Android implements multiple image synthesis loading animation

public class MyProgressDialog extends ProgressDialog {
    private int procressLoadRes;
    private ImageView mImageView;
    private AnimationDrawable animationDrawable;

    public MyProgressDialog(Context context,int procressLoadRes) {
        super(context);
         = procressLoadRes;
    }

    public MyProgressDialog(Context context, int theme, int procressLoadRes) {
        super(context, theme);
         = procressLoadRes;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        (savedInstanceState);
        setContentView(.layout_progress);
        mImageView = (ImageView) findViewById();
        //Set animation background        (procressLoadRes);
        //Get the animation object, it must be after the previous step        animationDrawable = (AnimationDrawable) ();
        (new Runnable() {
            @Override
            public void run() {
                //Start the animation                ();
            }
        });
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:andro
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:background="@null">

    <ImageView
        android:
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</LinearLayout>

public class MainActivity extends AppCompatActivity {

    private Button button;
    private MyProgressDialog progressDialog;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        (savedInstanceState);
        setContentView(.activity_main);
        button = (Button) findViewById();
        //Pass in style and anim files        progressDialog = new MyProgressDialog(this,,);

        (new () {
            @Override
            public void onClick(View view) {
                ();
            }
        });
    }
}

<style name="dialog" parent="@android:style/">
        <!--frame-->
        <item name="android:windowFrame">@null</item>
        <!--Does it appearactivityAbove-->
        <item name="android:windowIsFloating">true</item>
        <!--translucent-->
        <item name="android:windowIsTranslucent">false</item>
        <!--Untitled-->
        <item name="android:windowNoTitle">true</item>
        <!--背景透明去掉背景色frame也就去掉了 -->
        <item name="android:windowBackground">@color/transparent</item> 
        <!--Vague-->
        <item name="android:backgroundDimEnabled">false</item>
    </style>

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:andro>
    <item android:drawable="@mipmap/loading1" android:duration="100"/>
    <item android:drawable="@mipmap/loading2" android:duration="100"/>
    <item android:drawable="@mipmap/loading3" android:duration="100"/>
    <item android:drawable="@mipmap/loading4" android:duration="100"/>
    <item android:drawable="@mipmap/loading5" android:duration="100"/>
    <item android:drawable="@mipmap/loading6" android:duration="100"/>
    <item android:drawable="@mipmap/loading7" android:duration="100"/>
    <item android:drawable="@mipmap/loading8" android:duration="100"/>
    <item android:drawable="@mipmap/loading9" android:duration="100"/>
    <item android:drawable="@mipmap/loading10" android:duration="100"/>
    <item android:drawable="@mipmap/loading11" android:duration="100"/>
    <item android:drawable="@mipmap/loading12" android:duration="100"/>
    <item android:drawable="@mipmap/loading13" android:duration="100"/>
    <item android:drawable="@mipmap/loading14" android:duration="100"/>
    <item android:drawable="@mipmap/loading15" android:duration="100"/>
    <item android:drawable="@mipmap/loading16" android:duration="100"/>
    <item android:drawable="@mipmap/loading17" android:duration="100"/>
    <item android:drawable="@mipmap/loading18" android:duration="100"/>
    <item android:drawable="@mipmap/loading19" android:duration="100"/>
    <item android:drawable="@mipmap/loading20" android:duration="100"/>
    <item android:drawable="@mipmap/loading21" android:duration="100"/>
    <item android:drawable="@mipmap/loading22" android:duration="100"/>
    <item android:drawable="@mipmap/loading23" android:duration="100"/>
    <item android:drawable="@mipmap/loading24" android:duration="100"/>
    <item android:drawable="@mipmap/loading25" android:duration="100"/>
    <item android:drawable="@mipmap/loading26" android:duration="100"/>
    <item android:drawable="@mipmap/loading27" android:duration="100"/>
    <item android:drawable="@mipmap/loading30" android:duration="100"/>
    <item android:drawable="@mipmap/loading31" android:duration="100"/>
    <item android:drawable="@mipmap/loading32" android:duration="100"/>
    <item android:drawable="@mipmap/loading33" android:duration="100"/>
    <item android:drawable="@mipmap/loading34" android:duration="100"/>
</animation-list>

<color name="transparent">#00ffffff</color>