fredag 8 februari 2013

Android : Fragments (a reminder)

Everyone is propably used to fragments by now, this is a quick reminder what methods to override for different purposes. Google has two helpful pages on fragments, the reference class page for Fragment, can be found here and their general for Fragments,

This will be a shortpacked for most methods i usually override as a reminder for myself!

Keyboard shortcuts to open the generate code dialog is  ALT + Insert for IntelliJ IDEA

ALT + Shift + S for Eclipse users.

Screenshot from IntelliJ IDEA.

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

 *  MyFragment - Does Exactly Nothing! :)
public class MyFragment extends Fragment {

    private IUpdate myListener;

    public void onAttach(Activity activity) {
        // We have any listeners that need to communicate
        // with our activity, lets attach them here.
        myListener = (IUpdate) activity;

    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // A custom xml view involved
        // Lets inflate it here!
        return inflater.inflate(R.layout.secret_layout, container, false);

    public void onActivityCreated(Bundle savedInstanceState) {
        // Manage & find all the containers/widgets
        // in our layout.
        View myView = getView();

    public void onResume() {
        // We have something that might have changed while coming back
        // from another view? Settings ? Lets check & then update.

    public void onSaveInstanceState(Bundle outState) {
        // If our activity gets destroyed.
        // I.e we changed from portrait to landscape.
        // Anything we need to remember ?
        // Remember, this do not get called just by hiding your view!
        // It's the activity it depends on.

This should be methods i tend to override depending on what i'm doing when i'm creating a new Fragment.
A small skeleton fragment to keep me on track, hopefully it's helpful!

Now, family time!

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