android Animations 动画效果(四)

1.LayoutAnimationController的使用方法

什么是LayoutAnimationController

1.LayoutAnimationController用于为一个layout里面的控件，或者是一个

ViewGroup里面的控件设置动画效果

2.每一个控件都有相同的动画效果

3.这些控件的动画效果在不同的时间显示出来

4.LayoutAnimationController可以在xml文件中设置，也可以在代码中设置

2.ListView与Animations结合使用

在代码中使用LayoutAnimationController

1.创建一个Animation对象：

可以通过装载xml文件，或者直接使用Animation的构造函数创建Animation对象

2使用如下代码创建LayoutAnimationController对象：

LayoutAnimationController lac = new LayoutAnimationController

（animation）；

3.设置控件显示顺序：

lac.serOrder(LayoutAnimationController.ORDER_NORMAL)

4.为ListView设置LayoutAnimationController属性：

listView.setLayoutAnimation(lac);

MainActivity.java

package com.yx.animations04;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import com.yx.animations04.R;

import android.os.Bundle;

import android.app.Activity;

import android.app.ListActivity;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.animation.AccelerateDecelerateInterpolator;

import android.view.animation.AlphaAnimation;

import android.view.animation.Animation;

import android.view.animation.AnimationSet;

import android.view.animation.AnimationUtils;

import android.view.animation.LayoutAnimationController;

import android.view.animation.RotateAnimation;

import android.view.animation.ScaleAnimation;

import android.view.animation.TranslateAnimation;

import android.widget.Button;

import android.widget.ImageView;

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);



button = (Button) findViewById(R.id.buttonId);

button.setOnClickListener(new buttonListener());



listView = getListView();

}

private ListAdapter buildListAdapter(){

List<HashMap<String,String>> list = new ArrayList<HashMap<String,String>>();

HashMap<String,String> m1 = new HashMap<String, String>();

m1.put("name", "张三");

m1.put("gender","女");



HashMap<String,String> m2 = new HashMap<String, String>();

m2.put("name", "李四");

m2.put("gender","女");



HashMap<String,String> m3 = new HashMap<String, String>();

m3.put("name", "王五");

m3.put("gender","男");



list.add(m1);

list.add(m2);

list.add(m3);



SimpleAdapter simpleAdapter = new SimpleAdapter(MainActivity.this, list,

R.layout.item, new String[]{"name","gender"}, new int[]{R.id.name,R.id.gender});

return simpleAdapter;

}



private class buttonListener implements OnClickListener{

@Override

public void onClick(View v) {

listView.setAdapter(buildListAdapter());



//在代码中实现，这里不需要list_anim_layout.xml文件

Animation animation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.list_anim);

LayoutAnimationController lac = new LayoutAnimationController(animation);

lac.setOrder(LayoutAnimationController.ORDER_NORMAL);

listView.setLayoutAnimation(lac);

}

}

}

list_anim_layout.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/list_anim"

>



</layoutAnimation>

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">

<alpha android:fromAlpha="1.0"

android:toAlpha="0.0"

android:duration="2000"></alpha>

</set>

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

tools:context=".MainActivity" >

<!-- 使用配置文件

<ListView

android:id="@id/android:list"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:scrollbars="vertical"

android:layoutAnimation="@anim/list_anim_layout"

></ListView>

-->



<ListView

android:id="@id/android:list"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:scrollbars="vertical"

></ListView>



<Button

android:id="@+id/buttonId"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_alignParentBottom="true"

android:text="测试动画效果"

/>

</LinearLayout>

item.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="horizontal" >



<TextView

android:id="@+id/name"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

/>

<TextView

android:id="@+id/gender"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

/>

</LinearLayout>