Kani made the declaration during an APC rally at Matsaro ward in Hadejia.
The governorship hopeful noted that the APC had better programmes designed to ensure good governance and improve the socio-economic well-being of the people.
The News Agency of Nigeria (NAN) reports that Kani had vied for the seat under the platform of the PDP for the second time having lost to the incumbent Sule Lamido in 2007.
Kani also stepped down for the current gubernatorial candidate, Malam Aminu Ibrahim, during the party’s congress in December.
Receiving the new member, the Jigawa State APC Chairman, Alhaji Ado Kiri, said the party is ready to welcome new members into its fold.
Kiri said that APC had received thousands of PDP supporters who defected to the party in the last few weeks.
He explained that the party had adopted effective campaign strategies to sweep polls in the state.
It is gathered that hundreds of APC supporters including the gubernatorial candidate, Alhaji Badaru Abubakar and his running mate, Ibrahim Hassan, attended the rally.