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May 14, 2015 03:49
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Android dp转换到px时为什么需要 +0.5f
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| 将dp转换为px时，我们通常的做法： | |
| public static float convertDpToPixel(float dp, Context context){ | |
| final float density = getResources().getDisplayMetrics().density; | |
| return (dp * scale + 0.5f); | |
| } | |
| 那么为什么需要+0.5f呢？ | |
| 在官方文档中：http://developer.android.com/guide/practices/screens_support.html | |
| 有这样一句话： Then add 0.5f to round the figure up to the nearest whole number, when converting to an integer. | |
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向上取整吧