Java tutorial
/* * Copyright 2016 Matthew Stone and Romario Maxwell. * * This file is part of OurVLE. * * OurVLE is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * OurVLE is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with OurVLE. If not, see <http://www.gnu.org/licenses/>. */ package com.stoneapp.ourvlemoodle2.fragments; import android.app.SearchManager; import android.content.Context; import android.content.Intent; import android.graphics.Color; import android.graphics.Typeface; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.os.AsyncTask; import android.os.Build; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.view.MenuItemCompat; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.support.v7.widget.SearchView; 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.BaseAdapter; import android.widget.Filter; import android.widget.Filterable; import android.widget.ImageView; import android.widget.ListView; import android.widget.ProgressBar; import android.widget.TextView; import android.widget.Toast; import com.amulyakhare.textdrawable.TextDrawable; import com.stoneapp.ourvlemoodle2.adapters.MemberListAdapter; import com.stoneapp.ourvlemoodle2.models.MoodleMember; import com.stoneapp.ourvlemoodle2.tasks.MemberSync; import com.stoneapp.ourvlemoodle2.activities.ProfileActivity; import com.stoneapp.ourvlemoodle2.R; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.List; @SuppressWarnings("FieldCanBeLocal") public class MembersFragment extends Fragment implements SearchView.OnQueryTextListener { private String courseid; private String token; private Context context; private List<MoodleMember> members; private MemberListAdapter madapter; private MenuItem searchitem; private List<MoodleMember> filteredMemList; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Bundle args = getArguments(); if (args != null) { this.courseid = args.getInt("courseid") + ""; // course id from previous activity this.token = args.getString("token"); // url token } context = getActivity(); setHasOptionsMenu(true); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { rootView = inflater.inflate(R.layout.frag_member, container, false); memberList = (RecyclerView) rootView.findViewById(R.id.member_listview); txt_notpresent = (TextView) rootView.findViewById(R.id.txt_notpresent); img_notpresent = (ImageView) rootView.findViewById(R.id.no_members); progressBar = (ProgressBar) rootView.findViewById(R.id.progressBarMember); memberList.setLayoutManager(new LinearLayoutManager(this.getActivity())); //this.token = MoodleSiteInfo.listAll(MoodleSiteInfo.class).get(0).getToken(); members = MoodleMember.find(MoodleMember.class, "courseid = ?", courseid); Collections.sort(members, new Comparator<MoodleMember>() { @Override public int compare(MoodleMember lhs, MoodleMember rhs) { return lhs.getFullname().toLowerCase().trim().compareTo(rhs.getFullname().toLowerCase().trim()); } }); if (members.size() > 0) { txt_notpresent.setVisibility(View.GONE); img_notpresent.setVisibility(View.GONE); } progressBar.setIndeterminate(true); progressBar.setVisibility(View.GONE); madapter = new MemberListAdapter(context, members, token); memberList.setAdapter(madapter); ConnectivityManager connectivityManager = (ConnectivityManager) getActivity() .getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo activeInfo = connectivityManager.getActiveNetworkInfo(); if (activeInfo != null && activeInfo.isConnected()) new LoadMembersTask(context, courseid, token).execute(""); // refresh member list return rootView; } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { super.onCreateOptionsMenu(menu, inflater); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { SearchManager searchManager = (SearchManager) context.getSystemService(Context.SEARCH_SERVICE); searchitem = menu.findItem(R.id.action_search); searchView = (SearchView) MenuItemCompat.getActionView(searchitem); // set up search view searchView.setSearchableInfo(searchManager.getSearchableInfo(getActivity().getComponentName())); searchView.setOnQueryTextListener(this); searchView.setQueryHint("Search name"); searchView.setOnCloseListener(new SearchView.OnCloseListener() { @Override public boolean onClose() { searchView.setQuery("", false); // clears text from search view return true; } }); } } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { default: return super.onOptionsItemSelected(item); } } @Override public boolean onQueryTextSubmit(String query) { return false; } @Override public boolean onQueryTextChange(String query) { final List<MoodleMember> filteredModelList = filter(members, query); madapter.animateTo(filteredModelList, query); memberList.scrollToPosition(0); return true; } private List<MoodleMember> filter(List<MoodleMember> models, String query) { query = query.toLowerCase(); final List<MoodleMember> filteredModelList = new ArrayList<>(); List<MoodleMember> startModelList = new ArrayList<>(); for (MoodleMember model : models) { final String text = model.getFullname().toLowerCase(); if (text.startsWith(query)) { startModelList.add(model); } else if (text.contains(query)) { filteredModelList.add(model); } } startModelList.addAll(filteredModelList); return startModelList; } private class LoadMembersTask extends AsyncTask<String, Integer, Boolean> { Context context; String courseid; MemberSync msync; public LoadMembersTask(Context context, String courseid, String token) { this.context = context; this.courseid = courseid; msync = new MemberSync(token); } @Override protected void onPreExecute() { img_notpresent.setVisibility(View.GONE); txt_notpresent.setVisibility(View.GONE); if (members.size() == 0) progressBar.setVisibility(View.VISIBLE); } @Override protected void onPostExecute(Boolean aBoolean) { //madapter.notifyDataSetChanged(); madapter.updateMemberList(members); progressBar.setVisibility(View.GONE); if (aBoolean) { } else Toast.makeText(context, "Failed to update", Toast.LENGTH_SHORT).show(); if (members.size() == 0) { txt_notpresent.setVisibility(View.VISIBLE); img_notpresent.setVisibility(View.VISIBLE); } } @Override protected Boolean doInBackground(String... params) { boolean sync = msync.syncMembers(courseid); //sync members if (sync) { members = MoodleMember.find(MoodleMember.class, "courseid = ?", courseid); // sorts members in order of firstname in ascending Collections.sort(members, new Comparator<MoodleMember>() { @Override public int compare(MoodleMember lhs, MoodleMember rhs) { return lhs.getFullname().toLowerCase().trim() .compareTo(rhs.getFullname().toLowerCase().trim()); } }); filteredMemList = members; // updates filtered list } return sync; } } private View rootView; private RecyclerView memberList; private ProgressBar progressBar; private SearchView searchView; private TextView txt_notpresent; private ImageView img_notpresent; public MembersFragment() { /* required empty constructor */} }