Android中px与dip，sp与dip等的转换工具类

public static int dip2px(Context context, float dipValue){
final float scale = context.getResources().getDisplayMetrics().density;
return (int)(dipValue * (scale + 0.5f));
}

public static int px2dip(Context context, float pxValue){
final float scale = context.getResource().getDisplayMetrics().density;
return (int)(pxValue / (scale + 0.5f));
}