** 直接上代碼：**

package com.xxx.utils;

import com.xxx.base.SczwApplication;
import android.content.Context;
import android.content.res.Resources;

public class DimensUtils {
    public static Context getContext() {
        return SczwApplication.getContext();
    }

    /**
     * 得到Resource對象
     */
    public static Resources getResources() {
        return getContext().getResources();
    }
    
     /**
      * 將px值轉換為dip或dp值，保證尺寸大小不變
      */
     public static int px2dip(float pxValue) {
       float density = getResources().getDisplayMetrics().density;
       return (int) (pxValue / density + 0.5f);
     }

     /**
      * 將dip或dp值轉換為px值，保證尺寸大小不變
      */
     public static int dip2px(float dipValue) {
         float density = getResources().getDisplayMetrics().density;
         return (int) (dipValue * density + 0.5f);
     }

     /**
      * 將px值轉換為sp值，保證文字大小不變
      */
     public static int px2sp(float pxValue) {
         float density = getResources().getDisplayMetrics().density;
         return (int) (pxValue / density + 0.5f);
     }

     /**
      * 將sp值轉換為px值，保證文字大小不變
      */
     public static int sp2px(float spValue) {
         float density = getResources().getDisplayMetrics().density; 
         return (int) (spValue * density + 0.5f);
     }
    }