A method for adjusting a location and a size of a user interface using an electronic device includes a three-axis acceleration sensor. The three-axis accelerometer is activated to detect three-axis acceleration values of the electronic device. A handheld gesture of the electronic device is determined according to the detected three-axis acceleration values. The method calculates a screen size of a touchscreen of the electronic device and calculates a reduction proportion for the user interface displayed on the touchscreen. A new location on the touchscreen for the user interface is determined according to the determined handheld gesture. The method further resizes the user interface according to the calculated reduction proportion, and adjusts a display of the resized user interface according to the confirmed new location.