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

Question

我在 Android 工作。我正在尝试为 Unirest library 安装依赖项（没有 Maven）。我已经添加了依赖项的确切版本，即：httpclient 4.3.6、httpmime 4.3.6、httpasyncclient 4.0.2。

但是，我仍然收到此错误：

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.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)

根据相关Apache Javadocs，这个定义早在4.3版本的org.apache.httpclient中就有了。

我很难过。任何帮助将不胜感激。

此外，这是我的 gradle 快照以防有帮助：

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')
}

更新 我检查以确认是否可以在任何一个添加的依赖项中找到麻烦的 class。而且，是的，它确实显示在 httpclient-4.3.6.jar

我不知道接下来要检查什么。

Answer 1

NoClassDefFoundError 总是意味着您缺少一个 jar 文件。

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

在 httpcomponent-client 中看起来很像，尝试添加：

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

到您的构建文件。

Answer 2

使用unirest-java-1.4.9-SNAPSHOT-withDependency-ShadedForAndroid. It can be built by following this教程。