CODEWITHSUNDEEP
javaandroidandroid-fragmentsandroid-studio-3.0
shariful islam
shariful islam

Reputation: 399

How to invoke fragment method from activity when I use FragmentPagerAdapter to add fragment into activity?

I create three fragment for swipe view on MainActivity. That's why I use FragmentPagerAdapter to add those fragments on MainActivity. It's all working well. Now I create the bellow method on fragment one.

public void myToast(String text){
Toast.makeText(getActivity(), text, Toast.LENGTH_LONG).show();
}

How I can call/invoke this method from MainActivity?

Note : I can't use findFragmentById() or findFragmentByTag() method because There are no id and tag for those fragments.

Upvotes: 1

Views: 47

Answers (1)

Aman Verma
Aman Verma

Reputation: 3325

you can use these methods - 

private static String makeFragmentName(int viewPagerId, int index) {
        return "android:switcher:" + viewPagerId + ":" + index;
    }

And to access - 

YourFragment yourfragment = (YourFragment) getSupportFragmentManager().findFragmentByTag(makeFragmentName(yourpager.getId(),the fragment number must be int /* 0, 1, 2 *\));

then you can use the method of your fragment in activity-

yourfragment.maketoast()

Upvotes: 1

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