CODEWITHSUNDEEP
androidandroid-drawableandroid-resourcesscreen-resolutionandroid-resolution
ILYAS_Kerbal
ILYAS_Kerbal

Reputation: 1445

Screen densities and images dimensions

Hi Android developers,

I want to know how to choose the dimensions of drawables; for example, I have an image that I want to insert in my app, what size (pixel) the image should be to be inserted inside xxhdpi, xhdpi, hdpi, mdpi, and ldpi ?

I've analyzed many android apps on GitHub, they use random image sizes (pixel) for different densities.

Upvotes: 2

Views: 1277

Answers (3)

Code-Apprentice
Code-Apprentice

Reputation: 83527

To create alternative bitmap drawables for different densities, you should follow the 3:4:6:8:12:16 scaling ratio between the six generalized densities. For example, if you have a bitmap drawable that's 48x48 pixels for medium-density screens, all the different sizes should be:

  • 36x36 (0.75x) for low-density
  • 48x48 (1.0x baseline) for medium-density
  • 72x72 (1.5x) for high-density
  • 96x96 (2.0x) for extra-high-density
  • 144x144 (3.0x) for extra-extra-high-density
  • 192x192 (4.0x) for extra-extra-extra-high-density

Source: https://developer.android.com/guide/practices/screens_support.html#DesigningResources

Upvotes: 2

Atul Vasudev A
Atul Vasudev A

Reputation: 463

Easiest way is to use Android Asset Studio. It will generate all the required resolution of images for respective screen densities

https://romannurik.github.io/AndroidAssetStudio/

Upvotes: 0

Varvara Kalinina
Varvara Kalinina

Reputation: 2063

I suggest you read this answer. It contains all information necessary to decide which units to use. TL;DR is: never use absolute values in pixels, instead, use dp units for views (including images), and sp for text.

Supporting multiple devices is covered here.

Also check the Material Design Guidelines to learn the commonly used dimensions for icons, margins, etc

Upvotes: 0

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