Error inflating class fragment - duplicate id/illegalargumentexception?

Question

I\'m trying make an app that I\'m building take a search term from the main activity, return results, and then have the results be clickable such that a detail could be view

Answer 1

It occurs when fragments are defined in XML (statically): FragmentManager doesn't manage child fragments if parent fragment is destroyed. Then, it breaks ("duplicate id" error) when the XML is inflated for the second time.

I bypass this problem removing the XML fragment manually when parent is destroyed, with this code in the parent fragment:

@Override
public void onDestroyView() {

    FragmentManager fm = getFragmentManager();

    Fragment xmlFragment = fm.findFragmentById(R.id.XML_FRAGMENT_ID);
    if (xmlFragment != null) {
        fm.beginTransaction().remove(xmlFragment).commit();
    }

    super.onDestroyView();
}

Note for copypasters: XML_FRAGMENT_ID is the id of the fragment in the XML ;)

---

Furthermore, I prefer a new class that wraps XML fragments. It simplyfies the code since you just need to extend your fragment class from it. Add this class to your project:

package net.treboada.mytests.fragments;

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.util.AttributeSet;

public class XmlFragment extends Fragment {

    @Override
    public void onInflate(Activity activity, AttributeSet attrs,
            Bundle savedInstanceState) {

        FragmentManager fm = getFragmentManager();
        if (fm != null) {
            fm.beginTransaction().remove(this).commit();
        }

        super.onInflate(activity, attrs, savedInstanceState);
    }
}

Then, extend your XML fragment classes:

package net.treboada.mytests.fragments;

public class TestXmlFragment01 extends XmlFragment {

    // ...

}

and voilà! :)