Re: How can I mobile hotspot chromecast to my android
I'm not sure you need to. The Chromecast broadcasts its own network prior to being configured, the device you use to configure it will connect to that network using the Chromecast app so that it can configure. Once its configured, there is a PIN that displays on the screen, that can be used by others that are not on your WiFi (if you have WiFi) to connect directly to the device so it can be used by them to share something. You might be able to use that and not bother with the hotspot.
A point on the hotspot, your phone can't connect to its own WiFi hotspot. Also, devices connected to the hotspot are segregated, they can't communicate with each other so this wouldn't work anyway.