How to disable an Android button

Question

I have created a layout that contains two buttons  Next and Previous  In between the buttons I m generating some dynamic views  So when I first launch the application I want to disable the  Previous  button since there wont be any previous views  I also want to disable the  Next  button when there are not more views to display  Is there anyway to disable the buttons

User · Answer

WRONG WAY IN LISTENER TO USE VARIABLE INSTEAD OF PARAMETER     btnSend setOnClickListener new OnClickListener           Override     public void onClick View v            btnSend setClickable false                RIGHT WAY    btnSend setOnClickListener new OnClickListener           Override     public void onClick View v                 check given view  by assertion or cast as u wish            if v instance of Button                     cast                Button button    Button  v                   we can perform some check up                if button getId      EXPECTED ID                         disable view                    button setEnabled false                              button setClickable false                             else                     you can for example find desired view by root view                  Button bt    Button  v getRootView   findViewById R id btId                   check for button                 if bt  null                          disable button view                                        else                        according to  jeroen-bollen remark                      we made assumption that we expected a view                      of type button here in other any case                                           throw new IllegalArgumentException  Wrong argument                                View passed to method is not a Button type                                                   EDIT   In reply to  jeroen-bollen    View OnClickListener        is Interface definition for a callback to be invoked when a view is clicked       with method definition    void onClick View v      when the view is clicked the View class object makes callback to method onClick   sending as parameter itself  so null view parameter should not occur if it does it s an Assertion Error it could happen for example when View object class was destroyed in meanwhile  for example collected by GC  or method was tampered due to hack   little about instanceof  amp  null      JLS   15 20 2  Type Comparison Operator instanceof      At run time  the result of the instanceof operator is true       if the value of the RelationalExpression is not null       and the reference could be cast to the ReferenceType           without raising a ClassCastException       Otherwise the result is false      three words from the Author  IF U ASK WHY     MOSTLY TO AVOID NullPointerException   Little more code will save your time on later bug tracking in your code  amp  reduces the occurrence of abnomalies    consider following example   View OnClickListener listener   new OnClickListener           Override     public void onClick View v            btnSend setClickable false               btnSend setOnClickListener listener  btnCancel setOnClickListener listener

User · Answer

In Java  once you have the reference of the button   Button button    Button  findviewById R id button     To enable disable the button  you can use either   button setEnabled false   button setEnabled true     Or   button setClickable false   button setClickable true     Since you want to disable the button from the beginning  you can use button setEnabled false   in the onCreate method  Otherwise  from XML  you can directly use   android clickable    false    So    lt Button         android id    id button          android layout height  wrap content          android layout width  wrap content          android text   string button text          android clickable    false    gt

User · Answer

Yes it can be disabled  in XML just using    lt Button android enabled  false    gt

User · Answer

You just write a single line of code in your activity  Button btn    Button  findViewById R id button1   btn setEnabled false     When you want to enable the same button just write  Button btn    Button  findViewById R id button1   btn setEnabled true

User · Answer

In Kotlin  if you refer the Button View with id then  enable disable button as like  layout xml      lt Button    android id    id btn start     android layout width  100dp     android layout height  50dp     android text   string start     android layout alignParentBottom  true   gt    activity kt    btn start isEnabled   true     to enable button   btn start isEnabled   false    to disable button

User · Answer

With Kotlin you can do     to disable clicks myButton isClickable   false      to disable button myButton isEnabled   false     to enable clicks myButton isClickable   true      to enable button myButton isEnabled   true

User · Answer

If you need to disable button add this line of code  Button button   findViewById R id button  button setEnabled false    And enable button   just add this line  button setEnabled true    Happy coding  D

User · Answer

first in xml make the button as android clickable  false    lt Button         android id    id btn send          android clickable  false   gt    then in your code  inside oncreate   method set the button property as  btn setClickable true     then inside the button click change the code into   btn setClickable false     Override protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       btnSend    Button  findViewById R id btn send       btnSend setClickable true       btnSend setOnClickListener new OnClickListener               Override         public void onClick View v                btnSend setClickable false

User · Answer

In my case    myButton setEnabled false   myButton setEnabled true     is working fine and it is enabling and disabling the button as it should  But once the button state becomes disabled  it never goes back to the enabled state again  although it s clickable  I tried invalidating and refreshing the drawable state  but no luck   myButton invalidate    myButton refreshDrawableState      If you or anyone having a similar issue  what works for me is setting the background drawable again  Works on any API Level   myButton setEnabled true   myButton setBackgroundDrawable activity getResources   getDrawable R drawable myButtonDrawable

User · Answer

Did you try this   myButton setEnabled false      Update  Thanks to Gwen  Almost forgot that android clickable can be set in your XML layout to determine whether a button can be clickable or not

User · Answer

You can t enable it or disable it in your XML  since your layout is set at runtime   but you can set if it s clickable at the launch of the activity with android clickable

[android] How to disable an Android button?

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