ANDROID_MARS学习笔记_S02_011_ANIMATION_LayoutAnimationController

一、简介

二、代码
1.xml
(1)activity_main.xml

 <ListView
         android:id="@id/android:list"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:scrollbars="vertical"
         />
         <!-- android:layoutAnimation="@anim/list_anim_layout" -->

        <Button
         android:id="@+id/buttonId"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:text="测试"
         />

(2)item.xml

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent" android:layout_height="fill_parent"
     android:orientation="horizontal" android:paddingLeft="10dip"
     android:paddingRight="10dip" android:paddingTop="1dip"
     android:paddingBottom="1dip">

     <TextView android:id="@+id/user_name" android:layout_width="180dip"
         android:layout_height="30dip" android:textSize="5pt"
         android:singleLine="true"/>
     <TextView android:id="@+id/usr_gender" android:layout_width="fill_parent"
         android:layout_height="fill_parent" android:textSize="5pt"
         android:singleLine="true"/>
 </LinearLayout>

(3)res\anim\list_anim.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="0.0" android:toAlpha="1.0" android:duration="2000" />
 </set>

(3)res\anim\list_anim_layout.xml

 <?xml version="1.0" encoding="utf-8"?>
 <layoutAnimation xmlns:android="http://schemas.android.com/apk/res/android"
     android:delay="2"
     android:animationOrder="normal"
     android:animation="@anim/list_anim" />

2.java
(1)MainActivity.java

 package com.layoutanimationcontroller;

 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;

 import android.app.ListActivity;
 import android.os.Bundle;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.animation.Animation;
 import android.view.animation.AnimationUtils;
 import android.view.animation.LayoutAnimationController;
 import android.widget.Button;
 import android.widget.ListAdapter;
 import android.widget.ListView;
 import android.widget.SimpleAdapter;

 public class MainActivity extends ListActivity {

     private Button button = null;
     private ListView listView = null;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         listView = getListView();
         button = (Button)findViewById(R.id.buttonId);
         button.setOnClickListener(new ButtonListener());
     }

     class ButtonListener implements OnClickListener {
         @Override
         public void onClick(View v) {
             listView.setAdapter(buidListAdapter());
             Animation animation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.list_anim);
             LayoutAnimationController lac = new LayoutAnimationController(animation);
             lac.setOrder(LayoutAnimationController.ORDER_NORMAL);
             lac.setDelay(0.5f);
             listView.setLayoutAnimation(lac);
         }
     }

     private ListAdapter buidListAdapter() {
         List<HashMap<String,String>> list = new ArrayList<HashMap<String,String>>();
         HashMap<String, String> m1 = new HashMap<String,String>();
         m1.put("user_name", "张三");
         m1.put("user_gender", "女");

         HashMap<String, String> m2 = new HashMap<String, String>();
         m2.put("user_name", "李四");
         m2.put("user_gender", "女");

         HashMap<String, String> m3 = new HashMap<String, String>();
         m3.put("user_name", "王五");
         m3.put("user_gender", "男");

         list.add(m1);
         list.add(m2);
         list.add(m3);

         SimpleAdapter simpleAdapter = new SimpleAdapter(this, list, R.layout.item,
                 new String[] {"user_name", "user_gender"},
                 new int[] {R.id.user_name, R.id.usr_gender});
         return simpleAdapter;
     }
 }