包含：各种图标资源库
emojicon: https://github.com/rockerhieu/emojicon
A library to show emoji in TextView, EditText (like WhatsApp) for Android
material-design-icons: https://github.com/google/material-design-icons
Material Design icons by Google.http://google.github.io/material-design-icons/
material-icon-lib: https://github.com/code-mc/material-icon-lib
Library containing over 1000 material vector icons that can be easily used as Drawable or as a standalone View.
Android-Iconics: https://github.com/mikepenz/Android-Iconics
Android-Iconics - Use any icon font, or vector (.svg) as drawable in your application. http://mikepenz.github.io/Android-Iconics
android-iconify: https://github.com/JoanZapata/android-iconify
Android integration of multiple icon providers such as FontAwesome, Entypo, Typicons,... http://joanzapata.com/android-iconify
