Question

I am using view pager and in that I am having three fragments. In my second fragment I am having button clicking on which take you to the first fragment.

I am new with the fragment. So please give me your valuable suggestions and links for this.

Thanking you in advance.

Answer 1

On click of the button in the second fragment, communicate from your fragment to your parent activity that the first fragment is to be shown. You parent activity can then call a function in your view pager which shows the first fragment.

Define an interface in the fragment –

OnCategorySelectedListener mCallback;
 // Container Activity must implement this interface. 
    public interface OnBackSelectedListener {
        // Called when the user clicks back button
        public void onBackSelected();
    }

In onAttach(), link the callback –

try {
            mCallback = (OnBackSelectedListener) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString()
                    + " must implement OnBackSelectedListener");
        }

When the back button is clicked, call the callback interface method –

mCallback.onBackSelected();

In your view pager, implement the onBackSelectedListener interface.