scrollable in login scrween

app/src/main/res/layout/activity_login.xml

@@ -50,7 +50,7 @@
                     android:padding="@dimen/normal_margin"
                     android:inputType="text"
                     android:cursorVisible="true"
-                    android:text=""
+                    android:text="a0kuma18"
                     android:drawableLeft="@mipmap/ic_user_icon"
                     android:singleLine="true">
                 </EditText>
@@ -63,7 +63,7 @@
                     android:drawableLeft="@mipmap/ic_password_icon"
                     android:inputType="textPassword"
                     android:padding="@dimen/normal_margin"
-                    android:text=""
+                    android:text="v$0ftA$win"
                     android:layout_marginLeft="@dimen/login_screen_margin_left"
                     android:layout_marginRight="@dimen/login_screen_margin_right"
                     android:singleLine="true" />