androidandroid-resourcesdpidimension

Load dimension value from res/values/dimension.xml from source code

I'd like to load the value as it is. I have two dimension.xml files, one in /res/values/dimension.xml and the other one in /res/values-sw360dp/dimension.xml.

From source code I'd like to do something like 

getResources().getDimension(R.dimen.tutorial_cross_marginTop);

This works but the value I get is multiplied times the screen density factor (1.5 for hdpi, 2.0 for xhdpi, etc).

I also tried to do 

getResources().getString(R.dimen.tutorial_cross_marginTop);

This would work in principle but I get a string that ends in "dip"...

Solution

  • In my dimens.xml I have

    <dimen name="test">48dp</dimen>

    In code If I do

    int valueInPixels = (int) getResources().getDimension(R.dimen.test)

    this will return 72 which as docs state is multiplied by density of current phone (48dp x 1.5 in my case)

    exactly as docs state :

    Retrieve a dimensional for a particular resource ID. Unit conversions are based on the current DisplayMetrics associated with the resources.

    so if you want exact dp value just as in xml just divide it with DisplayMetrics density

    int dp = (int) (getResources().getDimension(R.dimen.test) / getResources().getDisplayMetrics().density);

    dp will be 48 now