在app中的build.gradle中加入如下代码，
configurations { ???all*.exclude group: ‘com.google.code.gson‘ ???all*.exclude group: ‘com.squareup.okhttp3‘ ???all*.exclude group: ‘com.squareup.okio‘ ???all*.exclude group: ‘com.android.support‘,module:‘support-v13‘}如图
Error: Program type already present: okhttp3.Authenticator$1
原文地址：https://www.cnblogs.com/sea-stream/p/10596895.html