android - java.lang.NoClassDefFoundError: org.apache.http.impl.conn.PoolingHttpClientConnectionManager -

i have create 1 demo based on mashape api call.but error.i tried lots of suggestion.but not solution.

java code:

public class mainactivity extends actionbaractivity {      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);         new callmashapeasync().execute();       }      private class callmashapeasync extends asynctask<string, integer, httpresponse<jsonnode>> {          protected httpresponse<jsonnode> doinbackground(string... msg) {              httpresponse<jsonnode> request = null;             try {                 request = unirest.get("https://indianpost.p.mashape.com/getoffices.php?pincode=394101")                         .header("x-mashape-key", "my api")                         .header("accept", "application/json")                         .asjson();             } catch (unirestexception e) {                 // todo auto-generated catch block                 e.printstacktrace();             }              return request;         }          protected void onprogressupdate(integer...integers) {         }          protected void onpostexecute(httpresponse<jsonnode> response) {             string answer = response.getbody().tostring();             textview txtview = (textview) findviewbyid(r.id.textview1);             txtview.settext(answer);         }     } } 

build.gradle

apply plugin: 'com.android.application'  android {     compilesdkversion 21     buildtoolsversion "22.0.1"      defaultconfig {         applicationid "com.example.hungama3.myapplication"         minsdkversion 16         targetsdkversion 21         versioncode 1         versionname "1.0"     }     buildtypes {         release {             minifyenabled false             proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-rules.pro'         }     } }  dependencies {     compile filetree(dir: 'libs', include: ['*.jar'])     compile 'com.android.support:appcompat-v7:22.0.0'     compile files('libs/gson-2.2.4.jar')     compile files('libs/httpclient-4.3-beta1.jar')     compile files('libs/mashape-java-client-2.0.10.jar')     compile files('libs/unirest-java-1.3.0.jar')     compile files('libs/org.apache.commons.logging-1.1.1.jar') } 

error:

java.lang.runtimeexception: error occured while executing doinbackground()             @ android.os.asynctask$3.done(asynctask.java:300)             @ java.util.concurrent.futuretask.finishcompletion(futuretask.java:355)             @ java.util.concurrent.futuretask.setexception(futuretask.java:222)             @ java.util.concurrent.futuretask.run(futuretask.java:242)             @ android.os.asynctask$serialexecutor$1.run(asynctask.java:231)             @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1112)             @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:587)             @ java.lang.thread.run(thread.java:841)      caused by: java.lang.noclassdeffounderror: org.apache.http.impl.conn.poolinghttpclientconnectionmanager             @ org.apache.http.impl.client.httpclientbuilder.build(httpclientbuilder.java:459)             @ com.mashape.unirest.http.options.options.refresh(options.java:41)             @ com.mashape.unirest.http.options.options.<clinit>(options.java:27)             @ com.mashape.unirest.http.httpclienthelper.preparerequest(httpclienthelper.java:138)             @ com.mashape.unirest.http.httpclienthelper.request(httpclienthelper.java:121)             @ com.mashape.unirest.request.baserequest.asjson(baserequest.java:64)             @ com.example.hungama3.myapplication.mainactivity$callmashapeasync.doinbackground(mainactivity.java:33)             @ com.example.hungama3.myapplication.mainactivity$callmashapeasync.doinbackground(mainactivity.java:27)             @ android.os.asynctask$2.call(asynctask.java:288)             @ java.util.concurrent.futuretask.run(futuretask.java:237)             at android.os.asynctask$serialexecutor$1.run(asynctask.java:231)             at java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1112)             at java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:587)             at java.lang.thread.run(thread.java:841) 

i tried lots of jar file http apache library not getting solution. if 1 have suggestion tell me.

error focus line 37 indicate "request" in try catch.

edit again:

after second thought, android's library contains httpclient (pre android 6.0), including yourself, creating conflict. try remove jar , try.

remove line

compile files('libs/httpclient-4.3-beta1.jar') 

you may need remove well

compile files('libs/org.apache.commons.logging-1.1.1.jar')