Power supply adaptation method, device and equipment in starting stage of Android equipment

The invention discloses a power supply adaptation method, device and equipment in a starting stage of Android equipment, relates to the technical field of power supply management of the Android equipment, and is used for solving the problem that in the prior art, a large-power device is not adapted by dynamically detecting the power supply capacity in the starting stage of large-screen Android equipment. Comprising the steps that after being powered on, the Android large-screen equipment obtains a power state; when the power supply state is normal, entering a power-on state, starting BOOT to enter a first equipment state machine, obtaining a VBUS power supply state of a USB port, sending the VBUS power supply state to a second equipment state machine, determining the type of a power supply adapter, judging whether an accessed power supply supports a PD protocol or not, starting a PD protocol processing core when the power supply supports the PD protocol, and obtaining a power supply capacity information list