Android Layout - layoutweight and weightsum - android

I need to build a layout with the set of linear layouts. The layout has to occupy a defined percentage of the screen. I need to do this to have a similar look in all the devices.
Issue:
I have a textview in the top right layout (green color box ). Whenever I add some data in the textview it disturbs the entire layout as shown below in the 2nd image. But I need to have the data wraps automatically when it reaches the right end of the screen/layout.
Please help me to resolve this. Thanks In Advance
Image1 - Graphical view as per the XML shown below
Image2 - Shows how the layout automatically changes, when I add some data in the textView
xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/background"
android:orientation="vertical"
android:weightSum="100">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_weight="91"
android:weightSum="100">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="40"
android:weightSum="235">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center"
android:background="#ff0000"
android:layout_weight="100">
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#000000" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#ffff00"
android:layout_weight="45">
<ViewFlipper
android:id="#+id/view_flipper"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/tvItemName" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
</LinearLayout>
</ViewFlipper>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#ffffff"
android:layout_weight="90">
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="60"
android:weightSum="100">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="30"
android:background="#00ab00"
android:weightSum="100">
<TextView
android:id="#+id/textView1"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:textColor="#000000"
android:text="Test data" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#cd00ab"
android:layout_weight="70">
</LinearLayout>
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#ab0000"
android:layout_weight="9">
</LinearLayout>
</LinearLayout>


Start your layout_width or layout_height as 0dp instead of wrap_content. (If it's in a vertical layout, layout_height should be 0dp; if it's in a horizontal layout, layout_width should be 0dp)
The layout_weight describes how to divide the remaining space after the layout_widths/layout_heights have been assigned.
Note that wrap_content doesn't mean "make the text wrap"; it means set that dimension to the "preferred" dimension of the view.


Use this XML file. I have made the changes for you.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/background"
android:orientation="vertical"
android:weightSum="100" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="91"
android:orientation="horizontal"
android:weightSum="100" >
<!-- Below is the first modification to layout_width -->
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="40"
android:orientation="vertical"
android:weightSum="235" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="100"
android:background="#ff0000"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#000000" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="45"
android:background="#ffff00"
android:orientation="vertical" >
<ViewFlipper
android:id="#+id/view_flipper"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/tvItemName" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
</LinearLayout>
</ViewFlipper>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="90"
android:background="#ffffff"
android:orientation="vertical" >
</LinearLayout>
</LinearLayout>
<!-- Below is the second modification to layout_width -->
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="60"
android:orientation="vertical"
android:weightSum="100" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="30"
android:background="#00ab00"
android:orientation="vertical"
android:weightSum="100" >
<TextView
android:id="#+id/textView1"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:text="Test data Test dataTest dataTest dataTest dataTest dataTest dataTest dataTest dataTest dataTest dataTest dataTest dataTest dataTest dataTest dataTest dataTest dataTest data"
android:textColor="#000000" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="70"
android:background="#cd00ab"
android:orientation="vertical" >
</LinearLayout>
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="9"
android:background="#ab0000" >
</LinearLayout>
</LinearLayout>
It looks fine to me. check out the below snapshot.

Related

Android Layout Weight Exactly Twice Of Others

I would like to simply divide a Linear Layout to 3 piece. I did something as in the code below. If I change the weight of second inner layout anything else than 2, it works. But if I change it to 2(two), the second inner layout doesn't appear in the design ?
<LinearLayout
android:id="#+id/Main"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
android:background="#ffffff"
android:orientation="vertical"
android:gravity="center"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="2"
android:gravity="center"
>
<ImageView
android:id="#+id/HomePageIcon"
android:layout_height="match_parent"
android:layout_width="wrap_content"
android:adjustViewBounds="true" />
</LinearLayout>
<LinearLayout
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingHorizontal="33dp"
android:paddingBottom="30dp"
>
</LinearLayout>

Use it like below height set to 0dp when orientation is vertical.
<LinearLayout
android:id="#+id/Main"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
android:background="#ffffff"
android:orientation="vertical"
android:gravity="center"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:background="#color/colorAccent"
android:layout_weight="1"
>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="2"
android:background="#color/background_dark"
android:gravity="center"
>
<ImageView
android:id="#+id/HomePageIcon"
android:layout_height="match_parent"
android:layout_width="wrap_content"
android:adjustViewBounds="true" />
</LinearLayout>
<LinearLayout
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="0dp"
android:background="#color/colorPrimaryDark"
android:orientation="vertical"
android:paddingHorizontal="33dp"
android:paddingBottom="30dp"
>
</LinearLayout>

Use the Constraint Layout and forget the Linear and Relative layout.

Pls try this,
<LinearLayout
android:id="#+id/Main"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
android:background="#ffffff"
android:orientation="vertical"
android:gravity="center"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center"
>
<ImageView
android:id="#+id/HomePageIcon"
android:layout_height="match_parent"
android:layout_width="wrap_content"
android:adjustViewBounds="true" />
</LinearLayout>
<LinearLayout
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="vertical"
android:paddingHorizontal="33dp"
android:paddingBottom="30dp"
>
</LinearLayout>

As you are using layout_weight that means your inner layouts will take the height as much as is available to it. So, in that case there is no need of using layout_height = "wrap_content" just change it to android:layout_height="0dp"
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/Main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:gravity="center"
android:orientation="vertical"
android:weightSum="4">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"></LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="2"
android:gravity="center">
<ImageView
android:id="#+id/HomePageIcon"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:adjustViewBounds="true" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="vertical"
android:paddingBottom="30dp"
android:paddingHorizontal="33dp"></LinearLayout>
</LinearLayout>

When you are using weight than use 0dp to android:layout_width or android:layout_height which you want for affect using weight. And its good to use android:weightSum in parent layout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/Main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:gravity="center"
android:orientation="vertical"
android:weightSum="4">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"></LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="2"
android:gravity="center">
<ImageView
android:id="#+id/HomePageIcon"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:adjustViewBounds="true" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="vertical"
android:paddingBottom="30dp"
android:paddingHorizontal="33dp"></LinearLayout>

Position four relative layouts equally on screen

I'm trying to position four RelativeLayouts on the screen equally as shown on the image below. I just can't seem to get anywhere. Each one will contain a text label and a button centred in their quadrant. I've tried placing the four inside RelativeLayout with the alignComponent values set appropriately and alignParent values set to Left/Right and Top/Bottom. I've also tried with just the alignComponent set and just alignParent set but to no avail.
It should look like this,

Since you want to use RelativeLayout, the easiest way is to use vertical and horizontal struts (which are invisible) and use those as anchors for your four RelativeLayouts children. This approach is definitely more efficient than nested LinearLayouts with weights. You should probably read this before nesting LinearLayouts with weights.
A snippet from the above link:
Layout weights require a widget to be measured twice. When a LinearLayout with non-zero weights is nested inside another LinearLayout with non-zero weights, then the number of measurements increase exponentially.
So for using RelativeLayouts with struts, your XML could be like this:
<RelativeLayout 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"
tools:context="${relativePackage}.${activityClass}" >
<View
android:id="#+id/horizontalStrut"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_centerVertical="true" />
<View
android:id="#+id/verticalStrut"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_centerHorizontal="true" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#id/horizontalStrut"
android:layout_toLeftOf="#id/verticalStrut"
android:background="#color/red" >
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#id/horizontalStrut"
android:layout_toRightOf="#id/verticalStrut"
android:background="#color/black" >
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/horizontalStrut"
android:layout_toLeftOf="#id/verticalStrut"
android:background="#color/blue" >
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/horizontalStrut"
android:layout_toRightOf="#id/verticalStrut"
android:background="#color/green" >
</RelativeLayout>
</RelativeLayout>

Try This Layout.. It Could Help You...
<?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="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal" >
<RelativeLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="#color/black" >
<!-- put your stuff here -->
</RelativeLayout>
<RelativeLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="#color/red" >
<!-- put your stuff here -->
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal" >
<RelativeLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="#color/white" >
<!-- put your stuff here -->
</RelativeLayout>
<RelativeLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="#color/green" >
<!-- put your stuff here -->
</RelativeLayout>
</LinearLayout>
</LinearLayout>
Sample Output..

You can easily done it using LinearLayout or tableLayout,
SAmple shows using LinearLayout
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="horizontal"
android:background="#FF0000" >
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="horizontal"
android:background="#331323" >
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="horizontal"
android:background="#662200" >
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="horizontal"
android:background="#FF8800" >
</LinearLayout>
</LinearLayout>

You can use LinearLayout then set android:weightSum for your parent layout then you can set now your layout_weight for your quadrants.Like this..
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum = "2"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:weightSum="2"
android:orientation="horizontal" >
<RelativeLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="#color/black" >
</RelativeLayout>
<RelativeLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="#color/red" >
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:weightSum="2"
android:orientation="horizontal" >
<RelativeLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="#color/white" >
</RelativeLayout>
<RelativeLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="#color/green" >
</RelativeLayout>
</LinearLayout>

<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="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#0B6121"
android:orientation="vertical" >
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="vertical"
android:background="#DF013A">
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="vertical"
android:background="#0080FF">
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#A901DB"
android:orientation="vertical" >
</LinearLayout>
</LinearLayout>

Percentage Layout Android

Hello I am new in Android, and my English is bad. I try it.
I want to divide my layout in 3 diferent sizes.
<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:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1" >
<TextView
android:id="#+id/txt"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:text="Esto es una mierda de Relative Layout" />
</RelativeLayout>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="2">
<Button
android:id="#+id/btn1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="bottom"
android:text="Button" />
</RelativeLayout>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1">
<Button
android:id="#+id/btn"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="top"
android:text="Button" />
</RelativeLayout>
</LinearLayout>
</LinearLayout>
My code should display three columns, the center column being twice the size of the side columns. If I set all the layouts with the same layout weight, they all display correctly, but with the same size.
However, when I set the center column with a different size value (in the layout weight) it dissapears from the screen.
What can I do to display my layouts in three columns with different sizes?
If anybody can help me. Thanks for reading.

use this structure:
<!-- parent layout-->
<LinearLayout
android:weightSum="1">
<!-- children layouts -->
<RelativeLayout
android:weight="0.25"
></RelativeLayout>
<RelativeLayout
android:weight="0.5"
></RelativeLayout>
<RelativeLayout
android:weight="0.25"
></RelativeLayout>
</LinearLayout>

<LinearLayout
android:id="#+id/stupid_android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<View
android:layout_width="0dip"
android:layout_height="match_parent"
android:background="#FF0000"
android:layout_weight="1" />
<View
android:layout_width="0dip"
android:layout_height="match_parent"
android:background="#0000FF"
android:layout_weight="2" />
<View
android:layout_width="0dip"
android:layout_height="match_parent"
android:background="#00FF00"
android:layout_weight="1" />
</LinearLayout>
</LinearLayout>

This is your modified code:
<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:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<RelativeLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" >
<TextView
android:id="#+id/txt"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:text="Esto es una mierda de Relative Layout" />
</RelativeLayout>
<RelativeLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="2" >
<Button
android:id="#+id/btn1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="bottom"
android:text="Button" />
</RelativeLayout>
<RelativeLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" >
<Button
android:id="#+id/btn"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="top"
android:text="Button" />
</RelativeLayout>
</LinearLayout>
</LinearLayout>
Use match_parent instead fill_parent. Althought you write program for API 8-.

Do it like this :
It's important to set the corresponding width/height to 0dp.
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:weightSum="4" >
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="column1" />
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="2"
android:text="column2" />
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="column3" />
</LinearLayout>

positioning layout in android

I have something like to this:
I want that when the relative_layout stretch to fill the screen, stretch layout_content (layout_header and layout_footer not resize).
And when the screen size is smaller than layouts then scrool
My code currently looks like this:
<ScrollView android:layout_width="fill_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/layout_header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center">
...
</LinearLayout>
<LinearLayout
android:id="#+id/layout_center"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_below="#+id/layout_header">
...
</LinearLayout>
<LinearLayout
android:id="#+id/layout_footer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_below="#+id/layout_center">
...
</LinearLayout>
</RelativeLayout >
</ScrollView>
Excuse my english, thank you very much. I Wear long time without this fix and have tried with different layout.

Try this..
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:id="#+id/layout_header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="top"
android:textSize="20dp" />
</LinearLayout>
<LinearLayout
android:id="#+id/layout_center"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="center"
android:textSize="20dp" />
</LinearLayout>
<LinearLayout
android:id="#+id/layout_footer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="bottom"
android:textSize="20dp" />
</LinearLayout>
</LinearLayout>
</ScrollView>

Place the ScrollView only for LinearLayout
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/layout_header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center">
...
</LinearLayout>
<ScrollView android:layout_width="fill_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<LinearLayout
android:id="#+id/layout_center"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_below="#+id/layout_header">
...
</LinearLayout>
</ScrollView>
<LinearLayout
android:id="#+id/layout_footer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_below="#+id/layout_center">
...
</LinearLayout>
</RelativeLayout >

How to set both width and height of layouts as percentages in android?

I need to create a horizontal layout as follows :
I can set the total width of the layout of C using android:layout_width="match_parent" but I'm completely stumped at setting the rest of the layouts. Any help is highly appreciated.
The whole app is set to run on a horizontal layout only, if that helps in decide what method to set the layouts.

<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"
android:weightSum="100" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="90"
android:orientation="horizontal"
android:weightSum="100" >
<LinearLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="50"
android:background="#FF0000" >
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="50"
android:background="#00FF00" >
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="10"
android:background="#FFFF00" >
</LinearLayout>
</LinearLayout>

The trick is to use LinearLayout's with a certain weight like this:
<?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"
android:weightSum="10">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:orientation="horizontal">
<View
android:id="#+id/view_A"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
<View
android:id="#+id/view_B"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
</LinearLayout>
<View
android:id="#+id/view_C"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="9" />
</LinearLayout>

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