DownloadFragment.java

package com.markzhai.lyrichere.ui;

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

import com.markzhai.lyrichere.R;


public class DownloadFragment extends Fragment {
    private static final String TAG = DownloadFragment.class.getSimpleName();

    private OnFragmentInteractionListener mListener;

    public DownloadFragment() {
        // Required empty public constructor
    }

    public static DownloadFragment newInstance() {
        DownloadFragment fragment = new DownloadFragment();
        Bundle args = new Bundle();
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_download, container, false);
        Button submitButton = (Button) view.findViewById(R.id.submit_button);
        Button clearButton = (Button) view.findViewById(R.id.clear_button);
        submitButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onButtonPressed(getActivity().getString(R.string.not_implemented));
            }
        });
        clearButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onButtonPressed(getActivity().getString(R.string.not_implemented));
            }
        });
        return view;
    }

    // TODO: Rename method, update argument and hook method into UI event
    public void onButtonPressed(String hint) {
        if (mListener != null) {
            mListener.onFragmentInteraction(hint);
        }
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        try {
            mListener = (OnFragmentInteractionListener) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString()
                    + " must implement OnFragmentInteractionListener");
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        mListener = null;
    }

    public interface OnFragmentInteractionListener {
        void onFragmentInteraction(String hint);
    }
}