LinearLayout中的layout_weight属性
布局LinearLayout代码
- <? xml version = "1.0" encoding = "utf-8" ?>
- < LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"
- android:orientation = "vertical"
- android:layout_width = "fill_parent"
- android:layout_height = "fill_parent"
- >
- < Button
- android:layout_width = "fill_parent"
- android:layout_height = "fill_parent"
- android:text = "Button1"
- android:background = "#008000"
- android:layout_weight = "0"
- />
- < Button
- android:layout_width = "fill_parent"
- android:layout_height = "fill_parent"
- android:text = "Button2"
- android:background = "#FFFF00"
- android:layout_weight = "0"
- />
- </ LinearLayout >
layout_weight属性如果没有设置，则默认为0.
按钮1：button1,绿色
按钮2：button2,黄色
下面以按钮1和按钮2的weight属性（layout_weight）的变化，分别进行记录。
这里测试的是垂直布局android:orientation="vertical"，所以针对组件的 android:layout_height属性；如果测试的水平布局，则需针对组件的 android:layout_width属性。
（一） android:layout_height = "fill_parent"
|
|
| button1(weight=0) button2(weight=0) | button1(weight=0) button2(weight=1) |
|
|
|
button1(weight=1) button2(weight=1) button1占1/2，button2占1/2 |
button1(weight=1) button2(weight=2) button1占2/3，button2占1/3 |
|
|
|
button1(weight=1) button2(weight=9) button1占9/10，button2占1/10 |
button1(weight=1) button2(weight=30) button1占30/31，button2占1/31 |
（二） android:layout_height = "wrap_content"
|
|
|
button1(weight=0) button2(weight=0) |
button1(weight=0) button2(weight=1) |
|
|
|
button1(weight=1) button2(weight=1) button1占1/2，button2占1/2 |
button1(weight=1) button2(weight=2) button1占1/3，button2占2/3 |
|
|
|
button1(weight=1) button2(weight=9)
|
button1(weight=1) button2(weight=30)
|
通过以上实验可知：
（一） android:layout_height = "fill_parent"
（二） android:layout_height = "wrap_content"
在（一）、（二）2种情况在相同的weight属性下呈现出正好相反的情况。
