Android动画之LayoutAnimationController

LayoutAnimationController可以控制一组控件按照规定显示，有两种方法来实现

1.下面以XML文件实现，先在res下新建anim文件夹，新建一个文件alpha.xml

<?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>

然后新建一个文件layoutanimation.xml

<?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中使用下面代码

<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"/>

   

这样就完成了

2.代码实现

                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);

下面是显示的顺序

LayoutAnimationController.ORDER_NORMAL;    //顺序显示   LayoutAnimationController.ORDER_REVERSE;//反显示   LayoutAnimationController.ORDER_RANDOM//随机显示