Question

I’m pretty new to Android development and I am trying to handle multiple button clicks from a fragment class to my activity. I was able to figure out how to handle one click by creating a listener in my fragment class and then having the activity class implement that interface.

myFragment.java

    onResetGridListener mCallback;


    // Container activity must implement this interface
    public interface onResetGridListener
    {
        public void ResetGridClicked();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
        Bundle savedInstanceState) 
    {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.tilemap, container, false);

        Button button = (Button) view.findViewById(R.id.resetGrid_button);

        // A simple OnClickListener for our button. You can see here how a Fragment can encapsulate
        // logic and views to build out re-usable Activity components.
        button.setOnClickListener(new OnClickListener() 
        {
            public void onClick(View v)
            {
                mCallback.ResetGridClicked();
            }

        });

        return view;
    }

This works perfectly, however I have another button in the same fragment now and many more to come so I was wondering how to handle this. Can the activity implement more than one interface (one for each button) or am I going about this the wrong way?

Thank you for your time and information

Answer 1

You can let your Fragment implement interface. Then it’ll look like this:

 //init buttons somewhere
 button.setOnClickListener(this);
 anotherButton.setOnClickListener(this);

 //that's a Fragment method
 public void onClick(View v)
   {
      switch(v.getId()){
          case R.id.button1:
            doStuff();
          break;
          case R.id.button2:
            doStuff();
          break;
      }
   }