AlertDialog Builder with custom layout and EditText cannot access view

Question

I am trying to create an alert dialog with an EditText object  I need to set the initial text of the EditText programmatically  Here s what I have   AlertDialog Builder dialogBuilder   new AlertDialog Builder this         Irrelevant code for customizing the buttons and title AlertDialog alertDialog   dialogBuilder create    LayoutInflater inflater   this getLayoutInflater    alertDialog setContentView inflater inflate R layout alert label editor  null    EditText editText    EditText  findViewById R id label field   editText setText  test label    alertDialog show      What do I need to change so that I can have a valid EditText object    edit   So  it was pointed out by user370305 and others that I should be using alertDialog findViewById R id label field    Unfortunately there is another issue here  Apparently  setting the content view on the AlertDialog causes the program to crash at runtime  You have to set it on the builder    AlertDialog Builder dialogBuilder   new AlertDialog Builder this         Irrelevant code for customizing the buttons and title dialogBuilder setView inflater inflate R layout alert label editor  null    AlertDialog alertDialog   dialogBuilder create    LayoutInflater inflater   this getLayoutInflater    EditText editText    EditText  alertDialog findViewById R id label field   editText setText  test label    alertDialog show      Unfortunately  when you do this  alertDialog findViewById R id label field   now returns null     edit

User · Answer

Shows  confirmation dialog about signing in      private void startAuthDialog         AlertDialog Builder dialogBuilder   new AlertDialog Builder this       AlertDialog alertDialog   dialogBuilder create        alertDialog show         alertDialog getWindow   setLayout 800  1400       LayoutInflater inflater   this getLayoutInflater        View dialogView   inflater inflate R layout auth dialog  null       alertDialog getWindow   setContentView dialogView       EditText editText    EditText  dialogView findViewById R id label field       editText setText  test label

User · Answer

Use this one        AlertDialog Builder builder   new AlertDialog Builder activity          Get the layout inflater     LayoutInflater inflater    activity  getLayoutInflater           Inflate and set the layout for the dialog        Pass null as the parent view because its going in the        dialog layout     builder setTitle title       builder setCancelable false       builder setIcon R drawable galleryalart       builder setView inflater inflate R layout dialogue  null          Add action buttons              setPositiveButton  OK   new DialogInterface OnClickListener                      Override                 public void onClick DialogInterface dialog  int id                                                                 builder create        builder show

User · Answer

editText is a part of alertDialog layout so Just access editText with reference of alertDialog  EditText editText    EditText  alertDialog findViewById R id label field     Update    Because in code line dialogBuilder setView inflater inflate R layout alert label editor  null     inflater is Null   update your code like below  and try to understand the each code line  AlertDialog Builder dialogBuilder   new AlertDialog Builder this         Irrelevant code for customizing the buttons and title LayoutInflater inflater   this getLayoutInflater    View dialogView   inflater inflate R layout alert label editor  null   dialogBuilder setView dialogView    EditText editText    EditText  dialogView findViewById R id label field   editText setText  test label    AlertDialog alertDialog   dialogBuilder create    alertDialog show      Update 2   As you are using View object created by Inflater to update UI components else you can directly use setView int layourResId  method of AlertDialog Builder class  which is available from API 21 and onwards

User · Answer

View v inflater inflate R layout alert label editor  null   alertDialog setContentView v   EditText editText    EditText v findViewById R id label field   editText setText  test label    alertDialog show

User · Answer

Change this   EditText editText    EditText  findViewById R id label field     to this   EditText editText    EditText   v findViewById R id label field

User · Answer

In case any one wants it in Kotlin     val dialogBuilder   AlertDialog Builder this        Irrelevant code for customizing the buttons and title val dialogView   layoutInflater inflate R layout alert label editor  null  dialogBuilder setView dialogView   val editText    dialogView findViewById R id label field  editText setText  test label   val alertDialog   dialogBuilder create   alertDialog show     Reposted  user370305 s answer

User · Answer

You can write   AlertDialog Builder dialogBuilder   new AlertDialog Builder this           Irrelevant code for customizing the buttons and title  LayoutInflater inflater   this getLayoutInflater      View dialogView  inflater inflate R layout alert label editor  null                       dialogBuilder setView dialogView    Button button    Button dialogView findViewById R id btnName       button setOnClickListener new View OnClickListener             Override        public void onClick View view                Commond here                         EditText editText    EditText  dialogView findViewById R id label field     editText setText  test label      dialogBuilder create   show

[android] AlertDialog.Builder with custom layout and EditText; cannot access view

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