JNI 防混淆 Android proguard

先写最终解决办法

-keep class com.test.DocDetect {
    *;
}

com.test.DocDetct 换成你的JNI类

异常

java.lang.UnsatisfiedLinkError: JNI_ERR returned from JNI_OnLoad

• APK的release包崩溃，debug包正常
• JNI内反射加载类找不到导致
• 反编译APK（或者看mapping文件），发现
  DetectResult类，被rename 成 a.b.c，包名都变了

方法

添加JNI相关类的防混淆

解决尝试

1. keep class

防止类被移走、重命名

-keep class com.test.DetectResult
-keep class com.test.DocDetect

• private的属性 被混淆
• 继承自接口的方法被混淆 （接口没防混淆）

2. keepclassmembers

只防止类的成员 被移走、重命名

-keepclassmembers class com.test.DetectResult {
    *;
}
-keepclassmembers class com.test.DocDetect {
    *;
}

• com.sogou.image.document.DetectResult 被混淆

3. 最终解决

#Doc Detect SDK
-keep class com.test.DetectResult {
    *;
}
-keep class com.test.DocDetect {
    *;
}

文档总结

# Add *one* of the following rules to your Proguard configuration file.
# Alternatively, you can annotate classes and class members with @androidx.annotation.Keep

# keep the class and specified members from being removed or renamed
-keep class com.sogou.image.document.DocDetect { *; }

# keep the specified class members from being removed or renamed 
# only if the class is preserved
-keepclassmembers class com.sogou.image.document.DocDetect { *; }

# keep the class and specified members from being renamed only
-keepnames class com.sogou.image.document.DocDetect { *; }

# keep the specified class members from being renamed only
-keepclassmembernames class com.sogou.image.document.DocDetect { *; }