一.概述

今天来看看LayoutAnimation的使用，先看效果图

二.实现

新建一个动画文件

<layoutAnimation xmlns:android="http://schemas.android.com/apk/res/android"
    android:delay="30%"
    android:animationOrder="random"
    android:animation="@anim/slide_right"
    />

<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/linear_interpolator">
    <translate android:fromXDelta="100%p"
        android:toXDelta="0"
        android:duration="900"
        />
</set>

然后我们在布局文件的listview中使用

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    >
   <ListView
       android:id="@+id/listview"
       android:layout_width="match_parent"
       android:layoutAnimation="@anim/list_anim_layout"
       android:layout_height="match_parent"
       android:animateLayoutChanges="true"
       android:scrollbars="none"
       >
   </ListView>
</LinearLayout>

最后给出Java代码

public class MainActivity extends Activity {

    private ListView listView;
    private List data = new ArrayList();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        listView = (ListView) findViewById(R.id.listview);
        for (int i = 0;i<20;i++){
           data.add("杨幂"+i);
        }
        listView.setAdapter(new MyAdapter(this,R.layout.item1,R.id.text,data));
    }
    class MyAdapter extends ArrayAdapter<String>{
        public MyAdapter(Context context, int resource, int textViewResourceId, List<String> objects) {
            super(context, resource, textViewResourceId, objects);
        }
    }
}