ListView,GridView之LayoutAnimation特殊动画的实现

LayoutAnimation干嘛用的？不知道的话网上搜一下。
Android的Animation之LayoutAnimation使用方法

有两种用法，我的通常写在代码中，像下面这样：

/** * Layout动画 *  * @return */protected LayoutAnimationController getAnimationController() {int duration=300;AnimationSet set = new AnimationSet(true);Animation animation = new AlphaAnimation(0.0f, 1.0f);animation.setDuration(duration);set.addAnimation(animation);animation = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0.0f,Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF,-1.0f, Animation.RELATIVE_TO_SELF, 0.0f);animation.setDuration(duration);set.addAnimation(animation);LayoutAnimationController controller = new LayoutAnimationController(set, 0.5f);controller.setOrder(LayoutAnimationController.ORDER_NORMAL);return controller;}

应用的时候只需这样：

listView = (ListView) findViewById(R.id.listView);listView.setLayoutAnimation(getAnimationController());adapter = new ListViewAdapter(stores);listView.setAdapter(adapter);

这样一个简单的LayoutAnimation就完成了。

别看到这里就以为文章就完了，以上都是些小玩意。呵呵，还有更厉害的！

你想设置更炫的动画吗？LayoutAnimation通常是Item一个一个的出现，有某种规律的。想让每个Item都有自己的动画吗？那就继续看下去。

.......private int duration=1000;private Animation push_left_in,push_right_in;private Animation slide_top_to_bottom,slide_bottom_to_top;public ListViewAdapter(ArrayList<Store> list) {this.list = list;push_left_in=AnimationUtils.loadAnimation(context, R.anim.push_left_in);push_right_in=AnimationUtils.loadAnimation(context, R.anim.push_right_in);slide_top_to_bottom=AnimationUtils.loadAnimation(context, R.anim.slide_top_to_bottom);slide_bottom_to_top=AnimationUtils.loadAnimation(context, R.anim.slide_bottom_to_top);}........@Overridepublic View getView(int position, View convertView, ViewGroup parent) {// TODO Auto-generated method stubViewHodler hodler;if (convertView == null) {hodler = new ViewHodler();convertView = LayoutInflater.from(context).inflate(R.layout.simple_item_7_for_main, null);........convertView.setTag(hodler);if (position % 2 == 0) {push_left_in.setDuration(duration);convertView.setAnimation(push_left_in);} else {push_right_in.setDuration(duration);convertView.setAnimation(push_right_in);}/*if(position==0){slide_bottom_to_top.setDuration(duration);convertView.setAnimation(slide_bottom_to_top);}else{slide_top_to_bottom.setDuration(duration);convertView.setAnimation(slide_top_to_bottom);}*/}else{hodler = (ViewHodler) convertView.getTag();}........return convertView;}

看见上面的动画设置了吗？将动画写在getView()中，这样可以设置很多不同的动画。其实这不属于LayoutAnimation的范畴了。
你可以试一下，如果设计好的话，可以有比LayoutAnimation更酷的效果。
我这里只试了两种效果。
下面是我的动画文件，共四个：
第一种效果：item分别从左右两侧滑入效果。
push_left_in.xml

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"><translate android:fromXDelta="-100%p" android:toXDelta="0" android:duration="300"/><alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="300" /></set>

push_right_in.xml

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"><translate android:fromXDelta="100%p" android:toXDelta="0" android:duration="300"/><alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="300" /></set>

第2种效果：第一个item从下往上滑入，其他Item从上往下滑入效果，这个效果如果单个Item比较高（height）的话效果非常酷（卡牛的老版本好像用的就是这种效果）。
slide_bottom_to_top.xml

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_interpolator">    <translate android:fromYDelta="100%" android:toXDelta="0" android:duration="300" />    <alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="300" /></set>

slide_top_to_bottom.xml

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_interpolator">    <translate android:fromYDelta="-100%" android:toXDelta="0" android:duration="300" />    <alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="300" /></set>

另外一篇：
这个不是我写的。
GridView的item从上下左右飞入

import java.util.Random;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.view.animation.Animation;import android.view.animation.TranslateAnimation;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.GridView;import android.widget.ImageView;public class ZdemoActivity extends Activity {  private GridView gv; private Button btn; private TranslateAnimation taLeft, taRight, taTop, taBlow; private int[] imgList = new int[15]; private MyAdapter mAdapter; private LayoutInflater mInflater; @Override public void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.main);  this.InitView();  this.InitAnima();  this.InitData(); } private void InitAnima() {  // TODO Auto-generated method stub  taLeft = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 1.0f,    Animation.RELATIVE_TO_PARENT, 0.0f,    Animation.RELATIVE_TO_PARENT, 0.0f,    Animation.RELATIVE_TO_PARENT, 0.0f);  taRight = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, -1.0f,    Animation.RELATIVE_TO_PARENT, 0.0f,    Animation.RELATIVE_TO_PARENT, 0.0f,    Animation.RELATIVE_TO_PARENT, 0.0f);  taTop = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 0.0f,    Animation.RELATIVE_TO_PARENT, 0.0f,    Animation.RELATIVE_TO_PARENT, 1.0f,    Animation.RELATIVE_TO_PARENT, 0.0f);  taBlow = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 0.0f,    Animation.RELATIVE_TO_PARENT, 0.0f,    Animation.RELATIVE_TO_PARENT, -1.0f,    Animation.RELATIVE_TO_PARENT, 0.0f);  taLeft.setDuration(1000);  taRight.setDuration(1000);  taTop.setDuration(1000);  taBlow.setDuration(1000); } private void InitData() {  // TODO Auto-generated method stub  for (int i = 0; i < 15; i++) {   imgList[i] = R.drawable.ic_launcher;  }  mAdapter = new MyAdapter();  gv.setAdapter(mAdapter); } private void InitView() {  // TODO Auto-generated method stub  gv = (GridView) findViewById(R.id.gridView1);  btn = (Button) findViewById(R.id.button1);  btn.setOnClickListener(new OnClickListener() {   @Override   public void onClick(View v) {    // TODO Auto-generated method stub    mAdapter = null;    mAdapter = new MyAdapter();    gv.setAdapter(mAdapter);    mAdapter.notifyDataSetChanged();   }  });  mInflater = (LayoutInflater) this    .getSystemService(Context.LAYOUT_INFLATER_SERVICE); } private class MyAdapter extends BaseAdapter {  @Override  public int getCount() {   // TODO Auto-generated method stub   return imgList.length;  }  @Override  public Object getItem(int position) {   // TODO Auto-generated method stub   return imgList[position];  }  @Override  public long getItemId(int position) {   // TODO Auto-generated method stub   return position;  }  @Override  public View getView(int position, View convertView, ViewGroup parent) {   // TODO Auto-generated method stub   ViewHolder holder = null;   if (convertView == null) {    convertView = mInflater.inflate(R.layout.item, null);    holder = new ViewHolder();    holder.image = (ImageView) convertView      .findViewById(R.id.imageView1);    convertView.setTag(holder);   } else {    holder = (ViewHolder) convertView.getTag();   }   int imgID = imgList[position];   holder.image.setImageResource(imgID);   Random ran = new Random();   int rand = ran.nextInt(4);   switch (rand) {   case 0:    convertView.startAnimation(taLeft);    break;   case 1:    convertView.startAnimation(taRight);    break;   case 2:    convertView.startAnimation(taTop);    break;   case 3:    convertView.startAnimation(taBlow);    break;   }   return convertView;  }  class ViewHolder {   public ImageView image;  } }}

Android LayoutAnimation使用及扩展
http://my.oschina.net/u/724985/blog/289123