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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's style is adding unknown attribute - Android

I am trying to achieve the look of Facebook's event page and am having trouble copying their three buttons that say if a person is going to an event.
I am trying to achieve this,
Mine currently looks like this,
This is the XML for the buttons
<LinearLayout
android:id="#+id/button_holder"
android:layout_alignParentBottom="true"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="3"
android:layout_marginLeft="10dp"
android:layout_marginStart="10dp"
android:paddingBottom="10dp">
<Button
android:id="#+id/button_going"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textSize="14sp"
android:textColor="#color/secondary_text"
android:text="Going"
android:background="#drawable/item_left_button_background"/>
<Button
android:id="#+id/button_maybe"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textSize="14sp"
android:textColor="#color/secondary_text"
android:text="Maybe"
android:background="#drawable/item_middle_button_background"/>
<Button
android:id="#+id/button_decline"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textSize="14sp"
android:textColor="#color/secondary_text"
android:text="Decline"
android:background="#drawable/item_right_button_background"/>
</LinearLayout>
I do not know where the extra Padding or Margin is coming from above and below my buttons. I have tried android:padding="0dp" and android:layout_margin="0dp" on the buttons but it had no effect.
My best guess is it might have something to do with the layout_weight attribute. This may give the buttons a certain height based on their width, if this is the case then how can I make the buttons shorter?

AS you are applying the background item_left_button_background so that must be an image or selector which consists images those images have a specific height. When you give the button height as wrap_content it will take by default what is height of the image so as per my suggestion give a specific height to the button or create the background images as per your required sizes

Button layout_height=wrap_content inside linear layout has height much bigger then wrap_content

I have LinearLayout with TextView and Button. I set layout_height attribute to wrap_content but layout_height has much bigger size. If I remove this button then all is alright. I try to decrease button text size but frame of the button still the same. I don't want hardcode button size. What can be the reason this strange result?
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="1" >
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="#dimen/left_margin"
android:layout_marginTop="#dimen/top_margin"
android:layout_weight=".3"
android:text="#string/contact" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="0.7"
android:layout_marginLeft="#dimen/left_margin"
android:layout_marginTop="#dimen/top_margin"
android:orientation="horizontal"
android:weightSum="1" >
<TextView
android:id="#+id/contact"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:gravity="center_vertical"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/contact" android:textSize="#dimen/button_font_size"/>
</LinearLayout>

Button has background and other layout properties and does not seem possible to reduce its height. An option would be to use a TextView with custom style and handle click event so that it behaves like a Button.
Example:
<TextView
android:layout_height="wrap_content"
android:background="#ddd"
android:padding="6dp"
android:layout_width="wrap_content"
android:text="Contact" />
It requires some work and time spent to style the TextView properly, but if you have no other choice, it may do the trick for you.

I had this issue as well when using a button, you can manually set the height and width, but I also have not found a set way to reduce the wrap_content size.
android:layout_width="40dp"
android:layout_height="30dp"

This is because of minimum height of a button. Set android:minHeight="1dp" or any other size to make it happen.

Center multiple items in a RelativeLayout without putting them in a container?

I have a RelativeLayout containing a pair of side-by-side buttons, which I want to be centered within the layout. I could just put the buttons in a LinearLayout and center that in the RelativeLayout, but I want to keep my xml as clean as possible.
Here's what I tried, this just puts the "apply" button in the center and the "undo" button to the left of it:
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15sp">
<TextView
android:id="#+id/instructions"
android:text="#string/instructions"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="15sp"
android:layout_centerHorizontal="true"
/>
<Button
android:id="#+id/apply"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="#string/apply"
android:textSize="20sp"
android:layout_below="#id/instructions"
/>
<Button
android:id="#+id/undo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="#string/undo"
android:textSize="20sp"
android:layout_toLeftOf="#id/apply"
android:layout_below="#id/instructions"
/>
</RelativeLayout>

android:gravity will align the content inside the view or layout it is used on.
android:layout_gravity will align the view or layout inside of his parent.
So adding
android:gravity="center"
to your RelativeLayout should do the trick...
Like this:
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_marginTop="15sp">
</RelativeLayout>

Here is an extension of BrainCrash's answer. It is a non nested option that groups and centers all three horizontally and vertically. In addition, it takes the top TextView and centers it horizontally across both buttons. If desired, you can then center the text within the TextView with android:gravity="center". I also removed the margins, added color, and set the RelativeLayout height to fill_parent to highlight the layout. Tested on API 11.
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:background="#android:color/black"
>
<TextView
android:id="#+id/instructions"
android:text="TEST"
android:textSize="20sp"
android:background="#android:color/darker_gray"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignLeft="#+id/undo"
android:layout_alignRight="#+id/apply"
android:gravity="center"
/>
<Button
android:id="#+id/apply"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="APPLY"
android:textSize="20sp"
android:layout_below="#id/instructions"
/>
<Button
android:id="#+id/undo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="UNDO"
android:textSize="20sp"
android:layout_toLeftOf="#id/apply"
android:layout_below="#id/instructions"
/>
</RelativeLayout>

android:layout_gravity="center"
will almost give what you're looking for.

Here is a combination of the above answer's that solved my specific situation:
Centering two separate labels within a layout that also includes a button in the left most position of the same layout (button, label, label, from left to right, where the labels are centered relative to the layout containing all three views - that is, the button doesn't push the labels off center).
I solved this by nesting two RelativeLayout's, where the outer most layout included the
Button and an Inner-RelativeLayout.
The Inner-RelativeLayout contained the two text labels (TextView's).
Here is a snippet that provides the details of how the centering and other layout stuff was done:
see: RelativeLayout Gravity not applied? and
Gravity and layout_gravity on Android
for the difference's between gravity and layout_gravity.
Tweak the paddingLeft on the btn_button1 Button to see that the TextView's do not move.
(My apologies to havexz for the downvotes. I was too hasty in thinking that just b/c your suggestions didn't solve the exact question being ask, that they do help to solve very similar situations (the answer here solves a very specific situation, and only the combination of all these answer's solved my problem. I tried upvoting, but it won't let me unless I edit the answer's, which I don't want to do.)
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/rl_outer"
android:layout_width="fill_parent"
android:layout_height="50dip"
android:background="#FF0000FF">
<Button
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/btn_button1"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:background="#FF00FF00"
android:text="<"
android:textSize="20sp"
android:paddingLeft="40dip"/>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/rl_inner"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:background="#FFFF00FF"
android:layout_centerInParent="true"
android:gravity="center">
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/tv_text1"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:background="#FF505050"
android:textSize="20sp"
android:textColor="#FFFFFFFF"
android:text="Complaint #"
android:gravity="center"/>
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/tv_text2"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:background="#FF505050"
android:textSize="20sp"
android:textColor="#FFFFFFFF"
android:layout_toRightOf="#id/tv_text1"
android:gravity="center"/>
</RelativeLayout>
</RelativeLayout>

LinearLayout is a good option. Other than that there are options like create an invisible view and center that and then align left button to the left it and right on the right of it. BUT those are just work arounds.

Making EditText and Button same height in Android

I have an EditText and a Button in my LinearLayout and I want to align them closely together so they see seem to belong together (edittext + micButton for speech input).
Now they don't have the same height and they aren't really aligned well (Button seems to be a little lower than the EditText). I know I can apply a negative margin like -5dp to make them come closer together, but is there perhaps a better way to do this?
Set them in a specific container/layout so that they will automatically have the same height and no margin between them?

Using relative layout you can stretch a view depending upon another views size without knowing the exact size of the other view.
Here is the code :
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
<Button
android:layout_width="100dp"
android:layout_height="100dp"
android:text="button"
android:id="#+id/but"/>
<EditText
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/but"
android:layout_alignBottom="#id/but"
android:layout_alignTop="#id/but"
/>
</RelativeLayout>
Check this link for reducing space between views :
https://groups.google.com/forum/?fromgroups#!topic/android-developers/RNfAxbqbTIk

Hmm, don't know why people bother so much with tables. Since the both Views are within a LinearLayout (presumable orientation=Horizontal), this command should center both within the layout:
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical" />
</LinearLayout>
Note: Since EditTexts and Buttons may orient their text slightly differently, you may have to do some tweaking (by changing margins or padding) to get the text to align properly.

I hope this solution might help for your scenario...Here is the code..
<RelativeLayout
android:id="#+id/rlLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:orientation="horizontal"
android:padding="3dp" >
<EditText
android:id="#+id/etId"
android:layout_width="fill_parent"
android:layout_height="50dip"
android:background="#c8c8c8"
android:hint="Edittext"
android:paddingLeft="20dip"
android:paddingRight="10dip"
android:textColor="#000000" />
<RelativeLayout
android:id="#+id/rlLayoutid"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_alignRight="#+id/etId" >
<Button
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_alignParentRight="true"
android:layout_marginRight="14dp"
android:layout_marginTop="10dp"
android:background="#drawable/calender" />
</RelativeLayout>
</RelativeLayout>

# Daniel Here You can use layout weight and weight sum
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center"
android:weight_sum=2
>
<Button
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight=1
android:text="button"
android:id="#+id/but"/>
<EditText
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight=1
/>
</LinearLayout>

Android tries to automatically level everything off of the text and not the buttons themselves.
Took me forever to finally figure it out. Its really simple. Should fix it.
myButton.setGravity(Gravity.CENTER_VERTICAL);
or if they are in a row.. attach the buttons to a table row, then.
myTableRow.setGravity(Gravity.CENTER_VERTICAL);