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stdying
V2EX  ›  Android

px 和 dp 之间转换疑问

  •  
  •   stdying · Nov 2, 2015 · 12134 views
    This topic created in 3835 days ago, the information mentioned may be changed or developed.
    /**
    * dip to px
    */
    public static int dip2px(Context context, float dpValue) {
    final float scale = context.getResources().getDisplayMetrics().density;
    return (int) (dpValue * scale + 0.5f);
    }

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

    关于转换中 0.5f 起什么作用?
    2 replies    2015-11-02 15:25:45 +08:00
    menc
        1
    menc  
       Nov 2, 2015 via iPhone
    四舍五入
    stdying
        2
    stdying  
    OP
       Nov 2, 2015
    @menc 对呀,要取整,谢谢。
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