Linear Layout and weight in Android

Question

I always read about this funny weight value in the Android documentations   Now I want to try it for the first time but it isn t working at all    As I understand it from the documentations this layout       lt LinearLayout      android layout width  fill parent       android layout height  wrap content       android orientation  horizontal  gt         lt Button         android text  Register          android id    id register          android layout width  wrap content          android layout height  wrap content          android padding  10dip          weight  1    gt         lt Button         android text  Not this time          android id    id cancel          android layout width  wrap content          android layout height  wrap content          android padding  10dip          weight  1    gt      lt  LinearLayout gt    should create two buttons that are horizontally aligned and share the space equally  The problem is the two buttons don t grow to fill the space    I would like the buttons to grow and fill the whole line  If both buttons are set to match parent only the first button is shown and fills the whole line

User · Answer

Substitute wrap content with fill parent

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This image summarizes the Linear layout     You can follow this link for more information on the topic  Just Maths - Views  View Groups and Layouts   Video Tutorial For Linear Layout   Width  Height  amp  Weights  Android Linear Layout Tutorial

User · Answer

Perhaps setting both of the buttons layout width properties to  fill parent  will do the trick   I just tested this code and it works in the emulator    lt LinearLayout android layout width  fill parent            android layout height  wrap content  gt        lt Button android layout width  fill parent          android layout height  wrap content          android layout weight  1          android text  hello world   gt        lt Button android layout width  fill parent          android layout height  wrap content          android layout weight  1          android text  goodbye world   gt    lt  LinearLayout gt    Be sure to set layout width to  fill parent  on both buttons

User · Answer

In the width field of button  replace wrap-content with 0dp  Use layout weight attribute of a view   android layout width  0dp      This is how your code will look like          lt LinearLayout  android layout width  fill parent   android layout height  wrap content   android orientation  horizontal  gt     lt Button     android text  Register      android id    id register      android layout width  0dp      android layout height  wrap content      android padding  10dip      android layout weight  1    gt     lt Button     android text  Not this time      android id    id cancel      android layout width  0dp      android layout height  wrap content      android padding  10dip      android layout weight  1    gt        lt  LinearLayout gt    layout weight is used to distribute the whatever left space into proportions    In this case  the two buttons are taking  0dp  width  So  the remaining space will be divided into 1 1 proportion among them  i e  the space will be divided equally between the Button Views

User · Answer

You have to write like this its Working for me       lt LinearLayout          android layout width  fill parent           android layout height  wrap content           android orientation  horizontal              android weightSum  2  gt             lt Button             android text  Register              android id    id register              android layout width  wrap content              android layout height  wrap content              android padding  10dip              android layout weight  1    gt             lt Button             android text  Not this time              android id    id cancel              android layout width  wrap content              android layout height  wrap content              android padding  10dip              android layout weight  1    gt

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3 things to remember    set the android layout width of the children to  0dp  set the android weightSum of the parent   edit  as Jason Moore noticed  this attribute is optional  because by default it is set to the children s layout weight sum  set the android layout weight of each child proportionally  e g  weightSum  5   three children  layout weight  1   layout weight  3   layout weight  1     Example        lt LinearLayout     android layout width  fill parent      android layout height  wrap content      android weightSum  5  gt        lt Button         android layout width  0dp          android layout height  wrap content          android layout weight  1          android text  1    gt        lt Button         android layout width  0dp          android layout height  wrap content          android layout weight  3          android text  2    gt        lt Button         android layout width  0dp          android layout height  wrap content          android layout weight  1          android text  3    gt        lt  LinearLayout gt    And the result

User · Answer

You are not setting the layout weight property  Your code reads weight  1  and it should read android layout weight  1

User · Answer

Try setting the layout width of both buttons to  0dip  and the weight of both buttons to 0 5

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lt LinearLayout         xmlns android  http   schemas android com apk res android          android id    id logonFormButtons          android layout width  fill parent          android layout height  wrap content          android baselineAligned  true                 android orientation  horizontal  gt            lt Button             android id    id logonFormBTLogon              android layout width  fill parent              android layout height  wrap content                          android text   string logon              android layout weight  0 5    gt            lt Button             android id    id logonFormBTCancel              android layout width  fill parent              android layout height  wrap content                          android text   string cancel              android layout weight  0 5    gt       lt  LinearLayout gt

User · Answer

In the above XML  set the android layout weight of the linear layout as 2   android layout weight  2

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lt LinearLayout             android layout width  match parent              android layout height  match parent              android layout gravity  center              android background   008  gt                lt RelativeLayout                 android id    id paneltamrin                  android layout width  match parent                  android layout height  wrap content                  android layout weight  1                  android gravity  center                    gt                   lt Button                     android id    id BtnT1                      android layout width  wrap content                      android layout height  150dp                      android drawableTop   android drawable ic menu edit                      android drawablePadding  6dp                      android padding  15dp                      android text  AndroidDhina                      android textColor   000                      android textStyle  bold    gt               lt  RelativeLayout gt                lt RelativeLayout                 android id    id paneltamrin2                  android layout width  match parent                  android layout height  wrap content                  android layout weight  1                  android gravity  center                   gt                   lt Button                     android layout width  wrap content                      android layout height  150dp                       android drawableTop   android drawable ic menu edit                      android drawablePadding  6dp                      android padding  15dp                      android text  AndroidDhina                      android textColor   000                      android textStyle  bold    gt                lt  RelativeLayout gt           lt  LinearLayout gt

User · Answer

Like answer of  Manoj Seelan  Replace android layout weight With android weight    When you use Weight with LinearLayout  you must add weightSum in LinearLayout and according to orientation of your LinearLayout you  must setting 0dp for Width Height to all LinearLayout s Children views  Example    If The orientation of Linearlayout is Vertical   then Set Width of all LinearLayout s Children views with 0dp    lt LinearLayout      android layout width  fill parent       android layout height  wrap content       android orientation  vertical       android weightSum  3  gt         lt Button         android text  Register          android id    id register          android layout width  0dp          android layout height  wrap content          android padding  10dip          android layout weight  2    gt         lt Button         android text  Not this time          android id    id cancel          android layout width  0dp          android layout height  wrap content          android padding  10dip          android layout weight  1    gt      lt  LinearLayout gt    If the orientation Linearlayout of is horizontal   then Set Height of all LinearLayout s Children views with 0dp     lt LinearLayout      android layout width  fill parent       android layout height  wrap content       android orientation  horizontal       android weightSum  3  gt         lt Button         android text  Register          android id    id register          android layout width  wrap content          android layout height  0dp          android padding  10dip          android layout weight  2    gt         lt Button         android text  Not this time          android id    id cancel          android layout width  wrap content          android layout height  0dp          android padding  10dip          android layout weight  1    gt      lt  LinearLayout gt

User · Answer

Plus you need to add this android layout width  0dp  for children views  Button views  of LinerLayout

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lt LinearLayout     android layout width  fill parent      android layout height  wrap content  gt        lt Button         android layout width  fill parent          android layout height  wrap content          android layout weight  2          android text  Button 1    gt        lt Button         android layout width  fill parent          android layout height  wrap content          android layout weight  3          android text  Button 2    gt        lt Button         android layout width  fill parent          android layout height  wrap content          android layout weight  2          android text  Button 3    gt        lt  LinearLayout gt

User · Answer

It s android layout weight  Weight can only be used in LinearLayout  If the orientation of linearlayout is Vertical  then use android layout height  0dp  and if the orientation is horizontal  then use android layout width    0dp   It ll work perfectly

User · Answer

LinearLayout supports assigning a weight to individual children  This attribute assigns an  importance  value to a view  and allows it to expand to fill any remaining space in the parent view  Default weight is zero   calculation to assign any Remaining Extra space between child   not the total space    space assign to child    child individual weight     sum of weight of every child in Linear Layout    Example  1    if there are three text boxes and two of them declare a weight of 1  while the third one is given no weight  0   then Remaining Extra space assign to   1st text box   1  1 1 0   2nd text box   1  1 1 0   3rd text box   0  1 1 0     Example  2    let s say we have a text label and two text edit elements in a horizontal row  The label has no layout weight specified  so it takes up the minimum space required to render  If the layout weight of each of the two text edit elements is set to 1  the remaining width in the parent layout will be split equally between them  because we claim they are equally important     calculation    1st label   0  0 1 1   2nd text box   1  0 1 1   3rd text box   1  0 1 1    If the first one text box has a layout weight of 1 and the second text box has a layout weight of 2  then one third of the remaining space will be given to the first  and two thirds to the second  because we claim the second one is more important     calculation    1st label   0  0 1 2   2nd text box   1  0 1 2   3rd text box   2  0 1 2

User · Answer

This is perfect answer of your problem     lt LinearLayout          xmlns android  http   schemas android com apk res android          android layout width  fill parent           android layout height  wrap content          android orientation  horizontal    gt           lt Button          android text  Register  android id    id register          android layout width  wrap content  android layout height  wrap content          android padding  10dip  weight  1    gt        lt Button          android text  Not this time  android id    id cancel          android layout width  wrap content  android layout height  wrap content          android padding  10dip  weight  1    gt     lt  LinearLayout gt

User · Answer

Below are the changes  Marked in BOLD  in your code    lt LinearLayout      android layout width  fill parent       android layout height  wrap content       android orientation  horizontal  gt         lt Button         android text  Register          android id    id register          android layout width  0dp    changes made here         android layout height  wrap content          android padding  10dip          android layout weight  1    gt    changes made here        lt Button         android text  Not this time          android id    id cancel          android layout width  0dp    changes made here         android layout height  wrap content          android padding  10dip          android layout weight  1    gt    changes made here     lt  LinearLayout gt    Since your LinearLayout has orientation as horizontal  therefore you will need to keep your width only as 0dp  for using weights in that direction    If your orientation was vertical  you would have kept your height only 0dp    Since there are 2 views and you have placed android layout weight  1  for both the views  it means it will divide the two views equally in horizontal direction  or by width

[android] Linear Layout and weight in Android

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