The specified child already has a parent You must call removeView on the child s parent first Android

Question

I have to switch between two layouts frequently  The error is happening in the layout posted below   When my layout is called the first time  there doesn t occur any error and everything s fine  When I then call a different layout  a blank one  and afterwards call my layout a second time  it throws the following error    gt  FATAL EXCEPTION  main  gt      java lang IllegalStateException  The specified child already has a parent  You must call removeView   on the child s parent first    My layout-code looks like this       tv   new TextView getApplicationContext        are initialized somewhere else     et   new EditText getApplicationContext        in the code   private void ConsoleWindow            runOnUiThread new Runnable           Override      public void run                MY LAYOUT          setContentView R layout activity console              LINEAR LAYOUT         LinearLayout layout new LinearLayout getApplicationContext             layout setOrientation LinearLayout VERTICAL           setContentView layout               TEXTVIEW         layout addView tv        lt             ERROR IN THIS LINE DURING 2ND RUN            EDITTEXT         et setHint  Enter Command            layout addView et                       I know this question has been asked before  but it didn t help in my case

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In my case  I was doing this  wrong       TextView content   new TextView context   for  Quote quote   favQuotes      content setText quote content        instead of  good       for  Quote quote   favQuotes      TextView content   new TextView context     content setText quote content

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simply pass the argument  attachtoroot   false  View view   inflater inflate R layout child layout to merge  parent layout  false

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The code below solved it for me    Override public void onDestroyView         if  getView      null            ViewGroup parent    ViewGroup  getView   getParent            parent removeAllViews              super onDestroyView        Note  The error was from my fragment class and by overriding the onDestroy method like this  I could solve it

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The error message says what You should do      TEXTVIEW if tv getParent      null          ViewGroup tv getParent    removeView tv       lt - fix   layout addView tv        lt             ERROR IN THIS LINE DURING 2ND RUN    EDITTEXT

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You can use this methode to check if a view has children or not    public static boolean hasChildren ViewGroup viewGroup        return viewGroup getChildCount    gt  0

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My problem is related to many of the other answers  but a little bit different reason for needing to make the change    I was trying to convert an Activity to a Fragment  So I moved the inflate code from onCreate to onCreateView  but I forgot to convert from setContentView to the inflate method  and the same IllegalStateException brought me to this page   I changed this   binding   DataBindingUtil setContentView requireActivity    R layout my fragment    to this   binding   DataBindingUtil inflate inflater  R layout my fragment  container  false    That solved the problem

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You must first remove the child view from its parent   If your project is in Kotlin  your solution will look slightly different than Java  Kotlin simplifies casting with as   returning null if left side is null or cast fails    childView parent as  ViewGroup   removeView childView  newParent addView childView    Kotlin Extension Solution  If you need to do this more than once  add this extension to make your code more readable   childView removeSelf    fun View  removeSelf         this    return     val parentView   parent as  ViewGroup    return     parentView removeView this      It will safely do nothing if this View is null  parent view is null  or parent view is not a ViewGroup

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My case was different the child view already had a parent view i am adding the child view inside parent view to different parent  example code below   lt  xml version  1 0  encoding  utf-8   gt   lt LinearLayout xmlns android  http   schemas android com apk res android  android layout width  wrap content  android layout height  wrap content  android layout margin   dimen lineGap   gt   lt TextView     android layout width  wrap content      android layout height  wrap content      android textColor   color black1      android layout gravity  center      android gravity  center        gt    lt  LinearLayout gt    And i was inflating this view and adding to another LinearLayout  then i removed the LinaarLayout from the above layout and its started working   below code fixed the issue     lt  xml version  1 0  encoding  utf-8   gt   lt TextView xmlns android  http   schemas android com apk res android     android layout width  wrap content     android layout height  wrap content     android gravity  center     android textColor   color black1    gt

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check if you already added the view  if  textView getParent      null      layout addView textView

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I got this message while trying to commit a fragment using attach to root to true instead of false  like so   return inflater inflate R layout fragment profile  container  true    After doing   return inflater inflate R layout fragment profile  container  false    It worked

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My error was define the view like this   view   inflater inflate R layout qr fragment  container     It was missing   view   inflater inflate R layout qr fragment  container  false

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If other solution is not working like   View view   inflater inflate R layout child layout to merge  parent layout  false     check for what are you returning from onCreateView of fragment is it single view or viewgroup  in my case I had viewpager on root of xml of fragment and I was returning viewpager  when i added viewgroup in layout i didnt updated that i have to return viewgroup now  not viewpager view

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In my case the problem was caused by the fact that I was inflating parent View with  lt merge gt  layout  In this case  addView   caused the crash   View to add   inflater inflate R layout child layout to merge  parent layout  true      parent layout addView to add      THIS CAUSED THE CRASH   Removing addView   helped to solve the problem

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It happened with me when I was using Databinding for Activity and Fragments  For fragment - in onCreateView we can inflate the layout in traditional way using inflater  and in onViewCreated method  binding object can be updated as  binding   DataBindingUtil getBinding lt FragmentReceiverBinding gt  view  as FragmentReceiverBinding  It solved my issue

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if tv   null         ViewGroup tv getParent    removeView tv       lt - fix

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If in your XML you have layout with id  quot root quot  It s problem  just change id name

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I was facing the same error  and look what I was doing  My bad  I was trying to add the same view NativeAdView to the multiple FrameLayouts  resolved by creating a separate view NativeAdView for each FrameLayout  Thanks

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In my case it happens when i want add view by parent to other view  View root   inflater inflate R layout single  null   LinearLayout lyt   root findViewById R id lytRoot   lytAll addView lyt       - gt   crash   you must add parent view like this  View root   inflater inflate R layout single  null   LinearLayout lyt   root findViewById R id lytRoot   lytAll addView root

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I came here on searching the error with my recyclerview but the solution didn t work  obviously   I have written the cause and the solution for it in case of recyclerview  Hope it helps someone   The error is caused if in the onCreateViewHolder   the following method is followed   layoutInflater   LayoutInflater from context   return new VH layoutInflater inflate R layout single row  parent      Instead it should be   return new VH layoutInflater inflate R layout single row  null

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frameLayout addView bannerAdView     lt ----- if you get error on this line the do like below    if  bannerAdView getParent      null       ViewGroup  bannerAdView getParent    removeView bannerAdView       frameLayout addView bannerAdView        lt ------ now added view

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I found another fix   if  mView getParent      null                        myDialog   new Dialog MainActivity this                       myDialog setContentView mView                       createAlgorithmDialog                      else                       createAlgorithmDialog                        Here i just have an if statement check if the view had a parent and if it didn t Create the new dialog  set the contentView and show the dialog in my  createAlgorithmDialog    method   This also sets the positive and negative buttons  ok and cancel buttons  up with onClickListeners

[java] The specified child already has a parent. You must call removeView() on the child's parent first (Android)

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