javaandroidlayoutparamsdensity-independent-pixel

Conversion between px and dp unit

I want to set layout_marginTop to 800px using setLayoutParams(). But I want know what would be this value in dp unit?

Thanks in advance.

Solution

  • The logical density of the display is given in the DisplayMetrics class, and can be retrieved with,

    getResources().getDisplayMetrics().density

    Thus, to convert dp to px, you would do,

    int density = getResources().getDisplayMetrics().density;
int px = (int) (dp * density);

    To convert px to dp, just perform the inverse operation,

    int dp = px/density;