英文:
Exactly same size for all screens physically in Android
问题
如何可能使任何物体的尺寸在所有屏幕上在物理上保持相同大小？
英文:
how is it possible that dimensions of any object physically same size on all screens?
答案1
得分: 0
从安卓开发者文档中：
> 为了在不同密度的屏幕上保持UI的可见大小，您必须使用密度无关像素（dp）作为您的测量单位来设计UI。一个dp是一个虚拟像素单位，大致相当于中密度屏幕（160dpi；“基准”密度）上的一个像素。Android会将这个值转换为其他每个密度的适当像素数量。
> 例如，考虑图1中的两台设备。如果您定义一个视图宽度为“100px”，它在左侧的设备上会显得更大。因此，您必须改为使用“100dp”来确保它在两个屏幕上显示相同的大小。
因此，您想要实现的目标可以通过将对象的高度和宽度属性的单位设置为dp来实现。
英文:
From the android developer's documentation:
> To preserve the visible size of your UI on screens with different
> densities, you must design your UI using density-independent pixels
> (dp) as your unit of measurement. One dp is a virtual pixel unit
> that's roughly equal to one pixel on a medium-density screen (160dpi;
> the "baseline" density). Android translates this value to the
> appropriate number of real pixels for each other density.
>
> For example, consider the two devices in figure 1. If you were to
> define a view to be "100px" wide, it will appear much larger on the
> device on the left. So you must instead use "100dp" to ensure it
> appears the same size on both screens.
So, what you are trying to achieve is possible using dp as the unit for the height and width properties of the object.
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