Java tutorial
package com.stanzione.licensesmanagement.ui; import android.app.Activity; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentTransaction; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.util.Log; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import android.widget.ProgressBar; import android.widget.Toast; import com.stanzione.licensesmanagement.Operations; import com.stanzione.licensesmanagement.R; import com.stanzione.licensesmanagement.helper.Utils; import com.stanzione.licensesmanagement.model.Company; import com.stanzione.licensesmanagement.model.UserAccess; import java.util.ArrayList; /** * A simple {@link Fragment} subclass. * Activities that contain this fragment must implement the * {@link CompanyListFragment.OnFragmentInteractionListener} interface * to handle interaction events. * Use the {@link CompanyListFragment#newInstance} factory method to * create an instance of this fragment. */ public class CompanyListFragment extends Fragment implements Operations.OperationsCallback, CompanyRecyclerAdapter.OnCompanyListener { private static final int CODE_LIST_COMPANY = 1; private static final int CODE_REMOVE_COMPANY = 2; private static final String ARG_LOGGED_USER = "loggedUser"; private UserAccess loggedUser; private static final String TAG = CompanyListFragment.class.getSimpleName(); private Button newCompanyButton; private RecyclerView companyRecyclerView; private ArrayList<Company> companyArrayList; private ProgressBar progressBar; private CompanyRecyclerAdapter companyRecyclerAdapter; private int positionToDelete; private OnFragmentInteractionListener mListener; public CompanyListFragment() { // Required empty public constructor } /** * Use this factory method to create a new instance of * this fragment using the provided parameters. * * @param loggedUser Parameter 1. * @return A new instance of fragment CompanyListFragment. */ public static CompanyListFragment newInstance(UserAccess loggedUser) { CompanyListFragment fragment = new CompanyListFragment(); Bundle args = new Bundle(); args.putSerializable(ARG_LOGGED_USER, loggedUser); fragment.setArguments(args); return fragment; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (getArguments() != null) { loggedUser = (UserAccess) getArguments().getSerializable(ARG_LOGGED_USER); } } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment View view = inflater.inflate(R.layout.fragment_company_list, container, false); setHasOptionsMenu(true); newCompanyButton = (Button) view.findViewById(R.id.newCompanyButton); companyRecyclerView = (RecyclerView) view.findViewById(R.id.companyRecyclerView); progressBar = (ProgressBar) view.findViewById(R.id.progressBar); progressBar.setVisibility(View.INVISIBLE); newCompanyButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { showCreateCompanyFragment(); } }); return view; } @Override public void onStart() { super.onStart(); if (!Utils.isOnline(this.getActivity())) { Toast.makeText(this.getActivity(), "There is no internet connection!", Toast.LENGTH_SHORT).show(); return; } progressBar.setVisibility(View.VISIBLE); Operations ops = new Operations(this, CODE_LIST_COMPANY); ops.getCompanyList(); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { inflater.inflate(R.menu.fragment_company_list, menu); super.onCreateOptionsMenu(menu, inflater); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.menu_company_manage: companyRecyclerAdapter.setShowEdit(!companyRecyclerAdapter.getShowEdit()); companyRecyclerAdapter.notifyDataSetChanged(); } return super.onOptionsItemSelected(item); } private void showCreateCompanyFragment() { CreateCompanyFragment createCompanyFragment = CreateCompanyFragment.newInstance(loggedUser); FragmentTransaction transaction = getFragmentManager().beginTransaction(); // Replace whatever is in the fragment_container view with this fragment, // and add the transaction to the back stack transaction.replace(R.id.mainBody, createCompanyFragment); transaction.addToBackStack(null); // Commit the transaction transaction.commit(); } @Override public void onAttach(Activity activity) { super.onAttach(activity); if (activity instanceof OnFragmentInteractionListener) { mListener = (OnFragmentInteractionListener) activity; } else { throw new RuntimeException(activity.toString() + " must implement OnFragmentInteractionListener"); } } @Override public void onDetach() { super.onDetach(); mListener = null; } @Override public void onOperationSuccess(Object returnObject, int operationCode) { Log.d(TAG, "Operation success!"); if (operationCode == CODE_LIST_COMPANY) { companyArrayList = (ArrayList<Company>) returnObject; companyRecyclerAdapter = new CompanyRecyclerAdapter(getContext(), companyArrayList, loggedUser, this); companyRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity())); companyRecyclerView.setAdapter(companyRecyclerAdapter); } else if (operationCode == CODE_REMOVE_COMPANY) { Toast.makeText(getContext(), "Company removed successfully!", Toast.LENGTH_LONG).show(); companyArrayList.remove(positionToDelete); companyRecyclerAdapter.notifyDataSetChanged(); } progressBar.setVisibility(View.INVISIBLE); } @Override public void onOperationFail(Object returnObject, int operationCode) { Log.d(TAG, "Operation fail!"); progressBar.setVisibility(View.INVISIBLE); } @Override public void onOperationError(Object returnObject, int operationCode) { progressBar.setVisibility(View.INVISIBLE); } @Override public void onCompanySelected(int position) { positionToDelete = position; Company selectedCompany = companyArrayList.get(positionToDelete); Log.d(TAG, "selectedCompany ID: " + selectedCompany.getId()); CompanyDetailsFragment companyDetailsFragment = CompanyDetailsFragment.newInstance(loggedUser, selectedCompany); FragmentTransaction transaction = getFragmentManager().beginTransaction(); // Replace whatever is in the fragment_container view with this fragment, // and add the transaction to the back stack transaction.replace(R.id.mainBody, companyDetailsFragment); transaction.addToBackStack(null); // Commit the transaction transaction.commit(); } @Override public void onCompanyToEdit(int position) { Company selectedCompany = companyArrayList.get(position); Log.d(TAG, "selectedCompany ID: " + selectedCompany.getId()); CompanyEditFragment companyEditFragment = CompanyEditFragment.newInstance(loggedUser, selectedCompany); FragmentTransaction transaction = getFragmentManager().beginTransaction(); // Replace whatever is in the fragment_container view with this fragment, // and add the transaction to the back stack transaction.replace(R.id.mainBody, companyEditFragment); transaction.addToBackStack(null); // Commit the transaction transaction.commit(); } @Override public void onCompanyToDelete(int position) { Company selectedCompany = companyArrayList.get(position); Log.d(TAG, "selectedCompany ID: " + selectedCompany.getId()); if (!Utils.isOnline(this.getActivity())) { Toast.makeText(this.getActivity(), "There is no internet connection!", Toast.LENGTH_SHORT).show(); return; } progressBar.setVisibility(View.VISIBLE); Operations ops = new Operations(this, CODE_REMOVE_COMPANY); ops.removeCompany(selectedCompany.getId(), loggedUser.getId()); } /** * This interface must be implemented by activities that contain this * fragment to allow an interaction in this fragment to be communicated * to the activity and potentially other fragments contained in that * activity. * <p/> * See the Android Training lesson <a href= * "http://developer.android.com/training/basics/fragments/communicating.html" * >Communicating with Other Fragments</a> for more information. */ public interface OnFragmentInteractionListener { // TODO: Update argument type and name void onFragmentInteraction(Uri uri); } }