DemoLoadView. 切换加载中，加载失败，加载成功布局，定义一个LoadViewHelper所有界面通用，通同时也支持单个自定义无需添加布局中view, 大大降低耦合性

Problem

The full read on this project is a sign-in away — what it solves, who it serves, and where it sits in the market.

Audience

The full read on this project is a sign-in away — what it solves, who it serves, and where it sits in the market.

Market

The full read on this project is a sign-in away — what it solves, who it serves, and where it sits in the market.

Pricing

The full read on this project is a sign-in away — what it solves, who it serves, and where it sits in the market.