unable to signature on the signature pad in the scroll view

[nitish-nanda]

In the small screen size, the signature is not added
but working fine in large screen size phone

-----scroll view start------

 <RelativeLayout
                        android:layout_width="match_parent"
                        android:layout_height="0dp"
                        android:layout_weight="1"
                        android:background="@color/white"
                        android:minHeight="400dp">

                        <com.williamww.silkysignature.views.SignaturePad
                            android:id="@+id/signature_pad"
                            android:layout_width="match_parent"
                            android:layout_height="match_parent"
                            android:background="@color/white"
                            app:penColor="@android:color/black" />

                        <TextView
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_centerHorizontal="true"
                            android:layout_marginTop="@dimen/ten"
                            android:text="Signature"
                            android:textColor="@color/view_color"
                            android:textSize="@dimen/text_min" />

                    </RelativeLayout>

 -----scroll view end------