<TextView android:id="@+id/txt"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:scrollbars="vertical"
        android:singleLine="false"  
        android:maxLines="10"
        android:textSize="18sp"
        android:textColor="#ff0000"
        android:text="xxxxxx"
</TextView>

TextView textView = (TextView)findViewById(R.id.txt);
textView.setMovementMethod(ScrollingMovementMethod.getInstance());