-hdpi or -xhdpi is not resolution, it's screen density - pixels per inch. hdpi is 240 dpi xhdpi is 320 dpi
mdpi is 160dpi, and is the reference density, at which dp's are same as pixels http://developer.android.com/guide/practices/screens_support.html Images placed in -hdpi will be used as is without scaling on -hdpi devices and will be scaled up on -xhdpi devices (taking 1,77 times more memory). But on the other hand, higher density devices have higher per-app runtime heap limits. -- K 2012/7/16 user123 <[email protected]> > As far I know each folder covers certain resolution range. If I save > bitmaps in hdpi it will be used by devices considered as hdpi. Now, for a > 480 x 800 device, it will not matter if I store there 480 x 800 bitmaps or > let's say 700 x 1000. As far I saw in some tests I made, the bitmaps look > the same, and the memory consumption is the same. > > But now if I don't have folders for higher resolution devices, and don't > use compatibility mode, as far I understand (please somebody correct me if > I'm wrong), the system will try to use the bitmaps from hdpi folder > (right?). And there it will make a difference if the bitmaps are in 480 x > 800 or 700 x 1000, because the system will scale the bitmaps assuming they > are in hdpi size, and if they are actually already in xhdpi size (or near > to it), then it will load a scaled, very big bitmap and this will consume a > lot of memory. > > Saying this, because I had this problem with drawable and drawable-hdpi. I > had erroneusly stored all the bitmaps, which were in hdpi resolution, in > the drawable folder, instead the hdpi folder (hdpi folder was empty), so > the hdpi devices scaled the bitmaps from the drawable folder (which were > already in hdpi) resulting in enourmous bitmaps and out of memory errors. > > Not sure if I will get this problem again with hdpi and xhdpi... if yes, I > can think about 2 solutions: > 1. Disable the scaling for xhdpi using supports-screens tag in the > manifest, this way enabling compatibilty mode. > 2. Scale the bitmaps in hdpi down, so they fit exactly hdpi. But what is > exactly hdpi? Which exact screen resolution should I refer in order to > scale the bitmaps? > > And 3, would be to create bitmaps for xhdpi but that's not a solution for > me, since xhdpi is not explicitedly supported. > > Thanks in advance. > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
