Scale factor for xxhdpi android?

77
votes

according to http://developer.android.com/training/multiscreen/screendensities.html

The following scale factors are mentioned

xhdpi: 2.0 hdpi: 1.5 mdpi: 1.0 (baseline) ldpi: 0.75

I was wondering what the scale factor would be for xxhdpi?

2
androidandroid-screen-support
Does it even support xxhdpi? Not like Google to miss something out of the docs – musefan
@musefan , android sdk creates a folder automatically since the start of this year atleast , called drawable-xxhdpi . Also S4 , HTC ONE , and Xperia Z are xxhdpi . I have seen them take resources from the xxhdpi bucket . they are way above the xhdpi (240) level – Muhammad Ahmed AbuTalib
see my answer here too – mehrdad khosravi

2 Answers

282
votes

In android.util.DisplayMetrics, you can see that scaling factor is 0.00625:

/**
 * Scaling factor to convert a density in DPI units to the density scale.
 * @hide
 */
public static final float DENSITY_DEFAULT_SCALE = 1.0f / DENSITY_DEFAULT;

Where as DENSITY_DEFAULT is 160 --> scaling factor = 1.0f / 160 = 0.00625.

sizeScale = DENSITY_DEFAULT_SCALE * DENSITY_DPI

From this:

  • ldpi = 0.00625 * 120 -> 0.75
  • mdpi = 0.00625 * 160 -> 1.0
  • hdpi = 0.00625 * 240 -> 1.5
  • xhdpi = 0.00625 * 320 -> 2.0
  • xxhdpi = 0.00625 * 480 -> 3.0
  • xxxhdpi = 0.00625 * 640 -> 4.0

Not exactly a rocket science, but hope this will be useful for someone :)

6
votes

If you look at Metrics and Grids you'll see that xxhdpi is 480 dpi which is 3 times that of the baseline (mdpi @ 1.0). In other words the scale factor for xxhdpi is 3.0