Android - Screen Resolution and Screen Density

android android-screen android-resolution
Paresh Mayani picture Paresh Mayani · Sep 27, 2010 · Viewed 9.8k times · Source

As per managing resources(images) in > Android 1.6 version, we need to keep different-resolutions image in Drawable-Hdpi, Drawable-Mdpi, Drawable-Lpi folder particularly.

And as per this page: http://developer.android.com/guide/practices/screens_support.html ,

In Low density section - there are three resolutions used: 240*320 , 240x400 , 240x432 for the Small screen, Normal Screen, Large Screen particularly.

same way for Medium density section - there are three resolutions used: 320x480 , 480x800 , 480x854 for the Small screen, Normal Screen, Large Screen particularly.

and same way for High density ........

but i am confused here:

(1) How do i come to know that whether small, Normal or Large screen is used, i mean is there any way to know ?

(2) How do i come to know which type of density i am using ?

(3) And in Drawable-Hdpi, Drawable-Mdpi, Drawable-ldpi folder, which resolution's image we should keep particularly?

pls share your knowledge.

Answer

omermuhammed picture omermuhammed · Sep 27, 2010

There are specific Android API calls that can, at runtime tell you what density and (small/large/normal) screen size a handset has. However, as a developer we should not need to worry about individual handsets at all. All we need to do is to have ldpi/mdpi/hdpi assets and small/normal/large layouts in the apk. Android internally handles everything.

Dont forget to get an indepth understanding of how Android determines which assets to use and aliasing here.

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