Develop Reference

how to add button on center of view?

I am trying to add button in center (in between the view) but when I add it just below the Textview and AutoCompleteTextView, may I give padding or margin hardcoded? I need "ok" button in between the view (horizontal and vertical center).
Layout XML below:
<?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:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity=""
>
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Choose station"
android:layout_marginLeft="20dp"
android:textAppearance="?android:attr/textAppearanceMedium" />
<AutoCompleteTextView
android:id="#+id/item_autoComplete"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:ems="10"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:text="" >
<requestFocus />
</AutoCompleteTextView>
</LinearLayout>
<Button
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="ok"
android:id="#+id/item_buttonId"/>
</LinearLayout>

android:layout_gravity="center"
<?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:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity=""
>
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Choose station"
android:layout_marginLeft="20dp"
android:textAppearance="?android:attr/textAppearanceMedium" />
<AutoCompleteTextView
android:id="#+id/item_autoComplete"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:ems="10"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:text="" >
<requestFocus />
</AutoCompleteTextView>
</LinearLayout>
<Button
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="ok"
android:layout_gravity="center"
android:id="#+id/item_buttonId"/>
</LinearLayout>

I think your looking for this.Choose some margin or use RelativeLayout.
<?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:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="top"
>
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Choose station"
android:layout_marginLeft="20dp"
android:textAppearance="?android:attr/textAppearanceMedium" />
<AutoCompleteTextView
android:id="#+id/item_autoComplete"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:ems="10"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginBottom="100dp"
android:text="" >
<requestFocus />
</AutoCompleteTextView>
</LinearLayout>
<Button
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="ok"
android:layout_gravity="center"
android:id="#+id/item_buttonId"/>
</LinearLayout>

ScrollView dos not work

Dear All experts I have problem with using scrollView anyone please help.. the Error is showing that the ScrollView is useless and also in other form of mine is shows the same , how can I solve this and how can I make my forms and activities been scroll ??
`
<ScrollView
android:id="#+id/scrollView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="30dp"
android:text="#string/welcome"
android:textAppearance="?android:attr/textAppearanceMedium" />
<ImageView
android:id="#+id/imageView1"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_gravity="center"
android:layout_margin="30dp"
android:contentDescription="#+id/button1"
android:src="#drawable/ic_launcher" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="20dp"
android:orientation="horizontal" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/username"
android:textAppearance="?android:attr/textAppearanceSmall" />
<EditText
android:id="#+id/editText1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="text" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/password"
android:textAppearance="?android:attr/textAppearanceSmall" />
<EditText
android:id="#+id/editText2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPassword" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:orientation="vertical" >
<Button
android:id="#+id/button1"
style="android:buttonStyle"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:onClick="goToMain"
android:text="#string/log_in" />
<Button
android:id="#+id/button2"
style="android:buttonStyle "
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:onClick="register"
android:text="#string/registration" />
</LinearLayout>
</ScrollView>
`

You need a child container as LinearLayout, TableLayout or RelativeLayout in your ScrollView like this:
<ScrollView
... >
<LinearLayout
... >
<!-- Your views: TextView, LinearLayout, etc. -->
</LinearLayout>
</ScrollView>
According to the reference:
A ScrollView is a FrameLayout, meaning you should place one child in it containing the entire contents to scroll

You should put all the other fields in a single Layout.. Like linear layout,relative layout. Your whole code should look like this
<ScrollView
android:id="#+id/scrollView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="30dp"
android:text="#string/welcome"
android:textAppearance="?android:attr/textAppearanceMedium" />
<ImageView
android:id="#+id/imageView1"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_gravity="center"
android:layout_margin="30dp"
android:contentDescription="#+id/button1"
android:src="#drawable/ic_launcher" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="20dp"
android:orientation="horizontal" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/username"
android:textAppearance="?android:attr/textAppearanceSmall" />
<EditText
android:id="#+id/editText1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="text" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/password"
android:textAppearance="?android:attr/textAppearanceSmall" />
<EditText
android:id="#+id/editText2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPassword" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:orientation="vertical" >
<Button
android:id="#+id/button1"
style="android:buttonStyle"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:onClick="goToMain"
android:text="#string/log_in" />
<Button
android:id="#+id/button2"
style="android:buttonStyle "
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:onClick="register"
android:text="#string/registration" />
</LinearLayout>
</LinearLayout>
</ScrollView>

"Scrollview can host only one direct child"
Put all your stuff in some Layout e.g LinearLayout

When focus on the edite text resize layout

when i press on the edit text the layout become re-size. What i want is not to change the layout size when i press on the keyboard
I tried
android:windowSoftInputMode="stateVisible|adjustPan"
Refer from below link
http://developer.android.com/guide/topics/manifest/activity-element.html#wsoft
Don't make any difference
<?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:background="#bbbbbb"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight=".1"
android:background="#0486CC" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight=".34"
android:src="#drawable/logo" />
<TextView
android:id="#+id/textView1"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight=".32" />
<Button
android:id="#+id/button1"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight=".16"
android:background="#drawable/newmenu"
android:onClick="MenuStaffBtnClick" />
<Button
android:id="#+id/button2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight=".18"
android:background="#drawable/menu_sync"
android:onClick="MenuSynBtnClick" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight=".2" >
<EditText
android:id="#+id/etNamecheck"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="10dp"
android:layout_weight=".6"
android:ems="10"
android:hint="Name" />
<RadioGroup
android:id="#+id/rgSearch"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight=".4"
android:orientation="horizontal" >
<RadioButton
android:id="#+id/rbID"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<RadioButton
android:id="#+id/rbName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true" />
</RadioGroup>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight=".7"
android:orientation="vertical" >
<ListView
android:id="#+id/LVitems"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:background="#bbbbbb"
android:dividerHeight="5dp" >
</ListView>
</LinearLayout>

try this layout code and add android:windowSoftInputMode="stateVisible|adjustPan" in android manifest file
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/RelativeLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<ScrollView
android:id="#+id/scrolllayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:id="#+id/LinearLayout1"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:layout_marginTop="5dp"
android:orientation="vertical"
android:layout_gravity="center_vertical"
android:gravity="center"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="SignIn"
android:textColor="#000000"
android:layout_marginTop="10dp"
android:textSize="20dp"
/>
<EditText
android:id="#+id/userid"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:textColor="#000000"
android:hint="type username" />
<EditText
android:id="#+id/passwordid"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="type password"
android:layout_marginTop="20dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:textColor="#000000"
android:inputType="textPassword" />
<Button
android:id="#+id/loginid"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:textColor="#color/list_item_title"
android:text="Signin"
android:textSize="20dp"
android:background="#drawable/btngradient"
/>
<Button android:id="#+id/registerid"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="40dip"
android:textSize="20dp"
android:text=" Register"
android:gravity="center"
android:background="#drawable/btngradient"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginBottom="5dp"
android:textColor="#FFFFFF"/>
</LinearLayout>
</ScrollView>
</RelativeLayout>

Is there any way to fix the header to not scroll with the enter of the softkeyboard in a activity?

I have a activity with a header on the top and a EditText below. When I am texting and press enter on the keyboard, the screen scroll down and hide the header. Is there any way to fix the header or, when press enter on the keyboard, not to scroll down the screen?
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".ComentariosActivity" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="10"
android:background="#drawable/background_40_blue"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="44dp"
android:background="#drawable/navigation_bar"
android:orientation="vertical" >
<ImageView
android:id="#+id/ivButtonOkComentarios"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_marginBottom="1dp"
android:layout_marginTop="2dp"
android:src="#drawable/mini_button_ok" />
</RelativeLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="2dp"
android:text="4"
android:textColor="#FFCC66"
android:textSize="48sp" />
<TextView
android:id="#+id/tvRedeConfirmar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="10dp"
android:layout_marginTop="2dp"
android:text="Faça um comentário sobre a sua avaliação"
android:textColor="#android:color/white"
android:textSize="18sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="7"
android:orientation="vertical" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:src="#drawable/borda_tabela" />
<EditText
android:id="#+id/etComentarios"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:ems="10"
android:gravity="center_vertical|top"
android:maxLength="500"
>
<requestFocus />
</EditText>
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="3"
android:gravity="bottom" >
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="2"
android:orientation="vertical" >
<ImageView
android:id="#+id/ivRodapeComentarios"
android:layout_width="match_parent"
android:layout_height="56dp"
android:background="#00000000"
android:scaleType="fitXY"
android:src="#drawable/rodape_tappa" />
</LinearLayout>

EditText one in focus others invisible?

I have a problem with a form.
I have inserted 3 EditText and one is in focus, but others are invisible but we can click on.
What is the problem? Can i set a bottom border for others edittext even if there are not in focus?
Edit :
Here is an image of the problem :
http://hpics.li/2c79ed7
Here is the code of the layout :
<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/group_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/btnBackground"
android:orientation="horizontal" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginBottom="10dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:background="#color/white" >
<ScrollView
android:id="#+id/scrollView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/TextView05"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Titre du deal"
android:textColor="#color/hautLayout"
android:textSize="16dp" />
<EditText
android:id="#+id/EditText_titre"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_weight="1" >
<requestFocus />
</EditText>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/TextView04"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Lien du deal"
android:textColor="#color/hautLayout"
android:textSize="16dp" />
<EditText
android:id="#+id/EditText_lien"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_weight="1" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/TextView03"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Prix sans réduction"
android:textColor="#color/hautLayout"
android:textSize="16dp" />
<EditText
android:id="#+id/EditText_PrixSansReduc"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_weight="1" />
</LinearLayout>
</ScrollView>
</RelativeLayout>
</RelativeLayout>