How to listen to button click from other activity?

Asked Mar 16 '18 at 22:35

Active Mar 16 '18 at 22:35

Viewed 88 times

I have 2 activity.

1.activity layout-> one.xml

2.activity layout-> two.xml

There is a button in one.xml

I want to add set on click function in 2.activity

But it gives error

E/AndroidRuntime: FATAL EXCEPTION: main
                  Process: com.ehlyt.droid, PID: 21876
                  java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Button.setOnClickListener(....

so how can I do this?

thanks in advance

asked Mar 16 '18 at 22:35

CompEng

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At first address the `NullPointerException` that you are getting. And you are trying to set click listener from another activity which should not be done. Explain what are you actually trying to achieve and post what you have done so far – Nongthonbam Tonthoi Mar 16 '18 at 22:41
I need to add that to 2.activity How can I do that, I try to inflate but not achive – CompEng Mar 16 '18 at 22:42
What a mess! What you're trying to achieve? – Onik Mar 16 '18 at 22:42
just call on click action from button another activty – CompEng Mar 16 '18 at 22:43
can you explain a use case? – Stefan Golubović Mar 16 '18 at 22:45
What you are trying to can be achieved by using a [BroadcastReceiver](https://developer.android.com/reference/android/content/BroadcastReceiver.html). – Nongthonbam Tonthoi Mar 16 '18 at 22:45
don't you know it is NOT possible in the way you've been trying to do that? Again, what kind of info you'd like to pass between Activities? – Onik Mar 16 '18 at 22:45
I do not call another activity. 1.activity is fragment and 2. is child activity – CompEng Mar 16 '18 at 22:47
the button must be in 1.activty layout. And I need to action on second activity – CompEng Mar 16 '18 at 22:48

How to listen to button click from other activity?

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