ObjectAnimator属性动画应用demo

感谢慕课网--eclipse_xu

布局文件：activity_main.xml

 1 <FrameLayout 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     tools:context="com.example.animationapp.MainActivity" >
 6 
 7     <ImageView
 8         android:id="@+id/im0"
 9         android:layout_width="wrap_content"
10         android:layout_height="wrap_content"
11         android:paddingLeft="3dp"
12         android:paddingTop="3dp"
13         android:src="@drawable/b" />
14 
15     <ImageView
16         android:id="@+id/im1"
17         android:layout_width="wrap_content"
18         android:layout_height="wrap_content"
19         android:paddingLeft="3dp"
20         android:paddingTop="3dp"
21         android:src="@drawable/c" />
22 
23     <ImageView
24         android:id="@+id/im2"
25         android:layout_width="wrap_content"
26         android:layout_height="wrap_content"
27         android:paddingLeft="3dp"
28         android:paddingTop="3dp"
29         android:src="@drawable/d" />
30 
31     <ImageView
32         android:id="@+id/im3"
33         android:layout_width="wrap_content"
34         android:layout_height="wrap_content"
35         android:paddingLeft="3dp"
36         android:paddingTop="3dp"
37         android:src="@drawable/e" />
38 
39     <ImageView
40         android:id="@+id/im4"
41         android:layout_width="wrap_content"
42         android:layout_height="wrap_content"
43         android:paddingLeft="3dp"
44         android:paddingTop="3dp"
45         android:src="@drawable/f" />
46 
47     <ImageView
48         android:id="@+id/im5"
49         android:layout_width="wrap_content"
50         android:layout_height="wrap_content"
51         android:paddingLeft="3dp"
52         android:paddingTop="3dp"
53         android:src="@drawable/g" />
54 
55     <ImageView
56         android:id="@+id/im6"
57         android:layout_width="wrap_content"
58         android:layout_height="wrap_content"
59         android:paddingLeft="3dp"
60         android:paddingTop="3dp"
61         android:src="@drawable/h" />
62 
63     <ImageView
64         android:id="@+id/im7"
65         android:layout_width="wrap_content"
66         android:layout_height="wrap_content"
67         android:src="@drawable/a" />
68 
69 </FrameLayout>

View Code

图片资源

MainActivity.java

 1 package com.example.animationapp;
 2 
 3 import java.util.ArrayList;
 4 import java.util.List;
 5 
 6 import android.support.v7.app.ActionBarActivity;
 7 import android.animation.ObjectAnimator;
 8 import android.os.Bundle;
 9 import android.view.Menu;
10 import android.view.MenuItem;
11 import android.view.View;
12 import android.view.View.OnClickListener;
13 import android.view.animation.BounceInterpolator;
14 import android.widget.ImageView;
15 import android.widget.Toast;
16 
17 public class MainActivity extends ActionBarActivity implements OnClickListener {
18 
19     private int[] res = {R.id.im0, R.id.im1,R.id.im2,
20             R.id.im3,R.id.im4,R.id.im5,R.id.im6,R.id.im7}; 
21     
22     private List<ImageView>  list = new ArrayList<ImageView>(); 
23     
24     private boolean flag = true;
25     
26     @Override
27     protected void onCreate(Bundle savedInstanceState) {
28         super.onCreate(savedInstanceState);
29         setContentView(R.layout.activity_main);
30         
31         initView();
32     }
33 
34     private void initView() {
35         
36         for(int i = 0; i < res.length; i++){
37             ImageView im = (ImageView) findViewById(res[i]);
38             im.setOnClickListener(this);
39             list.add(im);
40         }
41     }
42 
43     @Override
44     public void onClick(View v) {
45         switch(v.getId()){
46         //im7最后布局，叠加在最上面
47         case R.id.im7:{
48             
49             if(flag){
50                 startAnimation();
51                 flag = false;
52             }else{
53                 closeAnimation();
54                 flag = true;
55             }
56             break;
57         }
58 
59         default:
60             Toast.makeText(MainActivity.this, v.getId()+"OK", Toast.LENGTH_SHORT).show();
61             break;
62         }
63     }
64 
65     private void closeAnimation() {
66         for(int i = 0 ;i<res.length-1; i++){
67             ObjectAnimator oa = ObjectAnimator.ofFloat(list.get(i),
68                     "translationY",i*200F, 0F );
69             oa.setDuration(100);    
70             //oa.setStartDelay(50*i);
71             oa.start();
72         }
73     }
74 
75     private void startAnimation() {
76         //此处只需要弹出其余7个图标，最上边的图标im7不动
77         for(int i = 0 ;i<res.length-1; i++){
78             //属性动画操作类
79             ObjectAnimator oa = ObjectAnimator.ofFloat(list.get(i),
80                     "translationY", 0F, i*200F);
81             oa.setDuration(200);
82             //oa.setInterpolator(new BounceInterpolator());
83             //oa.setStartDelay(200*i);
84             oa.start();
85         }
86     }
87     
88 }