How to resolve java.lang.NoClassDefFoundError in android? -

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i included import.io jar android project, tried run example , got following: 

fatal exception: main     java.lang.noclassdeffounderror: com.importio.api.clientlite.json.jacksonjsonimplementation$1             @ com.importio.api.clientlite.json.jacksonjsonimplementation.<init>(jacksonjsonimplementation.java:17)             @ com.importio.api.clientlite.importio.connect(importio.java:235)             @ com.gomel.data.importiotest.showandgetdata(importiotest.java:33)             @ com.gomel.activities.detailedarticleactivity$1.onclick(detailedarticleactivity.java:40)             @ android.view.view.performclick(view.java:4247)             @ android.view.view$performclick.run(view.java:17733)             @ android.os.handler.handlecallback(handler.java:730)             @ android.os.handler.dispatchmessage(handler.java:92)             @ android.os.looper.loop(looper.java:137)             @ android.app.activitythread.main(activitythread.java:5289)             @ java.lang.reflect.method.invokenative(native method)             @ java.lang.reflect.method.invoke(method.java:525)             @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:739)             @ com.android.internal.os.zygoteinit.main(zygoteinit.java:555)             @ dalvik.system.nativestart.main(native method)

i did google , decided wrong jackson library, had added it, nothing changed. there lot of different solutions error here, cant resolve in case. give me advice, please?

i use android studio android sdk tools v22.3 have tried run project in eclipse (with jar obviously) , got same error.

upd

my build.gradle

apply plugin: 'android'  android {     compilesdkversion 18     buildtoolsversion '19.0.1'      defaultconfig {         minsdkversion 14         targetsdkversion 18         versioncode 1         versionname "1.0"     }     buildtypes {         release {             runproguard false             proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-rules.txt'         }     } }  dependencies {     compile 'com.android.support:support-v4:18.0.0'     compile files('lib/com.importio.api.clientlite-1.0.2.jar')     compile files('lib/jackson-core-asl-1.9.12.jar') }

enter image description here

i added file dependencies, think right option. there no compile error while don't use methods. , of course jars in lib folder.

required jar jackson-core-asl-1.9.12.jar missing have download jar , set classpath.


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