在谈这个之前先啰嗦几个概念。

基线：书写英语单词时为了规范书写会设有四条线，从上至下第三条就是基线。基线对齐主要是为了两个控件中显示的英文单词的基线对齐，如下所示：

　　

Start：在看API的时候经常会有Start对齐，End对齐，Start对齐主要是为了能够在不同的textDirection（文本排列方向）的时候更好的对齐的一种方式，在textDirection为LTR（从左到右）时Start对齐就等于左对齐，当textDirection为RTL（从右到左）时Start对齐就等于右对齐。End同理。

文本对齐

　　通过gravity来实现view的文本对齐方式.先看下官方解释。

　　android:gravity：Specifies how to align the text by the view's x- and/or y-axis when the text is smaller than the view.

Must be one or more (separated by '|') of the following constant values.

　　意思是说，当文本比view小的时候指定如何通过view的x、y轴线去对齐。这个属性的值必须是下面给出的一个或多个，如果是多个则用'|'隔开。

　　可以用的属性有：top、bottom、left、right、center_vertical、fill_vertical、center_horizontal、fill_horizontal、center、fill、clip_vertical、clip_horizontal、start、end

　　这些属性中就谈两类，其他的类似，一个是上下左右这种基本类型的，还有一种是组合的，比如左下角，这是为:left|bottom。

　　左对齐：

　　

 <TextView

         android:layout_width="100dip"

         android:layout_height="60dip"

         android:layout_marginTop="10dip"

         android:background="#ffff33"

         android:gravity="left"

         android:text="left"

 />

　　左下角：

  <TextView

         android:layout_width="100dip"

         android:layout_height="60dip"

         android:layout_marginTop="10dip"

         android:background="#ffff33"

         android:gravity="left|bottom"

         android:text="leftbottom"

  />

　　效果图如下所示：

　　aaarticlea/png;base64,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" alt="" />

LinearLayout对齐

　　gravity：Specifies how an object should position its content, on both the X and Y axes, within its own bounds.

Must be one or more (separated by '|') of the following constant values.

　　　　意思是，规定了一个对象以什么样的方式根据x、y轴去摆放自己的内容。这个属性的值必须是下面给出的一个或多个，如果是多个则用'|'隔开。

　　　　可以用的属性有：top、bottom、left、right、center_vertical、fill_vertical、center_horizontal、fill_horizontal、center、fill、clip_vertical、clip_horizontal、start、end。

　　　　同样，这些属性中就谈两类，其他的类似，一个是上下左右这种基本类型的，还有一种是组合的，比如左上角，这是为:left|bottom。

　　居右对齐：

　　

 <LinearLayout

         android:layout_width="match_parent"

         android:background="#0000ff"

         android:layout_height="0dip"

         android:gravity="right"

         android:layout_weight="1" >

         <Button

             android:layout_height="wrap_content"

             android:layout_width="wrap_content"

             android:text="right"

             />

 </LinearLayout>

　　居左下角对齐：

 <LinearLayout

         android:layout_width="match_parent"

         android:background="#ffff33"

         android:layout_height="0dip"

         android:layout_marginTop="10dip"

         android:gravity="left|bottom"

         android:layout_weight="1" >

          <Button

             android:layout_height="wrap_content"

             android:layout_width="wrap_content"

             android:text="left_bottom"

             />

 </LinearLayout>

　　效果图如下：

　　aaarticlea/png;base64,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" alt="" />

RelativeLayout对象

　　RelativeLayout主要用到相对位置的对齐，主要属性有以下几种

　　

layout_above

该布局文件的底部设置到指定ID的对象的上方
layout_below

layout_alignBaseline

该布局文件的基线与指定ID的对象的基线对齐

layout_alignBottom

将该布局文件的底部域指定的ID的对象的底部对齐

layout_alignLeft

layout_alignRight
layout_alignTop

layout_alignStart

该布局文件的开始（左边）与指定ID对象的开始（左边）位置对齐

layout_alignEnd

该布局文件的结束（右边）与指定ID对象的结束（右边）位置对齐

layout_toLeftOf

该布局文件的右边放到指定ID对象的左边
类似：layout_toStartOf

layout_toRightOf

该布局文件的左边放到指定ID对象的右边

layout_centerHorizontal

如果设置为true，则将该布局文件中的自对象设置为水平居中
layout_centerInParent
layout_centerVertical

layout_alignParentLeft

如果设置为true，则将该布局文件的左边与其父对象的左边对齐
layout_alignParentRight
layout_alignParentStart
layout_alignParentTop

layout_alignParentEnd

layout_alignParentBottom

　　拿出两个例子来简单说明下，一个是将一个button放到另一个button右边，另外一个是将一个button放到另一个button的右下角

　　右边：

　　

  <RelativeLayout

         android:layout_width="match_parent"

         android:layout_height="wrap_content" >

         <Button

             android:id="@+id/btnStand"

             android:layout_width="wrap_content"

             android:layout_height="wrap_content"

             android:text="标准物1" />

         <Button

             android:layout_width="100dip"

             android:layout_height="wrap_content"

             android:layout_toRightOf="@id/btnStand"

             android:text="right->标准物1" />

  </RelativeLayout>

　　右下角：

 <RelativeLayout

         android:layout_width="match_parent"

         android:layout_height="wrap_content" >

         <Button

             android:id="@+id/btnStand2"

             android:layout_width="wrap_content"

             android:layout_height="wrap_content"

             android:text="标准物2" />

         <Button

             android:layout_width="100dip"

             android:layout_height="wrap_content"

             android:layout_below="@id/btnStand2"

             android:layout_toRightOf="@id/btnStand2"

             android:text="right_bottom->标准物2" />

 </RelativeLayout>

　　效果图如下所示：

aaarticlea/png;base64,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" alt="" />

后记：

　　这次谈的内容比较粗，仅作抛砖引玉用。

原文连接：http://www.cnblogs.com/luoaz/p/3719767.html

Demo下载地址：https://github.com/xiaoai-opensource/alignDemo

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