how can we use animation if i want one image after another image 
i had some code but it is not working 

```
Context mContext;
 protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.animationdemo);
     Resources res = mContext.getResources();
     TransitionDrawable transition = (TransitionDrawable) res.getDrawable(R.drawable.transitiondrawable);
     ImageView image = (ImageView) findViewById(R.id.imgView);
     image.setImageDrawable(transition);
     transition.startTransition(1000);
 }

```

and made one xml file transitiondrawable.xml file into drawable folder

```
<transition xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:drawable="@drawable/endoscope_"/>
  <item android:drawable="@drawable/endoscope_2"/>
</transition>

```

and one layout file animationdemo.xml

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

<ImageView
 android:id="@+id/imgView"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content">
 </ImageView>
</LinearLayout>

```

please give me idea where i m wrong