Center Align Table + Buttons

I want this to work on all screen sizes so I don't think using padding is the best way to solve this. I can centre everything when it is in vertical but when it is horizontal nothing seems to align...

<LinearLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" 
android:orientation = "horizontal"
android:layout_gravity = "center">

<TableLayout
    android:layout_height = "wrap_content"
    android:layout_width="wrap_content"
    android:gravity = "center" 
    android:layout_gravity="center_horizontal">
    <TableRow 
    android:id="@+id/tableRow1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content">
        <TextView 
        android:textSize="24.5sp" 
        android:id="@+id/textView1" 
        android:layout_height="wrap_content" 
        android:gravity="center" 
        android:layout_marginBottom="20dip" 
        android:text="Bubb" 
        android:layout_width="wrap_content">
        </TextView>
    </TableRow>
    <TableRow android:baselineAligned="false">
        <Button
        android:id = "@+id/continue_button"
        android:background="@drawable/and_button" 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingLeft = "@dimen/pad_horizontal"
        android:paddingRight = "@dimen/pad_horizontal"
        android:paddingTop = "@dimen/pad_vertical"
        android:paddingBottom = "@dimen/pad_vertical"
        android:text = "@string/first_label" 
        android:layout_margin="@dimen/margin"/>
    </TableRow>
    <TableRow>
        <Button
        android:id = "@+id/new_button"
        android:text = "@string/second_label" 
        android:background="@drawable/and_button" 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingLeft = "@dimen/pad_horizontal"
        android:paddingRight = "@dimen/pad_horizontal"
        android:paddingTop = "@dimen/pad_vertical"
        android:paddingBottom = "@dimen/pad_vertical"
        android:layout_margin="@dimen/margin"/>
    </TableRow>
    <TableRow>
        <Button
        android:id = "@+id/about_button"
        android:text = "@string/third_label" 
        android:background="@drawable/and_button" 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingLeft = "@dimen/pad_horizontal"
        android:paddingRight = "@dimen/pad_horizontal"
        android:paddingTop = "@dimen/pad_vertical"
        android:paddingBottom = "@dimen/pad_vertical"
        android:layout_margin="@dimen/margin"/>
    </TableRow>
    <TableRow>
        <Button
        android:id = "@+id/exit_button"
        android:text = "@string/fourth_label" 
        android:background="@drawable/and_button" 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingLeft = "@dimen/pad_horizontal"
        android:paddingRight = "@dimen/pad_horizontal"
        android:paddingTop = "@dimen/pad_vertical"
        android:paddingBottom = "@dimen/pad_vertical"
        android:layout_margin="@dimen/margin开发者_如何学JAVA"/>
    </TableRow> 
    </TableLayout>

</LinearLayout>

Any help is great.

It's not clear from your question precisely how you want your layout to look, but I'm guessing (from your XML, at least) that you are after something like this:

I don't have your drawables, so can't include those.

If that's the case, then this layout does the trick:

<?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:layout_height="fill_parent" android:gravity="center">
    <TextView android:text="Bubb" android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <Button android:text="Button" android:id="@+id/button1"
        android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
    <Button android:text="Button" android:id="@+id/button2"
        android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
    <Button android:text="Button" android:id="@+id/button3"
        android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
    <Button android:text="Button" android:id="@+id/button4"
        android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
</LinearLayout>

EDIT: That aligns in a vertical list when switched to landscape:

If you require a horizonal list, simply copy this layout to "res/layout-land" and change the orientation in the outer LinearLayout to "horizontal" :

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

and you'll get this:

Take TableLayout in RelativeLayout and set property of TableLayout as "Layout center in parent=true" or you can use "Layout center horizontal=true" depending on your requirement.