Animation frames in the res/drawable/ folder

wait.xml

<animation-list android:oneshot="false">
    <item android:drawable="@drawable/wait_0" android:duration="50" />
    <item android:drawable="@drawable/wait_1" android:duration="50" />
    <item android:drawable="@drawable/wait_2" android:duration="50" />
    <item android:drawable="@drawable/wait_3" android:duration="50" />
    <item android:drawable="@drawable/wait_4" android:duration="50" />
    <item android:drawable="@drawable/wait_5" android:duration="50" />
</animation-list>