1. Responsibilities of WMS

1.1 Window Management

• DisplayContent
• WindowToken
• WindowState

1.2 Window Animation

• WindowAnimator

1.3 Transfer station of input system

• InputManagerService (IMS)

1.4 Surface management

• SurfaceFlinger

2. WMS creation process

The WMS is created in the SystemServer process.

3. An important member of WMS

4. Window adding process (WMS processing part)

5. Delete Windows