android中的动画之布局动画

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <set xmlns:android="http://schemas.android.com/apk/res/android">
 3     <scale 
 4         android:duration="300"
 5         android:fromXScale="0.0"
 6         android:fromYScale="0.0"
 7         android:toYScale="1.0"
 8         android:toXScale="1.0"
 9         android:pivotX="50%"
10         android:pivotY="50%"
11         />
12 
13 </set>

 1  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2     xmlns:tools="http://schemas.android.com/tools"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical"
 6     tools:context="com.example.Tween_Animation.Alpha_MainActivity" >
 7 
 8     <Button
 9         android:id="@+id/button_scale"
10         android:layout_width="fill_parent"
11         android:layout_height="wrap_content"
12         android:text="@string/button_stringScaleAnimation" />
13 
14     <LinearLayout
15         android:gravity="center"
16         android:layout_width="fill_parent"
17         android:layout_height="fill_parent"
18         android:orientation="vertical" >
19 
20         <ImageView
21             android:id="@+id/imageview_scale"
22             android:layout_width="wrap_content"
23             android:layout_height="wrap_content"
24             android:src="@drawable/ic_launcher" />
25     </LinearLayout>
26 
27 </LinearLayout>

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical" >
 6     <ListView 
 7         android:id="@+id/listview"
 8         android:layout_width="fill_parent"
 9         android:layout_height="wrap_content"
10         />
11 
12 </LinearLayout>

 1 package com.example.Layout_Animation;
 2 
 3 import com.example.androidanimation.R;
 4 
 5 import android.app.Activity;
 6 import android.content.Intent;
 7 import android.os.Bundle;
 8 import android.view.View;
 9 import android.view.View.OnClickListener;
10 import android.widget.Button;
11 
12 public class MainActivity extends Activity implements OnClickListener{
13     private Button button = null;
14     protected void onCreate(Bundle savedInstanceState) {
15         super.onCreate(savedInstanceState);
16         setContentView(R.layout.activity_main);
17         button = (Button) findViewById(R.id.button_scale);
18         button.setOnClickListener(this);
19     }
20     public void onClick(View v) {
21         Intent intent = new Intent(MainActivity.this,MainActivity2.class);
22         startActivity(intent);
23     }
24 }

 1 package com.example.Layout_Animation;
 2 
 3 import com.example.androidanimation.R;
 4 
 5 import android.app.Activity;
 6 import android.os.Bundle;
 7 import android.view.animation.AnimationUtils;
 8 import android.view.animation.LayoutAnimationController;
 9 import android.widget.ArrayAdapter;
10 import android.widget.ListView;
11 
12 public class MainActivity2 extends Activity{
13     private ListView listview = null;
14     private ArrayAdapter<String> arrayadapter = null;
15     protected void onCreate(Bundle savedInstanceState) {
16         super.onCreate(savedInstanceState);
17         setContentView(R.layout.main2);
18         listview = (ListView) findViewById(R.id.listview);
19         String string[] = new String[20];
20         arrayadapter = new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1, get_array(string));
21         listview.setAdapter(arrayadapter);
22         //创建一个LayoutAnimationController的对象
23         LayoutAnimationController lac = new LayoutAnimationController(AnimationUtils.loadAnimation(this, R.anim.scale));
24         //设置每个子控件动画播放的顺序(中间计算了每个子控件的动画显示时间的)
25         /*
26          * 从安卓api中可以看出，有3个参数供选择
27          * ORDER_NORMAL--顺序显示
28          * ORDER_RANDOM--随机显示
29          * ORDER_REVERSE--倒叙显示
30          */
31         lac.setOrder(LayoutAnimationController.ORDER_RANDOM);
32         listview.setLayoutAnimation(lac);
33     }
34     private String [] get_array(String string[])
35     {
36         for(int i = 0; i < 20; i++)
37         {
38             string[i] = "小米" + (i + 1);
39         }
40         return string;
41     }
42 }