representative_login_tab.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"

    android:background="@drawable/studentlogin"
    android:fitsSystemWindows="true">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:paddingLeft="24dp"
        android:paddingRight="24dp"
        android:paddingTop="56dp">

        <ImageView android:layout_width="wrap_content"
            android:layout_height="72dp"
            android:layout_gravity="center_horizontal"
            android:layout_marginBottom="24dp"
            android:src="@drawable/splash_icon" />
        <android.support.design.widget.TextInputLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="8dp"
            android:layout_marginTop="8dp">

            <EditText
                android:id="@+id/student_input_rollno"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:hint="Roll Number"
                android:inputType="textCapCharacters" />
        </android.support.design.widget.TextInputLayout>
        <android.support.design.widget.TextInputLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="8dp"
            android:layout_marginTop="8dp">
            <EditText android:id="@+id/student_input_password"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:hint="Password"
                android:inputType="textPassword"/>
        </android.support.design.widget.TextInputLayout>

        <android.support.v7.widget.AppCompatButton
            android:id="@+id/student_btn_login"

            android:layout_width="240dp"
            android:layout_height="wrap_content"
            android:layout_marginBottom="24dp"
            android:layout_marginLeft="50dp"
            android:layout_marginTop="24dp"
            android:background="@drawable/mybutton"
            android:padding="12dp"
            android:text="Login"
            android:textColor="@color/cardcolour"/>


        <TextView
            android:id="@+id/student_link_signup"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="24dp"
            android:gravity="center"
            android:text="No account yet? Create one"
            android:textColor="@color/cardcolour"
            android:textSize="16dip" />