Android does not need to apply for a key when using Google map API V3!

When loading Google maps, the instructor said that the V3 version was used, so I searched for how to use V2 and how to apply for a key on the webpage.

I asked my teacher how to use V3. I always thought I wanted to upgrade something.

The instructor said that key is not required for V3,

This is not nonsense. I know it too. But how to use it? Oh, my God, there's no place to find it.

So we should try it with V2 first. Later we found that the difference was too big

Later, I saw the instructor use webview. I understood that a browser was installed on the Android phone, because V3 was written in Js.

Okay, don't understand, you still go to the official website to see, I paste the address to your http://code.google.com/intl/zh-CN/apis/maps/articles/android_v3.html

I hope I can find this article, and I don't have to worry too much about it.