Android动画之逐帧动画(FrameAnimation)详解

今天我们就来学习逐帧动画,废话少说直接上效果图如下:

帧动画的实现方式有两种：

一、在res/drawable文件夹下新建animation-list的XML实现帧动画

1、首先在res/drawable文件夹下添加img00-img24共25张图片

2、新建frame_anim.xml

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
    android:oneshot="true" >

    <!-- animation-list 帧动画 -->
    <!-- android:oneshot的值为 false代表播放多次，true代表只播放一次 -->
    <!-- duration代表每张图片的播放时间 ,定义一个持续时间为50毫秒的动画帧 -->
    <item
        android:drawable="@drawable/img00"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img01"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img02"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img03"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img04"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img05"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img06"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img07"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img08"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img09"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img10"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img11"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img12"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img13"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img14"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img15"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img16"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img17"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img18"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img19"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img20"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img21"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img22"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img23"
        android:duration="50"/>
    <item
        android:drawable="@drawable/img24"
        android:duration="50"/>

</animation-list>

3、在activity_main中添加控件

<RelativeLayout 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"
    tools:context="com.havorld.frameanimation.MainActivity" >

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true" />
    <!-- android:background="@drawable/frame_anim" -->

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:orientation="horizontal"
        android:padding="10dp" >

        <Button
            android:id="@+id/start"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="播放" />

        <Button
            android:id="@+id/stop"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="停止" />
    </LinearLayout>

</RelativeLayout>

4、在代码中获取并开启帧动画

public class MainActivity extends Activity implements OnClickListener {

    private ImageView imageView;
    private AnimationDrawable animationDrawable;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        imageView = (ImageView) findViewById(R.id.imageView);
        findViewById(R.id.start).setOnClickListener(this);
        findViewById(R.id.stop).setOnClickListener(this);

        setXml2FrameAnim1();
        // setXml2FrameAnim2();

    }

    /**
     * 通过XML添加帧动画方法一
     */
    private void setXml2FrameAnim1() {

        // 把动画资源设置为imageView的背景,也可直接在XML里面设置
        imageView.setBackgroundResource(R.drawable.frame_anim);
        animationDrawable = (AnimationDrawable) imageView.getBackground();
    }

    /**
     * 通过XML添加帧动画方法二
     */
    private void setXml2FrameAnim2() {

        // 通过逐帧动画的资源文件获得AnimationDrawable示例
        animationDrawable = (AnimationDrawable) getResources().getDrawable(
                R.drawable.frame_anim);
        imageView.setBackground(animationDrawable);
    }

    @Override
    public void onClick(View v) {

        switch (v.getId()) {
        case R.id.start:
            if (animationDrawable != null && !animationDrawable.isRunning()) {
                animationDrawable.start();
            }
            break;
        case R.id.stop:
            if (animationDrawable != null && animationDrawable.isRunning()) {
                animationDrawable.stop();
            }
            break;

        default:
            break;
        }
    }

}

二、通过代码实现帧动画

/**
 * 通过代码添加帧动画方法
 */
private void setSrc2FrameAnim() {

    animationDrawable = new AnimationDrawable();
    // 为AnimationDrawable添加动画帧
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img00), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img01), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img02), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img03), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img04), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img05), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img06), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img07), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img08), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img09), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img10), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img11), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img12), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img13), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img14), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img15), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img16), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img17), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img18), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img19), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img20), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img21), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img22), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img23), 50);
    animationDrawable.addFrame(
            getResources().getDrawable(R.drawable.img24), 50);
    // 设置为循环播放
    animationDrawable.setOneShot(false);
    imageView.setBackground(animationDrawable);
}

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