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문자


ViewSwitcher

版本:Android 2.3 r1

结构

继承关系

public classViewSwitcherextendsViewAnimator

java.lang.Object

android.view.View

android.view.ViewGroup

android.widget.FrameLayout

android.widget.ViewAnimator

android.widget.ViewSwitcher

已知直接子类

ImageSwitcher,TextSwitcher

类概述

在两个视图间转换时显示动画,有一个可以创建这些视图的工厂类。你可以用工厂来创建这些视图,也可以自己创建。一个ViewSwitcher只允许包含两个子视图,且一次仅能显示一个。

(译者注:与ViewFlipper类相似,但该类不常用,常用其两个子类ImageSwitcher:转换图片时增加动画效果;TextSwitcher转换文字时增加动画效果;其实例见apidemosImageSwitcher实例和TextSwitcher实例

内部类

interfaceViewSwitcher.ViewFactory

在一个ViewSwitcher里创建视图

构造函数

publicViewSwitcher(Context context)

构造一个新的空的视图转换器(ViewSwitcher)

参数

context应用环境(译者注:应用程序上下文)

publicViewSwitcher(Context context, AttributeSet attrs)

构造一个指定上下文、属性集合的空的视图转换器(ViewSwitcher)

参数

context应用环境(译者注:应用程序上下文)

attrs属性集合

公共方法

public voidaddView(View child, int index, ViewGroup.LayoutParams params)

添加一个指定布局参数的子视图

参数

child添加的子视图

index添加的子视图的索引

params子视图的布局参数

异常

IllegalStateException如果切换器中已经包含了两个视图时。

public ViewgetNextView()

返回下一个要显示的视图

返回

视图切换之后将要显示出的下一个视图

public voidreset()

重置视图转换器(ViewSwitcher)来隐藏所有存在的视图,并使转换器达到一次动画都还没有播放的状态。

public voidsetFactory(ViewSwitcher.ViewFactory factory)

设置用来生成将在视图转换器中切换的两个视图的工厂。也可以调用两次addView(android.view.View, int, android.view.ViewGroup.LayoutParams)来替代使用工厂的方法。

参数

factory用来生成转换器内容的视图工厂

补充

文章精选

android UI ViewSwitcher的使用(续二)

Android: Don’t Overlook ViewSwitcher

Using a ViewSwitcher in your Android xml layouts


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