Scale table layout according to screen orientation

I'm kind of lost in the assembly of my screens on Android, I'm not able to make the elements fit the dimensions of the screen. I put fill_parent in tablerows and elements inside it, but editTexts do not scale and they look like wrap_content , and when I turn the screen horizontally the layout occupy only part of the screen.

On the vertical screen I put values in width and it was nice but not automatic.

How do I make my layout fill the entire screen automatically?

The canvas vertically:

Thescreenishorizontal:

The layout code:

<TableLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content">

<TableRow
    android:id="@+id/tableRow1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" >

    <TextView 
        android:background="@drawable/borda"
        android:padding="5dp"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Atendimento:"/>

    <EditText
        android:background="@drawable/borda"
        android:padding="5dp"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:id="@+id/edtAtendimento"
        android:layout_width="155dp"
        android:layout_height="wrap_content"/>

    <TextView 
        android:background="@drawable/borda"
        android:padding="5dp"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Data/hora:"/>

    <EditText
        android:background="@drawable/borda"
        android:padding="5dp"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:id="@+id/edtDataHora"
        android:layout_width="160dp"
        android:layout_height="wrap_content"/>

</TableRow>