Metal housing, antenna assembly and electronic device

An electronic device, comprising:

• an antenna assembly comprising a metal casing and at least one switch, the metal casing comprising a peripheral frame provided with at least one micro-seam zone, the at least one micro-seam zone dividing the peripheral frame into at least one segment of frame body, each micro-seam zone being formed by at least two micro-seams arranged at intervals, and a metal piece being provided between two adjacent micro-seams;
• the switch comprising a first end and at least one second end, the first end being electrically coupled to the frame body divided by the micro-seam zone, the at least one second end electrically coupled to the metal piece, and the at least one segment of frame body divided by the at least one micro-seam zone being an independent antenna comprised by the antenna assembly,
• wherein the peripheral frame is provided with four micro-seam zones and every two micro-seam zones form one segment of frame body such that four frame bodies are formed;
• the frame bodies at least comprise a first frame body and a second frame body and two switches are provided, the first frame body is electrically coupled to one or more metal pieces within one adjacent micro-seam zone by means of one of the two switches, and the second frame body is electrically coupled to one or more metal pieces within another adjacent micro-seam zone by means of the other of the two switches.