遭遇“GsonFactory cannot be resolved”

遭遇GsonFactory无法解析的错误：

...\HelloAnalytics.java:7: error: package com.google.api.client.json.gson does not exist
import com.google.api.client.json.gson.GsonFactory;
                                      ^
...\HelloAnalytics.java:28: error: cannot find symbol
  private static final JsonFactory JSON_FACTORY = GsonFactory.getDefaultInstance();
                                                  ^
  symbol:   variable GsonFactory
  location: class HelloAnalytics
2 errors
:compileJava FAILED

解决方案为在_gradle.build_中添加：

compile 'com.google.api-client:google-api-client-gson:1.20.0' exclude module: 'httpclient'

参考

GsonFactory cannot be found