Android开发之LayoutAnimation的基本使用

1 Reply

1、先看一张图

2、功能说明
2.1.1、Animation的基本使用参照：Android开发之Animation的基本使用；
2.1.2、ListView的基本使用参照：Android开发基础控件ListView的使用
2.2、ListView中各个单元格按顺序执行动画，使用xml实现；
2.3、基本实现步骤：先创建一个animation–>创建一个animation_layout–>绑定到listview上；
2.4、参考代码
list_anim.xml

1
2
3
4
5
6
7

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="2000">
    <alpha
        android:fromAlpha="0"
        android:toAlpha="1" />
</set>

list_anim_layout.xml

1
2
3
4
5

<?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" />

activity_main.xml

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

<?xml version="1.0" encoding="utf-8"?>
<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="com.yusian.layoutanimation.MainActivity">
 
    <ListView
        android:id="@+id/lv_main"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:layoutAnimation="@anim/list_anim_layout">
 
    </ListView>
    <Button
        android:id="@+id/btn_start_animation"
        android:layout_width="match_parent"
        android:layout_height="55dp"
        android:text="开始动画"/>
 
</LinearLayout>

One thought on “Android开发之LayoutAnimation的基本使用”

  1. Sian Post author

    使用代码实现动画即创建一个LayoutAnimationController对象，然后调用listView的setLayoutAnimation()方法及startLayoutAnimation()方法即可：
    Activity

    1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55

    package com.yusian.layoutanimation;
 
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.view.animation.LayoutAnimationController;
import android.widget.ListView;
import android.widget.SimpleAdapter;
 
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
 
public class MainActivity extends AppCompatActivity implements View.OnClickListener{
    private ListView listView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById(R.id.btn_start_animation).setOnClickListener(this);
        listView = (ListView) findViewById(R.id.lv_main);
        List<HashMap<String, String>> array = new ArrayList<>();
        HashMap map1 = new HashMap();
        map1.put("name", "张三");
        map1.put("sex", "男");
        HashMap map2 = new HashMap();
        map2.put("name", "李四");
        map2.put("sex", "女");
        HashMap map3 = new HashMap();
        map3.put("name", "王五");
        map3.put("sex", "男");
        array.add(map1);
        array.add(map2);
        array.add(map3);
 
        SimpleAdapter adapter = new SimpleAdapter(this,
                array, R.layout.listview_cell,
                new String[]{"name", "sex"},
                new int[]{R.id.tv_name, R.id.tv_sex});
        listView.setAdapter(adapter);
    }
 
    @Override
    public void onClick(View v) {
        Animation animation = AnimationUtils.loadAnimation(this,R.anim.list_anim);
        LayoutAnimationController lac = new LayoutAnimationController(animation);
        lac.setDelay(0.5f);
        lac.setOrder(LayoutAnimationController.ORDER_RANDOM);
        listView.setLayoutAnimation(lac);
        listView.startLayoutAnimation();
    }
}
    ↓

Leave a Reply