概述：将Animation应用于activity里的每一个控件，实现漂亮的动画效果
一、什么是LayoutAnimationController
1、LayoutAnimationController用于为layout里面的每一个空间或者ViewGroup里面的控件设置动画效果
2、每一个空间都有相同的动画效果
3、这些动画效果在不同的时间显示出来
4、LayoutAnimationController可以再xml文件中实现，也可以在代码中实现
5、在xml文件中使用LayoutAnimationController
（1）在res/anim文件中创造一个xml文件list_anim_layout.xml
xmlns:android=""
//设置动作时间
android:delay = "1"
//设置每个控件出现的顺序
android:animationOrder = "random"
//设置动画配置文件
android:animation = "@anim/list_anim"
/>
（2）在布局文件中为控件添加配置
//设置配置文件
android:layoutAnimation="@anim/list_anim_layout"
6、在代码中使用LayoutAnimationController
（1）创造一个Animation对象
通过装载xml文件创造，或者通过构造函数创造
（2）使用下列代码创造LayoutAnimationController
LayoutAnimationController lac = new LayoutAnimationController(animation)
（3）设置控件的显示顺序
lac.setOrder(LayoutAnimationController.ORDER_RANDOM)
（4）为控件设置LayoutAnimationController属性
listview.setLayoutAnimation(lac)
二、什么是AnimationListener
1、AnimationListener是一个监听器
2、这个监听器在动画执行的各个阶段都会得到通知，从而调用相应的方法
3、主要包含下面2个方法
onAnimationEnd(animation) //动画效果结束时执行
onAnimationRepeat(animation) //动画效果重复时执行
onAnimationStart(animation) //动画效果开始时执行
三、源代码
MainAcvitity.java 主程序
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public class MainActivity extends ListActivity
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{
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private Button addBtn = null;
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private Button removeBtn = null;
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private ListView listView = null;
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private ViewGroup viewGroup = null;
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protected void onCreate(Bundle savedInstanceState)
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{
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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addBtn = (Button)findViewById(R.id.addBtn);
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removeBtn = (Button)findViewById(R.id.removeBtn);
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listView = getListView();
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viewGroup = (ViewGroup)findViewById(R.id.layoutId);
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addBtn.setOnClickListener(new btnListener());
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removeBtn.setOnClickListener(new btnListener());
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}
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private ListAdapter listAdapter()
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{
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//创造一个list
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List<HashMap<String, String>> list = new ArrayList<HashMap<String, String>>();
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//生成HashMap
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HashMap<String, String> map1 = new HashMap<String, String>();
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HashMap<String, String> map2 = new HashMap<String, String>();
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HashMap<String, String> map3 = new HashMap<String, String>();
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//为每一个HashMap添加键值对
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map1.put("user_name", "张三");
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map1.put("user_sex", "男");
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map2.put("user_name", "李四");
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map2.put("user_sex", "男");
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map3.put("user_name", "王五");
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map3.put("user_sex", "女");
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//将HashMap添加到list
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list.add(map1);
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list.add(map2);
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list.add(map3);
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//生成adapter
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SimpleAdapter simpleAdapter = new SimpleAdapter(this, list, R.layout.item,
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new String[]{"user_name", "user_sex"}, new int[]{R.id.user_name, R.id.user_sex});
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return simpleAdapter;
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}
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class btnListener implements OnClickListener
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{
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@Override
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public void onClick(View v)
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{
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switch(v.getId())
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{
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// TODO Auto-generated method stub
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case R.id.addBtn:
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listView.setAdapter(listAdapter());
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//创造一个Animation对象
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Animation animation = (Animation)AnimationUtils.loadAnimation(MainActivity.this, R.anim.list_anim);
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//使用下列代码创造LayoutAnimationController
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LayoutAnimationController lac = new LayoutAnimationController(animation);
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//设置控件的显示顺序
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lac.setOrder(LayoutAnimationController.ORDER_RANDOM);
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//为listview设置LayoutAnimationController属性
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listView.setLayoutAnimation(lac);
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break;
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case R.id.removeBtn:
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//设置淡出效果
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AlphaAnimation alphaAnimation = new AlphaAnimation(1.0f, 0.0f);
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//持续时间3s
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alphaAnimation.setDuration(3000);
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//为Animation设置监听器
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alphaAnimation.setAnimationListener(new animationListener());
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//启动效果
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listView.startAnimation(alphaAnimation);
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break;
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default:
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break;
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}
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}
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}
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class animationListener implements AnimationListener
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{
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@Override
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public void onAnimationEnd(Animation animation)
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{
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// TODO Auto-generated method stub
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//移除控件
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viewGroup.removeView(listView);
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}
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@Override
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public void onAnimationRepeat(Animation animation)
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{
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// TODO Auto-generated method stub
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}
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@Override
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public void onAnimationStart(Animation animation)
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{
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// TODO Auto-generated method stub
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}
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}
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@Override
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public boolean onCreateOptionsMenu(Menu menu)
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{
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// Inflate the menu; this adds items to the action bar if it is present.
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getMenuInflater().inflate(R.menu.main, menu);
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return true;
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}
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}
list_animation_layout.xml animation设置文件
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<?xml version="1.0" encoding="utf-8"?>
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<layoutAnimation
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xmlns:android=""
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android:delay = "1"
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android:animationOrder = "random"
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android:animation = "@anim/list_anim"
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/>
list_animation.xml animation动画文件
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<?xml version="1.0" encoding="utf-8"?>
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<set
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xmlns:android=""
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android:interpolator="@android:anim/accelerate_interpolator">
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<alpha
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android:fromAlpha="0.1"
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android:toAlpha="1.0"
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android:duration="3000"
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android:startOffset="500"
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/>
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</set>
四、布局文件
activity_main.xml activity布局文件
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<LinearLayout
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xmlns:android=""
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xmlns:tools=""
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android:id="@+id/layoutId"
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android:layout_width="fill_parent"
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android:layout_height="fill_parent"
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android:orientation="vertical"
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>
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<ListView
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android:id="@id/android:list"
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android:layout_width="fill_parent"
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android:layout_height="wrap_content"
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android:scrollbars="vertical"
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android:layoutAnimation="@anim/list_anim_layout"
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/>
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<Button
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android:id="@+id/addBtn"
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android:layout_width="fill_parent"
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android:layout_height="wrap_content"
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android:text="addButton"
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/>
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<Button
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android:id="@+id/removeBtn"
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android:layout_width="fill_parent"
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android:layout_height="wrap_content"
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android:text="removeButton"
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/>
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</LinearLayout>
item.xml list控件布局文件
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<?xml version="1.0" encoding="utf-8"?>
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<LinearLayout xmlns:android=""
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:orientation="horizontal"
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android:padding="10dip" >
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<TextView
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android:id="@+id/user_name"
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android:layout_width="30dip"
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android:layout_height="wrap_content"
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android:singleLine="true"
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/>
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<TextView
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android:id="@+id/user_sex"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:gravity="right"
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/>
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</LinearLayout>
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