Android動畫之LayoutAnimationController(五)

LayoutAnimationController可以控制一組控件按照規定顯示，有兩種方法來實現

1.下面以XML文件實現，先在res下新建anim文件夾，新建一個文件alpha.xml

[html]
<?xml version="1.0" encoding="utf-8"?> 
<set xmlns:android="http://schemas.android.com/apk/res/android" 
    android:interpolator="@android:anim/accelerate_interpolator" 
    android:shareInterpolator="true" 
    > 
    <alpha 
        android:fromAlpha="0" 
        android:toAlpha="1" 
        android:duration="3000" 
            /> 
</set> 

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/accelerate_interpolator"
    android:shareInterpolator="true"
    >
    <alpha
        android:fromAlpha="0"
        android:toAlpha="1"
        android:duration="3000"
            />
</set>
然後新建一個文件layoutanimation.xml

[html]
<?xml version="1.0" encoding="utf-8"?> 
<layoutAnimation 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:delay="0.5" 
    android:animationOrder="normal" 
    android:animation="@anim/alpha" 
    /> 

<?xml version="1.0" encoding="utf-8"?>
<layoutAnimation
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:delay="0.5"
    android:animationOrder="normal"
    android:animation="@anim/alpha"
    />
在listview中使用下面代碼

[html]
<ListView 
        android:id="@+id/listView1" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content"        
 android:layoutAnimation="@anim/layoutanimation"/> 

<ListView
        android:id="@+id/listView1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"      
 android:layoutAnimation="@anim/layoutanimation"/>

這樣就完成了

2.代碼實現

[java]
             AlphaAnimation alpha=new AlphaAnimation(0, 1); 
alpha.setDuration(3000); 
LayoutAnimationController lac=new LayoutAnimationController(alpha); 
lac.setOrder(LayoutAnimationController.ORDER_NORMAL); 
lv.setLayoutAnimation(lac); 

                  AlphaAnimation alpha=new AlphaAnimation(0, 1);
  alpha.setDuration(3000);
  LayoutAnimationController lac=new LayoutAnimationController(alpha);
  lac.setOrder(LayoutAnimationController.ORDER_NORMAL);
  lv.setLayoutAnimation(lac);
下面是顯示的順序

LayoutAnimationController.ORDER_NORMAL;    //順序顯示
  LayoutAnimationController.ORDER_REVERSE;//反顯示
  LayoutAnimationController.ORDER_RANDOM//隨機顯示