Develop Reference

Set textview below another textview in horizontal linear layout

How to set TextView object tvOperationDesc below tvOperationName
This is my layout xml:
<?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:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<TextView
android:id="#+id/tvOperationName"
android:layout_width="0sp"
android:layout_height="fill_parent"
android:layout_weight="2"
android:gravity="center_vertical"
/>
<TextView
android:id="#+id/tvOperationDesc"
android:layout_width="0sp"
android:layout_height="fill_parent"
android:layout_weight="2"
android:gravity="center_vertical"
android:layout_below="#+id/tvOperationName"
/>
<EditText
android:id="#+id/txtMultiplier"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:inputType="numberDecimal"
android:text="0"
android:textAppearance="?android:attr/textAppearanceSmall" />
<CheckBox
android:id="#+id/cbChkBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
</RelativeLayout>

Use 2 separate horizontal linear layouts in your relative layout and you can adjust the weights and the heights as you like:
<?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:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin">
<LinearLayout
android:id="#+id/upLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="3">
<TextView
android:id="#+id/tvOperationName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2" />
<EditText
android:id="#+id/txtMultiplier"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:inputType="numberDecimal"
android:text="0"
android:textAppearance="?android:attr/textAppearanceSmall" />
<CheckBox
android:id="#+id/cbChkBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_below="#+id/upLayout">
<TextView
android:id="#+id/tvOperationDesc"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"/>
</LinearLayout>
</RelativeLayout>

Textview below textview in horizontal linear layout
Not possible at all. Its clearly mentioned horizontal linear layout. So, you views are aligned horizontally only.
Then
If you set your linear layout orientation to horizontal your views are aligned horizontally & orientation to vertical your views are aligned vertically in linear manner that means one by one.
Solution
One relative layout is enough for your requirements. Have a look at my answer How relative layout views are aligned will help you.

Please try below code.
<TextView
android:id="#+id/tvOperationDesc"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Description" />
<LinearLayout
android:id="#+id/secondLinearLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="#+id/tvOperationName"
android:layout_width="0sp"
android:layout_height="fill_parent"
android:layout_weight="2"
android:gravity="center_vertical"
android:text="Name" />
<EditText
android:id="#+id/txtMultiplier"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:inputType="numberDecimal"
android:text="0"
android:textAppearance="?android:attr/textAppearanceSmall" />
<CheckBox
android:id="#+id/cbChkBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
if you want EditText and Checkbox in the same line as tvOperationName vertically just change orientation of secondLinearLayout to vertical and give gravity="center_horizontal" to secondLinearLayout.

Add another LinearLayout with orientation to vertical, and place both the TextView.
And remove layout_below property inside LinearLayout’s child view, as its useless.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="#+id/tvOperationName"
android:layout_width="0sp"
android:layout_height="fill_parent"
android:layout_weight="2"
android:gravity="center_vertical"
/>
<TextView
android:id="#+id/tvOperationDesc"
android:layout_width="0sp"
android:layout_height="fill_parent"
android:layout_weight="2"
android:gravity="center_vertical"
android:layout_below="#+id/tvOperationName"
/>
</LinearLayout>

HORIZONTAL LinearLayout is not centered and I'm setting :gravity to "center"

I'm tring to have a horizontal LinearLayout to be centered.
I tried
android:gravity="center"
(whitch did not center it)
and tried
android:gravity="center"
android:layout_weight="1"
(the layout was not displayed)
current xml file
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:orientation="horizontal" >
<CheckBox android:id="#+id/idCheckBuyOrders"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=" Buy Orders"
android:onClick="onCheckBuyClicked"/>
<CheckBox android:id="#+id/idCheckSellOrders"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=" Sell Orders"
android:onClick="onCheckSellClicked"/>
<CheckBox android:id="#+id/idCheckOpenOrders"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=" Close Orders"
android:onClick="onCheckCloseClicked"/>
</LinearLayout>
<ListView
android:id="#+id/list_view2"
android:layout_width="match_parent"
android:layout_height="match_parent"></ListView>
</LinearLayout>

Try to use android:layout_gravity="center" like below code :
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="1"
android:orientation="horizontal"/>

Please make LinearLayout width as match_parent like this android:layout_width="match_parent"

You can do like this
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="horizontal" >
<CheckBox android:id="#+id/idCheckBuyOrders"
android:layout_width="0dp"
android:layout_weight="0.33"
android:layout_height="wrap_content"
android:text=" Buy Orders"
android:onClick="onCheckBuyClicked"/>
<CheckBox android:id="#+id/idCheckSellOrders"
android:layout_width="0dp"
android:layout_weight="0.33"
android:layout_height="wrap_content"
android:text=" Sell Orders"
android:onClick="onCheckSellClicked"/>
<CheckBox android:id="#+id/idCheckOpenOrders"
android:layout_width="0dp"
android:layout_weight="0.33"
android:layout_height="wrap_content"
android:text=" Close Orders"
android:onClick="onCheckCloseClicked"/>
</LinearLayout>
<ListView
android:id="#+id/list_view2"
android:layout_width="match_parent"
android:layout_height="match_parent"></ListView>
</LinearLayout>

Just change your LinearLayout width as match_parent.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:orientation="horizontal" >

Just change width of LinearLayout container to match_parent.
Like this
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"// *<== wrap_content to match_parent*
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:orientation="horizontal" >
You will be good to go. :)

Align checkbox to the right side in LinearLayout android

I am trying to make some text views with checkboxes in LinearLayout. I want for result like this:
TextView Ckeckbox
TextViewwwwww Ckeckbox
TextV Ckeckbox
But currently I have this:
TextView Checkbox
TextViewwwww Checkbox
TextView Checkbox
Here is my xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentTop="true"
android:orientation="horizontal">
<TextView
android:id="#+id/itemTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<CheckBox
android:id="#+id/checkItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
</LinearLayout>
And this xml gives me same result:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentTop="true"
android:orientation="horizontal">
<TextView
android:id="#+id/itemTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="start"/>
<CheckBox
android:id="#+id/checkItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="end"/>
</LinearLayout>

You can use the layout_weight attribute on your TextView only to automatically designate the TextView to fill any space which the CheckBox does not occupy. For example, the following will set your checkboxes to the end (provided they have no text associated with them) and then lets the TextView fill the rest of the layout.
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:orientation="horizontal">
<TextView
android:id="#+id/itemTitle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1" />
<CheckBox
android:id="#+id/checkItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
Additionally, you should use match_parent instead of fill_parent as fill_parent is deprecated.

Try this:
<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="com.example.ipdemo.MainActivity" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="#+id/itemTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="TextView" />
<CheckBox
android:id="#+id/checkItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" />
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="TextView" />
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" />
</LinearLayout>
</LinearLayout>

Use layout weights and try this:
<?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:layout_alignParentTop="true"
android:orientation="horizontal"
android:weightSum="5">
<TextView
android:id="#+id/itemTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="wdjhwdjwo"/>
<CheckBox
android:id="#+id/checkItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="4"/>
</LinearLayout>

You should be using layout_weight attribute to achieve the effect
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal">
<TextView
android:id="#+id/itemTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" />
<CheckBox
android:id="#+id/checkItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" />
</LinearLayout>
So horizontally both the views will be occupying half of the screen size. You could adjust layout_weight to achieve the desired outcome.
There maybe other ways to do this, but I think this method is the best way.

Use layout_gravity="right" instead of gravity="end" if you're working with vertical layouts.
Your CheckBox tag should look like:
<CheckBox
android:id="#+id/checkItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"/>
EDIT: On horizontal layouts, try layout_weight="1", that will make both of your elements fill half of the layout space.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:orientation="horizontal">
<TextView
android:id="#+id/itemTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"/>
<CheckBox
android:id="#+id/checkItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"/>
</LinearLayout>

check the following use android:layout_weight="1" in both view
<?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:layout_alignParentTop="true"
android:orientation="horizontal">
<TextView
android:id="#+id/itemTitle"
android:layout_width="fill_parent"
android:layout_weight="1"
android:layout_height="wrap_content"
/>
<CheckBox
android:id="#+id/checkItem"
android:layout_width="fill_parent"
android:layout_weight="1"
android:layout_height="wrap_content"
/>
</LinearLayout>

How to align linearlayout to vertical center?

I'm trying to align LinearLayout's vertical center which shows following pic (skycolor border) to delete button's vertical center.
so I set the gravity of id:groupNumbers to center_vertical.
but no changed.
How to align id:groupNumbers to button's center?
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/groupNumbers"
android:orientation="horizontal"
android:gravity="center_vertical"
android:layout_weight="0.7"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<LinearLayout
android:orientation="horizontal"
android:layout_weight="1"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="#+id/txtSelected01"
android:text="00"
android:textSize="30dp"
android:gravity="center_horizontal"
android:layout_weight="1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_weight="1"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="#+id/txtSelected02"
android:text="00"
android:textSize="30dp"
android:gravity="center_horizontal"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content"/>
</LinearLayout>
</LinearLayout>
<Button
android:id="#+id/btn_deleteNum"
android:text="Delete"
android:textSize="20dp"
android:layout_weight="0.2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>

Change orientation and gravity in
<LinearLayout
android:id="#+id/groupNumbers"
android:orientation="horizontal"
android:gravity="center_vertical"
android:layout_weight="0.7"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
to
android:orientation="vertical"
android:layout_gravity="center_vertical"
You are adding orientation: horizontal, so the layout will contain all elements in single horizontal line. Which won't allow you to get the element in center.

use android:layout_gravity instead of android:gravity
android:gravity sets the gravity of the content of the View its used on.
android:layout_gravity sets the gravity of the View or Layout in its parent.

Use layout_gravity instead of gravity. layout_gravity tells the parent where it should be positioned, and gravity tells its child where they should be positioned.
<LinearLayout
android:id="#+id/groupNumbers"
android:orientation="horizontal"
android:layout_gravity="center_vertical"
android:layout_weight="0.7"
android:layout_width="wrap_content"
android:layout_height="wrap_content">

For me, I have fixed the problem using android:layout_centerVertical="true" in a parent RelativeLayout:
<RelativeLayout ... >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_centerVertical="true">
</RelativeLayout>

For a box that appears in the center - horizontal & vertical - I got this to work with just one LinearLayout. The answer from Viswanath L was very helpful
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="#drawable/layout_bg"
android:gravity="center"
android:orientation="vertical"
android:padding="20dp">
<TextView
android:id="#+id/dialog_header"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:padding="10dp"
android:text="Error"
android:textColor="#000" />
<TextView
android:id="#+id/message_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:padding="10dp"
android:text="Error-Message"
android:textColor="#000" />
<Button
android:id="#+id/dialogButtonOK"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/message_text"
android:layout_gravity="center_horizontal"
android:layout_marginTop="5dp"
android:text="Ok" />
</LinearLayout>

use RelativeLayout inside LinearLayout
example:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="Status"/>
</RelativeLayout>
</LinearLayout>

Use android:weightSum property to the parent LinearLayout and give value 3. Then in the children LinearLayout use android:layout_weight 2 and 1 respectively. Then in the First Chil LinearLayout use android:layout_gravity="center_vertical". As shown in the following code
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="3"
android:orientation="horizontal">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="2"
android:layout_gravity="center_vertical"
android:orientation="horizontal">
<TextView
android:id="#+id/status_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="00"
android:textColor="#color/red"
android:textSize="#dimen/default_text_size"
/>
<TextView
android:id="#+id/status_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="00"
android:textColor="#color/red"
android:textSize="#dimen/default_text_size"
/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1">
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Delete"/>
</LinearLayout>
</LinearLayout>

You can change set orientation of linearlayout programmatically by:
LinearLayout linearLayout =new linearLayout(this);//just to give the clarity
linearLayout.setOrientation(LinearLayout.VERTICAL);

RelativeLayout inside LinearLayout?

I was wondering what I am doing wrong here, why does surrounding these buttons in a RelativeLayout cause an error? I haven't edited layouts much, can I not just stick in a Relative or Linear layout like that?
If I don't surround the buttons in a layout they appear beneath each other, I am just trying to experiment in having them beside each other horizontally.
I think the way I have done this whole layout is bad because vertically it looks quite squished.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/MainLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<LinearLayout android:id="#+id/topButtons"
android:layout_margin="4dip"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<Button android:id="#+id/deviceConnect"
android:layout_margin="8dip"
android:layout_weight="3"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:text="Connect2"/>
<LinearLayout android:orientation="vertical"
android:layout_weight="1"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<LinearLayout android:orientation="horizontal"
android:layout_margin="8dip"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView android:text="Connected Adapter:"
android:layout_gravity="center_vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Spinner android:id="#+id/deviceSpinner"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:drawSelectorOnTop="true"/>
<TextView android:id="#+id/currentSettings"
android:layout_marginLeft="8dip"
android:text="Current Settings: Not Connected"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"/>
</LinearLayout>
<LinearLayout android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<LinearLayout android:orientation="horizontal"
android:layout_margin="8dip"
android:layout_weight="1"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView android:text="Baud:"
android:layout_gravity="center_vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Spinner android:id="#+id/baudSpinner"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:drawSelectorOnTop="true"/>
</LinearLayout>
<LinearLayout android:orientation="horizontal"
android:layout_margin="8dip"
android:layout_weight="1"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView android:text="Data:"
android:layout_gravity="center_vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Spinner android:id="#+id/dataSpinner"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:drawSelectorOnTop="true"/>
</LinearLayout>
<LinearLayout android:orientation="horizontal"
android:layout_margin="8dip"
android:layout_weight="1"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView android:text="Parity:"
android:layout_gravity="center_vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Spinner android:id="#+id/paritySpinner"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:drawSelectorOnTop="true"/>
</LinearLayout>
<LinearLayout android:orientation="horizontal"
android:layout_margin="8dip"
android:layout_weight="1"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView android:text="Stop:"
android:layout_gravity="center_vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Spinner android:id="#+id/stopSpinner"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:drawSelectorOnTop="true"/>
</LinearLayout>
</LinearLayout>
</LinearLayout>
<Button android:id="#+id/updateSettings"
android:layout_margin="8dip"
android:layout_weight="3"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:text="Update\nSettings"/>
</LinearLayout>
<RelativeLayout>
<Button android:id="#+id/Command"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Test Command"/>
<Button android:id="#+id/Command"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Test Command"/>
<Button android:id="#+id/Command"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Test Command"/>
<Button android:id="#+id/Command"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Test Command"/>
<Button android:id="#+id/Command"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Test Command"/>
</RelativeLayout>
<jackpal.androidterm.emulatorview.EmulatorView
android:id="#+id/emulatorView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:focusable="true"
android:focusableInTouchMode="true"
/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0"
android:orientation="horizontal" >
<EditText
android:id="#+id/term_entry"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:singleLine="true"
android:imeOptions="actionNone|flagNoExtractUi"
android:inputType="text|textImeMultiLine" />
<Button
android:id="#+id/term_entry_send"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0"
android:text="#string/entry_send" />
</LinearLayout>

As others have pointed out already, you need to define a layout_width and layout_height for your RelativeLayout. This should fix your error, unless there are other issues you have. But I thought it was worth noting what the DOCS say about layouts
A RelativeLayout is a very powerful utility for designing a user interface because it can eliminate nested view groups and keep your layout hierarchy flat, which improves performance. If you find yourself using several nested LinearLayout groups, you may be able to replace them with a single RelativeLayout.
You have many nested LinearLayouts so you may consider using a RelativeLayout for better performance and readability. You can also use android:orientation="horizontal" in a nested LinearLayout to get your buttons next to each other. But, again, a RelativeLayout may be better in your situation instead of having all of the nested layouts.

Your relativeLayout has no size.
Define layout_height and layout_width to it

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">