Android 常用参考文档

本文记录安卓开发过程中常用的参考数据。

1. API Level 与系统版本号对应关系

系统版本号	API Level	版本代号	发布时间
Android 6.0	23	M	2015.10
Android 5.1	22	Lollipop_mr1
Android 5.0	21	Lollipop
Android 4.4w	20	KITKAT_WATCH
Android 4.4	19	KITKAT
Android 4.3	18	JELLY_BEAN_MR2
Android 4.2, 4.3	17	JELLY_BEAN_MR1
Android 4.1, 4.1.1	16	JELLY_BEAN
Android 4.0.3, 4.0.4	15	ICE_CREAM_SANDWITCH_MR1
Android 4.0, 4.0.1, 4.0.2	15	ICE_CREAM_SANDWITCH
Android 3.2	13	HONEYCOMB_MR2
Android 3.1.X	12	HONEYCOMB_MR1
Android 3.0.X	11	HONEYCOMB
Android 2.3.3, 2.3.4	10	GINGERBREAD_MR1
Android 2.3, 2.3.1, 2.3.2	9	GINGERBREAD
Android 2.2.X	8	FROYO
Android 2.1.X	7	ECLAIR_MR1
Android 2.0.1	6	ECLAIR_0_1
Android 2.0	5	ECLAIR
Android 1.6	4	DONUT
Android 1.5	3	CUPCAKE
Android 1.1	2	BASE_1_1
Android 1.0	1	BASE	2008.09

戳我查看官方文档

2. dp和px换算关系对照表

为了适配多种分辨率，我们要按照 3:4:6:8 的比例来为上述资源文件夹设计图片文件，具体如下：

分辨率	DPI	示例设备	换算比例	像素	备注
ldpi	120	Galaxy Y	0.75x	1dp = 0.75px
mdpi	160	Galaxy Tab	1.0x	1dp = 1px
hdpi	240	Galaxy S II	1.5x	1dp = 1.5px
xhdpi	320	Nexus 4	2.0x	1dp = 2px	720p
xxhdpi	480	Nexus 5	3.0x	1dp = 3px	1080p
xxxhdpi	640	Nexus 6	4.0x	1dp = 4px

3. 图标尺寸一览表

Launcher icons
Three-dimensional, front view, with a slight perspective as if viewed from above, so that users perceive some depth.

尺寸(px)	格式	备注
48 × 48 (mdpi)	.png
72 × 72 (hdpi)	.png
96 × 96 (xhdpi)	.png
144 × 144 (xxhdpi)	.png
192 × 192 (xxxhdpi)	.png
512 × 512 (Google Play store)	.png

Action bar, Dialog & Tab icons
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.

尺寸(px)	格式	备注
24 × 24 area in 32 × 32 (mdpi)	.png
36 × 36 area in 48 × 48 (hdpi)	.png
48 × 48 area in 64 × 64 (xhdpi)	.png
72 × 72 area in 96 × 96 (xxhdpi)	.png
96 × 96 area in 128 × 128 (xxxhdpi)	.png

Small Contextual Icons
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.

尺寸(px)	格式	备注
16 × 16 (mdpi)	.png
24 × 24 (hdpi)	.png
32 × 32 (xhdpi)	.png
48 × 48 (xxhdpi)	.png
64 × 64 (xxxhdpi)	.png

Notification icons
These are used to represent application notifications in the status bar. They should be flat (no gradients), white and face-on perspective.

尺寸(px)	格式	备注
22 × 22 area in 24 × 24 (mdpi)	.png
33 × 33 area in 36 × 36 (hdpi)	.png
44 × 44 area in 48 × 48 (xhdpi)	.png
66 × 66 area in 72 × 72 (xxhdpi)	.png
88 × 88 area in 96 × 96 (xxxhdpi)	.png

参考文献：

• http://iconhandbook.co.uk/reference/chart/android/
• https://www.google.com/design/spec/style/icons.html
• https://www.creativefreedom.co.uk/icon-designers-blog/simple-android-icon-size-guide-for-lollipop-5-1/
• https://www.google.com/design/spec/patterns/notifications.html#
• https://www.google.com/design/spec/style/icons.html#icons-system-icons
• http://petrnohejl.github.io/Android-Cheatsheet-For-Graphic-Designers/