The document provides a tutorial on using SVG (Scalable Vector Graphics) in Android applications, detailing its definition, graphics quality, and animation attributes. It outlines the necessary icon sizes for different Android screen densities and types, explaining contextual, notification, action bar, and launcher icons. Additionally, the document describes the Victor Android plugin for implementing SVG, including installation steps, known issues, and examples of usage.

1. Vector Drawable
SVG
Tutorial (Android)
Mr. THANN Phearum,
Associate Software Engineering

2. Outline
- Intro.
- Icon Sizes
- Implement
- Demo
- Ref.

3. Intro.
- SVG?
● SVG stands for Scalable Vector Graphics
● SVG is used to define vector-based graphics for the Web
● SVG defines the graphics in XML format
● SVG graphics do NOT lose any quality if they are zoomed or resized
● Every element and every attribute in SVG files can be animated
● SVG is a W3C recommendation
● SVG integrates with other W3C standards such as the DOM and XSL
Source: http://www.w3schools.com/svg/

4. Into. (cont.)
- Example
<svg xmlns="http://www.w3.org/2000/svg"
width="48" height="48" viewBox="0 0 48 48">
<path d="M38 16H10c-3.31 0-6 2.69-6
6v12h8v8h24v-8h8V22c0-3.31-2.69-6-6-6zm-6
22H16V28h16v10zm6-14c-1.11 0-2-.89-2-2s.
89-2 2-2c1.11 0 2 .89 2 2s-.89 2-2 2zM36
6H12v8h24V6z"/>
</svg>
ic_printer.svg
NOTE: (width="48" and height="48") is baseline size to scale the image

5. Into. (cont.)
- Tools to create .svg
Illustrator (WIndow, Mac)
InkScape (Linux)

6. Icon Sizes
Android icons require five separate sizes for different screen pixel densities.

7. Icon Sizes (cont.)
Android also classify the icon into four types
- Small Contextual
Small icons are used to surface actions and/or provide status for specific items.
For example, in the Gmail app, each message has a star icon that marks the message as important.
- Notification
These are used to represent application notifications in the status bar. They should be flat (no
gradients), white and face-on perspective
- Actionbar, Dialog & Tab
These icons are used in the action bar menu. The first number is the size of the icon area, and the
second is file size.
- Launcher
Three-dimensional, front view, with a slight perspective as if viewed from above, so that users
perceive some depth.

8. Icon Sizes (cont.)
- Small Contextual - Notification
16 × 16 (mdpi)
24 × 24 (hdpi)
32 × 32 (xhdpi)
48 × 48 (xxhdpi)
64 × 64 (xxxhdpi)
22 × 22 area in 24 × 24 (mdpi)
33 × 33 area in 36 × 36 (hdpi)
44 × 44 area in 48 × 48 (xhdpi)
66 × 66 area in 72 × 72 (xxhdpi)
88 × 88 area in 96 × 96 (xxxhdpi)

9. Icon Sizes (cont.)
- Actionbar - Launcher
24 × 24 area in 32 × 32 (mdpi)
36 × 36 area in 48 × 48 (hdpi)
48 × 48 area in 64 × 64 (xhdpi)
72 × 72 area in 96 × 96 (xxhdpi)
96 × 96 area in 128 × 128 (xxxhdpi)
48 × 48 (mdpi)
72 × 72 (hdpi)
96 × 96 (xhdpi)
144 × 144 (xxhdpi)
192 × 192 (xxxhdpi)

10. Icon Sizes (cont.)
- Example
Actionbar, Dialog & Tab
24 × 24 area in 32 × 32 (mdpi)

11. Implement
- Victor
Android plugin library to use .svg as resources.
It supports from Android 2.x.
Source: https://github.com/trello/victor

12. Implement (cont.)
- Victor Installation
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.trello:victor:0.1.4'
}
}
apply plugin: 'com.android.application'
// Make sure to apply this plugin *after* the Android plugin
apply plugin: 'com.trello.victor'

13. Implement (cont.)
- Victor Known Issues
Android Studio doesn't recognize generated resources in XML.
<ImageView
android:id="@+id/img_mdpi"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="@dimen/margin_small"
android:src="@drawable/ic_person" />

14. Implement (cont.)
- Victor Example Code
We can set drawable to the ImageView in Java file.
@Bind(R.id.img_mdpi)
ImageView imgMdpi;
imgMdpi.setImageResource(R.drawable. ic_person);

15. Demo
I have create a sample application to test with vector
drawable. Please check.
https://github.com/THANNPhearum/GGVectorDrawable

17. Ref.
- SVG def.
http://www.w3schools.com/svg/
- Android Icons Size
http://iconhandbook.co.uk/reference/chart/android/
- Victor Android Library
https://github.com/trello/victor