アニメーション--ListViewリストitemが1つずつ出てくる(無から有まで)

 1 import android.app.ListActivity;  2 import android.os.Bundle;  3 import android.widget.ArrayAdapter;  4 

 5 public class MainActivity extends ListActivity {  6     private ArrayAdapter<String> adapter;  7  @Override  8     protected void onCreate(Bundle savedInstanceState) {  9         super.onCreate(savedInstanceState); 10  setContentView(R.layout.main); 11 

12         adapter = new ArrayAdapter<String>(this, 13                 android.R.layout.simple_list_item_1, new String[] { "Hello", 14                         "World", "www.baidu.com" }); 15 

16  setListAdapter(adapter); 17  } 18 }

 1 <?xml version="1.0" encoding="utf-8"?>

 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

 3  android:layout_width="match_parent"

 4  android:layout_height="match_parent"

 5  android:orientation="vertical" >

 6     <ListView  7         android:id="@android:id/list"

 8  android:layout_width="fill_parent"

 9  android:layout_height="fill_parent"

10  android:layoutAnimation="@anim/listview_anim" />

11 </LinearLayout>

1 <?xml version="1.0" encoding="utf-8"?> 2 <layoutAnimation xmlns:android="http://schemas.android.com/apk/res/android" 3  android:animation="@anim/scale_0_1" 4  android:delay="0.5" > 5 </layoutAnimation> 6 <!-- 7  android:delay   （ ) 8 -->

 1 <?xml version="1.0" encoding="utf-8"?>  2 <!--  3  == scale   ==  4  fromXScale,fromYScale，  X,Y ，0.0 ， 1.0   5  toXScale，toYScale，  ， 1.0 ， 1.0   6  android:duration    7 -->  8 <scale xmlns:android="http://schemas.android.com/apk/res/android"  9  android:fromXScale="0" 10  android:toXScale="1" 11  android:fromYScale="0" 12  android:toYScale="1" 13  android:duration="1000" />

14 

15 <!-- 

16  alpha   17  scale   18  translate   19  rotate   20 -->