本文实例讲述了android中viewflipper的使用及设置动画效果。分享给大家供大家参考，具体如下：
说到左右滑动，其实实现左右滑动的方式很多，有viewpaer，自定义实现viewgroup，gallery等都可以达到这种效果。这里做下viewfliper实现左右滑动的效果。
会用到以下的技术：
1、viewflipper
2、gesturedetector
3、animation
主要是这三个类在起作用。
viewflipper，不妨把它看做一个容器吧，你可以把许多的view放在这个容器中，让它展示给用户，虽然它每次只展示一个view，我感觉它的用途更好是作为广告展示，比如类似购物网站那样的广告滚动展示。比如可以设置自动播放功能，就可以滚动广告了！
原理：向左向右滑动主要是依赖手势来控制，手势向右滑动就调用 viewflipper.shownext()方法，同理，向左滑动就会去调用viewflipper.showprevious()方法。
效果图如下：
接下来直接上代码：
首先在布局文件中添加viewflipper的标签：
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<?xml version="1.0" encoding="utf-8"?>
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/pattern1" >
<button
android:id="@+id/treasure_chest_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignparentright="true"
android:background="@drawable/treasure" />
<viewflipper
android:id="@+id/viewflipper"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@id/treasure_chest_btn" >
</viewflipper>
<button
android:id="@+id/garbage_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignparentleft="true"
android:layout_below="@id/viewflipper"
android:background="@drawable/garbage" />
</relativelayout>
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其次是在anim中定义动画：
slide_left_in.xml：
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<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<!--
画面转换位置移动动画效果
开始向左动画
fromxdelta ： 动画开始时 x坐标位置
toxdelta ：动画结束时 x坐标位置
duration ：动画持续时间
-->
<translate
android:duration="800"
android:fromxdelta="100%p"
android:toxdelta="0" />
</set>
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slide_left_out.xml：
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<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="800"
android:fromxdelta="0"
android:toxdelta="-100%p" />
</set>
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slide_right_in.xml：
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<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="800"
android:fromxdelta="-100%p"
android:toxdelta="0" />
</set>
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slide_right_out.xml：
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<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="800"
android:fromxdelta="0"
android:toxdelta="100%p" />
</set>
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最后是activity中的实现：
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package net.loonggg.demo.slider;
import android.app.activity;
import android.os.bundle;
import android.view.gesturedetector;
import android.view.gesturedetector.ongesturelistener;
import android.view.layoutinflater;
import android.view.motionevent;
import android.view.view;
import android.view.view.ontouchlistener;
import android.view.window;
import android.view.animation.animation;
import android.view.animation.animation.animationlistener;
import android.view.animation.animationset;
import android.view.animation.animationutils;
import android.widget.button;
import android.widget.imageview;
import android.widget.textview;
import android.widget.viewflipper;
public class mainactivity extends activity implements ongesturelistener,
ontouchlistener {
private gesturedetector detector;
private viewflipper myviewflipper;
private int[] imgs = { r.drawable.img0, r.drawable.img1, r.drawable.img2,
r.drawable.img3, r.drawable.img4, r.drawable.img5 };
private int displayedchildindex = 0;
private button treasure_btn;
private button garbage_btn;
@override
public void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
requestwindowfeature(window.feature_no_title);
setcontentview(r.layout.main);
myviewflipper = (viewflipper) findviewbyid(r.id.viewflipper);
treasure_btn = (button) findviewbyid(r.id.treasure_chest_btn);
garbage_btn = (button) findviewbyid(r.id.garbage_btn);
myviewflipper.setontouchlistener(this);
myviewflipper.setlongclickable(true);// 设置长按事件
// myviewflipper.setautostart(true);// 设置是否自动播放，默认不自动播放
detector = new gesturedetector(this);
addflipperview();
}
/**
* 向flipperview中动态添加view
*/
private void addflipperview() {
for (int i = 0; i < imgs.length; i++) {
view view = layoutinflater.from(this).inflate(
r.layout.myviewflipper, null);
textview title = (textview) view.findviewbyid(r.id.view_title);
title.settext("头像");
imageview iv = (imageview) view.findviewbyid(r.id.view_image);
iv.setbackgroundresource(imgs[i]);
myviewflipper.addview(view);
}
}
@override
public boolean ondown(motionevent e) {
return false;
}
@override
public void onshowpress(motionevent e) {
}
@override
public boolean onsingletapup(motionevent e) {
return false;
}
@override
public boolean onscroll(motionevent e1, motionevent e2, float distancex,
float distancey) {
return false;
}
@override
public void onlongpress(motionevent e) {
}
@override
public boolean onfling(motionevent e1, motionevent e2, float velocityx,
float velocityy) {
// 返回当前正在显示的子视图的索引
displayedchildindex = myviewflipper.getdisplayedchild();
final imageview iv = (imageview) myviewflipper.getchildat(
displayedchildindex).findviewbyid(r.id.view_image);
if (e2.getx() - e1.getx() >= 100 && e1.gety() - e2.gety() >= 100) {
animationset outanim = (animationset) animationutils.loadanimation(
this, r.anim.collect_treasure);
iv.startanimation(outanim);
outanim.setanimationlistener(new animationlistener() {
public void onanimationstart(animation animation) {
}
public void onanimationrepeat(animation animation) {
}
public void onanimationend(animation animation) {
shownextview();
animationset downanim = (animationset) animationutils
.loadanimation(mainactivity.this, r.anim.up_or_down);
treasure_btn.setanimation(downanim);
iv.clearanimation();
}
});
} else if (e1.getx() - e2.getx() >= 100 && e2.gety() - e1.gety() >= 100) {
animationset outanim = (animationset) animationutils.loadanimation(
this, r.anim.throw_garbage);
iv.startanimation(outanim);
outanim.setanimationlistener(new animationlistener() {
public void onanimationstart(animation animation) {
}
public void onanimationrepeat(animation animation) {
}
public void onanimationend(animation animation) {
shownextview();
animationset leftanim = (animationset) animationutils
.loadanimation(mainactivity.this,
r.anim.left_or_right);
garbage_btn.setanimation(leftanim);
iv.clearanimation();
}
});
} else if (e1.getx() - e2.getx() >= 100) {
shownextview();
} else if (e2.getx() - e1.getx() >= 100) {
showpreviousview();
}
return false;
}
private void showpreviousview() {
myviewflipper.setinanimation(animationutils.loadanimation(this,
r.anim.slide_right_in));
myviewflipper.setoutanimation(animationutils.loadanimation(this,
r.anim.slide_right_out));
myviewflipper.showprevious();
}
private void shownextview() {
myviewflipper.setinanimation(animationutils.loadanimation(this,
r.anim.slide_left_in));
myviewflipper.setoutanimation(animationutils.loadanimation(this,
r.anim.slide_left_out));
myviewflipper.shownext();
}
@override
public boolean ontouch(view v, motionevent event) {
return detector.ontouchevent(event);
}
}
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希望本文所述对大家android程序设计有所帮助。