android:gravity 属性是对该view或者Container中内容的限定.比如一个Button 上面的text. 你可以设置该text 相对于Button的靠左,靠右等位置.还比如一个LinearLayout中的Button,可以设置gravity来改变Button的相对于Container的靠左,靠右等位置。

android:layout_gravity是用来设置该view相对与父view (Container)的位置.比如一个button 在linearlayout里,你想把该button放在linearlayout里靠左、靠右等位置就可以通过该属性设置.

使用layout_gravity应该注意:

当作为父layout的LinearLayout的属性为android:orientation="vertical" 也就是父layout为纵向排列时android:layout_gravity设为横向的时候才能生效。比如设置为:left,right,center_horizontal等;


当作为父layout的LinearLayout的属性为android:orientation="horizental" 也就是父layout为横向排列时android:layout_gravity设为纵向的时候才能生效。比如设置为:top,bottom,center_vertical等;

基本选项值:

Value

Description
top Put the object at the top of its container, not changing its size.
将对象放在其容器的顶部,不改变其大小.
bottom Put the object at the bottom of its container, not changing its size.
将对象放在其容器的底部,不改变其大小.
left Put the object at the left edge of its container, not changing its size.
将对象放在其容器的左侧,不改变其大小.
right Put the object at the right edge of its container, not changing its size.
将对象放在其容器的右侧,不改变其大小.
center_vertical Place object in the vertical center of its container, not changing its size.
将对象纵向居中,不改变其大小.
垂直对齐方式:垂直方向上居中对齐。
fill_vertical Grow the vertical size of the object if needed so it completely fills its container.
必要的时候增加对象的纵向大小,以完全充满其容器.
垂直方向填充
center_horizontal Place object in the horizontal center of its container, not changing its size.
将对象横向居中,不改变其大小.
水平对齐方式:水平方向上居中对齐
fill_horizontal Grow the horizontal size of the object if needed so it completely fills its container.
必要的时候增加对象的横向大小,以完全充满其容器.
水平方向填充
center Place the object in the center of its container in both the vertical and horizontal axis, not changing its size.
将对象横纵居中,不改变其大小.
fill Grow the horizontal and vertical size of the object if needed so it completely fills its container. This is the default.
必要的时候增加对象的横纵向大小,以完全充满其容器.
clip_vertical Additional option that can be set to have the top and/or bottom edges of the child clipped to its container's bounds. The clip is based on the vertical gravity: a top gravity clips the bottom edge, a bottom gravity clips the top edge, and neither clips both edges.

附加选项,用于按照容器的边来剪切对象的顶部和/或底部的内容. 剪切基于其纵向对齐设置:顶部对齐时,剪切底部;底部对齐时剪切顶部;除此之外剪切顶部和底部.

垂直方向裁剪

clip_horizontal Additional option that can be set to have the left and/or right edges of the child clipped to its container's bounds. The clip is based on the horizontal gravity: a left gravity clips the right edge, a right gravity clips the left edge, and neither clips both edges.

附加选项,用于按照容器的边来剪切对象的左侧和/或右侧的内容. 剪切基于其横向对齐设置:左侧对齐时,剪切右侧;右侧对齐时剪切左侧;除此之外剪切左侧和右侧.

水平方向裁剪

更多相关文章

  1. Android(安卓)Drawable Resources系列8:
  2. Android(安卓)相对布局:RelativeLayout
  3. android开启线程的误区
  4. Android与HTML JavaScript交互
  5. android launcher 分析
  6. 比較具体的handle机制
  7. Android(安卓)Handler 用法
  8. android XMl 解析神奇xstream 四: 将复杂的xml文件解析为对象
  9. Android应用程序与SurfaceFlinger服务的连接过程分析

随机推荐

  1. android 退出activity
  2. android中LayoutAnimationController类的
  3. adroid单元测试
  4. android ps 命令执行后各项值的含义
  5. Android(安卓)覆盖AlertDialog里的按钮事
  6. android项目的出现小红叉,如何重构
  7. Android(安卓)5.1 Contacts源码分析(五):Peo
  8. 在mac上快速搭建Android、iOS自动打包环
  9. 在线简历
  10. Android的传感器