首页 > 代码库 > Android混淆编译时,用到gson-2.2.2.jar进行反射解析json数据时,报ClassCastException错误
Android混淆编译时,用到gson-2.2.2.jar进行反射解析json数据时,报ClassCastException错误
在我的代码中,我使用方法是:
public synchronized <T> T parseJson(String json, Class<T> classOfT) throws Exception{ T target = null; Gson gson = new Gson(); target = gson.fromJson(json, classOfT); return target; }
之后在我的Activity中使用方式是:
String addModel = JsonParse.getJsonParse().parseJson(jsonString, AddModel.class);
//其中AddModel是自己写的一个model类
//jsonString是一个本地文件,以Json格式存在
之后一般编译没问题,但是混淆编译就会报错:
shortMsg:java.lang.ClassCastException
longMsg:java.lang.ClassCastException: com.google.gson.internal.StringMap
stackTrace:java.lang.ClassCastException: com.google.gson.internal.StringMap
at com.android.xxxx.activity.Info.c(Unknown Source)
at com.android.xxxx.activity.Info.onClick(Unknown Source)
at android.view.View.performClick(View.java:2486)
at android.view.View$PerformClick.run(View.java:9130)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3703)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:624)
at dalvik.system.NativeStart.main(Native Method)
longMsg:java.lang.ClassCastException: com.google.gson.internal.StringMap
stackTrace:java.lang.ClassCastException: com.google.gson.internal.StringMap
at com.android.xxxx.activity.Info.c(Unknown Source)
at com.android.xxxx.activity.Info.onClick(Unknown Source)
at android.view.View.performClick(View.java:2486)
at android.view.View$PerformClick.run(View.java:9130)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3703)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:624)
at dalvik.system.NativeStart.main(Native Method)
这是由于用到Gson的反射解析json字符串,混淆后导致Model的成员变量改变而导致成员变量名不能和json字符串对应而造成的
解决方法:
在proguard.cfg文件中
首先声明不要混淆对应的Model类
如,我用到的叫AddModel:
-keep public class com.android.chebaob.model.AddModel{ *;}
而且要在proguard.cfg文件最后添加:
##---------------Begin: proguard configuration for 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-keep class sun.misc.Unsafe { *; }#-keep class com.google.gson.stream.** { *; }# Application classes that will be serialized/deserialized over Gson-keep class com.google.gson.examples.android.model.** { *; }##---------------End: proguard configuration for Gson ----------
这样就能解决问题了
声明:以上内容来自用户投稿及互联网公开渠道收集整理发布,本网站不拥有所有权,未作人工编辑处理,也不承担相关法律责任,若内容有误或涉及侵权可进行投诉: 投诉/举报 工作人员会在5个工作日内联系你,一经查实,本站将立刻删除涉嫌侵权内容。