What is meant by Ems (related to a TextView)? For example in
Makes the TextView be exactly this many ems wide.
setEms(n) sets the width of a TextView to fit a text of n ‘M’ letters regardless of the actual text extension and text size. See wikipedia Em unit
but only when the
layout_width is set to
layout_width values override the ems width setting.
android:textSize attribute determines the physical width of the view to the textSize * length of a text of n ‘M’s set above.
Ems is a typography term, it controls text size, etc. Check here
It is the width of the letter M in a given English font size.
So 2em is twice the width of the letter M in this given font.
For a non-English font, it is the width of the widest letter in that font. This width size in pixels is different than the width size of the M in the English font but it is still 1em.
So if I use a text with 12sp in an English font, 1em is relative to this 12sp English font; using an Italian font with 12sp gives 1em that is different in pixels width than the English one.
em is the typography unit of font width. one em in a 16-point typeface is 16 points
ems is a unit of measurement
The name em was originally a reference to the width of the capital M. It sets the width of a TextView/EditText to fit a text of n ‘M’ letters regardless of the actual text extension and text size.
android:ems Makes the EditText be exactly this many ems wide.
<EditText android:ems="2" />
denotes twice the width of letter M is created.
em is basically CSS property for font sizes.
The em and ex units depend on the font and may be different for each
element in the document. 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