activity_main.xml < RelativeLayout xmlns:android = "http://schemas.android.com/apk/res/android" xmlns:tools = "http://schemas.android.com/tools" android:id = "@+id/rl" android:layout_width = "match_parent" android:layout_height = "match_parent" android:padding = "10dp" tools:context = ".MainActivity" android:background = "#40c7a2" > < Button android:id = "@+id/btn" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:text = "ListView Scroll To Bottom" /> < ListView android:id = "@+id/lv" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:layout_below = "@id/btn" /> </ RelativeLayout > MainAc