Hello 帧动画

       帧动画即把每张静态图片都收集起来，然后由android来控制依次显示这些静态图片，然后利用人眼视觉暂留的原理，给用户造成“动画”的错觉。简而言之让图片动起来

好了，直接上代码

实现方式一：通过xml文件

          1、在/res/drawable目录下，定义一个逐帧动画的资源文件

<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/push_down_1"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_down_2"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_down_3"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_down_4"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_down_5"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_down_6"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_down_7"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_down_8"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_down_9"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_down_10"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_up_1"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_up_2"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_up_3"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_up_4"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_up_5"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_up_6"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_up_7"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_up_8"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_up_9"
        android:duration="50"/>
    <item
        android:drawable="@drawable/push_up_10"
        android:duration="50"/>

</animation-list>

   2、在布局文件中添加一个ImageView来显示每一帧图像。为了方便可以再添加两个按钮控制其播放和停止

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.newdegree.mytest.FatPoActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <Button
            android:id="@+id/play"
            android:text="开始"
            android:layout_weight="1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>

        <Button
            android:id="@+id/pause"
            android:text="暂停"
            android:layout_weight="1"
            android:layout_marginLeft="5dp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>

    </LinearLayout>

    <ImageView
        android:id="@+id/anim"
        android:src="@drawable/fat_po"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

</LinearLayout>

  3、在代码中引用

public class FatPoActivity extends AppCompatActivity {

    private Button btn_play,btn_pause;
    private ImageView iv;

    private AnimationDrawable anim;

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

        btn_play = (Button) findViewById(R.id.play);
        btn_pause = (Button) findViewById(R.id.pause);
        iv = (ImageView) findViewById(R.id.anim);

        iv.setImageResource(R.drawable.fat_po);
        anim = (AnimationDrawable) iv.getDrawable();

        btn_play.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                anim.start();
            }
        });

        btn_pause.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                anim.stop();
            }
        });
    }
}

实现方式二:通过Java代码控制每一帧图片（播放/暂停的调用和上面一样）

		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);

 

（夜深了，有点不走心了，若有bug，欢迎大神砸砖）