How to simulate a button click using code?

Question

How can I trigger a button click event using code in Android? I want to trigger the button click programmatically when some other event occurs.

Same Problem I am Facing

public void onDateSelectedButtonClick(View v){
    /*Something  Alarm Management 
    http://www.java2s.com/Code/Android/Core-Class/Alarmdemo.htm
    copied code from this site*/
}

Button code:

<Button
    android:onClick="onDateSelectedButtonClick"
    android:text="Set notification for this date" />

But I want to call that function OnLoadLayout without OnClickEvent

can you please specify the problem? why do you want that? Do you want to trigger some code to be executed? — Vladimir Ivanov, Dec 29 '10 at 11:03
yes, i want to trigger the code to be executed for the button click. — sam, Dec 29 '10 at 11:06

score 480 · Accepted Answer · edited Dec 12 '19 at 04:16

480

there is a better way.

View.performClick();

http://developer.android.com/reference/android/view/View.html#performClick()

this should answer all your problems. every View inherits this function, including Button, Spinner, etc.

Just to clarify, View does not have a static performClick() method. You must call performClick() on an instance of View. For example, you can't just call

View.performClick();

Instead, do something like:

View myView = findViewById(R.id.myview);
myView.performClick();

edited Dec 12 '19 at 04:16

audiojared

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answered Feb 02 '11 at 17:14

moonlightcheese

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2

But what is the View for Android's back button? – Peter Ajtai Nov 22 '11 at 21:12
how can get back button view? – Pratik Popat Dec 27 '11 at 09:25
5

there is no "View" for the back button on your phone. you need to use key listeners to get those button presses. that's a different issue altogether. – moonlightcheese Dec 29 '11 at 17:39
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@moon - If you want to have people notified of your comments, start them with "@" and the first few letters of the user who you want notified.... (authors of the commented on post automatically get notified, but commenters do not) – Peter Ajtai Jan 06 '12 at 01:29
To simulate _BACK_ button press you can just call `onBackPressed()` from your activity code (added in API8) – Alex Semeniuk Apr 04 '13 at 12:58
16

The code shown in this answer is a little confusing. Just to clarify, View does not have a static performClick() method. You must call performClick() on an instance of View. – Lukasz Wiklendt Dec 25 '13 at 01:27
3

it's only confusing if you don't know what you're doing. – moonlightcheese Dec 27 '13 at 15:04
1

is correct, because button not is a button, works, because button is a view, all layers (textview/scroll/button... ) extends view, view.performClick(), only invoke click into view, – Nov 24 '15 at 16:15
Is there any way for performing click on Google Maps Marker ? – Syed Hamza Hassan Sep 12 '18 at 09:45
this is not working in case of dialog list and menu item. – kishan verma Aug 08 '23 at 07:28

score 54 · Answer 2 · edited Mar 29 '12 at 06:45

54

Just to clarify what moonlightcheese stated: To trigger a button click event through code in Android provide the following:

buttonName.performClick();

edited Mar 29 '12 at 06:45

JJJ

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answered Mar 28 '12 at 19:09

Scott Tovey

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score 14 · Answer 3 · answered Sep 24 '15 at 07:01

14

you can do it this way

private Button btn;
btn = (Button)findViewById(R.id.button2);
btn.performClick();

answered Sep 24 '15 at 07:01

Tushar Saha

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score 9 · Answer 4 · answered Jul 16 '15 at 13:47

9

Just write this simple line of code :-

button.performClick();

where button is the reference variable of Button class and defined as follows:-

private Button buttonToday ;
buttonToday = (Button) findViewById(R.id.buttonToday);

That's it.

answered Jul 16 '15 at 13:47

Deepak Sharma

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score 7 · Answer 5 · answered Nov 12 '13 at 18:58

Android's callOnClick() (added in API 15) can sometimes be a better choice in my experience than performClick(). If a user has selection sounds enabled, then performClick() could cause the user to hear two continuous selection sounds that are somewhat layered on top of each other which can be jarring. (One selection sound for the user's first button click, and then another for the other button's OnClickListener that you're calling via code.)

score 7 · Answer 6 · answered Jul 20 '16 at 10:30

7

Starting with API15, you can use also callOnClick() that directly call attached view OnClickListener. Unlike performClick(), this only calls the listener, and does not do any associated clicking actions like reporting an accessibility event.

answered Jul 20 '16 at 10:30

Colateral

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score 4 · Answer 7 · answered Jul 09 '15 at 09:21

If you do not use the sender argument, why not refactor the button handler implementation to separate function, and call it from wherever you want (from the button handler and from the other place).

Anyway, it is a better and cleaner design - a code that needs to be called on button handler AND from some other places deserves to be refactored to own function. Plus it will help you separate UI handling from application logic code. You will also have a nice name to the function, not just onDateSelectedButtonClick().

How to simulate a button click using code?

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