本文实例讲述了android编程之线性布局linearlayout用法。分享给大家供大家参考,具体如下:
线性布局(linearlayout)
可以让它的子元素垂直或水平的方式排成一行(不设置方向的时候默认按照垂直方向排列)。
下面示例是在别人基础上修改的main.xml:
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<?xml version= "1.0" encoding= "utf-8" ?>
<linearlayout xmlns:android= "http://schemas.android.com/apk/res/android"
android:layout_width= "fill_parent"
android:layout_height= "fill_parent"
android:orientation= "vertical" >
<linearlayout
android:orientation= "horizontal"
android:layout_width= "fill_parent"
android:layout_height= "wrap_content"
android:baselinealigned= "false"
android:layout_weight= "1" >
<linearlayout
android:orientation= "horizontal"
android:layout_width= "wrap_content"
android:layout_height= "fill_parent"
android:layout_weight= "1" >
<textview
android:text= "@string/color_green"
android:textcolor= "#ff0000"
android:background= "#00aa00"
android:layout_width= "wrap_content"
android:layout_height= "fill_parent"
android:layout_weight= "1" />
<textview
android:text= "@string/color_blue"
android:background= "#0000aa"
android:layout_width= "wrap_content"
android:layout_height= "fill_parent"
android:layout_weight= "1" />
</linearlayout>
<linearlayout
android:orientation= "vertical"
android:layout_width= "wrap_content"
android:layout_height= "fill_parent"
android:layout_weight= "1" >
<textview
android:text= "@string/color_black"
android:background= "#000000"
android:layout_width= "fill_parent"
android:layout_height= "wrap_content"
android:layout_weight= "1" />
<textview
android:text= "@string/color_yellow"
android:background= "#aaaa00"
android:layout_width= "fill_parent"
android:layout_height= "wrap_content"
android:layout_weight= "1" />
<textview
android:text= "@string/color_unknown"
android:background= "#00aaaa"
android:layout_width= "fill_parent"
android:layout_height= "wrap_content"
android:layout_weight= "1" />
</linearlayout>
</linearlayout>
<linearlayout
android:orientation= "vertical"
android:layout_width= "fill_parent"
android:layout_height= "wrap_content"
android:layout_weight= "2" >
<textview
android:text= "@string/color_red"
android:gravity= "fill_vertical"
android:background= "#aa0000"
android:layout_width= "fill_parent"
android:layout_height= "wrap_content"
android:layout_weight= "2" />
<textview
android:text= "@string/color_white"
android:textcolor= "#ff0000"
android:background= "#ffffff"
android:layout_width= "fill_parent"
android:layout_height= "wrap_content"
android:layout_weight= "2" />
</linearlayout>
</linearlayout>
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string.xml
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<?xml version= "1.0" encoding= "utf-8" ?>
<resources>
<string name= "hello" >hello world, testabsolutelayoutactivity!</string>
<string name= "app_name" >testabsolutelayout</string>
<string name= "color_red" >red</string>
<string name= "color_green" >green</string>
<string name= "color_blue" >blue</string>
<string name= "color_white" >white</string>
<string name= "color_black" >black</string>
<string name= "color_yellow" >yellow</string>
<string name= "color_unknown" >unknown</string>
</resources>
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效果图如下:
常用的属性:
android:orientation:可以设置布局的方向
android:gravity:用来控制组件的对齐方式
layout_weight:控制各个组件在布局中的相对大小
希望本文所述对大家android程序设计有所帮助。