is it important to name drawable-hdpi for image in hdpi resolution?

Issue

I did some google search and look at documentation but i didn't find my answer. Suppose i have an image and two version of it. One for hdpi devices and the other for ldpi devices . Is it important to have two folder with exact name drawable-hdpi and drawable-ldpi ? If yes is this the pattern to use drawable-amountofpixel ? If no how android knows which folder to use when app is running on a hdpi device ?

Solution

Is it important to have two folder with exact name drawable-hdpi and drawable-ldpi ?

Yes. More accurately, it is important to have two directories that start with drawable and contain -hdpi and -ldpi as appropriate. It is possible to have more complex scenarios (e.g., drawable-sw800-hdpi).

If yes is this the pattern to use drawable-amountofpixel ?

The pattern is to use the density qualifiers that are covered in the documentation. See:

• The "screen density (pixel)" row in the roster of resource set qualifiers

• Supporting Multiple Screens

Answered By - CommonsWare