NoClassDefFondError in Android... but the Class is in one jar included in the Classpath
android, noclassdeffounderror
Solution
you need create a folder named `libs` in your project, and copy you referenced jars to this folder.
Problem
I am developing an App in Android. It has to be able of take a photo, and to send that photo to a webpage. This is the code: ``` HttpClient httpclient = new DefaultHttpClient(); HttpPost httpPost = new HttpPost("someurl"); MultipartEntity multipartEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE); //Here throws the exception multipartEntity.addPart("data", new InputStreamBody( new ByteArrayInputStream(byteArray), "image/png")); multipartEntity.addPart("caption", new StringBody(filename)); httpPost.setEntity((HttpEntity) multipartEntity); ``` I have the libraries needed in my ClassPath (httpclient, apache-mime4j-core, httpcore and httpmime). It doesn't shows any error in compilation time. but, when i run the project, it says " java.lang.NoClassDefFoundError: org.apache.http.entity.mime.MultipartEntity" but that class DOES exists in the jars (in httpMime, exactly). Here is the full trace: ``` 04-09 10:21:59.362: E/AndroidRuntime(10352): FATAL EXCEPTION: main 04-09 10:21:59.362: E/AndroidRuntime(10352): java.lang.NoClassDefFoundError: org.apache.http.entity.mime.MultipartEntity 04-09 10:21:59.362: E/AndroidRuntime(10352): at com.publidirecta.AppAzafata.IniciarGPSActivity2.enviarImagen(IniciarGPSActivity2.java:206) 04-09 10:21:59.362: E/AndroidRuntime(10352): at com.publidirecta.AppAzafata.IniciarGPSActivity2.onActivityResult(IniciarGPSActivity2.java:196) 04-09 10:21:59.362: E/AndroidRuntime(10352): at android.app.Activity.dispatchActivityResult(Activity.java:3908) 04-09 10:21:59.362: E/AndroidRuntime(10352): at android.app.ActivityThread.deliverResults(ActivityThread.java:2549) 04-09 10:21:59.362: E/AndroidRuntime(10352): at android.app.ActivityThread.handleSendResult(ActivityThread.java:2595) 04-09 10:21:59.362: E/AndroidRuntime(10352): at android.app.ActivityThread.access$2000(ActivityThread.java:121) 04-09 10:21:59.362: E/AndroidRuntime(10352): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:973) 04-09 10:21:59.362: E/AndroidRuntime(10352): at android.os.Handler.dispatchMessage(Handler.java:99) 04-09 10:21:59.362: E/AndroidRuntime(10352): at android.os.Looper.loop(Looper.java:130) 04-09 10:21:59.362: E/AndroidRuntime(10352): at android.app.ActivityThread.main(ActivityThread.java:3701) 04-09 10:21:59.362: E/AndroidRuntime(10352): at java.lang.reflect.Method.invokeNative(Native Method) 04-09 10:21:59.362: E/AndroidRuntime(10352): at java.lang.reflect.Method.invoke(Method.java:507) 04-09 10:21:59.362: E/AndroidRuntime(10352): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866) 04-09 10:21:59.362: E/AndroidRuntime(10352): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:624) 04-09 10:21:59.362: E/AndroidRuntime(10352): at dalvik.system.NativeStart.main(Native Method) ``` I've tried with older versions of all the jars used in this task, but it still doesn't works. That jars do appear in the "referenced Libraries" in the Android project. I've tried everything. Anybody has any idea why this happens? im about to throw myself for the window. Thank you in advance!