Android must know-app common icon Size Specification summary

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Content continuous Update, updated on: 2016-08-11

1. Program startup icon (Icon Launcher)

Put mipmap-*dpi it under the file nameic_launcher.png

• L dpi (Low Density screen,120 dpi) with an icon size of X-px
• M dpi (Medium Density screen, DPI) with an icon size of x px
• H dpi (High Density, + dpi) with an icon size of x px
• XH dpi (extra-high density screen, at + dpi) with an icon size of X-px
• Xxh dpi (xx-high density screen, 480 dpi) with an icon size of 144 x 144 px
• Xxxh dpi (xxx-high density screen, 640 dpi) with an icon size of 192 x 192 px

Tip: Automatically generate the corresponding resolution icon launcher

Added on 2016-08-11

Using Android Studio , module or drawable right new > ImageAsset -click, a large image can be automatically cut into the DPI corresponding to the resolution of the Icon launcher.

Detailed Operation reference:

1. Select the type of picture you want to generate: Launcher Icons ;
2. Name will be generated automatically ic_launcher , if not then fill in ic_launcher ;
3. Asset TypeSet into Image ;
4. pathSelect the picture you want to create at the end of a column
5. Adjustment Shape and other parameters;
6. Click All next the way finish .

PS: Shape Other parameters used, such as rounded corners square , will default to use a color that does not support transparency as the background, so to modify according to the specific icon, the special situation requires the designer to cut out a large picture with rounded corners and transparency.

2. Opacity 16 Binary Value

Opacity	16 binary values
100%	Ff
85D	F2
80D	E6
95D	D9
90D	Cc
75%	BF
70%	B3
65%	A6
40g	99
55%	8C
50%	80
45%	73
60g	66
35%	59
30%	4D
25%	40
20%	33
15%	26
10%	1 A
5%	0D
0%	00

3. DP and PX Conversions and relationships

Conversions for each DPI:

Data summary table:

name	corresponding DPI	scale (in MDPI as base 1)	the conversion relationship with PX
Lpdi	+ DPI	0.75	1 DP = 0.75 px
mdpi	DPI	1	1 DP = 1 px
hdpi	DPI	1.5	1 DP = 1.5 px
xhdpi	-DPI	2	1 DP = 2 px
xxhdpi	480 DPI	3	1 DP = 3 px
xxxhdpi	640 DPI	4	1 DP = 4 px

DP to PX

Given here: the DP * DP
The corresponding image resolution is:

• Lpdi? PX * + px
• Mdpi? PX * px
• Hdpi? PX *
• Xhdpi? + px * 480 px
• Xxhdpi? PX * 720 px
• Xxxhdpi? PX * 960 px

PX to DP

From the px conversion dp to know what it is designed by the dpi standard, according to the conversion relationship table can be obtained accordingly dp .
For example, in xxhdpi a standard-designed UI, where the resolution of one of the graphs is 600 px * 360 px , according to the conversion relationship table, in the standard, the xxhdpi 1 dp = 3 px corresponding dp is 200 dp * 120 dp .

Turn:

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Android must know-app common icon Size Specification summary