drawable animation基础

动画配置
<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" />
</animation-list>

<ImageView
    android:id="@+id/iv_dv"
    android:layout_width=“80dp"
    android:layout_height=“80dp"
    android:layout_marginTop="160dp"
    android:background="@drawable/anim_da" />