A method of providing a background of an electronic device with a touch screen, comprising: displaying one or more contact groups while the electronic device is in a user-interface unlock state; detecting a first touch input applied to a contact group of the one or more contact groups on or near the touch screen, wherein each of the one or more contact groups comprises a plurality of contacts; and in response to detecting the first touch input applied to the contact group on or near the touch screen, displaying respective contact images (3410, 3420, 3430, 3440) of a plurality of contacts in the contact group to which the first touch input is applied on the touch screen while the electronic device is in a user-interface lock state, wherein in response to a displayed first contact image of a contact in the contact group, wherein the contact corresponds to a first one of a plurality of default actions, a default action icon (3410-a, 3420-a, 3430-a, 3440-a) of the first default action is displayed in the contact image (3410, 3420, 3430, 3440) of the contact, in response to the displayed first contact image of the contact in the contact group, wherein the contact does not correspond to any default action, no default action icon is displayed in the contact image (3410, 3420, 3430, 3440) of the contact, and detecting a second touch input applied to a second contact image of the contact images (3410, 3420, 3430, 3440) on or near the touch screen to unlock the electronic device while the electronic device is in a user-interface lock state, wherein the second contact image (3410, 3420, 3430, 3440) does not correspond to any default action; moving the second contact image (3410, 3420, 3430, 3440) in accordance with the second touch input; in response to the second contact image (3410, 3420, 3430, 3440) moved to a designated displayed area: displaying an action define screen comprising a plurality of default action icons for selection, wherein default actions corresponding to the default action icons at least comprise one of making a phone call, sending a short message, sending an e-mail, and viewing the details of the second contact; setting the default action corresponding to a selected default icon of the default action icons as a second default action corresponding to the second contact image (3410, 3420, 3430, 3440). displaying one or more contact groups while the electronic device is in a user-interface unlock state; detecting a first touch input applied to a contact group of the one or more contact groups on or near the touch screen, wherein each of the one or more contact groups comprises a plurality of contacts; and in response to detecting the first touch input applied to the contact group on or near the touch screen, displaying respective contact images (3410, 3420, 3430, 3440) of a plurality of contacts in the contact group to which the first touch input is applied on the touch screen while the electronic device is in a user-interface lock state, wherein in response to a displayed first contact image of a contact in the contact group, wherein the contact corresponds to a first one of a plurality of default actions, a default action icon (3410-a, 3420-a, 3430-a, 3440-a) of the first default action is displayed in the contact image (3410, 3420, 3430, 3440) of the contact, in response to the displayed first contact image of the contact in the contact group, wherein the contact does not correspond to any default action, no default action icon is displayed in the contact image (3410, 3420, 3430, 3440) of the contact, and detecting a second touch input applied to a second contact image of the contact images (3410, 3420, 3430, 3440) on or near the touch screen to unlock the electronic device while the electronic device is in a user-interface lock state, wherein the second contact image (3410, 3420, 3430, 3440) does not correspond to any default action; moving the second contact image (3410, 3420, 3430, 3440) in accordance with the second touch input; in response to the second contact image (3410, 3420, 3430, 3440) moved to a designated displayed area: displaying an action define screen comprising a plurality of default action icons for selection, wherein default actions corresponding to the default action icons at least comprise one of making a phone call, sending a short message, sending an e-mail, and viewing the details of the second contact; setting the default action corresponding to a selected default icon of the default action icons as a second default action corresponding to the second contact image (3410, 3420, 3430, 3440). displaying an action define screen comprising a plurality of default action icons for selection, wherein default actions corresponding to the default action icons at least comprise one of making a phone call, sending a short message, sending an e-mail, and viewing the details of the second contact; setting the default action corresponding to a selected default icon of the default action icons as a second default action corresponding to the second contact image (3410, 3420, 3430, 3440).