How to navigate in fragments?

Question

So I am using Tabs and seeking for this kind of navigation:

tab1 -- > inside 1 -- > inside2

tab2 -- > inside 3 -- > inside 4

tab3 -- > inside 5

Answer 1

I like to let my host Activity handle all transitions, so what I do in my fragments is create an interface to handle navigation. For example, you could add this interface to your Tab1Fragment:

public interface Callback {
    public void onButtonBClicked();
}

Then in your TabsFragmentActivity, implement Tab1Fragment.Callback, which will require you to implement onButtonBClicked(). Here's an example of how you could implement this method:

@Override
public void onButtonBClicked() {

    Fragment anotherFragment = Fragment.instantiate(this, AnotherFragment.class.getName());
    FragmentTransaction ft = getFragmentManager().beginTransaction();
    ft.add(R.id.realtabcontent, anotherFragment);
    ft.addToBackStack(null);
    ft.commit();
}

Almost done. Next, you need to do is get a reference to this callback in your fragment. This is typically achieved in the onAttached() method. For example:

@Override
public void onAttach(Activity activity) {

    super.onAttach(activity);
    try {
        mCallback = (Callback) activity;
    }
    catch (ClassCastException e) {
        throw new ClassCastException(activity.toString() + " must implement " + Callback.class.getName());
    }
}

And, finally, in your OnClickListener, call mCallback.onButtonBClicked().