can not change layout_gravity from left - android

I have a simple LinerLayout with 3 child linear layouts , each have a text view
when Im trying to align the text view to the center or to the right , nothing happens. its always aligned to the left, why ?
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_weight="1"
android:id="#+id/alert_type"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/type"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:text="TYPE"/>
</LinearLayout>
<LinearLayout
android:layout_weight="1"
android:layout_below="#id/alert_type"
android:id="#+id/alert_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/alert_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="ALERT"/>
</LinearLayout>
<LinearLayout
android:layout_weight="1"
android:layout_below="#id/alert_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/alert_details"
android:text="DETAILS" />
</LinearLayout>
</LinearLayout>


you can use RelativeLayout instead
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:layout_weight="1"
android:id="#+id/alert_type"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/type"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="right"
android:text="TYPE"/>
</RelativeLayout>
<RelativeLayout
android:layout_weight="1"
android:layout_below="#id/alert_type"
android:id="#+id/alert_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/alert_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:text="ALERT"/>
</RelativeLayout>
<RelativeLayout
android:layout_weight="1"
android:layout_below="#id/alert_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/alert_details"
android:text="DETAILS" />
</RelativeLayout>
</LinearLayout>
or you can use gravity to the linearlayout not textview..like
<LinearLayout
android:layout_weight="1"
android:id="#+id/alert_type"
android:gravity="right"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/type"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TYPE"/>
</LinearLayout>


Change android:layout_width="wrap_content" of TextView to match_parent


Set gravity like
android:gravity="center"


You need to set
android:gravity="center"
for each TextView's and LinearLayout.


change layout_width="wrap_content" and layout_gravity="centre"
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:id="#+id/alert_type"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="1" >
<TextView
android:id="#+id/type"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:text="TYPE" />
</LinearLayout>
<LinearLayout
android:id="#+id/alert_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/alert_type"
android:layout_gravity="center"
android:layout_weight="1" >
<TextView
android:id="#+id/alert_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="ALERT" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/alert_layout"
android:layout_gravity="center"
android:layout_weight="1" >
<TextView
android:id="#+id/alert_details"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="DETAILS" />
</LinearLayout>


Use below XML code for your layout, in which I set all textview at center position
<?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" >
<LinearLayout
android:id="#+id/alert_type"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center" >
<TextView
android:id="#+id/type"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TYPE" />
</LinearLayout>
<LinearLayout
android:id="#+id/alert_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center" >
<TextView
android:id="#+id/alert_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="ALERT" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center" >
<TextView
android:id="#+id/alert_details"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="DETAILS" />
</LinearLayout>
</LinearLayout>
You just need to add android:gravity="center" in your linear layout. You can also provide any alignment like right, center_vertical etc.

Related

Align element to the right in LinearLayout

I am trying to align the express badge to the right of the layout and I need the title to take as much width as possible. This is the code I have right now.
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="?attr/listPreferredItemHeight"
android:orientation="horizontal"
android:padding="#dimen/margin_large">
<ImageView
android:id="#+id/icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
tools:src="#drawable/ic_download" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="1"
android:orientation="vertical"
android:paddingStart="#dimen/margin_large"
android:paddingEnd="#dimen/margin_large">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal">
<TextView
android:id="#+id/title"
style="#style/AppTheme.Text.Light.SemiDarker"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:text="Example of title" />
<com.client.presentation.components.ChipView
android:id="#+id/badge"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
<TextView
android:id="#+id/subtitle"
style="#style/AppTheme.Text.Body1.Light"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:text="Example of subtitle" />
</LinearLayout>
</LinearLayout>

The clue is to set weight to 1 in TextView
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:tools="http://schemas.android.com/tools"
android:minHeight="?attr/listPreferredItemHeight"
android:orientation="horizontal"
android:padding="#dimen/margin_large"
xmlns:android="http://schemas.android.com/apk/res/android">
<ImageView
android:id="#+id/icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
tools:src="#drawable/ic_angry_android" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:orientation="vertical"
android:paddingStart="32dp"
android:paddingEnd="32dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<TextView
android:id="#+id/title"
android:layout_weight="1"
style="#style/AppTheme.Text.Light.SemiDarker"
android:layout_width="0dp"
android:layout_height="wrap_content"
tools:text="Example of title" />
<....
</LinearLayout>
<TextView
android:id="#+id/subtitle"
style="#style/AppTheme.Text.Body1.Light"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:text="Example of subtitle" />
</LinearLayout>
</LinearLayout>

Android UI equal spaces between Textviews [duplicate]

This question already has answers here:
How to make 3 textView control to be on the same size
(6 answers)
Closed 7 years ago.
I have 3 textviews: textItemRef, textViewName and textViewPrice, I want equal spaces between these 3 textviews but they are overlapping each other. Itried setting weight but it didn't help. where is the problem? Here's my Ui
<?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="horizontal" >
<RelativeLayout
android:id="#+id/linearFirst"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp" >
<LinearLayout
android:id="#+id/textItemRef1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginStart="10dp"
>
<TextView
android:id="#+id/textItemRef"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TextView1"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="#color/black" />
</LinearLayout>
<LinearLayout
android:id="#+id/textViewName1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="#+id/textItemRef1">
<TextView
android:id="#+id/textViewName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TextView2"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="#color/black" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="#+id/textViewName1" >
<TextView
android:id="#+id/textViewPrice"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TextView3"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="#color/black" />
</LinearLayout>
</RelativeLayout>
<LinearLayout
android:id="#+id/linear_scroll"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:orientation="vertical" />
<View
android:layout_width="match_parent"
android:layout_height="1dp" />
</LinearLayout>

Try 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:orientation="horizontal">
<LinearLayout
android:id="#+id/linearFirst"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp">
<LinearLayout
android:id="#+id/textItemRef1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginStart="10dp"
android:layout_weight="1">
<TextView
android:id="#+id/textItemRef"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="TextView1"
android:textAppearance="?android:attr/textAppearanceSmall" />
</LinearLayout>
<LinearLayout
android:id="#+id/textViewName1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1">
<TextView
android:id="#+id/textViewName"
android:gravity="center"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TextView2"
android:textAppearance="?android:attr/textAppearanceSmall" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1">
<TextView
android:id="#+id/textViewPrice"
android:gravity="center"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TextView3"
android:textAppearance="?android:attr/textAppearanceSmall" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:id="#+id/linear_scroll"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:orientation="vertical" />
<View
android:layout_width="match_parent"
android:layout_height="1dp" />

You dont need to have nested layout like that instead you can simply have one layout 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:orientation="horizontal" >
<TextView android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:text="Hello"/>
<TextView android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:text="From"/>
<TextView android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:text="Jay"/>
</LinearLayout>
Hope this works :)

1) Change : android:layout_height="wrap_content"
with
android:layout_height="match_parent"
2) set the layout_gravity wherever you want.
3) Your inside LinearLayout has layout_weight="1" and layout_height="0dp"
4) Your TextView has layout_weight=0"
Hope it helps.

Centering a linearlayout present inside a listview

I have a listview which contains a linearlayout. I am trying to get the linearlayout to the center of the screen(horizontally) but it doesn't work.
How it looks -
Portrait -
Landscape -
I want the linearlayout(which has the text "text" and the two images) to come to the center of the screen(horizontally) in both the orientations.
I've tried using layout_gravity on the linearlayout but it doesn't work.
Here's my code -
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#EEEEEE" >
<ListView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/parentListContainer">
</ListView>
</LinearLayout>
Each listview item -
<?xml version="1.0" encoding="utf-8"?>
<!-- I want this layout centered. -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_centerHorizontal="true"
android:layout_gravity="center">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textStyle="bold"
android:layout_marginStart="20dp"
android:layout_marginLeft="20dp"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp"
android:textColor="#000000"
android:text="text"/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:id="#+id/ivBottle1"
android:scaleType="fitXY"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:adjustViewBounds="true"/>
<TextView
android:id="#+id/tvBottle1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="top|center"
android:text="vino"
android:textSize="22sp" >
</TextView>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:id="#+id/ivBottle2"
android:scaleType="fitXY"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:adjustViewBounds="true"/>
<TextView
android:id="#+id/tvBottle2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="top|center"
android:text="vino"
android:textSize="22sp" >
</TextView>
</LinearLayout>
</LinearLayout>
</LinearLayout>
Please help.
EDIT: Neither gravity="center" works on the listview, nor does layout_gravity="center" on the linearlayout.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#EEEEEE" >
<ListView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:id="#+id/parentListContainer">
</ListView>
</LinearLayout>
See here for explanation : https://stackoverflow.com/a/3482757/4706693

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textStyle="bold"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp"
android:textColor="#000000"
android:text="text"/>
<LinearLayout
android:layout_width="match_parent"
android:gravity="center"
android:layout_height="wrap_content"
android:orientation="horizontal">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:id="#+id/ivBottle1"
android:scaleType="fitXY"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:adjustViewBounds="true"/>
<TextView
android:id="#+id/tvBottle1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="top|center"
android:text="vino"
android:textSize="22sp" >
</TextView>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:id="#+id/ivBottle2"
android:scaleType="fitXY"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:adjustViewBounds="true"/>
<TextView
android:id="#+id/tvBottle2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="top|center"
android:text="vino"
android:textSize="22sp" >
</TextView>
</LinearLayout>
</LinearLayout>

Relative layout bottom align issue

I'm trying to implement a relative layout, similar to below picture.
But when trying to bottom align the bottom-right text view, it goes out of the screen.
What is the best/minimal way to design below layout?
Code, currently I'm trying:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<RelativeLayout
android:id="#+id/dash1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="top" >
<RelativeLayout
android:id="#+id/view_subdash_top_right"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_toRightOf="#id/tv_name" >
<TextView
android:id="#+id/tv_instrument_change"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/tv_text2"
android:gravity="right"
android:text="text1" />
<TextView
android:id="#+id/tv_text2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:gravity="right"
android:text="text2" />
</RelativeLayout>
<TextView
android:id="#+id/tv_name"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignBottom="#id/view_subdash_top_right"
android:gravity="bottom|center"
android:text="name" />
</RelativeLayout>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/dash1"
android:gravity="top" >
<!-- Here to enter bottom left -->
<TextView
android:id="#+id/tv_bottom_right"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:gravity="right|bottom"
android:text="bottom right" />
</RelativeLayout>
</RelativeLayout>

// try this
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<RelativeLayout
android:id="#+id/rel_top"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="#+id/tv_top_left"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#id/rel_top_right"
android:text="Top Left Text" />
<RelativeLayout
android:id="#+id/rel_top_right"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:gravity="right"
android:layout_toRightOf="#id/tv_top_left" >
<TextView
android:id="#+id/tv_top_text1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Top Text1" />
<TextView
android:id="#+id/tv_top_text2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/tv_top_text1"
android:text="Top Text2" />
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/rel_top"
android:gravity="top" >
<TextView
android:id="#+id/tv_bottom_right"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignBottom="#id/rel_bottom_left"
android:text="Bottom Right Text" />
<RelativeLayout
android:id="#+id/rel_bottom_left"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_toLeftOf="#id/tv_bottom_right" >
<TextView
android:id="#+id/tv_bottom_text1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Bottom Text1" />
<TextView
android:id="#+id/tv_bottom_text2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/tv_bottom_text1"
android:text="Bottom Text2" />
</RelativeLayout>
</RelativeLayout>
</RelativeLayout>

If you want to fill up the whole screen with those views, I'd use weighted LinearLayout
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1">
<View
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="4"/>
<View
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1">
<View
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"/>
<View
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="4"/>
</LinearLayout>
</LinearLayout>

set TextView in a center vertical and horizontal

I need set textView10 at center of vertical and horizontal. I've tried a lot without results... I tried with gravity options but nothing.. any idea? textView10 is within scrollview. Thanks for help.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#000000"
android:orientation="vertical" >
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
<TextView
android:layout_width="151dp"
android:layout_height="fill_parent"
android:textSize="15pt" />
<ScrollView
android:id="#+id/scrollView10"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="#000000" >
<TextView
android:id="#+id/textView10"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#000000"
android:gravity="center_vertical"
android:textAlignment="center"
android:textColor="#ffffff"
android:textSize="13sp"
android:textStyle="italic" />
</ScrollView>
</LinearLayout>
<Button
android:id="#+id/button10"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Chiudi" />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#000000"
android:orientation="vertical" >
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="horizontal" >
<TextView
android:layout_width="151dp"
android:layout_height="fill_parent"
android:textSize="15pt" />
<ScrollView
android:id="#+id/scrollView10"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="#000000" >
<TextView
android:id="#+id/textView10"
android:layout_width="match_parent"
android:layout_height="320dp"
android:background="#000000"
android:gravity="center"
android:textColor="#ffffff"
android:textSize="13sp"
android:text="Hi What is your name"
android:textStyle="italic" />
</ScrollView>
</LinearLayout>
<Button
android:id="#+id/button10"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Chiudi" />

Change your outer layout to RelativeLayout and position yout ScrollView at the parent center. Position other elements in relation to one in center
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/RelativeLayout1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="horizontal" >
<TextView
android:id="#+id/TextView1"
android:layout_width="151dp"
android:layout_height="fill_parent"
android:textSize="15pt" />
<ScrollView
android:id="#+id/scrollView10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:background="#000000" >
<TextView
android:id="#+id/textView10"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#000000"
android:gravity="center_vertical"
android:textAlignment="center"
android:textColor="#ffffff"
android:textSize="13sp"
android:textStyle="italic" />
</ScrollView>
</RelativeLayout>

Put the TextView inside of a RelativeLayout, and put that RelativeLayout inside of the ScrollView.
Then, set android:layout_centerInParent="true" within the TextView

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