Here you can find the source of px2sp(Context context, float pxValue)
public static int px2sp(Context context, float pxValue)
//package com.java2s; import android.content.Context; public class Main { public static int px2sp(Context context, float pxValue) { final float scale = getDensity(context); return (int) (pxValue / scale + 0.5f); }//w ww . jav a 2 s . c om /** * * @param context * @return */ public static float getDensity(Context context) { return context.getResources().getDisplayMetrics().density; } }