Develop Reference

Android App 50 percent width

I am trying to build a little Android App and I need two LinearLayout side by side. (50/50)
How it looks:
http://i.stack.imgur.com/C9yCF.png
I already try to use: android:layout_width="0dp" android:layout_weight="1" but it didn't work.
This is my XML:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/part">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="9pt"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:baselineAligned="true"
android:background="#ff7f7f7f"
android:id="#+id/head">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="123456789"
android:id="#+id/textView"
android:paddingStart="3pt"
android:paddingLeft="3pt"
android:textColor="#ffffffff"
android:singleLine="false" />
</LinearLayout>
<LinearLayout
android:id="#+id/left"
android:orientation="vertical"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentBottom="true"
android:layout_below="#+id/head"
android:background="#ffff0100" >
</LinearLayout>
<LinearLayout
android:id="#+id/right"
android:orientation="vertical"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="fill_parent"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_below="#+id/head"
android:background="#fffcff00" />
How it should look:
http://i.stack.imgur.com/tup01.png

Have one more LinearLayout with horizontal orientation below your #+id/head LinearLayout.
Set its width to match_parent. Keep the last two LinearLayouts inside the new LinearLayout and have android:layout_weight=0.5 for both. Something like:
<RelativeLayout>
<LinearLayout> </LinearLayout>
<LinearLayout
...
android:orientation:"horizontal"/>
<LinearLayout
android:weight="0.5"
android:width="0dp"
... />
</LinearLayout>
<LinearLayout
android:weight="0.5"
android:width="0dp"
... />
</LinearLayout>
</LinearLayout>
</RelativeLayout>

You can't use layout_weight with RelativeLayouts children. Put/Wrap both LinearLayouts in another LinearLayout.

Hey try this code...
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/part"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:id="#+id/head"
android:layout_width="fill_parent"
android:layout_height="9pt"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:background="#ff7f7f7f"
android:baselineAligned="true"
android:orientation="vertical" >
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="3pt"
android:paddingStart="3pt"
android:singleLine="false"
android:text="123456789"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="#ffffffff" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/head"
android:orientation="horizontal" >
<LinearLayout
android:id="#+id/left"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="#ffff0100"
android:orientation="vertical" >
</LinearLayout>
<LinearLayout
android:id="#+id/right"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="#fffcff00"
android:orientation="vertical" />
</LinearLayout>

Android - Two buttons in same line filling the whole width

I have a little problem defining a Relative Layout. I have a List View with scroll and two buttons always visible at the bottom of the list view. I just would like my two button have 50% of the width, filling the line. This is my code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="#+id/testbutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:text="Save" />
<Button
android:id="#+id/cancelButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_toRightOf="#+id/testbutton"
android:text="Cancel"/>
<ListView android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/LstPeriodOptions"
android:layout_alignParentTop="true"
android:layout_above="#id/testbutton" />
</RelativeLayout>
I tried to introduce the buttons in a Linear Layout and give the gravity=1 with width=0dp but in that case the ListView dissapears. Could you help me please?
Sorry for my english. This is the result I would like to have:
Thanks a lot, best regards.
EDIT: This is what I tried with Linear Layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
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="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/container" >
<Button
android:id="#+id/testbutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:text="Guardar" />
<Button
android:id="#+id/cancelButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_toRightOf="#+id/testbutton"
android:text="Cancelar"/>
</LinearLayout>
<ListView android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/LstPeriodOptions"
android:layout_alignParentTop="true"
android:layout_above="#id/container" />
</RelativeLayout>

Did you try with your LinearLayout in this way because this should work. Note all of the property changes. Since I don't know how yours was, I can't point out all of the differences.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:id="#+id/btnLL"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true">
<Button
android:id="#+id/testbutton"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Save" />
<Button
android:id="#+id/cancelButton"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Cancel"/>
</LinearLayout>
<ListView android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/LstPeriodOptions"
android:layout_above="#id/btnLL" />
</RelativeLayout>

Try out as below to set your button in LinearLayout and set it below your ListView:
<LinearLayout
android:id="#+id/laytbtns"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_below="#+id/LstPeriodOptions" >
<Button
android:id="#+id/testbutton"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginRight="5dp"
android:layout_weight="1"
android:text="Save"/>
<Button
android:id="#+id/cancelButton"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_weight="1"
android:text="Cancel" />
</LinearLayout>

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:orientation="vertical" >
<ListView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:id="#+id/LstPeriodOptions"
android:layout_above="#id/testbutton" />
<LinearLayout
android:id="#+id/laytbtns"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_below="#+id/LstPeriodOptions" >
<Button
android:id="#+id/testbutton"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginRight="5dp"
android:layout_weight="1"
android:text="Save"/>
<Button
android:id="#+id/cancelButton"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_weight="1"
android:text="Cancel" />
</LinearLayout>
</LinearLayout>

Linear Layout weight not working in android

I have a problem in my android layout.
I have an Image as following contains two parts:
(green border) will contains a descriptive meaning
(red border) I have to position a text in this part to be centered
I want the text to be in the bottom 1/3 of the image.
I have tried to make it programmatically but it doesn't work as I can't get (x, y, w, h) of an Image except it has rendered to the screen.
I have tried also the following code:
<RelativeLayout
android:id="#+id/item1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:layout_weight="1" >
<ImageView
android:id="#+id/item1_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:adjustViewBounds="true"
android:src="#drawable/item1_icon" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:weightSum="3" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="2" >
</LinearLayout>
<TextView
android:id="#+id/item1_title"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:ellipsize="end"
android:gravity="center"
android:maxLength="10"
android:singleLine="true"
android:text="My Day"
android:textColor="#android:color/white"
android:textStyle="bold" />
</LinearLayout>
</RelativeLayout>
How can I do that?

Note that the layout_weight attribute is assigned to the RelativeLayout:
<RelativeLayout
android:id="#+id/item1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:layout_weight="1" >
It won't work this way. Only a LinearLayout can have a layout_weight attribute. For RelativeLayout it is ignored.

I guess that you forgot to add this namespace to root view of your layout:
xmlns:android="http://schemas.android.com/apk/res/android"
And also I guess your problem will be solved if add it to your code.I added that to your code and try it.It was true.This is it's all:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/item1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:layout_weight="1" >
<ImageView
android:id="#+id/item1_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:adjustViewBounds="true"
android:src="#drawable/ic_launcher" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:weightSum="3"
>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="2"
android:background="#android:color/white" >
</LinearLayout>
<TextView
android:id="#+id/item1_title"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:ellipsize="end"
android:gravity="center"
android:maxLength="10"
android:singleLine="true"
android:text="My Day"
android:textColor="#android:color/white"
android:textStyle="bold" />
</LinearLayout>
</RelativeLayout>

This should work
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/item1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="5dp">
<ImageView
android:id="#+id/item1_icon"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:src="#drawable/ic_launcher" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="2"
android:background="#android:color/white" >
</LinearLayout>
<TextView
android:id="#+id/item1_title"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:ellipsize="end"
android:gravity="center"
android:maxLength="10"
android:singleLine="true"
android:text="My Day"
android:textColor="#android:color/white"
android:textStyle="bold" />
</LinearLayout>
</LinearLayout>

3 layouts - middle is flexible

I need the following thing:
3 layouts:
Header
Content
Footer
Header must be on the top footer must be sticked to the bottom (android:layout_alignParentBottom="true").
But how to make middle to occupy the whole other screen? Thanks.

Here is my solution (with android:layout_weight and ScrollView):
<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="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#DDDDDD"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Header"
tools:ignore="HardcodedText" />
</LinearLayout>
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="3" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Content"
tools:ignore="HardcodedText" />
</ScrollView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#DDDDDD"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Footer"
tools:ignore="HardcodedText" />
</LinearLayout></LinearLayout>
And the result picture :

Hi Use the following lines
<?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" >
<LinearLayout
android:id="#+id/button1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:text="Button" >
<Button
android:id="#+id/button2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Header" />
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_above="#+id/linearfooter"
android:layout_below="#+id/button1"
android:background="#android:color/darker_gray"
>
</LinearLayout>
<LinearLayout
android:id="#+id/linearfooter"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:text="Button" >
<Button
android:id="#+id/button2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="footer" />
</LinearLayout>
</RelativeLayout>
hope this helps you.

Use a height of 0dp and
android:layout_weight
set to 1

Finally I've got the next solution:
To the middle layout I added:
<LinearLayout
android:id="#+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#id/footer"
android:layout_below="#id/header"
android:layout_weight="1">
And it works!

android layout: how to write this one?

I want an activity with below layout:
top button
middle(scroll view)
bottom button
I want the bottom button to attach to the bottom of the activity view, and the middle part occupies the rest of the space.
How I can write the layout xml file?
Below doesn't work:
<?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">
<LinearLayout android:focusable="true"
android:focusableInTouchMode="true" android:layout_width="0px"
android:layout_height="0px" />
<LinearLayout android:orientation="vertical"
android:layout_width="fill_parent" android:weightSum="1" android:layout_height="wrap_content">
<LinearLayout android:orientation="horizontal"
android:layout_width="fill_parent" android:layout_height="wrap_content"
android:weightSum="1">
<EditText android:id="#+id/edit_search"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:lines="1" android:hint="发微博内容" android:layout_weight="0.9" />
<Button android:layout_height="wrap_content" android:text="Search"
android:layout_width="wrap_content" android:id="#+id/search_btn"
android:layout_weight="0.1"></Button>
</LinearLayout>
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content" android:id="#+id/TextView01"
android:paddingTop="5dip" />
<ListView android:layout_width="fill_parent"
android:id="#+id/lv01" android:layout_height="390dp">
</ListView>
<Button android:id="#+id/create_new_btn"
android:layout_height="wrap_content" android:text="我要评论" android:layout_gravity="bottom"
android:layout_width="fill_parent"></Button>
</LinearLayout>
</LinearLayout>

For that case, just take a RelativeLayout, its better for this case and you don't need to take any sub-layout.
Just try this once and post your XML layout here for the further improvement.
From your xml layout code, i can assume, you just want to have:
EditText+Button=>Top,
TextView+ListView=>Middle,
Create New button=>Bottom,
is this the case?

Keep it simple, go with LinearLayout, and play with the weights:
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0">
</Button>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1">
<!-- Stuff in scroll view -->
</ScrollView>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0">
</Button>
</LinearLayout>

#ParashMayani is right..
Here is the implementation :
<LinearLayout android:focusable="true"
android:focusableInTouchMode="true" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:id="#+id/relLayout" android:orientation="horizontal" >
<EditText android:id="#+id/edit_search"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:lines="1" android:hint="Hello" android:layout_weight="0.7"/>
<Button android:layout_height="wrap_content" android:text="Search"
android:layout_weight="0.3" android:layout_width="wrap_content" android:id="#+id/search_btn" />
</LinearLayout>
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content" android:id="#+id/TextView01"
android:paddingTop="5dip" android:layout_below="#id/relLayout"/>
<Button android:id="#+id/create_new_btn"
android:layout_height="wrap_content" android:text="我要评论" android:layout_gravity="bottom"
android:layout_width="fill_parent" android:layout_alignParentBottom="true"/>
<ListView android:layout_width="fill_parent"
android:id="#+id/lv01" android:layout_height="0dp" android:layout_above="#id/create_new_btn" android:layout_below="#id/TextView01" />

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button android:id="#+id/button1" android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="Button" android:layout_alignParentTop="true" android:layout_alignParentLeft="true"></Button>
<Button android:id="#+id/button2" android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="Button" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true"></Button>
<ScrollView android:id="#+id/scrollView1" android:layout_height="wrap_content" android:layout_width="match_parent" android:layout_below="#+id/button1" android:layout_above="#+id/button2">
<LinearLayout android:id="#+id/linearLayout1" android:layout_width="match_parent" android:layout_height="match_parent"></LinearLayout>
</ScrollView>
</RelativeLayout>
I think something like that would work. The important part in that layout is the android:layout_below and android:layout_above. You can replace the ScrollView with other layouts such as ListView and it will remain below the first button and above the second regardless of how big it gets. Likewise, the buttons have the attributes android:layout_alignParentTop="true" and android:layout_alignParentBottom="true" which will keep them to the top and the bottom of the RelativeView respectively.