 unresolved references to program class members.
         Your input classes appear to be inconsistent.
         You may need to recompile the code.
         (http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedprogramclassmember)
:app:proguardProdRelease FAILED

我之前也遇到过这个问题，在上一个项目中无法解决，这次我需要解决。

有什么想法吗？

Answer 1

首先，查看 official documentation - 它详细解释了如何添加多 dex 支持。

答案：

Do I need to add multi-dex support in both library as well as main android project?

仅在主 Android 项目中指定 'multiDexEnabled = true'（在 defaultConfig 下）。无需在库中声明它。

Do I need to add afterEvaluate script in both project?

Android Gradle 插件的

v0.14.0 添加了对 multi-dex 的支持，您不再需要添加您提到的代码。插件会自动创建主dex列表，并将需要的信息传递给dex进程。

Post 结果，如果您仍然遇到 ClassNotFoundException 错误，请告诉我们。

I'm receiving the following error when trying to build a release variant with proguard:
Warning: com.amazonaws.AmazonWebServiceClient: can't find referenced class org.apache.commons.logging.LogFactory

在他们的 github repo, AWS authors included instructions 中了解如何设置 proguard 配置：

-keep class org.apache.commons.logging.**               { *; }
-keep class com.amazonaws.services.sqs.QueueUrlHandler  { *; }
-keep class com.amazonaws.javax.xml.transform.sax.*     { public *; }
-keep class com.amazonaws.javax.xml.stream.**           { *; }
-keep class com.amazonaws.services.**.model.*Exception* { *; }
-keep class com.amazonaws.internal.**                   { *; }
-keep class org.codehaus.**                             { *; }
-keep class org.joda.convert.*                          { *; }
-keepattributes Signature,*Annotation*,EnclosingMethod
-keepnames class com.fasterxml.jackson.** { *; }
-keepnames class com.amazonaws.** { *; }

-dontwarn com.amazonaws.auth.policy.conditions.S3ConditionFactory
-dontwarn org.joda.time.**
-dontwarn com.fasterxml.jackson.databind.**
-dontwarn javax.xml.stream.events.**
-dontwarn org.codehaus.jackson.**
-dontwarn org.apache.commons.logging.impl.**
-dontwarn org.apache.http.conn.scheme.**
-dontwarn org.apache.http.annotation.**
-dontwarn org.ietf.jgss.**
-dontwarn org.w3c.dom.bootstrap.**

请注意，您的混淆器配置缺少 org.apache.commons.logging.** 条目。

android 库项目中的方法引用过多 - ClassNotFoundException

Too many method references in android library project - ClassNotFoundException

android

android-library

android-multidex

android-proguard