Physical Buttons

Although different phones have different configurations, most have physical buttons for power and volume control. They also have Home, Menu, Back, and Search buttons, along with a trackball. Some phones also have a Camera button, a green Call button, and a red End Call button. Figure 2-1 is taken from the Android developer's kit, and while you'll never see a phone that looks like this, it shows you the possible physical buttons that could be on your phone.

Figure 2-1. Buttons
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