In EditText there is an attribute named android:ems. The description
is "Makes the EditText be exactly this many ems wide"
What does ems mean?
Answer
Taken from: http://www.w3.org/Style/Examples/007/units:
The em is simply the font size. In an element with a 2in font, 1em
thus means 2in. Expressing sizes, such as margins and paddings, in em
means they are related to the font size, and if the user has a big
font (e.g., on a big screen) or a small font (e.g., on a handheld
device), the sizes will be in proportion. Declarations such as
'text-indent: 1.5em' and 'margin: 1em' are extremely common in CSS.
em is basically CSS property for font sizes.
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