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)resanimlist_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)resanimlist_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;
    }
}