How to center the content inside a linear layout

Question

I m trying to center an ImageView inside a LinearLayout horizontally and vertically  but I just can t do it  The main reason why I m not using a RelativeLayout for that is because I need the layout weight  my Activity consists of four columns that should be equally divided  and also responsive to different screen widths  each column having an ImageView centered and unstretched    Here is my xml so far    lt 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 background   000      android baselineAligned  false      android gravity  center      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   Main   gt        lt LinearLayout         android layout width  0dp          android layout height  wrap content          android layout gravity  center          android layout weight  1   gt            lt ImageView             android id    id imageButton speak              android layout width  wrap content              android layout height  wrap content              android background   drawable image bg              android src   drawable ic speak    gt       lt  LinearLayout gt        lt LinearLayout         android layout width  0dp          android layout height  wrap content          android layout gravity  center          android layout weight  1   gt            lt ImageView             android id    id imageButton readtext              android layout width  wrap content              android layout height  wrap content              android background   drawable image bg              android src   drawable ic readtext    gt       lt  LinearLayout gt        lt LinearLayout         android layout width  0dp          android layout height  wrap content          android layout gravity  center          android layout weight  1   gt            lt ImageView             android id    id imageButton edit              android layout width  wrap content              android layout height  wrap content              android background   drawable image bg              android src   drawable ic edit    gt       lt  LinearLayout gt        lt LinearLayout         android layout width  0dp          android layout height  wrap content          android layout gravity  center          android layout weight  1   gt            lt ImageView             android id    id imageButton config              android layout width  wrap content              android layout height  wrap content              android background   drawable image bg              android src   drawable ic config    gt       lt  LinearLayout gt   lt  LinearLayout gt

User · Answer

android gravity can be used on a Layout to align its children   android layout gravity can be used on any view to align itself in its parent      NOTE  If self or children is not centering as expected  check if width height is match parent and change to something else

User · Answer

android gravity handles the alignment of its children   android layout gravity handles the alignment of itself   So use one of these    lt 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 background   000      android baselineAligned  false      android gravity  center      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   Main   gt        lt LinearLayout         android layout width  0dp          android layout height  wrap content          android layout weight  1          android gravity  center   gt            lt ImageView             android id    id imageButton speak              android layout width  wrap content              android layout height  wrap content              android background   drawable image bg              android src   drawable ic speak    gt       lt  LinearLayout gt        lt LinearLayout         android layout width  0dp          android layout height  wrap content          android layout weight  1          android gravity  center   gt            lt ImageView             android id    id imageButton readtext              android layout width  wrap content              android layout height  wrap content              android background   drawable image bg              android src   drawable ic readtext    gt       lt  LinearLayout gt            lt  LinearLayout gt    or   lt 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 background   000      android baselineAligned  false      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   Main   gt        lt LinearLayout         android layout width  0dp          android layout height  wrap content          android layout gravity  center          android layout weight  1   gt            lt ImageView             android id    id imageButton speak              android layout width  wrap content              android layout height  wrap content              android layout gravity  center              android background   drawable image bg              android src   drawable ic speak    gt       lt  LinearLayout gt        lt LinearLayout         android layout width  0dp          android layout height  wrap content          android layout gravity  center          android layout weight  1   gt            lt ImageView             android id    id imageButton readtext              android layout width  wrap content              android layout height  wrap content              android layout gravity  center              android background   drawable image bg              android src   drawable ic readtext    gt       lt  LinearLayout gt            lt  LinearLayout gt

User · Answer

I tried solutions mentioned here but It didn t help me  I mind the solution is layout width have to use wrap content as value    lt LinearLayout     android layout width  wrap content      android layout height  wrap content      android gravity  center      android layout weight  1   gt

User · Answer

android layout gravity is used for the layout itself  Use android gravity  center  for children of your LinearLayout  So your code should be    lt LinearLayout         android layout width  0dp          android layout height  wrap content          android gravity  center          android layout weight  1   gt

User · Answer

If you are looking for an answer in java code  LinearLayout linearLayout   new LinearLayout context   linearLayout setGravity Gravity CENTER      add children

User · Answer

Here s some sample code  This worked for me    lt LinearLayout     android gravity  center       gt       lt TextView         android layout gravity  center            gt       lt Button         android layout gravity  center            gt   lt  LinearLayout gt    So you re designing the Linear Layout to place all its contents  TextView and Button  in its center  and then the TextView and Button are placed relative to the center of the Linear Layout

[android] How to center the content inside a linear layout?

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