我看到您已经尝试了本教程.您描述的问题通常在密钥出现问题时发生.

I see that you have tried my tutorial. The problem you describe usually happens when there is a problem with your key.

也请仔细阅读下一个教程以获取您的密钥:

Please go over the next tutorial as well for getting your key:

Google Map API V2密钥

这对您无济于事，请尝试删除 debug.keystore 文件夹并运行任何android项目以重新创建新密钥，然后执行使用以下命令将密钥与您的项目相关联的所有过程控制台再次出现.

it this doesn't help you, try to delete the debug.keystore folder and run any android project to recreate a new key, and perform all the process of associating your key to your project using the console all over again.

然后再次检查您是否在清单文件中添加了第一个教程的所有权限.

And check again that you are adding all the permissions from the first tutorial in you manifest file.