Gson NoClassDefFoundError after ADT and SDK Tools update to v17?

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Today I updated my ADT and SDK Tools to v17 and my projects using Google's gson jar library started to throw NoClassDefFoundError. Here's the logcat output: 03-22 12:30:58.941: E/AndroidRuntime(21672): FATAL EXCEPTION: main 03-22 12:30:58.941: E/AndroidRuntime(21672): java.lang. NoClassDefFoundError: com.google.gson.

Gson 03-22 12:30:58.941: E/AndroidRuntime(21672): at com.matriksdata.conn.XRequestHandler. Connect(XRequestHandler. Java:35) 03-22 12:30:58.941: E/AndroidRuntime(21672): at com.matriksdata.conn.XRequestHandler.

MakeRequest(XRequestHandler. Java: 29) 03-22 12:30:58.941: E/AndroidRuntime(21672): at com.matriksdata.bavul. XBaseWithConnectionActivity.

MakeRequest(XBaseWithConnectionActivity. Java: 46) 03-22 12:30:58.941: E/AndroidRuntime(21672): at com.matriksdata.ui.login. SplashScreenActivity.

OnCreate(SplashScreenActivity. Java: 36) 03-22 12:30:58.941: E/AndroidRuntime(21672): at android.app.Activity. PerformCreate(Activity.

Java:4465) 03-22 12:30:58.941: E/AndroidRuntime(21672): at android.app.Instrumentation. CallActivityOnCreate(Instrumentation. Java: 1049) 03-22 12:30:58.941: E/AndroidRuntime(21672): at android.app.ActivityThread.

PerformLaunchActivity(ActivityThread. Java: 1919) 03-22 12:30:58.941: E/AndroidRuntime(21672): at android.app.ActivityThread. HandleLaunchActivity(ActivityThread.

Java: 1980) 03-22 12:30:58.941: E/AndroidRuntime(21672): at android.app.ActivityThread. Access$600(ActivityThread. Java:122) 03-22 12:30:58.941: E/AndroidRuntime(21672): at android.app.

ActivityThread$H. HandleMessage(ActivityThread. Java:1146) 03-22 12:30:58.941: E/AndroidRuntime(21672): at android.os.Handler.

DispatchMessage(Handler. Java:99) 03-22 12:30:58.941: E/AndroidRuntime(21672): at android.os.Looper. Loop(Looper.

Java:137) 03-22 12:30:58.941: E/AndroidRuntime(21672): at android.app.ActivityThread. Main(ActivityThread. Java:4340) 03-22 12:30:58.941: E/AndroidRuntime(21672): at java.lang.reflect.Method.

InvokeNative(Native Method) 03-22 12:30:58.941: E/AndroidRuntime(21672): at java.lang.reflect.Method. Invoke(Method. Java:511) 03-22 12:30:58.941: E/AndroidRuntime(21672): at com.android.internal.os.

ZygoteInit $MethodAndArgsCaller. Run(ZygoteInit. Java:784) 03-22 12:30:58.941: E/AndroidRuntime(21672): at com.android.internal.os.ZygoteInit.

Main(ZygoteInit. Java:551) 03-22 12:30:58.941: E/AndroidRuntime(21672): at dalvik.system.NativeStart. Main(Native Method) any ideas?

Android gson adt noclassdeffounderror link|improve this question asked 03-22 at 10:43Yasin YILDIRIM1728 100% accept rate.

I faced a similar problem today. This fixed it for me: Remove all Android Library projects and external jars from the build path. Create a folder named 'libs' in your project.

Place all external . Jars in that folder, the ADT should now place them under 'Android Dependencies'. Re-import all your previous Android Library projects the normal way.

The issue is that external jars are not placed in the 'libs' folder by default when using Properties - Java Build Path- Add External Jar, instead they are placed under 'Referenced Libraries' instead of 'Android Dependencies' and this causes the NoClassDefFoundError. Please, check Dealing with dependencies in Android projects for more details.

For SDK Tools 17 you need to rename your library project's folder from "lib" to "libs" as suggested here. Also have a look at this.

I created a quick post in my blog explaining how to fix those problems. It has to do with libraries and a change they made on how Eclipse manages libraries now. You can check it here if you want: xrigau.wordpress.com/2012/03/22/fix-some....

This is an official link provided by Android Devs at Google. Go through the article if you are facing NoClassDefFoundException after updating the plugin and/or SDK plus.google.com/115995639636688350464/po....

This site has the simplest solution which worked for me, select the library's checkbox under "Order and Export". android.foxykeep.com/dev/how-to-fix-the-....

Check your gson library in build path. Maybe gson libraty aren't not accesible.

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