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Align objects into middle of layout

I am dealing with ADK and I have a problem. I use LinearLayout, and I want to put my objects into middle and center of layout.
Here is my code
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center_horizontal|center_vertical"
<TextView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center_horizontal|center_vertical"
<Button
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center_horizontal|center_vertical"
<Button
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center_horizontal|center_vertical"
</LinearLayout>
Still it goes to the TOP CENTER or to left. Should I use something else instead of LinearLayout? Or is there special code for centering and middling?
Thank you for helping!
Note: Unnecessary parts are removed.

You can use RelativeLayout with nested LinearLayout. Put all your view into LinearLayout without applying centering and set centerInParent="true".
But in your case just remove layout_gravity attribute from your views and add gravity="center" to the root view.
And also you forget to close your view's tags;)
So the final layout will be something like this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>

You should consider these things
Because LinearLayout just adds views one by one, your LinearLayout android:layout_width and android:layout_height should be "fill_parent" to show your views correctly
android:layout_gravity should be "center_horizontal|center_vertical"
Try adding android:layout_weight for your objects

How to set height of SlidingDrawer through XML?

I am trying to use a SlidingDrawer which has a bottom to top structure.. I have placed 4 spinners inside the content of that sliding drawer.. And when i executes, the handle(which i have an image) is showing above the screen. I want that handle just above the content(ie just above the 4 spinners..)
here is my xml layouts...
main.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<SlidingDrawer
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/drawer"
android:handle="#+id/MyHandle"
android:content="#+id/MyContent">
<LinearLayout
android:id="#+id/MyHandle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="bottom"
android:orientation="vertical">
<ImageView
android:id="#+id/SlideIcon"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:src="#drawable/images"/>
</LinearLayout>
<FrameLayout
android:id="#+id/MyContent"
android:layout_width="fill_parent"
android:layout_height="200dip"
android:orientation="vertical">
<include
android:id="#+id/DrawerContent"
layout="#layout/spinnerlayout"
android:layout_height="wrap_content"/>
</FrameLayout>
</SlidingDrawer>
</FrameLayout>
and spinnerlayout.xml..
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:foregroundGravity="bottom"
android:layout_gravity="bottom"
android:background="#color/grey">
<LinearLayout
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:orientation="vertical">
<Spinner
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/spinner_first"/>
<Spinner
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/spinner_second"/>
<Spinner
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/spinner_third"/>
<Spinner
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/spinner_fourth"/>
</LinearLayout>
</FrameLayout>
And to make my question more clear, i have the screenshots..
I want to have that handle(arrow) just above that spinners..
Is it possible to place it?

The onMeasure() method of the SlidingDrawer class basically overrides the layout modes to fill_parent, this is why layout_height="wrap_content" is not working.
To get around this, you can extend SlidingDrawer with a re-implemented onMeasure() method that honors the layout_width and layout_height attributes. You can then use this custom class in your XML layout by replacing with .
Note that since the drawer will no longer be filling the parent layout, you will have to enclose it in a LinearLayout with the gravity attribute set to the edge where the drawer should be.
the Answer
your Question

How can I place new items under scrollview

I have a vertical scrollable layout with lots of items, working fine.
I am trying to place a new linearlayout to the bottom of the screen that would NOT be part of the scrollable layout.
That is, it would sit on the buttom (like an adview) independent of the scrollable part.
I was only able to place it inside the scrollView. How can I place it below, so it would always visible ?

Use a RelativeLayout, and organize it like this:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ScrollView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignParentTop="true"
android:layout_above="#+id/linearLayoutThatDoesNotScroll" >
<LinearLayout
android:id="#+id/linearLayoutWithLotofContent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
</LinearLayout>
</ScrollView>
<LinearLayout
android:id="#+id/linearLayoutThatDoesNotScroll"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" >
</LinearLayout>
</RelativeLayout>
The trick is in the ScrollView placement, at the same time it is aligned with the top of the screen AND above the lower, fixed, LinearLayout. It just works.

something like this :)
<?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" >
<ScrollView android:id="#+id/scroll_view"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1" >
<LinearLayout android:id="#+id/content"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</ScrollView>
<LinearLayout android:id="#+id/bottom"
android:layout_width="fill_parent"
android:layout_height="10dip" />
</LinearLayout>
You will add your bottom content to the bottom linearLayout with the android:id=bottom :)

If you used a vertical LinearLayout to hold the scrollable layout, then you could add the adview to the LinearLayout below the scrollable layout and it would appear at the bottom of the screen. (assuming your weights are set correctly,and the scroll layout is set to WRAP_CONTENT)
A RelativeLayout would allow you to set the adview to align itself with the bottom of the scrollable layout as well, but you would still need to make sure the scrollable layout was set to WRAP_CONTENT so it didn't automatically take up the entire screen.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<Button
android:id="#+id/dialogButtonOK"
android:layout_width="100px"
android:layout_height="wrap_content"
android:text=" Ok "
android:layout_alignParentBottom="true"
android:layout_centerInParent="true"
android:background="#drawable/button_style"
/>
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:id="#+id/scrView"
android:layout_above="#id/dialogButtonOK"
android:layout_alignParentTop="true"
>
<HorizontalScrollView
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:stretchColumns="*"
android:id="#+id/main_table" >
</TableLayout>
</HorizontalScrollView>
</ScrollView>
</RelativeLayout>
This is worked for me

Button at Bottom

Im not very good in creating android layouts so I am not able to align the button to the bottom in the MainView.
Picture:
Layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:id="#+id/linearLayout1" android:layout_width="fill_parent" android:layout_height="wrap_content" xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical">
<ListView android:id="#+id/lv_pizza" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:layout_weight="1"></ListView>
<Button android:layout_width="fill_parent" android:id="#+id/bt_add"
android:layout_height="wrap_content" android:text="hinzufügen"></Button>
<RelativeLayout android:layout_width="fill_parent" android:id="#+id/relativeLayout2" android:layout_height="fill_parent">
</RelativeLayout>
</LinearLayout>
Please help

This works for a linear layout, note the layout_weight 1 on the list -- that's what pushes the button to the bottom:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ListView android:id="#+id/lv_pizza"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
<Button android:id="#+id/bt_add"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="hinzufügen" />
</LinearLayout>
This then looks like this in the UI editor:

Hi you can set like this
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:id="#+id/linearLayout1" android:layout_width="fill_parent" android:layout_height="wrap_content" xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical">
<ListView android:id="#+id/lv_pizza" android:layout_width="fill_parent"
android:layout_above="#+id/bt_add" android:layout_height="fill_parent" ></ListView>
<Button android:layout_width="fill_parent" android:id="#+id/bt_add"
android:layout_gravity="bottom" android:layout_height="wrap_content" android:text="hinzufügen"></Button>
</RelativeLayout>

Removing the RelativeLayout will push the button to bottom of the screen...

Use a layout_weight for the components inside the LinearLayout. If the ListView has a weight of 1.0, it should push the button to the bottom. I've done this with a ScrollLayout and it works well, allowing the component inside the scroll layout to actually scroll. You could put your ListView into a ScrollLayout to let it grow beyond the visible size.
Also, the second relativelayout also isn't necessary as it doesn't add anything.

You can set a marginTop in the Button until the bottom or change the layout to relative and set the position.

Android ListView doesn't expand the whole screen

I've problem similar to the one here: Android ListView doesn't expand the whole screen?
The XML is:
<?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:id="#+id/ResultLayout">
<ScrollView android:layout_width="fill_parent" android:layout_height="fill_parent">
<ListView android:layout_width="fill_parent" android:id="#+id/ListView"
android:layout_height="fill_parent"></ListView>
</ScrollView>
<LinearLayout android:id="#+id/pagingPanel"
android:gravity="center" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:orientation="horizontal"></LinearLayout>
<Spinner android:layout_width="fill_parent" android:id="#+id/ManSpinner"
android:layout_height="fill_parent" />
</LinearLayout>
In this case, I should have a ScrollView or the PagingPanel LinearLayout will disappear.
Edit
The desired layout is to have all the elements stacked on top of each other. but if the elements exceed the page height, a scroll should be added to the ListView.

If you have a vertical LinearLayout, You can't have multiple fill_parent for layout_height of your LinearLayout elements. What layout you would like to achieve? Uniformly divide screen for all elements?
Another problem is that using ListView in ScrollView is not a good idea also because ListView itself is scrollable.
You should write what layout you would like to achieve with your XML. Also generally is a good practice to write your XML in multiple steps and iterate to woking solution layout by layout.
EDIT: Ok, try something like this:
<?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:id="#+id/ResultLayout">
<ListView android:id="#+id/ListView"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1" />
<LinearLayout android:id="#+id/pagingPanel"
android:gravity="center"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
</LinearLayout>
<Spinner android:id="#+id/ManSpinner"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</LinearLayout>