I have a problem with generating signed APK in Android Studio. It was working fine few days ago, I dont know what went wrong. I'm getting this error for any project I try to fgenerate signed APK of:
Warning:Exception while processing task java.io.IOException: Can't write [/Users/bhaveshmisri/Downloads/littleone-dagger-mvp/app/build/intermediates/transforms/proguard/release/jars/3/1f/main.jar] (Can't read [/Users/bhaveshmisri/Downloads/littleone-dagger-mvp/app/build/intermediates/transforms/RealmTransformer/release/folders/1/1/realm(;;;;;;**.class)] (Can't read [com] (Can't read [crashlytics] (Can't read [android] (Can't read [answers] (Can't read [shim] (Can't read [R.class] (Duplicate zip entry [com/crashlytics/android/answers/shim/R.class]))))))))
Here is my buildTypes Task:
buildTypes {
debug {
shrinkResources false // This must be first
minifyEnabled false // This must be after shrinkResources
multiDexEnabled true
proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules-debug.pro"
}
release {
shrinkResources true
minifyEnabled true
useProguard true
multiDexEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), "proguard-rules.pro"
}
}
Here is the code I've written in proguard file:
-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontskipnonpubliclibraryclassmembers
-dontpreverify
-verbose
-dump class_files.txt
-printseeds seeds.txt
-printusage unused.txt
-printmapping mapping.txt
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
-allowaccessmodification
-keepattributes *Annotation*
-renamesourcefileattribute SourceFile
-keepattributes SourceFile,LineNumberTable
-keepattributes Signature
-keepattributes Exceptions
-repackageclasses ''
-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 * extends android.app.
-keep public class com.android.vending.licensing.ILicensingService
-keep class com.google.common.collect.MapMakerInternalMap$ReferenceEntry
-keep class com.google.common.cache.LocalCache$ReferenceEntry
-dontnote com.android.vending.licensing.ILicensingService
-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();
}
-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 class **.R$* {
public static <fields>;
}
-keepclassmembers enum * {
public static **[] values();
public static ** valueOf(java.lang.String);
}
-keep public class * {
public protected *;
}
-keep class * implements android.os.Parcelable {
public static final android.os.Parcelable$Creator *;
}
-dontwarn android.support.v7.**
-keep class android.support.v7.** { *; }
-keep interface android.support.v7.* { *; }
-keepattributes *Annotation,Signature
-dontwarn in.mylo.pregnancy.baby.app.**
-keep class in.mylo.pregnancy.baby.app.shapeimageview.**{ *; }
-keep class android.support.v4.app.** { *; }
-keep interface android.support.v4.app.** { *; }
-keep interface com.actionbarsherlock.** { *; }
-keep class butterknife.*
-keepclasseswithmembernames class * {
@butterknife.* <methods>; }
-keepclasseswithmembernames class * {
@butterknife.* <fields>; }
-dontwarn javax.annotation.**
-dontwarn javax.inject.**
-dontwarn sun.misc.Unsafe
-dontwarn java.lang.ClassValue
-dontwarn com.google.j2objc.annotations.Weak
-dontwarn org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
-keep public class * implements com.bumptech.glide.module.GlideModule
-keep public enum com.bumptech.glide.load.resource.bitmap.ImageHeaderParser$** {
**[] $VALUES;
public *;
}
-dontwarn com.firebase.**
-dontnote com.firebase.client.core.GaePlatform
-keep class com.firebase.** { *; }
-keepnames class com.fasterxml.jackson.** { *; }
-keepnames class javax.servlet.** { *; }
-keepnames class org.ietf.jgss.** { *; }
-dontwarn com.clevertap.android.sdk.**
-keep class okhttp3.** { *; }
-keep interface okhttp3.** { *; }
-dontwarn okhttp3.**
-dontnote okhttp3.**
-keep class sun.misc.Unsafe { *; }
-dontwarn java.nio.file.*
-dontwarn org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
-keepclassmembers class * extends android.app.Activity {
public void *(android.view.View);
}
-keepclassmembers enum * {
public static **[] values();
public static ** valueOf(java.lang.String);
}
-keepclassmembers class * implements android.os.Parcelable {
public static final android.os.Parcelable$Creator CREATOR;
}
-keepclassmembers class **.R$* {
public static <fields>;
}
-dontwarn android.support.**
-dontwarn com.google.android.gms.**
-dontwarn com.fasterxml.**
-dontwarn okio.**
-dontwarn com.caverock.**
-dontwarn com.github.siyamed.shapeimageview.**
-dontwarn retrofit.**
-keep class retrofit.** { *; }
-dontwarn sun.misc.Unsafe
-dontwarn com.octo.android.robospice.retrofit.RetrofitJackson**
-dontwarn retrofit.appengine.UrlFetchClient
-keepattributes Signature
-keepattributes Exceptions
-keepclasseswithmembers class * {
@retrofit.http.* <methods>;
}
-keep class com.google.gson.** { *; }
-keep class com.google.inject.** { *; }
-keep class org.apache.http.** { *; }
-keep class org.apache.james.mime4j.** { *; }
-keep class javax.inject.** { *; }
-keep class retrofit.** { *; }
-keep class retrofit2.** { *; }
-dontwarn org.apache.http.**
-dontwarn android.net.http.AndroidHttpClient
-dontwarn retrofit.**
-dontwarn retrofit2.**
-dontwarn sun.misc.**
-keepclassmembers class rx.internal.util.unsafe.*ArrayQueue*Field* {
long producerIndex;
long consumerIndex;
}
-keepclassmembers class rx.internal.util.unsafe.BaseLinkedQueueProducerNodeRef {
long producerNode;
long consumerNode;
}
-keep class in.mylo.pregnancy.baby.app.retrofit.** { *; }
-keep interface org.parceler.Parcel
-keep @org.parceler.Parcel class * { *; }
-keep class **$$Parcelable { *; }
-keepnames public class * extends io.realm.RealmObject
-keep @io.realm.annotations.RealmModule class *
-keep class io.realm.** { *; }
-dontwarn javax.**
-dontwarn io.realm.**
-keepnames public class * extends io.realm.RealmObject
-dontwarn com.google.android.gms.location.**
-dontwarn com.google.android.gms.gcm.**
-dontwarn com.google.android.gms.iid.**
-keep class com.google.android.gms.gcm.** { *; }
-keep class com.google.android.gms.iid.** { *; }
-keep class com.google.android.gms.location.** { *; }
-keep class com.moe.pushlibrary.activities.** { *; }
-keep class com.moengage.locationlibrary.GeofenceIntentService
-keep class com.moe.pushlibrary.InstallReceiver
-keep class com.moengage.push.MoEPushWorker
-keep class com.moe.pushlibrary.providers.MoEProvider
-keep class com.moengage.receiver.MoEInstanceIDListener
-keep class com.moengage.worker.MoEGCMListenerService
-keep class com.moe.pushlibrary.models.** { *;}
-keep class com.moengage.core.GeoTask
-keep class com.moengage.location.GeoManager
-keep class com.moengage.inapp.InAppManager
-keep class com.moengage.push.PushManager
-keep class com.moengage.inapp.InAppController
-dontwarn com.moengage.location.GeoManager
-dontwarn com.moengage.core.GeoTask
-dontwarn com.moengage.receiver.*
-dontwarn com.moengage.worker.*
-dontwarn com.moengage.inapp.ViewEngine
-keep class com.delight.** { *; }
-dontwarn com.google.android.gms.location.**
-keep class com.moe.** { *; }
-keep class com.moengage.** { *; }
-keep class com.delight.** { *; }
-keep class com.google.android.gms.ads.** { *; }
-keep class com.facebook.** {
*;
}
-dontwarn android.databinding.**
-keep class android.databinding.** { *; }
Any help appreciated, thanks in advance.
Did you tried to disbale proguard for release build?
release {
shrinkResources false
minifyEnabled false
useProguard false
multiDexEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), "proguard-rules.pro"
}
if this works, you should fix our proguard config
Try excluding answers-shim:
compile ('io.branch.sdk.android:library:2.+') {
exclude module: 'answers-shim'
}
Try to add below line in your proguard file to ignore warning that you are getting as above.
-dontwarn com.crashlytics.android.answers.shim.**
The problem was in answers library. There seems to be a problem in the latest version. When i downgrade the library to
compile('io.branch.sdk.android:library:2.5.9') {
exclude module: 'answers-shim'
}
it works fine.
Problem
The same problem occurred to me after I :
- Upgraded to Android Studio 3, then
- in my dependency library, changed inline classes to lambdas and method references.
I thought I could freely utilize lambdas and method references as stated in Android Studio 3 release notes, I may have forgot or missed it.
Solution:
Anyway, I'm not 100% sure, but I think we still can't use lambdas and/or method references in project libraries, because as soon as I reverted all lambdas and method references in my library, I successfully re-generated my APK.
来源：https://stackoverflow.com/questions/43094195/cant-generate-signed-apk-in-android-studio-java-io-ioexception