JacksonOnAndroid

This page contains information on various aspects of usage that are specific to Android platform

ProGuard

While there are no standardized settings for ProGuard usage, users have contributed sample settings that may be of use. We are happy to accept more suggestions.

Here are sample settings by @johnjohndoe:

# Jackson
-keep @com.fasterxml.jackson.annotation.JsonIgnoreProperties class * { *; }
-keep @com.fasterxml.jackson.annotation.JsonCreator class * { *; }
-keep @com.fasterxml.jackson.annotation.JsonValue class * { *; }
-keep class com.fasterxml.** { *; }
-keep class org.codehaus.** { *; }
-keepnames class com.fasterxml.jackson.** { *; }
-keepclassmembers public final enum com.fasterxml.jackson.annotation.JsonAutoDetect$Visibility { 
    public static final com.fasterxml.jackson.annotation.JsonAutoDetect$Visibility *;
}

# General
-keepattributes SourceFile,LineNumberTable,*Annotation*,EnclosingMethod,Signature,Exceptions,InnerClasses

and another from @CCorrado:

# Proguard configuration for Jackson 2.x
-keep class com.fasterxml.jackson.databind.ObjectMapper {
    public <methods>;
    protected <methods>;
}
-keep class com.fasterxml.jackson.databind.ObjectWriter {
    public ** writeValueAsString(**);
}
-keepnames class com.fasterxml.jackson.** { *; }
-dontwarn com.fasterxml.jackson.databind.**

Another configuration to ensure annotations are preserved:

# Proguard configuration for Jackson 2.x
-dontwarn com.fasterxml.jackson.databind.**
-keepclassmembers class * {
     @com.fasterxml.jackson.annotation.* *;
}

French article by Nicolas Mouchel with quite a selection of ProGuard settings:

• Spécifier les POJO pour ne plus les écrire, 15.07.2015

Misc other

To avoid wrong name based infered linkage between getter/setter method and field, it is recommended to disable MapperFeature.INFER_PROPERTY_MUTATORS.