ViewFlipper组件继承了ViewAnimator,它可以调用addView(View v)添加多个组件向ViewFlipper中添加多个组件之后，ViewFlipper可使用动画控制多个组件之间的切换效果

ViewAnimator是一个基类，它继承的是FrameLayout，因此可以将多个View组件“叠加”在一起，ViewAnimator额外增加的功能就是可以在View切换时表现出动画效果。

ViewFlipper继承了ViewAnimation，额外增加的新功能如下：

eg.自动播放的图片库

acitivity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.viewflippertest.MainActivity" >
     <!--  ViewFlipper组件，放了三个ImageView组件-->
    <ViewFlipper
        android:id="@+id/viewFlipper1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="80dp"
        android:layout_marginTop="34dp"
        android:flipInterval="1000" >

        <ImageView
            android:id="@+id/imageView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/bomb10" />

        <ImageView
            android:id="@+id/imageView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/bomb11" />

        <ImageView
            android:id="@+id/imageView3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/bomb12" />

    </ViewFlipper>

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_centerVertical="true"
        android:layout_marginLeft="32dp"
        android:onClick="prev"
        android:text="<" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_toRightOf="@+id/button1"
        android:onClick="auto"
        android:text="Auto" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/button2"
        android:layout_alignBottom="@+id/button2"
        android:layout_toRightOf="@+id/button2"
        android:onClick="next"
        android:text=">" />

</RelativeLayout>

MainActvity.java

package com.example.viewflippertest;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ViewFlipper;


public class MainActivity extends Activity {
     ViewFlipper cf;//ViewFlipper对象
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        cf=(ViewFlipper) findViewById(R.id.viewFlipper1);
    }
    //响应按钮函数
    public void prev(View v){
    	cf.setInAnimation(this,R.anim.slide_in_right);
    	cf.setOutAnimation(this,R.anim.slide_out_left);
    	
    	cf.showPrevious();
    	//停止切换
    	cf.stopFlipping();
    };
  //响应按钮函数
    public void auto(View v){
    	cf.setInAnimation(this,R.anim.slide_in_right);
    	cf.setOutAnimation(this,R.anim.slide_out_left);

    	cf.startFlipping();
    };
  //响应按钮函数
    public void next(View v){
    	cf.setInAnimation(this,R.anim.slide_in_left);
    	cf.setOutAnimation(this,R.anim.slide_out_right);
    	
    	cf.showNext();
    	//停止切换
    	cf.stopFlipping();
    };
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

slide_in_left.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- 设置从左边拖进来的动画
    android:duration指定动画持续时间  -->
	<translate
		android:fromXDelta="-100%p"
		android:toXDelta="0"
		android:duration="@android:integer/config_mediumAnimTime" />
</set>

slide_in_right.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- 设置从右边拖进来的动画
    android:duration指定动画持续时间  -->
	<translate
		android:fromXDelta="100%p"
		android:toXDelta="0"
		android:duration="@android:integer/config_mediumAnimTime" />
</set>

slide_out_left.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- 设置从左边拖出去的动画 
    android:duration指定动画持续时间 -->
	<translate
		android:fromXDelta="0"
		android:toXDelta="-100%p"
		android:duration="@android:integer/config_mediumAnimTime" />
</set>

slide_out_right.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- 设置从左边拖出去的动画 
    android:duration指定动画持续时间 -->
	<translate
		android:fromXDelta="0"
		android:toXDelta="100%p"
		android:duration="@android:integer/config_mediumAnimTime" />
</set>