Android httpClient.jar 在Android Studio 中的使用方法

不需要导入httpClient.jar.

只要添加高亮配置：
android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"

    useLibrary 'org.apache.http.legacy'

    defaultConfig {
        minSdkVersion 14
        targetSdkVersion 23
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-project.txt'
        }
    }

    packagingOptions {
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/DEPENDENCIES'
    }

}