Question

most of the buttons in the font group are toggle on/off button​

Answer 1

Since Android 4.0, there is another type of toggle button called switch that provides slider control. Android ToggleButton and Switch both are the subclasses of CompoundButton class.
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XML Attributes of ToggleButton class.
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Answer 2

Explanation:

most of the buttons in the front group are two girl on a button true or false