org.apache.http.client-4.3.6：java.lang.NoClassDefFoundError：org.apache.http.impl.conn.PoolingHttpClientConnectionManager

Question

I am working in Android. I am trying to install dependencies (without maven) for the Unirest library . I have added the exact versions of the dependencies, namely: httpclient 4.3.6, httpmime 4.3.6, httpasyncclient 4.0.2.

However, i am still getting this error:

E/AndroidRuntime: FATAL EXCEPTION: main
                                               Process: com.abdulwasae.odnvt_1, PID: 12678
                                               java.lang.NoClassDefFoundError: org.apache.http.impl.conn.PoolingHttpClientConnectionManager
                                                   at com.mashape.unirest.http.options.Options.refresh(Options.java:72)
                                                   at com.mashape.unirest.http.options.Options.<clinit>(Options.java:46)
                                                   at com.mashape.unirest.http.HttpClientHelper.prepareRequest(HttpClientHelper.java:151)
                                                   at com.mashape.unirest.http.HttpClientHelper.request(HttpClientHelper.java:131)
                                                   at com.mashape.unirest.request.BaseRequest.asJson(BaseRequest.java:68)
                                                   at com.abdulwasae.odnvt_1.ODFragment$2.onClick(ODFragment.java:225)
                                                   at android.view.View.performClick(View.java:4856)
                                                   at android.view.View$PerformClick.run(View.java:19956)
                                                   at android.os.Handler.handleCallback(Handler.java:739)
                                                   at android.os.Handler.dispatchMessage(Handler.java:95)
                                                   at android.os.Looper.loop(Looper.java:211)
                                                   at android.app.ActivityThread.main(ActivityThread.java:5373)
                                                   at java.lang.reflect.Method.invoke(Native Method)
                                                   at java.lang.reflect.Method.invoke(Method.java:372)
                                                   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1020)
                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:815)

According to the relevant Apache Javadocs , this definition was present in the org.apache.httpclient in the version as early as 4.3.

I am stumped. Any help would be appreciated.

Also, here is my gradle snapshot in case it helps:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 22
    buildToolsVersion "22.0.1"

    defaultConfig {
        applicationId "com.abdulwasae.odnvt_1"
        minSdkVersion 21
        targetSdkVersion 22
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

    packagingOptions {
        exclude 'META-INF/NOTICE' // will not include NOTICE file
        exclude 'META-INF/LICENSE' // will not include LICENSE file
        exclude 'META-INF/DEPENDENCIES' // will not include DEPENDENCIES file
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:22.2.1'
    compile 'com.android.support:design:22.2.1'
    compile files('libs/unirest-java-1.4.7.jar')
    compile files('libs/httpasyncclient-4.0.2.jar')
    compile files('libs/httpclient-4.3.6.jar')
    compile files('libs/httpmime-4.3.6.jar')
}

UPDATE I checked to confirm if the troubling class could be found in any one of the added dependencies. And, yes, it does show in httpclient-4.3.6.jar

I wonder what to check next.

Answer 1

Use unirest-java-1.4.9-SNAPSHOT-withDependency-ShadedForAndroid . It can be built by following this tutorial.

Answer 2

NoClassDefFoundError always means you are missing a jar file.

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

Looks like its in httpcomponent-client, try adding:

 compile 'org.apache.httpcomponents:httpcomponents-client:4.5.2'

to your build file.