Android Code Example: FragmentManager (from https://www.codota.com/android/scenarios/52fcbd33da0acf2e34b35120/android.support.v4.app.FragmentManager?tag=dragonfly)

FragmentManager.java

public void show() { 
    FragmentManager fragmentManager = mActivity.getSupportFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
 
    Fragment prev = fragmentManager.findFragmentByTag(FRAGMENT_TAG);
    if (prev != null) {
        fragmentTransaction.remove(prev);
    } 
    fragmentTransaction.addToBackStack(null);
 
    ErrorDialogFragment.newInstance(mTitle, mMessage, mOnClickListener, mOnCancelListener)
            .show(fragmentManager, FRAGMENT_TAG);
}