混淆错（一）

场景

项目用gson框架。配并开混淆后，release版运行某处失败。

日志

2019-11-02 11:29:43.242 4900-4900/? E/AndroidRuntime: FATAL EXCEPTION: main Process: com.lalala.lalala, PID: 4900 java.lang.NullPointerException: throw with null exception at module.login.bean.UserBean$a.a(Unknown Source:3) at module.login.LoginActivity.a(SourceFile:25) at j.c.a.a(Unknown Source:8) at d.g.a.y.i.c(SourceFile:2) at d.g.a.y.i.b(SourceFile:10) at d.g.a.y.i.a(SourceFile:13) at d.g.b.o$a.run(SourceFile:6) at d.g.a.e$l.run(SourceFile:6) at android.os.Handler.handleCallback(Handler.java:891) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:207) at android.app.ActivityThread.main(ActivityThread.java:7539) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:958)

分析

混淆后映射错。

解决

接口

package base; import androidx.annotation.Keep; /** * Created on 2019/11/2. * * @author 郑少鹏 * @desc BaseGsonBean */ @Keep public interface BaseGsonBean { }

实体类

package module.login.bean; import base.BaseGsonBean; /** * Created on 2019/4/24. * * @author 郑少鹏 * @desc 用户 */ public class UserBean implements BaseGsonBean { /** * data : {"userId":4, * "number":null, * "mobile":"13673541527", * "token":"ey", * "gender":"male", * "name":"哈哈", * "birthDay":"2019-05-05", * "pharmacy":"西安北关正街店"} * meta : {"code":2000,"message":"登录成功"} */ private DataBean data; private MetaBean meta; public DataBean getData() { return data; } public void setData(DataBean data) { this.data = data; } public MetaBean getMeta() { return meta; } public void setMeta(MetaBean meta) { this.meta = meta; } public static class DataBean implements BaseGsonBean { /** * userId : 4 * number : null * mobile : 13673541527 * token : ey * gender : male * name : 哈哈 * birthDay : 2019-05-05 * pharmacy : 西安北关正街店 */ private int userId; private String number; private String mobile; private String token; private String gender; private String name; private String birthDay; private String pharmacy; public int getUserId() { return userId; } public String getNumber() { return number; } public String getMobile() { return mobile; } public String getToken() { return token; } public String getGender() { return gender; } public String getName() { return name; } public String getBirthDay() { return birthDay; } public String getPharmacy() { return pharmacy; } } public static class MetaBean implements BaseGsonBean { /** * code : 2000 * message : 登录成功 */ private int code; private String message; public int getCode() { return code; } public void setCode(int code) { this.code = code; } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } } }

proguard-rules.pro

#【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 # For using GSON @Expose annotation -keepattributes *Annotation* # Gson specific classes -dontwarn sun.misc.** #-keep class com.google.gson.stream.** { *; } # Application classes that will be serialized/deserialized over Gson #-keep class com.google.gson.examples.android.model.** { <fields>; } # 谷歌示例（如下替换） -keep class * implements base.BaseGsonBean {*;} # Prevent proguard from stripping interface information from TypeAdapter, TypeAdapterFactory, # JsonSerializer, JsonDeserializer instances (so they can be used in @JsonAdapter) -keep class * implements com.google.gson.TypeAdapter -keep class * implements com.google.gson.TypeAdapterFactory -keep class * implements com.google.gson.JsonSerializer -keep class * implements com.google.gson.JsonDeserializer # Prevent R8 from leaving Data object members always null -keepclassmembers,allowobfuscation class * { @com.google.gson.annotations.SerializedName <fields>; }