<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        >

        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="fill_parent"
            android:layout_height="50dp"
            >

            <ImageView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/ivLogo"
                android:src="@drawable/logo_final"
                android:contentDescription="@string/logo_final" />
        </LinearLayout>

        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="fill_parent"
            android:layout_height="60dp">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/tvZahl1"
                android:id="@+id/tvZahl1" />

            <EditText
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:id="@+id/etZahl1"
                android:hint="@string/etZahl1"
                android:numeric="decimal"
                android:focusable="true"
                android:singleLine="true"
                android:imeOptions="actionNext"/>
        </LinearLayout>

        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="fill_parent"
            android:layout_height="60dp">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/tvZahl2"
                android:id="@+id/tvZahl2" />

            <EditText
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:id="@+id/etZahl2"
                android:hint="@string/etZahl2"
                android:numeric="decimal"
                android:focusable="true"
                android:singleLine="true"
                android:imeOptions="actionDone"/>
        </LinearLayout>

        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="fill_parent"
            android:layout_height="60dp"
            style="?android:attr/buttonBarStyle"
           >

            <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/btAddieren"
                android:id="@+id/btAddieren"
                android:layout_weight="1"
                android:gravity="center"
                style="?android:attr/buttonBarButtonStyle"
                android:background="#ff0c77c9"
                android:textColor="#ff000000" />

            <View
                android:layout_width="10dp"
                android:layout_height="wrap_content"
                android:background="#ffffffff"
                />

            <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/btSubtrahieren"
                android:id="@+id/btSubtrahieren"
                android:layout_weight="1"
                android:gravity="center"
                style="?android:attr/buttonBarButtonStyle"
                android:background="#ff0c77c9"
                android:textColor="#ff000000" />
        </LinearLayout>

        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="fill_parent"
            android:layout_height="60dp"
            style="?android:attr/buttonBarStyle"
            >

            <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/btMultiplizieren"
                android:id="@+id/btMultiplizieren"
                android:layout_weight="1"
                android:gravity="center"
                style="?android:attr/buttonBarButtonStyle"
                android:background="#ff0c77c9"
                android:textColor="#ff000000" />

            <View
                android:layout_width="10dp"
                android:layout_height="wrap_content"
                android:background="#ffffffff"
                />

            <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="@string/btDividieren"
                android:id="@+id/btDividieren"
                style="?android:attr/buttonBarButtonStyle"
                android:textColor="#ff000000"
                android:background="#ff0c77c9" />
        </LinearLayout>

        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceLarge"
                android:id="@+id/tvErgebnis"
                android:hint="@string/tvErgebnis"
                android:gravity="center"
                android:textColor="#ffff2b30" />
        </LinearLayout>

    </LinearLayout>

</RelativeLayout>
