使用方法引用进行混淆后，会出现 NoSuchMethodError 崩溃

编译&proguard之前的源代码：

public class IntentSession extends BaseIntentSession {
    @Override
    public void onResume() {
        super.onResume();
        mExecutor.exec(getIntent(), this::finish);
    }
}

编译 proguard 后的反编译代码：（使用 CFR 0_118 反编译）

public class a extends superA {

    public void e() {
        super.e();
        this.c.a(this.j(), b.a((a)this)); // the problematic code here
    }
}

现在是compile&proguard之后的关键代码，b类的反编译代码：

final class b implements c.a {
    private a a;

    b (a a1) {
        this.a = a1;
    }

    static /* synthetic */ b a(final a a) {
        return new b(a);
    }

    @LambdaForm.Hidden
    public void a() {
        this.a.finish();
    }
}

它仍然引用了finish()方法已经被混淆为m()由混淆者。

我希望引用 finish() 方法被混淆为 m()，但这不是正在发生的事情，这就是我的问题。

Proguard 没有警告我，它只会崩溃NoSuchMethodError在运行时一旦遇到错误的代码。所以不要告诉我添加一个混淆器配置，例如-不警告java.lang.invoke.*我尝试过但没有成功。

也许混淆时涉及的类的处理顺序是错误的，谁知道呢？

我不想添加@Keepfinish() 方法上的注释，这是一个糟糕的解决方案，我必须担心它并在将来小心使用方法引用，所以我正在寻找最好的解决方案。

以下是我的 gradle 配置：

dependencies {
    classpath 'com.android.tools.build:gradle:2.2.3'
    classpath 'me.tatarka:gradle-retrolambda:3.4.0'
    classpath "com.fernandocejas.frodo:frodo-plugin:0.8.3"
    classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
}

下面是我的proguard-rules.pro:

-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontpreverify
-verbose
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
-ignorewarnings

-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 *;
}

-dontwarn java.util.**
-keep class java.util.** {*; }

-dontwarn com.android.**
-keep class com.android.** { *; }

-dontwarn android.support.**
-keep class android.support.** { *; }

-keepattributes SourceFile, LineNumberTable

# end common config

##---------------Begin: proguard configuration for Gson  ----------
# Gson uses generic type information stored in a class file when working with fields. Proguard
# removes such information by default, so configure it to keep all of it.
-keepattributes Signature

# Gson specific classes
-keep class sun.misc.Unsafe { *; }
#-keep class com.google.gson.stream.** { *; }

-dontwarn com.google.gson.**
-keep class com.google.gson.** { *; }

-dontwarn com.baidu.util.audiocore.**
-keep class com.baidu.util.audiocore.** { *; }

# Application classes that will be serialized/deserialized over Gson
##---------------End: proguard configuration for Gson  ----------

# Explicitly preserve all serialization members. The Serializable interface
# is only a marker interface, so it wouldn't save them.
-keepclassmembers class * implements java.io.Serializable {
    static final long serialVersionUID;
    private static final java.io.ObjectStreamField[] serialPersistentFields;
    private void writeObject(java.io.ObjectOutputStream);
    private void readObject(java.io.ObjectInputStream);
    java.lang.Object writeReplace();
    java.lang.Object readResolve();
}

-keep public class * implements java.io.Serializable {*;}
# end Serializable

#  ----------------------------
-dontnote
-dontwarn com.xiaomi.push.service.XMPushService

#for speech sdk
-keep class com.orion.speech.** {*;}
-keep class com.orion.speech.audio.** {*;}
#end for speech sdk

#for xiaomi
-keep class PushReceiver {*;}
-keep class com.xiaomi.push.**{*;}
#end for xiaomi

#for retrofit
-dontwarn sun.misc.Unsafe
-dontwarn okio.**
# Platform calls Class.forName on types which do not exist on Android to determine platform.
-dontnote retrofit2.Platform
# Platform used when running on RoboVM on iOS. Will not be used at runtime.
-dontnote retrofit2.Platform$IOS$MainThreadExecutor
# Platform used when running on Java 8 VMs. Will not be used at runtime.
-dontwarn retrofit2.Platform$Java8
# Retain generic type information for use by reflection by converters and adapters.
-keepattributes Signature
# Retain declared checked exceptions for use by a Proxy instance.
-keepattributes Exceptions
#end for retrofit

#for lambda
-dontwarn java.lang.invoke.*
#end for lambda

#for okhttp
-keep class okhttp3.** { *; }
-keep interface okhttp3.** { *; }
-dontwarn okhttp3.**
#end for okhttp

#for RxJava
-keep class rx.schedulers.Schedulers {
    public static <methods>;
}
-keep class rx.schedulers.ImmediateScheduler {
    public <methods>;
}
-keep class rx.schedulers.TestScheduler {
    public <methods>;
}
-keepclassmembers class rx.internal.util.unsafe.*ArrayQueue*Field* {
   long producerIndex;
   long consumerIndex;
}

-keepclassmembers class rx.internal.util.unsafe.BaseLinkedQueueProducerNodeRef {
    rx.internal.util.atomic.LinkedQueueNode producerNode;
}

-keepclassmembers class rx.internal.util.unsafe.BaseLinkedQueueConsumerNodeRef {
    rx.internal.util.atomic.LinkedQueueNode consumerNode;
}
# end for RxJava

#for bugly
-dontwarn com.tencent.bugly.**
-keep public class com.tencent.bugly.**{*;}
#end for bugly

#----------------android

# this indicate the case of using APIs higher than minSDK (API 8)
-dontwarn android.**

# ---------------------------------------

# TODO: can be reduce if we have more understanding about Service and AIDL
-keep public class android.service.notification.** {*;}

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


-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);
}

-keepattributes *Annotation*,EnclosingMethod,Signature

-keep interface android.content.pm.**{*;}
-keep class android.content.pm.**{*;}
-keep class android.os.Process{*;}

-dontwarn com.android.internal.os.*

-keep class android.support.v4.os.**{*;}

-keepclassmembers class * {
    @android.support.v4 *;
}

# cmcm support
-keep class com.cmcm.support.jni.** { *; }

解决这些错误-keep不修复的是REAL痛苦，而我在这些问题上取得进展的唯一方法就是遵循以下策略：

1. 找出在 proguard 周期的哪个阶段引入错误（缩小、优化或混淆）
2. 添加/删除该步骤的例外情况，从最广泛的排除范围到最窄的排除范围，直到问题重新出现

E.G.

验证这是否是优化问题

1. Add -dontoptimize而不是-optimizations字符串重建和测试
2. 如果崩溃得到缓解，则向后处理最高级别的优化排除类别!method/*, !code/*, !class/*, !field/*直到您确定哪种排除可以解决问题
3. 确定该排除类别中的最小排除是什么（假设它是!method/*，从它去!method/marking/*然后如果这也有效尝试!method/marking/final。如果有效，那么您就找到了最小排除）

这很可能是Proguard 规则中的一个错误您正在使用的库之一或在您使用的 Proguard 版本中（我都看过）所以也尝试更新两者。