How to use the legacy Apache HTTP client on Android Marshmallow?

Android Studio was complaining that org.apache.http classes like

org.apache.http.NameValuePair
org.apache.http.client.utils.URLEncodedUtils

were missing.

So I added org.apache.http.legacy.jar which is in Android/Sdk/platforms/android-23/optional folder to to app/libs

I also added this line to my app.gradle file

compile files('libs/org.apache.http.legacy.jar')

But if you're using more libraries, you can use this way

compile fileTree(dir: 'libs', include: ['*.jar'])

This resolved all my errors that were caused because google removed support of Apache HTTP client.

useLibrary 'org.apache.http.legacy' did not work for me until I upgraded the Gradle tools version in my main build.gradle file of my Android Studio project, as follows:

dependencies {
    classpath 'com.android.tools.build:gradle:1.3.0'
}