density-independent-pixel

I need to code the layout of the android widgets using dip/dp (in java files). At runtime if I code, int pixel=this.getWindowManager().getDefaultDisplay().getWidth() ; this return the screen width in pixels (px). To convert this to dp, I coded: int dp =pixel/(int)getResources().getDisplayMetrics().density ; This does not seem to be returning correct answer. I made the emulator of WVGA800 whose screen resolution is 480 by 800. When the run the emulator and let the code print the values of pixel and dp, it came to 320 in both. This emulator is 240 dpi whose scale factor would be 0.75. Dax Try

I have known the difference among DP , SP and PX . And after searching this topic, I found nothing satisfying me completely. Maybe this post is a duplicate, but I still want to know what is the formula of converting from DP to PX , and DP to SP , from SP to PX , from PX to SP , from SP to DP , from DP to SP ? I have known some codes to do this, but they are imperfect. DP to PX: public static int dpToPx(float dp, Context context) { return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, context.getResources().getDisplayMetrics()); } SP to PX: public static int spToPx(float sp,

I am trying to calculate a variable amount of pixels to density independent pixels and vice-versa. This formula (px to dp): dp = (int)(px / (displayMetrics.densityDpi / 160)); does not work on small devices because it is divided by zero. This is my dp to px formula: px = (int)(dp * (displayMetrics.densityDpi / 160)); Could someone give me some pointers? Bachi Note: The widely used solution above is based on displayMetrics.density . However, the docs explain that this value is a rounded value, used with the screen 'buckets'. Eg. on my Nexus 10 it returns 2, where the real value would be 298dpi