DialogFragmentEx.java

package menion.android.whereyougo.gui.dialogs;

import android.app.Dialog;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;

public abstract class DialogFragmentEx extends DialogFragment {

	public DialogFragmentEx() {
		super();
	}
	
    public boolean shouldRetainInstance() {
        return true;
    }
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        // tell the framework to try to keep this fragment around
        // during a configuration change (true), or recreate (false)
        setRetainInstance(shouldRetainInstance());
    }
    
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
    	Dialog dialog = createDialog(savedInstanceState);
    	dialog.setCancelable(isCancelable());
    	return dialog;
    }
    
    public abstract Dialog createDialog(Bundle savedInstanceState);
    
    /**
     * This is called when the Fragment's Activity is ready to go, after
     * its content view has been installed; it is called both after
     * the initial fragment creation and after the fragment is re-attached
     * to a new activity.
     */
    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
    	try {
    		super.onActivityCreated(savedInstanceState);
    	} catch (Exception e) {
    		dismissAllowingStateLoss();
    	}
    }
    
    /**
     * This is called right before the fragment is detached from its
     * current activity instance.
     */
    @Override
    public void onDetach() {
        super.onDetach();
    }
    
    /**
     * This is called when the fragment is going away.  It is NOT called
     * when the fragment is being propagated between activity instances.
     */
    @Override
    public void onDestroy() {
        super.onDestroy();
    }
    
    // hack on this issue http://code.google.com/p/android/issues/detail?id=17423
	// This is to work around what is apparently a bug. If you don't have it
	// here the dialog will be dismissed on rotation, so tell it not to dismiss.
	@Override
	public void onDestroyView() {
		if (getDialog() != null && getRetainInstance()) {
			getDialog().setDismissMessage(null);
		}
		super.onDestroyView();
	}
	
    /**
     * My own implementation of visibility check
     */
    public boolean isDialogVisible() {
        return isAdded() && !isHidden();
    }
}