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androidandroid-screen-support

Scale factor for xxhdpi android?

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?

Solution

  • 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 :)