android视图组件容器组件与布局管理器LinearLayout

Android应用的所有UI组件都继承了View类，ViewGroup通常作为其他组件的容器使用。

ViewGroup是View的子类，ViewGroup中除了包含普通的View组件之外，还可以再次包含ViewGroup组件。

android视图组件容器组件与布局管理器LinearLayout
android常用布局：

1.linearLayout 线性布局

重要的方法和属性：

XML Attributes

Attribute Name	Related Method	Description
android:baselineAligned	setBaselineAligned(boolean)	When set to false, prevents the layout from aligning its children's baselines.
android:baselineAlignedChildIndex	setBaselineAlignedChildIndex(int)	When a linear layout is part of another layout that is baseline aligned, it can specify which of its children to baseline align to (that is, which child TextView).
android:gravity	setGravity(int)	Specifies how to place the content of an object, both on the x- and y-axis, within the object itself.
android:measureWithLargestChild		When set to true, all children with a weight will be considered having the minimum size of the largest child.
android:orientation	setOrientation(int)	Should the layout be a column or a row? Use "horizontal" for a row, "vertical" for a column.
android:weightSum		Defines the maximum weight sum.

android：gravity，设置布局管理器组件内的对其方式，支持top，right等，也可以是组合的，leftcenter_vertical等

android：orientation设置组件排列方式，水平和垂直排列

demo代码如下：

<?xml version="1.0" encoding="utf-8"?><LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_height="wrap_content"   android:orientation="vertical"   android:layout_width="fill_parent">  <TextView android:text="linearLayout测试"            android:paddingTop="20dip"             android:paddingBottom="20dip"            android:id="@+id/TextView01"             android:layout_width="fill_parent"            android:layout_height="wrap_content"             android:gravity="center"            android:soundEffectsEnabled="true" android:password="false"            android:textStyle="bold">   </TextView>      <LinearLayout       android:id="@+id/layout1"       android:gravity="center"       android:paddingBottom="20dip"       android:layout_width="fill_parent"       android:layout_height="wrap_content">           <TextView       android:id="@+id/txtName"       android:text="帐号"       android:minWidth="80dip"       android:gravity="center"       android:layout_width="wrap_content"       android:layout_height="wrap_content">        </TextView>     <EditText                android:id="@+id/edtName"              android:minWidth="120dip"             android:layout_width="fill_parent"       android:layout_height="wrap_content"     >     </EditText>   </LinearLayout>       <LinearLayout       android:id="@+id/layout2"       android:gravity="center"       android:layout_width="fill_parent"       android:layout_height="wrap_content">           <TextView       android:id="@+id/txtPsw"       android:minWidth="80dip"       android:gravity="center"       android:text="密码"       android:layout_width="wrap_content"       android:layout_height="wrap_content">        </TextView>     <EditText                android:id="@+id/edtPassword"              android:minWidth="120dip"             android:layout_width="fill_parent"       android:layout_height="wrap_content"     >     </EditText>   </LinearLayout>      <LinearLayout      android:id="@+id/layout3"      android:gravity="right"      android:layout_width="fill_parent"      android:layout_height="wrap_content"   >            <Button android:id="@+id/btnOk"        android:minWidth="70dip"        android:text="登录"        android:layout_width="wrap_content"        android:layout_height="wrap_content"      >      </Button>            <Button android:id="@+id/btnCancel"        android:minWidth="70dip"        android:text="取消"        android:layout_width="wrap_content"        android:layout_height="wrap_content"      >      </Button>   </LinearLayout></LinearLayout>

效果如下图所示：

android视图组件容器组件与布局管理器LinearLayout

注：LinearLayout 默认 android:orientation="horizontal"

转载请注明出处：http://kurting615.iteye.com/blog/1143635

更多相关文章

随机推荐