Maybe it's a late answer but I want to share what I know.
Firstly, you can import easily by using Google's font url, but this will not work if user's device doesn't have internet connection:
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
INSTEAD, I recommend importing the whole font into the project. To do this, you can download all MaterialIcons font types of different platforms(eot, ttf, woff, woff2, ijmap, svg):
https://drive.google.com/file/d/1pq9dHrfWBsd5NFoaaB76tZ8nEzBbGrbN/view?usp=sharing
Then, extract files and move them under assets/fonts/ folder of your Ionic project. In the variables.scss you can find this line of code:
$font-path: "../assets/fonts";
If you don't have just add that line. And also, introduce your project with new font by adding these code blocks into the variables.scss:
@font-face {
font-family: 'Material Icons';
font-style: normal;
font-weight: 400;
src: url($font-path + '/MaterialIcons-Regular.eot'); /* For IE6-8 */
src: local('Material Icons'),
local('MaterialIcons-Regular'),
url($font-path + '/MaterialIcons-Regular.woff2') format('woff2'),
url($font-path + '/MaterialIcons-Regular.woff') format('woff'),
url($font-path + '/MaterialIcons-Regular.ttf') format('truetype');
}
.material-icons {
font-family: 'Material Icons';
font-weight: normal;
font-style: normal;
font-size: 24px; /* Preferred icon size */
display: inline-block;
line-height: 1;
text-transform: none;
letter-spacing: normal;
word-wrap: normal;
white-space: nowrap;
direction: ltr;
-webkit-font-smoothing: antialiased;
text-rendering: optimizeLegibility;
-moz-osx-font-smoothing: grayscale;
font-feature-settings: 'liga';
}
That's it! Use the icons where you need them:
<i class="material-icons">icon_name_here</i>