Android: How to programmatically click on a button previously located in an activity in the activity stack, from a fragment?

Question

When I am in a fragmentB, how to simulate a click on a button located in an activity in the stack.

LoginActivityA => fragmentB.

I want to simulate something like this:

LoginActivityA.btnClick() from the fragmentB

I tried to use this tickets with no success: Ticket1, Ticket2, Ticket3
Here is my code:
FragmentB:

//BEGIN TEST
String message="hello ";
Intent intent = new Intent(getActivity(), LoginActivity.class);
intent.putExtra("MESSAGE",message);
getActivity().setResult(2,intent);
getActivity().startActivityForResult(intent,2);
getActivity().finish();//finishing activity
//END TEST

LoginActivityA:

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        super.onActivityResult(requestCode, resultCode, data);
        // check if the request code is same as what is passed  here it is 2
        if(requestCode==2)
        {
            //do the things u wanted
        }
    }

I precise that I try not to get multiple LoginActivity and Fragment launched. I would like to get only one stack with LoginActivity => Fragment

Any ideas?

EDIT:

I tried this from this tichet with no success:

((LoginActivity)getActivity()).login();

I launched the activity function from the presented fragment with an error

"No acceptable module found. Local version is 0 and remote version is 0."

score 0 · Answer 1 · answered Mar 06 '20 at 16:11

0

You can use an interface with an onClick method that is implemented by your activity and then in fragment B call the method onClick whenever you want and pass the activity to it.

Although I presume what you are doing is wrong and you should change your mind around it.

answered Mar 06 '20 at 16:11

Elmira Frhn

320
4
14

hi! I can do that, but how to call a function in the A activity from the stack? – ΩlostA Mar 06 '20 at 16:32
@ΩlostA isn't LoginActivityA, FragmentB's host? – Elmira Frhn Mar 06 '20 at 17:03
yes it is. The first view launched is the loginActivityA, and then the FragmentB – ΩlostA Mar 06 '20 at 17:05
Ok. So you can get activityA in Fragment be : fragmentB.getActivity() – Elmira Frhn Mar 06 '20 at 17:41
I get " No acceptable module found. Local version is 0 and remote version is 0." by doing activityA activity = (activityA) fragmentB.this.getActivity(); – ΩlostA Mar 06 '20 at 18:47

score 0 · Answer 2 · answered Mar 06 '20 at 16:24

This is not a good practice, but if you want you can call your activity UI elements by

((Button) getActivity().findViewById(R.id.button_id)).performClick();

Always remember, Android is a well architect platform, if you are trying to do something which is difficult, probably you should not do it. Rethink about your your design patterns.

Android: How to programmatically click on a button previously located in an activity in the activity stack, from a fragment?

2 Answers2