It is important to establish what your state of residence is in view of the residency definitions of each state in which you live over a year.
You might be considered a California "resident", "part year resident", or "non resident" depending on the specifics of your situation. If a CA resident, your total year retirement income is subject to CA tax, potentially offset by tax paid to another state. If a part year resident, your retirement income while present in CA is subject to CA tax, again possibly offset by tax paid to another state but depending on how each state handles your situation. If a non resident, your retirement income is likely not taxable by CA.
California is a bit picky about how full, part, or non "residency" is established. It would be wise to review California's FTB Publication 1031, "Guidelines for Determining Resident Status" at:
https://www.ftb.ca.gov/forms/2015/15_1031.pdf
