LinearLayout at the top and at the bottom of the screen

I have two different LinearLayouts inside one LinearLayout and I would like the first layout to be at the top and the second layout to be at the bottom. I tried with android:gravity="top" but it didn't work. Here is my xml code:

<?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">

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="wrap_content" android:gravity="top">
    <ImageView android:layout_height="wrap_content" android:id="@+id/imageView1"
        android:src="@drawable/icon" android:layout_width="wrap_content"></ImageView>
    <TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent" android:layout_height="wrap_content">
        <TableRow android:weightSum="2">
            <Button android:text="Button" android:id="@+id/button2"
                android:layout_width="wrap_content" android:layout_height="wrap_content"
                android:layout_weight="1"></Button>
            <Button android:text="Button" android:id="@+id/button1"
                android:layout_width="wrap_content" android:layout_height="wrap_content"
                android:layout_weight="1"></Button>
        </TableRow>
        <TableRow android:weightSum="2">
            <Button android:text="Button" android:id="@+id/button3"
                android:layout_width="wrap_content" android:layout_height="wrap_content"
                android:layout_weight="1"></Button>
            <Button android:text="Button" android:id="@+id/button4"
                android:layout_width="wrap_content" android:layout_height="wrap_content"
                android:layout_weight="1"></Button>
        </TableRow>
    </TableLayout>
</LinearLayout>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="wrap_content" android:gravity="bottom">
    <ImageView android:layout_height="wrap_content" android:id="@+id/imageView1"
        android:src="@drawable/icon" android:layout_width="wrap_content"></ImageView>
    <TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent" android:layout_height="wrap_content">
        <TableRow android:weightSum="2">
            <Button android:text="Button" android:id="@+id/button2"
                android:layout_width="wrap_content" andr开发者_高级运维oid:layout_height="wrap_content"
                android:layout_weight="1"></Button>
            <Button android:text="Button" android:id="@+id/button1"
                android:layout_width="wrap_content" android:layout_height="wrap_content"
                android:layout_weight="1"></Button>
        </TableRow>
        <TableRow android:weightSum="2">
            <Button android:text="Button" android:id="@+id/button3"
                android:layout_width="wrap_content" android:layout_height="wrap_content"
                android:layout_weight="1"></Button>
            <Button android:text="Button" android:id="@+id/button4"
                android:layout_width="wrap_content" android:layout_height="wrap_content"
                android:layout_weight="1"></Button>
        </TableRow>
    </TableLayout>
</LinearLayout>

You could simply add :

<LinearLayout android:layout_width="fill_parent"
        android:layout_height="wrap_content" android:layout_weight="1" />

between your top and bottom LinearLayout(and remove the gravity from the parent container).

change you parent layout as RelativeLayout instead of LinearLayout, and

for top of the parent layout set following in child layout

android:layout_alignParentTop="true"

and for bottom of the parent layout set following in child layout

android:layout_alignParentBottom="true"