CODEWITHSUNDEEP
javaandroidandroid-fragmentsandroid-activity
domi
domi

Reputation: 978

Starting an Activity for result in Fragment

I have been struggling with this case for a long time now, any help would be appreciated.

I have a main activity with 3 fragments (in other words I have an activity with three tabs). On the third fragment I have a button starts a new activity through intent. That new activity is a QR scanner so it basically calls the camera and waits until camera finds appropriate and valid QR code. How do I get the result back to my fragment?

My button's onClick method which located in onCreate method in Fragment3 which extends Fragment class:

        Intent intent = new Intent(getActivity(), ZBarScannerActivity.class);
        startActivityForResult(intent, 1);

My MainActivity's onActivityResult method:

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) 
{
    super.onActivityResult(requestCode, resultCode, data);

    if (resultCode != Activity.RESULT_CANCELED)
    {
        if (resultCode == Activity.RESULT_OK) 
        {
            String result = data.getStringExtra(ZBarConstants.SCAN_RESULT);

        }
    }
}

From this on I cannot figure out how to get this result back to Fragment3's onActivityResult method. Thank you in advance.

Upvotes: 2

Views: 276

Answers (1)

Triode
Triode

Reputation: 11357

FragmentManager.BackStackEntry backEntry=getFragmentManager().getBackStackEntryAt(getActivity().getFragmentManager().getBackStackEntryCount()-1);
String str=backEntry.getName();
Fragment fragment=getFragmentManager().findFragmentByTag(str);

This will give you the latest instance of the fragment. Make sure that you added your backstack entry like this.

fragmentTransaction.addToBackStack(someName);

Or while adding the fragment you can provide a tag. Like below

public abstract FragmentTransaction add (int containerViewId, Fragment fragment, String tag)

Upvotes: 1

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