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LayoutAnimation干嘛用的？不知道的话网上搜一下。
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);
.......private int duration=1000; private Animation push_left_in,push_right_in; private Animation slide_top_to_bottom,slide_bottom_to_top; public ListViewAdapter(ArrayListlist) { 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); }........@Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub ViewHodler 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.xmlpush_right_in.xml
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.xmlslide_top_to_bottom.xml
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; } }}