【我的Android進階之旅】修復錯誤：Use of generics not allowed for java type at 'com.fasterxml.jackson.databind’
阿新 • • 發佈：2018-12-29
一、問題描述
剛把app專案的compileSdkVer 改為 28，buildToolsVer改為"28.0.3"之後，編譯失敗了，失敗錯誤如下所示：
Warning: Exception while processing task java.io.IOException: proguard.ParseException: Use of generics not allowed for java type at 'com.fasterxml.jackson.databind.introspect.VisibilityChecker$Std.<clinit>' 好吧，提示我proguard-third-party.pro 檔案中 51行，關於jackson的混淆出問題了。
Caused by: java.io.IOException: proguard.ParseException: Use of generics not
allowed for java type at
'com.fasterxml.jackson.databind.introspect.VisibilityChecker$Std.<clinit>' in line
51 of file '/data/jenkins/workspace/AP_DevelopGlobal/watch/proguard-third-party.pro'
關於proguard-third-party.pro 檔案在
一文中已經有介紹，這個proguard-third-party.pro 檔案是通用的第三方AAR庫的混淆配置
之前的配置是
# >>>>>>>>>>>>>>>>>>>>>>>> Jackson Start >>>>>>>>>>>>>>>>>>>>>>>>
-dontwarn com.fasterxml.jackson.databind.**
-keep class com.fasterxml.jackson.core.** {*;}
-keep interface com.fasterxml.jackson.core { *; }
-keep public class * extends com.fasterxml.jackson.core.**
-keep class com.fasterxml.jackson.databind.introspect.VisibilityChecker$Std.<clinit>
-keep class com.fasterxml.jackson.databind.ObjectMapper.<clinit>
-keep class com.fasterxml.jackson.databind.** {*;}
-keep class com.fasterxml.jackson.databind.introspect.VisibilityChecker$*{*;}
-keep interface com.fasterxml.jackson.databind { *; }
-keep public class * extends com.fasterxml.jackson.databind.**
# >>>>>>>>>>>>>>>>>>>>>>>> Jackson End >>>>>>>>>>>>>>>>>>>>>>>>
好吧，找到了地方，現在懷疑是不是 混淆配置需要升級了？
二、解決問題
2.1 找到jackson的官網關於混淆的說明
先找到jackson的官網，關於jackson的混淆配置的說明
好吧，看起來這些配置和我的混淆配置有點不一樣。我們試著更新一下混淆配置。
2.2 更新jackson的混淆配置
將官網上的混淆配置都更新下來，註釋掉之前的混淆配置，如下所示：
# >>>>>>>>>>>>>>>>>>>>>>>> Jackson Start >>>>>>>>>>>>>>>>>>>>>>>>
#-dontwarn com.fasterxml.jackson.databind.**
#-keep class com.fasterxml.jackson.core.** {*;}
#-keep interface com.fasterxml.jackson.core { *; }
#-keep public class * extends com.fasterxml.jackson.core.**
#-keep class com.fasterxml.jackson.databind.introspect.VisibilityChecker$Std.<clinit>
#-keep class com.fasterxml.jackson.databind.ObjectMapper.<clinit>
#-keep class com.fasterxml.jackson.databind.** {*;}
#-keep class com.fasterxml.jackson.databind.introspect.VisibilityChecker$*{*;}
#-keep interface com.fasterxml.jackson.databind { *; }
#-keep public class * extends com.fasterxml.jackson.databind.**
# https://github.com/FasterXML/jackson-docs/wiki/JacksonOnAndroid
# 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
# 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.**
# Proguard configuration for Jackson 2.x
-dontwarn com.fasterxml.jackson.databind.**
-keepclassmembers class * {
@com.fasterxml.jackson.annotation.* *;
}
# Proguard configuration for Jackson 2.x
-dontwarn com.fasterxml.jackson.databind.**
-keepclassmembers class * {
@com.fasterxml.jackson.annotation.* *;
}
# >>>>>>>>>>>>>>>>>>>>>>>> Jackson End >>>>>>>>>>>>>>>>>>>>>>>>
2.3 更新完後，提交程式碼，重新編譯。
更新完混淆配置之後，重新編譯不再報這個錯誤，編譯成功了！。
作者：歐陽鵬 歡迎轉載，與人分享是進步的源泉！
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