Meizu metal notification bar symbol

if the "∞" icon is displayed in the notification bar of Meizu mobile phone, it means that there is a third-party APP running in the background.

Background knowledge:

1. The flyme system of Meizu mobile phone has specially designed hundreds of small icons in the notification bar for mainstream apps. When there are notifications and pushes, the icons will appear in the notification bar, such as ink weather, Taobao push, etc.

2. If a third-party APPlication is not included in the small icon making scheme, an "∞" icon will be uniformly displayed in the notification bar, indicating that there is a third-party app running in the background.

3. After the background cache of the APP is clear, the "∞" icon can be removed.