动画帧实现方法一

主xml中

<ImageView android:id="@+id/imgFrame" android:layout_width="60dip"
            android:layout_height="60dip" android:layout_alignParentLeft="true"
            android:layout_alignParentBottom="true" android:background="@anim/my_frame_bubble" />

动画：anim/myframe_bubble

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:apk="http://schemas.android.com/apk/res/android" apk:oneshot="false">
    <item apk:drawable="@drawable/bubble1" apk:duration="500" />
    <item apk:drawable="@drawable/bubble2" apk:duration="500" />    
</animation-list>

主程序中：

// ***动画帧
        this.imgFrame = (ImageView) super.findViewById(R.id.imgFrame);
        this.animFrame = (AnimationDrawable) this.imgFrame.getBackground();

        this.animFrame.stop();
        this.animFrame.start();