With
<com.agik.swipe_button.View.Swipe_Button_View
android:id="@+id/start"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/stop"
android:layout_marginTop="15dp"
app:sb_swipe_text="Start"
app:sb_swipe_animate_text="true"
android:layout_marginRight="16dp"
android:layout_marginLeft="16dp"
/>

faced error - Error inflating class com.agik.swipe_button.View.Swipe_Button_View
fixed with following change
<com.agik.AGIKSwipeButton.View.Swipe_Button_View
android:id="@+id/start"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/stop"
android:layout_marginTop="15dp"
app:sb_swipe_text="Start"
app:sb_swipe_animate_text="true"
android:layout_marginRight="16dp"
android:layout_marginLeft="16dp"/>