测试drawable animation

public class DAActivity extends Activity implements OnClickListener {

    private ImageView iv_da_mm;
    private Button btn_da_start;
    private Button btn_da_stop;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_animation_da);
        iv_da_mm = (ImageView) findViewById(R.id.iv_da_mm);
        btn_da_start = (Button) findViewById(R.id.btn_da_start);
        btn_da_stop = (Button) findViewById(R.id.btn_da_stop);

        btn_da_start.setOnClickListener(this);
        btn_da_stop.setOnClickListener(this);
    }

    private AnimationDrawable animationDrawable;
    @Override
    public void onClick(View v) {
        if (v == btn_da_start) {
            if(animationDrawable==null) {
                //得到背景动画图片对象
                animationDrawable = (AnimationDrawable) iv_da_mm.getBackground();
                //启动
                animationDrawable.start();
            }
            
        } else if (v == btn_da_stop) {
            if(animationDrawable!=null) {
                animationDrawable.stop();
                animationDrawable = null;
            }
        }
    }
}

drawable_animation_test.xml

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

    <item
        android:drawable="@drawable/nv1"
        android:duration="500"/>
    <item
        android:drawable="@drawable/nv2"
        android:duration="500"/>
    <item
        android:drawable="@drawable/nv3"
        android:duration="500"/>
    <item
        android:drawable="@drawable/nv4"
        android:duration="500">
    </item>

</animation-list>

activity_animation_da.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/iv_da_mm"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="160dp"
        android:background="@drawable/drawable_animation_test"/>

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true" >

        <Button
            android:id="@+id/btn_da_start"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="启动动画" />
        
        <Button
            android:id="@+id/btn_da_stop"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="结束动画" />
    </LinearLayout>

</RelativeLayout>