Handle IllegalStateException as a result of DialogFragment.show()

AbstractActivity.java

public abstract class AbstractActivity extends Activity {

    private Map<String, Bundle> dialogs = new HashMap<String, Bundle>();

    private boolean activityPaused = true;
    
    @Override
    public void onResume() {
        super.onResume();
        
        activityPaused = false;

        // Show any dialogs that were attempted to be shown while paused (should only ever be 1 hopefully).
        for (Map.Entry<String, Bundle> entry : dialogs.entrySet()) {
            String fragmentName = entry.getKey();
            Bundle fragmentState = entry.getValue();

            // Instantiate dialog.
            DialogFragment dialogFragment = (DialogFragment) Fragment.instantiate(this, fragmentName, fragmentState);

            // Show dialog.
            dialogFragment.show(getFragmentManager(), dialogFragment.getClass().getSimpleName());
            getFragmentManager().executePendingTransactions();

            // Remove fragment from map.
            dialogs.remove(fragmentName);
        }
    }

    @Override
    public void onPause() {
        activityPaused = true;

        super.onPause();
    }
    
    protected void showDialogFragment(DialogFragment dialogFragment) {
        if (activityPaused) {
            // Delay showing of dialog until we're resumed.
            Bundle savedState = new Bundle();
            dialogFragment.onSaveInstanceState(savedState);

            dialogs.put(dialogFragment.getClass().getName(), savedState);
        } else {
            // Show dialog straight away.
            dialogFragment.show(getFragmentManager(), dialogFragment.getClass().getSimpleName());
            getFragmentManager().executePendingTransactions();
        }
    }
    
}
    

MainActivity.java

public class MainActivity extends AbstractActivity implements MyFragment.IButtons {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        ....
    }

    @Override
    public void onMyButtonClicked() {
        DialogFragment dialogFragment = MyDialogFragment.newInstance("Dummy Title", "Dummy Message");
        showDialogFragment(dialogFragment);
    }

}

MyDialogFragment.java

public class MyDialogFragment extends DialogFragment {

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);

        // Make sure any arguments get saved.
        outState.putAll(getArguments());
    }

}

Thanks for the inspiration.