google official demonstration: when the variable starts with m in android

The content comes from the google android official website

Follow Field Naming Conventions

• Non-public, non-static field names start with m.

• Static field names start with s.

• Other fields start with a lower case letter.

• Public static final fields (constants) are ALL_CAPS_WITH_UNDERSCORES.

Here is a clear description of the naming rules:

• Variables of non-public and non-static domains start with m (in fact, they are protected and private member variables)
• Static variables start with s
• Other variables start with a lowercase letter
• Public static final variables (constants) are all uppercase underlined ALL_CAPS_WITH_UNDERSCORES