由网友(你幸福就好?? ,)分享简介：我发现，有可能设置的使用DIP封装的XML布局我的界面元素尺寸作为下面的片段：I found that it is possible to set dimensions of my interface elements in XML layouts using DIPs as in following fragmen...

我发现，有可能设置的使用DIP封装的XML布局我的界面元素尺寸作为下面的片段：

I found that it is possible to set dimensions of my interface elements in XML layouts using DIPs as in following fragment:

android:layout_width="10dip"

但是，所有的Java接口采用整数作为参数，并没有办法来指定DIP封装尺寸。什么是计算这个正确的方法是什么？

But all Java interface takes integer as arguments and there is no way to specify dimensions in DIPs. What is the correct way to calculate this?

我想，我一定要使用 DisplayMetrics 类物业密度，但是这是一个正确的方法是什么？

I figured that I have to use property density of DisplayMetrics class but is this a correct way?

我可以靠这个公式是总是正确的？

May I rely on this formula being always correct?

像素* DisplayMetrics.density = DIP

pixels * DisplayMetrics.density = dip

有没有效用函数的某处Android的转换？

Is there a utility function for the conversion somewhere in Android?

推荐答案

有内置现有的工具方法称为TypedValue.applyDimensions(int,浮动，DisplayMetrics） 才会这样。

There is an existing utility method built called TypedValue.applyDimensions(int, float, DisplayMetrics) that does this.

下面是如何使用它：

// returns the number of pixels for 123.4dip
int value = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 
                     (float) 123.4, getResources().getDisplayMetrics());

还有其他类型的列表，你可以用它包括使用 COMPLEX_UNIT_SP ， COMPLEX_UNIT_PT 页面中所有发现我挂上面。如果排除了（INT）类型转换，你会得到的浮点数。

There's a list of other types that you can use with it including COMPLEX_UNIT_SP, COMPLEX_UNIT_PT all found in the page I linked above. If you exclude the (int) typecast, you'll get the floating point number.

我遇到同样的问题，发现这个通过围绕code戳。

I encountered the same problem and found this through poking around the code.