android學習之Animation（四）---複雜Animation使用

概述：将Animation應用于activity裡的每一個控件，實作漂亮的動畫效果

一、什麼是LayoutAnimationController

    1、LayoutAnimationController用于為layout裡面的每一個空間或者ViewGroup裡面的控件設定動畫效果

    2、每一個空間都有相同的動畫效果

    3、這些動畫效果在不同的時間顯示出來

    4、LayoutAnimationController可以再xml檔案中實作，也可以在代碼中實作

    5、在xml檔案中使用LayoutAnimationController

    （1）在res/anim檔案中創造一個xml檔案list_anim_layout.xml

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

           //設定動作時間

           android:delay = "1"

           //設定每個控件出現的順序

           android:animationOrder = "random"

           //設定動畫配置檔案

           android:animation = "@anim/list_anim"

           />

    （2）在布局檔案中為控件添加配置

        //設定配置檔案

        android:layoutAnimation="@anim/list_anim_layout"

    6、在代碼中使用LayoutAnimationController

    （1）創造一個Animation對象

        通過裝載xml檔案創造，或者通過構造函數創造

    （2）使用下列代碼創造LayoutAnimationController

        LayoutAnimationController lac = new LayoutAnimationController(animation)

    （3）設定控件的顯示順序

        lac.setOrder(LayoutAnimationController.ORDER_RANDOM)

    （4）為控件設定LayoutAnimationController屬性

        listview.setLayoutAnimation(lac)

二、什麼是AnimationListener

    1、AnimationListener是一個監聽器

    2、這個監聽器在動畫執行的各個階段都會得到通知，進而調用相應的方法

    3、主要包含下面2個方法

        onAnimationEnd(animation)       //動畫效果結束時執行

        onAnimationRepeat(animation) //動畫效果重複時執行

        onAnimationStart(animation) //動畫效果開始時執行

三、源代碼  

    MainAcvitity.java    主程式   

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public class MainActivity extends ListActivity

{

    private Button addBtn = null;

    private Button removeBtn = null;

    private ListView listView = null;

    private ViewGroup viewGroup = null;

    protected void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        addBtn = (Button)findViewById(R.id.addBtn);

        removeBtn = (Button)findViewById(R.id.removeBtn);

        listView = getListView();

        viewGroup = (ViewGroup)findViewById(R.id.layoutId);

        addBtn.setOnClickListener(new btnListener());

        removeBtn.setOnClickListener(new btnListener());

    }

    private ListAdapter listAdapter()

        //創造一個list

        ListHashMapString, String>> list = new ArrayListHashMapString, String>>();

        //生成HashMap

        HashMapString, String> map1 = new HashMapString, String>();

        HashMapString, String> map2 = new HashMapString, String>();

        HashMapString, String> map3 = new HashMapString, String>();

        //為每一個HashMap添加鍵值對

        map1.put("user_name", "張三");

        map1.put("user_sex", "男");

        map2.put("user_name", "李四");

        map2.put("user_sex", "男");

        map3.put("user_name", "王五");

        map3.put("user_sex", "女");

        //将HashMap添加到list

        list.add(map1);

        list.add(map2);

        list.add(map3);

        //生成adapter

        SimpleAdapter simpleAdapter = new SimpleAdapter(this, list, R.layout.item,

                new String[]{"user_name", "user_sex"}, new int[]{R.id.user_name, R.id.user_sex});

        return simpleAdapter;

    class btnListener implements OnClickListener

        @Override

        public void onClick(View v)

        {

            switch(v.getId())

            {

            // TODO Auto-generated method stub

                case R.id.addBtn:

                    listView.setAdapter(listAdapter());

                    //創造一個Animation對象

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

                    //使用下列代碼創造LayoutAnimationController

                    LayoutAnimationController lac = new LayoutAnimationController(animation);

                    //設定控件的顯示順序

                    lac.setOrder(LayoutAnimationController.ORDER_RANDOM);

                    //為listview設定LayoutAnimationController屬性

                    listView.setLayoutAnimation(lac);

                    break;

                case R.id.removeBtn:

                    //設定淡出效果

                    AlphaAnimation alphaAnimation = new AlphaAnimation(1.0f, 0.0f);

                    //持續時間3s

                    alphaAnimation.setDuration(3000);

                    //為Animation設定監聽器

                    alphaAnimation.setAnimationListener(new animationListener());

                    //啟動效果

                    listView.startAnimation(alphaAnimation);

                default:

            }

        }

    class animationListener implements AnimationListener

        public void onAnimationEnd(Animation animation)

            //移除控件

            viewGroup.removeView(listView);

        public void onAnimationRepeat(Animation animation)

        public void onAnimationStart(Animation animation)

    @Override

    public boolean onCreateOptionsMenu(Menu menu)

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

}

    list_animation_layout.xml    animation設定檔案

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

layoutAnimation

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

    android:delay = "1"

    android:animationOrder = "random"

    android:animation = "@anim/list_anim"

    />

    list_animation.xml              animation動畫檔案

set

    android:interpolator="@android:anim/accelerate_interpolator">

    alpha

        android:fromAlpha="0.1"

        android:toAlpha="1.0"

        android:duration="3000"

        android:startOffset="500"

        />

/set>

四、布局檔案

    activity_main.xml                activity布局檔案

LinearLayout

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

    android:id="@+id/layoutId"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

     android:orientation="vertical"

    >

    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"

     />

    Button

     android:id="@+id/addBtn"

     android:text="addButton"

     android:id="@+id/removeBtn"

     android:text="removeButton"

/LinearLayout>

    item.xml                            list控件布局檔案

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

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="horizontal"

    android:padding="10dip" >

    TextView

        android:id="@+id/user_name"

        android:layout_width="30dip"

        android:layout_height="wrap_content"

        android:singleLine="true"

        android:id="@+id/user_sex"

        android:layout_width="wrap_content"

        android:gravity="right"