Fragment-Fragment communication in Android

Question

I am at beginner level in Android programming, so I need your sincere help for this. Anyone help me please.

I am trying to build a SLIDING UI using fragments

Answer 1

It sounds as if your setup might be something like - MainActivity w/ FragmentA [added] and FragmentB [added]. For this case, I would delegate messages/actions between the two fragments through the MainActivity. Allowing MainActivity to handle the messages/actions also facilitates 'special' orchestrations which might be needed in a more complex situation between the Fragments. For example:

public interface FragmentCommunicator
{
    public void sendMessage ( String broadcastMessage );
    public void takeAction ( String name, int action, Fragment frag );
}

public class MainActivity extends Activity implements FragmentCommunicator
{
    Fragment fragA;
    Fragment fragB;
    ...
    @Override
    public void sendMessage ( String msg )
    {
        if ( msg.Contains("Send To fragA") )
            fragA.receiveMsg(msg);
        ...
    }
    @Override
    public void takeAction ( String name, int action, Fragment frag )
    {
    if ( action == CLOSE )
            removeFragment( name, frag );
        ...
    }
}

public class FragmentA extends Fragment
{
    ...
@Override
public void onClick(View v)
{   
     FragmentCommunicator inter = (FragmentCommunicator) getActivity();
     inter.sendMessage("the txt/information/etc you want to send to fragB");    
}
}

public class FragmentB extends Fragment
{
    ...
    public void receiveMsg ( String msg )
    {
        textView.setText(msg);
    }
}

I forgot to post the send portion of FragmentA. Hope this helps.