px 和 dp 之间转换疑问

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/**
* 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？

scale

context

float

int

2 replies • 2015-11-02 15:25:45 +08:00

menc

Nov 2, 2015 via iPhone

四舍五入

stdying

Nov 2, 2015

@menc 对呀，要取整，谢谢。