Xamarin.Android Designer在手机上显示控件的方式有所不同

Question

I am unable to setup Xamarin.Android Designer pretty well. In my previous version of Windows and Visual Studio the Xamarin Default designer view looked Fine, but after upgrading to VS2015 and Win10 , My Designer doesn't seem to be very well, As it's controls show differently on the designer and differently on my mobile phone. I am sharing two pictures of how it looks like on my phone and how it looks on Xamarin Designer.

In my Xamarin Designer:

In my Mobile Phone:

Please assist me regarding this issue, Thank you!

EDIT :
you won't be able to see the controls until you change their color if I choose the default theme of the designer.
Here it is how it looks when the default theme is selected

EDIT :
=> Here is my Main.axml file code.

<?xml version="1.0" encoding="utf-8"?>
  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:orientation="vertical"
      android:layout_width="fill_parent"
      android:weightSum="100"
      android:minWidth="25px"
      android:minHeight="25px"
      android:layout_height="fill_parent">
<TextView
    android:text="Create An Account"
    android:id="@+id/tvCreateAccount"
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:layout_weight="20"
    android:textColor="#368DEB"
    android:gravity="center"
    android:textStyle="bold"
    android:textSize="25sp"
    android:layout_width="match_parent"
    android:layout_height="0dp" />
<Button
    android:id="@+id/btnSignin"
    android:text="Sign in"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="15"
    android:background="@drawable/btnSignInStyle"
    android:layout_marginLeft="20dp"
    android:layout_marginRight="20dp"
    android:textSize="15sp" />
<TextView
    android:text="Or"
    android:id="@+id/tvOr"
    android:gravity="center"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="15"
    android:textColor="#000000" />
<Button
    android:id="@+id/btnSignup"
    android:text="Sign Up with Email"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="15"
    android:layout_marginLeft="20dp"
    android:layout_marginRight="20dp"
    android:textSize="15sp" />
<RelativeLayout
    android:id="@+id/relativeLayout"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="35"
    android:minWidth="25px"
    android:minHeight="25px">
         <ProgressBar
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_centerInParent="true"
             android:indeterminate="true"
             android:id="@+id/progressBar1" />
     </RelativeLayout>
 </LinearLayout>

=> Here is the xml File that I am assigning to btnSignin

<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:state_pressed="false">
     <layer-list>
       <item android:right="2dp" android:top="5dp">
         <shape>
           <corners android:radius="2dp"/>
           <solid android:color="#D6D6D6"/>
         </shape>
       </item>

       <item android:bottom="2dp" android:left="2dp">
         <shape>
           <gradient android:angle="270" android:endColor="#4A6EA9" android:startColor="#4A6EA9"/>
           <stroke android:width="1dp" android:color="#BABABA"/>
           <corners android:radius="4dp"/> 
           <padding android:left="10dp" android:right="10dp" android:top="10dp" android:bottom="10dp"/>
         </shape>
       </item>
     </layer-list>
   </item>
   <item android:state_pressed="true">
     <layer-list>
       <item android:right="2dp" android:top="5dp">
         <shape>
           <corners android:radius="2dp"/>
           <solid android:color="#D6D6D6"/>
         </shape>
       </item>
       <item android:bottom="2dp" android:left="2dp">
         <shape>
           <corners android:radius="4dp"/>
           <gradient android:angle="270" android:endColor="#7C97C1" android:startColor="#4A6EA9"/>
           <stroke android:width="1dp" android:color="#BABABA"/>
           <padding android:left="10dp" android:right="10dp" android:top="10dp" android:bottom="10dp"/>
         </shape>
       </item>
     </layer-list>
   </item>
 </selector>

Answer 1

After doing all sort of work arounds I finally Solved my Problem. What I did was downloaded the latest community version of Visual Studio 2015, and the Default Xamarin packages that were pre-installed in Visual Studio were not good for the health of my system. I just visited the Xamarin Site and downloaded the Xamarin components from there. and It installed other features plus the new Xamarin for VS2015, And now working it's fine on Xamarin Studio and on Visual Studio also!