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Android Increasing View's Layout Weight Decreases Actual Width

I've tried to track down what's going wrong here, and I'm coming up with nothing. If i change my layout weight from 1 to 2, on the first view in my horizontal linear layout, the resulting width actually decreases. Here is the code.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:weightSum="7">
<TextView android:id="#+id/filterButton"
android:layout_width="0dp"
android:layout_weight="2"
android:layout_height="wrap_content"
android:padding="0dp"
android:textColor="#android:color/white"
android:text="filter"></TextView>
<RelativeLayout
android:layout_width="0dp"
android:layout_weight="4"
android:layout_height="fill_parent"
android:gravity="center" >
<AutoCompleteTextView
android:id="#+id/editText1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:ems="14"
android:imeOptions="actionDone"
android:inputType="textAutoComplete|textAutoCorrect"
android:textColor="#FFFFFF"
android:singleLine="true"
android:gravity="left">
</AutoCompleteTextView>
<ImageView android:id="#+id/clear"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:src="#drawable/close"
android:layout_alignParentRight="true"
android:scaleType="fitEnd"
android:adjustViewBounds="true"
android:padding="12dp"
android:visibility="invisible"
android:tint="#android:color/white"/>
</RelativeLayout>
<ImageView android:id="#+id/listButton"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="fill_parent"
android:src="#drawable/list"
android:scaleType="fitCenter"
android:adjustViewBounds="true"
android:padding="9dp"
android:tint="#android:color/white"></ImageView>
</LinearLayout>
Here is what my action bar looks like with the TextView's layout weight set to 1.
You can see I'm already getting some overflow on the right element. It's getting bumped off screen. Here is what it looks like with the TextView's weight set to 2.
Which is odd because the TextView has actually decreased in size. Here is the action bar without the TextView. The sizes are behaving well here.
Any help would be greatly appreciated!

It looks similar to problem i have sometimes.
For layout with weight 7 it would give space like that [[..2..][.5]].
Like in your example making weight smaller actually give more space for layout.
Try to change background color of the middle layout to have better grasp what space exacly is given to your layouts.
Unlucky on my computer your code works normally so I can't help more than that.

Button size and padding within RelativeLayout

I'm attempting to create a a Heading + button similar to the Google Music App, e.g. where there is a "Songs" Header on the Left and then on the right there is a Button with the text "X more"..
I've using a RelativeLayout for the TextView and Button
My problem is that the button is taking up the size of the layout that contains the text the height is all wrong and the padding doesn't seem to do anything.
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
[REMOVED for clarity]
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#color/list_foreground"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:text="#string/photos"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Button
android:id="#+id/photo_button"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:background="#color/actionbar_background"
android:padding="10dp"
android:text="test" />
</RelativeLayout>
What am I doing wrong here?

RelativeLayouts are designed to have children in the layout "relative" to each other. In other words, if you want the Button to the right of the Textview, you need to tell it.
Because you are aligning relative to the parent LEFT / RIGHT, it appears that things are "kind of" working.
You may be better off with a LinearLayout, depending on your needs. LinearLayouts use "orientation" not RelativeLayouts.
You should look over some tutorials (like this one: http://mobile.tutsplus.com/tutorials/android/android-layout/) but ultimately you will probably put your button in first and then your text view so that the textview content will wrap appropriately.

To get the same effect as the Music App I ended up using a RelativeLayout but instead of a Button I'm using another TextView, this is giving the impression it's a button but it gives me more scope to format the background etc. I think just setup a OnClickListener in the code
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/photo_title">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="10dp"
android:text="#string/photos"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/more_photo_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="10dp"
android:background="#color/actionbar_background"
android:paddingLeft="5dp"
android:paddingRight="5dp"
android:text="10 MORE"
android:textColor="#color/button_text"
android:textSize="12sp" />
</RelativeLayout>

Unable to specify the alignComponent for an ImageButton

I'm trying to set my TextView to the left of an ImageButton, but I can't seems to find this option.
I was expecting to use something like android:layout_alignLeft, but this option is missing.
I've tried to google the issue, but couldn't find any relative results.
Without it my TextView overlaps the ImageButton and I want to avoid it.
UPDATE
The full xml code is too complex, but here is the important part of it:
<FrameLayout
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_alignParentLeft="true"
android:background="#color/white"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:layout_toLeftOf="#+id/frameLayoutBalanceClosed">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/button_edit_nickname"
android:id="#+id/card_closed_control_editNickname" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/card_closed_description_nickname"
android:layout_margin="8dp" android:layout_gravity="left"/>
</FrameLayout>

I think what you need is a RelativeLayout. You can specify your TextView to the left of your ImageView with it's specifications. Your code would look something like this:
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<TextView
android:id="#+id/text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_toLeftOf="#+id/imagebutton1" />
<ImageButton
android:id="#+id/imagebutton1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
The reason FrameLayout isn't working is because it's purpose is to overlay items on top of each other, which wouldn't work at all!
If that isn't what you're looking for, you could also use a TableLayout in which items are arranged in columns.

Android ScrollView is not working

This is my .xml file where I have used two scrollview,in Input Edittext and onether in output TextView. What is wrong here...It is not working in android device.
Another problem is that when I turn my device it only shows the input text area. The output text area goes down.I want to see the half screen of input and half screen of output area.
How to fix it??
Thanks
<?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:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="35dp"
android:orientation="horizontal" >
<Button
android:id="#+id/test"
android:layout_width="60dp"
android:layout_height="38dp"
android:text="#string/test" />
<Button
android:id="#+id/rdf"
android:layout_width="60dp"
android:layout_height="38dp"
android:text="#string/rdf" />
<Button
android:id="#+id/load"
android:layout_width="75dp"
android:layout_height="38dp"
android:text="#string/load" />
<Button
android:id="#+id/clear"
android:layout_width="60dp"
android:layout_height="38dp"
android:text="#string/clear" />
<Button
android:id="#+id/close"
android:layout_width="fill_parent"
android:layout_height="38dp"
android:text="#string/close" />
</LinearLayout>
<ScrollView
android:id="#+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<EditText
android:id="#+id/input"
android:layout_width="0dp"
android:layout_height="175dp"
android:layout_weight="1"
android:background="#fff"
android:ems="10"
android:gravity="top|left"
android:textSize="14dp"
android:inputType="textMultiLine" >
<requestFocus />
</EditText>
</LinearLayout>
</ScrollView>
<Button
android:id="#+id/run"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/run" />
<ScrollView
android:id="#+id/scrollView2"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/output"
android:layout_width="match_parent"
android:layout_height="225dp"
android:background="#fff"
android:text="#string/output"
android:textColor="#1e90ff" />
</LinearLayout>
</ScrollView>
</LinearLayout>

Try setting layout_weight=1 and layout_height=0dp for the two scroll views instead of their
contents.

What is wrong here...It is not working in android device.
That's pretty vague. What were your expectations? What isn't working? In other words, please be a little more specific.
However, based on the layout code given, here are some recommendations:
Avoid hardcoding the size of views. You cannot make assumptions about screen size with the large variety of screen sizes, densities and devices out there. Also, even if you're able to make the layout look nice in portrait mode, it'll probably be not even close to that in landscape.
If you're going to put just a single View in a ScrollView, there's no need to wrap it in a ViewGroup container; just set the View directly, without nesting it again and added an extra layer of complexity to the view hierarchy.
There's no need to wrap a TextView or EditText with a ScrollView, as both views are scrollable by itself.
Regarding your second question: you can prevent Android from extracting all UI components when there's little layout estate left with the keyboard popped up. You'll need to set the IME_FLAG_NO_EXTRACT_UI flag on the EditText, or in xml: android:imeOptions="flagNoExtractUi".
I do like to point out that there's a reason Android has this behaviour by default. In most cases it hardly makes sense to force a tiny part of the UI to be visible, even more as whatever is being typed by the user is probably what really matters.

LinearLayout text wrap problem when having two buttons of same size plus one stretched in the center

Looks like there's a plenty of questions about centering, same size etc, but so far I didn't find the exactly my case so I dare to ask :)
What I need is a layout of three buttons like this:
[ previous ][*select*] [ next ]
where [previous] and [next] buttons are of the same size (i.e. in this case, size of the [previous] button as it is bigger), and the [*select*] button should stretch to occupy all of the available width.
Following the hints of making two buttons in LinearLayout same sized, i came up with the following xml file:
<LinearLayout
android:id="#+id/button_bar"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:orientation="horizontal" >
<Button
android:layout_width="0dip"
android:layout_height="fill_parent"
android:layout_weight="1"
android:text="Previous" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="2"
android:text="Select" />
<Button
android:layout_width="0dip"
android:layout_height="fill_parent"
android:layout_weight="1"
android:text="Next" />
</LinearLayout>
This almost works :)
Except one thing: instead of making Next button to match the size of Previous button, android makes Previous button to be the size of the Next :)
And because of this the text "Previous" gets wrapped in two lines, like
Previ
ous
Dunno if this is a bug or not, but can you advice me a workaround or some another way to achive the desired layout?
Thank you!

I'd suggest using a RelativeLayout
<RelativeLayout
android:id="#+id/buttons"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:clickable="false">
<Button
android:id="#+id/previous"
android:layout_width="30dp"
android:layout_height="wrap_content"
android:text="Previous"
android:layout_alignParentLeft="true"/>
<Button
android:id="#+id/next"
android:layout_width="30dp"
android:layout_height="wrap_content"
android:text="Next"
android:layout_alignParentRight="true"/>
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Select"
android:layout_toRightOf="#id/previous"
android:layout_toLeftOf="#id/next" />
</RelativeLayout>
This should work.

If you are including "android:layout_weight" you should give either "android:layout_width" or "android:layout_height" as "fill_parent"
modify your code like this
<LinearLayout
android:id="#+id/button_bar"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:orientation="horizontal" >
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="2"
android:text="Previous" />
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1.5"
android:text="Select" />
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="2"
android:text="Next" />

In that sort of case I would go for a TableLayout, in which you have one row, and a weight of 1 for EACH button. and the stretchColumn attribute put to column 1. Does this make any difference?

I'm not sure if you can match a size to some other besides by doing this in code. The easiest solution is probably adjusting the previous and next button widths in dp/sp units until they look good and have the select button be the only one with the layout_weight attribute.