Android Proguard 在 android.app.Activity 中找不到方法

Question

生成签名的 APK 时出现以下 Proguard 错误。我已将 minifyEnabled 和 shrinkResources 设置为 true

can't find referenced method 'void onMultiWindowModeChanged(boolean)' in library class android.app.Activity
can't find referenced method 'boolean isInMultiWindowMode()' in library class android.app.Activity

我想保留 minifyEnabled shrinkResources 用于生产。

我需要在我的 proguard-rules 中添加什么来保留上面的成员并消除错误？

这是我冗长的 Proguard 规则文件：

#-dontobfuscate

#-optimizations !code/simplification/arithmetic
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*,!code/allocation/variable
#-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*,!code/simplification/cast
#-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*,!code/simplification/cast


-optimizationpasses 5

-dontpreverify

#-allowaccessmodification

-dontskipnonpubliclibraryclasses
-adaptresourcefilenames
-adaptresourcefilecontents
-flattenpackagehierarchy


-dontwarn org.jdom2.**
-dontwarn org.apache.**
-dontwarn org.google.common.collect.**
-dontwarn com.google.common.**


#-keep class * implements java.io.Serializable
-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
-keep public class android.widget.ProgressBar
-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 *;
}


# ------------------------------------------
# Crashlytics
# ------------------------------------------
-keepattributes *Annotation*
#-keepattributes SourceFile,LineNumberTable
-keepattributes LineNumberTable
-keep public class * extends java.lang.Exception
-keep class com.crashlytics.** { *; }
-dontwarn com.crashlytics.**


-dontwarn com.viewpagerindicator.LinePageIndicator


# ------------------------------------------
# RETROFIT config
# ------------------------------------------
-dontwarn retrofit.**
-keep class retrofit.** { *; }
-keepattributes Signature
-keepattributes Exceptions
-dontwarn retrofit2.**
-keep class retrofit2.** { *; }


# ------------------------------------------
# FABRIC TWITTER config
# ------------------------------------------
-dontwarn com.squareup.okhttp.**
-dontwarn com.google.appengine.api.urlfetch.**
-dontwarn rx.**
-dontwarn retrofit.**
-keepattributes Signature
-keepattributes *Annotation*
-keep class com.squareup.okhttp.** { *; }
-keep interface com.squareup.okhttp.** { *; }
-keep class retrofit.** { *; }
#-keepclasseswithmembers class * {
#    @retrofit.http.* <methods>;
#}


# ------------------------------------------
# OKIO config
# ------------------------------------------
-dontwarn okio.**
-keep class okio.** { *; }



# ------------------------------------------
# InMobi config
# ------------------------------------------
-keep class android.app.Activity
-keep class android.app.Activity.**

-keepattributes SourceFile,LineNumberTable
-keep class com.inmobi.** { *; }
-keep public class com.google.android.gms.**
-dontwarn com.google.android.gms.**
-dontwarn com.squareup.picasso.**
-keep class com.google.android.gms.ads.identifier.AdvertisingIdClient{
     public *;
}
-keep class com.google.android.gms.ads.identifier.AdvertisingIdClient$Info{
     public *;
}
# skip the Picasso library classes
-keep class com.squareup.picasso.** {*;}
-dontwarn com.squareup.picasso.**
-dontwarn com.squareup.okhttp.**
# skip Moat classes
-keep class com.moat.** {*;}
-dontwarn com.moat.**
# skip AVID classes
-keep class com.integralads.avid.library.* {*;}

谢谢！

Answer 1

我开发了 Android aar 库，我们的客户在尝试将 proguard 应用到他的带有连接库的应用时遇到了同样的问题。在我们的案例中，问题与 AppCompat 库无关。
我们的客户有 compileSdkVersion 和 targetSdkVersion (23)，比我们的库 (25) 还低。我们在库代码中使用的 Activity.isInMultiWindowMode() 方法在 Android API 23 中不存在，这是 Proguard 生成警告的原因。因此，我在库的 .pro 文件中添加了以下行：

-dontwarn android.app.Activity

@AlexVPerl 做了同样的事情，但我认为，当客户端应用程序的 compileSdkVersion 低于库中（至少几个单位）时，库作者有责任为这种情况准备库。