安卓：想了解的android：layout_weight [英] Android: trying to understand android:layout_weight

问题描述

我试图将一个页面中的三个部分。我想这样做的百分比值，但不支持通过Android系统。相反，我必须使用的android：layout_weight 。但我很难理解它，得到它的权利。特别是如何实际尺寸被计算。有没有办法让一个百分比值（0..100％）在机器人：layout_weight

我经历了几例（见附件截图）来描述问题。彩色场均＆LT;的LinearLayout＆GT; 与安卓layout_height =FILL_PARENT，因为我想全屏是那些之间进行分配。

案例1

好，简单。每个＆LT;的LinearLayout＆GT; 获得33％

案例2

跌宕？第一个（黄色）＆LT;的LinearLayout＆GT; 完全消失？为什么呢？

案例3

再次迷茫。黄＆LT;的LinearLayout＆GT; 又回来了。然而，这两个第一＆LT;的LinearLayout＆GT; 与较重变得越来越小？这是怎么回事？

案例4

我完全不知道这一切背后的数学的。

解决方案

  

有没有办法得到一个百分比值（0..100％）出的android：layout_weight

当然。让他们加起来100。

有关你的百分比值，你想要的安卓：在的LinearLayout 个别项目layout_height 为 0px 。

I'm trying to divide a page in three parts. I'd like to do it in percentage values, however that is not supported by Android. Instead I have to use android:layout_weight. But I have a hard time understanding it and getting it right. Especially how the actual size gets calculated. Is there a way to get a percentage value (0..100%) out of android:layout_weight?

I went through a few cases (see attached screenshot) to describe the problems. The colored fields are all <LinearLayout> with android:layout_height="fill_parent", because I want the full screen to be divided between those.

Case 1

Okay, simple. Every <LinearLayout> gets 33%.

Case 2

Ups?! The first (yellow) <LinearLayout> disappears completely? Why?

Case 3

Confused again. The yellow <LinearLayout> is back. However, the two first <LinearLayout> with the heavier weight get smaller? What is going on?

Case 4

I have absolutely no idea what the maths behind all this is.

解决方案

Is there a way to get a percentage value (0..100%) out of android:layout_weight?

Sure. Make them add up to 100.

For your "percentage value", you want the android:layout_height of the individual items within the LinearLayout to be 0px.

这篇关于安卓：想了解的android：layout_weight的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！