Java API级别26未识别com.google.android.geo.API_密钥

我正在使用PlaceAutoComplete开发一个带有API26（Android 8.0）的应用程序，要使用它，我需要添加一个谷歌地图API。我遵循了本指南的步骤，当我尝试在代码上使用API时，它不会识别geo。上面说：

error: cannot find symbol
        Places.initialize(getApplicationContext(), com.google.android.geo.API_KEY);

我能做什么？非常感谢

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

给出MainActivity.java中问题的代码行

Places.initialize(getApplicationContext(), com.google.android.geo.API_KEY);

---

XML代码？你在哪里调用API？在MainActivity.java中，等一下，我会编辑代码。你可能需要用你自己的API密钥替换“com.google.android.geo.API_KEY”？不，因为如果你按照我在文章中的指南，它说将其存储在local.properties中更安全

    ## This file is automatically generated by Android Studio.
# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
#
# This file should *NOT* be checked into Version Control Systems,
# as it contains information specific to your local configuration.
#
# Location of the SDK. This is only used by Gradle.
# For customization when using a Version Control System, please read the
# header note.
sdk.dir=/home/myuser/Android/Sdk
API_KEY=my-api-key

Places.initialize(getApplicationContext(), com.google.android.geo.API_KEY);