Android利用ViewFlipper实现屏幕切换动画效果
1、屏幕切换指的是在同一个Activity内屏幕见的切换,最长见的情况就是在一个FrameLayout内有多个页面,比如一个系统设置页面;一个个性化设置页面。
2、介绍ViewFilpper类
ViewFlipper
extends ViewAnimator
java.lang.Object | |||||
↳ | android.view.View | ||||
↳ | android.view.ViewGroup | ||||
↳ | android.widget.FrameLayout | ||||
↳ | android.widget.ViewAnimator | ||||
↳ | android.widget.ViewFlipper |
Class Overview
Simple ViewAnimator
that will animate between two or more views that have been added to it. Only one child is shown at a time. If requested, can automatically flip between each child at a regular interval.
该类继承了Framelayout类,ViewAnimator类的作用是为FrameLayout里面的View切换提供动画效果。
该类有如下几个和动画相关的函数:
setInAnimation:设置View进入屏幕时候使用的动画,该函数有两个版本,一个接受单个参数,类型为android.view.animation.Animation;一个接受两个参数,类型为Context和int,分别为Context对象和定义Animation的resourceID。
setOutAnimation: 设置View退出屏幕时候使用的动画,参数setInAnimation函数一样。
showNext: 调用该函数来显示FrameLayout里面的下一个View。
showPrevious: 调用该函数来显示FrameLayout里面的上一个View。
3、首选看一下定义四个动画的xml文件:in_leftright.xml——从左到右进入屏幕
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<? xml version = "1.0" encoding = "utf-8" ?> < set xmlns:android = "http://schemas.android.com/apk/res/android" > < translate android:duration = "3000" android:fromXDelta = "-100%p" android:toXDelta = "0" /> </ set > |
out_leftright.xml——从左到右出去屏幕
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<? xml version = "1.0" encoding = "utf-8" ?> < set xmlns:android = "http://schemas.android.com/apk/res/android" > < translate android:duration = "3000" android:fromXDelta = "0" android:toXDelta = "100%p" /> </ set > |
in_rightleft.xml——从右到左进入屏幕
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<? xml version = "1.0" encoding = "utf-8" ?> < set xmlns:android = "http://schemas.android.com/apk/res/android" > < translate android:duration = "3000" android:fromXDelta = "100%p" android:toXDelta = "0" /> </ set > |
out_rightleft.xml——从右到左出去屏幕
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<? xml version = "1.0" encoding = "utf-8" ?> < set xmlns:android = "http://schemas.android.com/apk/res/android" > < translate android:duration = "3000" android:fromXDelta = "100%p" android:toXDelta = "0" /> </ set > |
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<? xml version = "1.0" encoding = "utf-8" ?> < LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android" android:layout_width = "fill_parent" android:layout_height = "fill_parent" android:orientation = "vertical" > < ViewFlipper android:id = "@+id/viewFlipper" android:layout_width = "fill_parent" android:layout_height = "fill_parent" > <!-- 第一个页面 --> < LinearLayout android:layout_width = "fill_parent" android:layout_height = "fill_parent" android:gravity = "center" > < ImageView android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:src = "@drawable/a1" /> </ LinearLayout > <!-- 第二个页面 --> < LinearLayout android:layout_width = "fill_parent" android:layout_height = "fill_parent" android:gravity = "center" > < ImageView android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:src = "@drawable/a2" android:gravity = "center" /> </ LinearLayout > <!-- 第三个页面 --> < LinearLayout android:layout_width = "fill_parent" android:layout_height = "fill_parent" android:gravity = "center" > < ImageView android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:src = "@drawable/a3" android:gravity = "center" /> </ LinearLayout > <!-- 第四个页面 --> < LinearLayout android:layout_width = "fill_parent" android:layout_height = "fill_parent" android:gravity = "center" > < ImageView android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:src = "@drawable/a4" android:gravity = "center" /> </ LinearLayout > </ ViewFlipper > </ LinearLayout > |
5、java代码实现:
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public class SwitchTest2Activity extends Activity { ViewFlipper viewFlipper = null ; float startX; public void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.main); init(); } private void init() { viewFlipper = (ViewFlipper) this .findViewById(R.id.viewFlipper); } public boolean onTouchEvent(MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: startX = event.getX(); break ; case MotionEvent.ACTION_UP: if (event.getX() > startX) { // 向右滑动 viewFlipper.setInAnimation( this , R.anim.in_leftright); viewFlipper.setOutAnimation( this , R.anim.out_leftright); viewFlipper.showNext(); } else if (event.getX() < startX) { // 向左滑动 viewFlipper.setInAnimation( this , R.anim.in_rightleft); viewFlipper.setOutAnimation( this , R.anim.out_rightleft); viewFlipper.showPrevious(); } break ; } return super .onTouchEvent(event); } } |
6、效果图:
在这里看不出效果图,我贴几张图片吧!!
![](https://images0.cnblogs.com/blog2015/556239/201505/280904319074858.png)
![](https://images0.cnblogs.com/blog2015/556239/201505/280904492511058.png)
![](https://images0.cnblogs.com/blog2015/556239/201505/280905023136080.png)