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：

<?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>

其次是在anim中定义动画：

slide_left_in.xml：

<?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>

slide_left_out.xml：

<?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>

slide_right_in.xml：

<?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>

slide_right_out.xml：

<?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>

最后是Activity中的实现：

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);   } }

希望本文所述对大家Android程序设计有所帮助。