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?

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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

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最佳答案

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 :)


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