Thank you all for giving answer, here is how i solved it.
There is a property called android:maxLines=""
using this property we can add Read More text view below the text view by making it clickable so that when user clicks on the text view we can perform any action we wanted
Example:
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Device supports NFS etc....."
android:maxLines="4"
android:id="@+id/description" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Read More"
android:layout_gravity="center_horizontal"
android:textColor="#0066FF"
android:id="@+id/readmore" />
I hope this helps.