发布中的Android Google Maps API无法正常工作

我读了十多个问题和答案，并观看了一些YouTube视频。但我的Android应用程序和Google Maps Release版本无法正常工作。

I have a read a dozen of questions and answers and also watched some YouTube Videos. But my Android App with Google Maps Release Version aint working.

到目前为止我所做的：

What I have done until now:

1. 获取SHA-1代码（是，它是正确的）


2. 在Google Developer中注册
   
3. 创建新项目


4. 设置包名称和项目中的SHA-1


5. 中设置（是，它是正确的）


6. 获取密钥


7. 将google_maps_key下的google项目中的密钥设置为字符串

1. Get the SHA-1 Code (Yes, its the correct one)
2. Register in Google Developer
3. Create new Project
4. Set in the SHA-1
5. Set in the Package Name and Project (Yes, its the correct one)
6. Get the key
7. Set the key in google project under google_maps_key to String

该字符串链接在清单文件中。但它仍然没有工作......！任何想法？

The string is linked in the manifest file. But its still not working...! Any ideas?