Catalysis of the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: alpha-glucoside(out) + H+(out) = alpha-glucoside(in) + H+(in). Alpha-glucosides include trehalose, maltose, turanose, isomaltose, alpha-methylglucoside, maltotriose, palatinose, trehalose and melezitose.