disapp/app/src/main/res/layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:ads="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <include layout="@layout/item_toolbar" />

    <FrameLayout
        android:id="@+id/framelayout_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <WebView
            android:id="@+id/webView_content"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:visibility="invisible" />


        <include layout="@layout/view_loading"/>


        <RelativeLayout
            android:id="@+id/dashboard"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="#203140"
            android:visibility="visible"
            android:gravity="center_horizontal"
            >

            <Button
                style="?android:attr/borderlessButtonStyle"
                android:id="@+id/MailBtn"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#ffffff"
                android:layout_weight="1"
                android:text="@string/action_mail"
                android:layout_marginTop="50dp"
                android:drawableTop="@drawable/ic_mail"
                />

            <Button
                style="?android:attr/borderlessButtonStyle"
                android:id="@+id/PadBtn"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#ffffff"
                android:layout_weight="1"
                android:text="@string/action_pad"
                android:layout_marginTop="50dp"
                android:drawableTop="@drawable/ic_pad"
                android:layout_toRightOf="@+id/DiasporaBtn"/>

            <Button
                style="?android:attr/borderlessButtonStyle"
                android:id="@+id/DiasporaBtn"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#ffffff"
                android:layout_weight="1"
                android:text="@string/action_diaspora"
                android:layout_marginTop="50dp"
                android:drawableTop="@drawable/ic_diaspora"
                android:layout_toRightOf="@+id/MailBtn"/>
            <Button
                style="?android:attr/borderlessButtonStyle"
                android:id="@+id/AboudBtn"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#ffffff"
                android:layout_weight="1"
                android:text="@string/action_about"
                android:layout_marginTop="50dp"
                android:drawableTop="@drawable/ic_about"
                android:layout_toRightOf="@+id/PadBtn"/>

        </RelativeLayout>

    </FrameLayout>

</LinearLayout>