Java tutorial
/* * Copyright (C) 2013 Andy Klay * * This program 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. * * This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */ package de.fhb.mi.paperfly.user; import android.app.Activity; import android.app.Fragment; import android.app.FragmentManager; import android.app.ListFragment; import android.app.SearchManager; import android.content.Context; import android.graphics.Color; import android.os.AsyncTask; import android.os.Bundle; import android.support.v4.widget.DrawerLayout; 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.ArrayAdapter; import android.widget.ListView; import android.widget.SearchView; import android.widget.TextView; import android.widget.Toast; import java.util.List; import de.fhb.mi.paperfly.R; import de.fhb.mi.paperfly.dto.AccountDTO; import de.fhb.mi.paperfly.service.RestConsumerException; import de.fhb.mi.paperfly.service.RestConsumerSingleton; import de.fhb.mi.paperfly.util.AsyncDelegate; /** * ListView of private contacts, a friend list * * @author Andy Klay (klay@fh-brandenburg.de) * @author Christoph Ott */ public class FriendListFragment extends ListFragment implements AsyncDelegate { public static final String TAG = FriendListFragment.class.getSimpleName(); private View rootView; private FriendListAdapter listAdapter; private DrawerLayout drawerLayout; private List<AccountDTO> myFriendList; private TextView emptyView; @Override public void asyncComplete(boolean success) { listAdapter.addAll(myFriendList); listAdapter.notifyDataSetChanged(); emptyView.setText(getResources().getString(R.string.no_friends)); } private void initViewsById() { emptyView = (TextView) rootView.findViewById(android.R.id.empty); } @Override public void onAttach(Activity activity) { super.onAttach(activity); Log.d(TAG, "onAttach"); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { if (menu != null) { inflater.inflate(R.menu.user_friends, menu); } SearchManager searchManager = (SearchManager) getActivity().getSystemService(Context.SEARCH_SERVICE); SearchView searchView = (SearchView) menu.findItem(R.id.action_search_user).getActionView(); // Get the menu item from the action bar MenuItem menuItem = menu.findItem(R.id.action_search_user); menuItem.setOnActionExpandListener(new MenuItem.OnActionExpandListener() { @Override public boolean onMenuItemActionCollapse(MenuItem item) { Log.d(TAG, "Search deactivated. Unlocking drawers."); drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED); return true; } @Override public boolean onMenuItemActionExpand(MenuItem item) { Log.d(TAG, "Search activated. Locking drawers."); drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED); return true; } }); // Assumes current activity is the searchable activity searchView.setSearchableInfo(searchManager.getSearchableInfo(getActivity().getComponentName())); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { Log.d(TAG, "onCreateView"); this.rootView = inflater.inflate(R.layout.fragment_friends, container, false); initViewsById(); this.drawerLayout = (DrawerLayout) container.getParent(); setHasOptionsMenu(true); getActivity().setTitle(R.string.nav_item_open_friendlist); UpdateAccountTask updateAccountTask = new UpdateAccountTask(this); updateAccountTask.execute(); listAdapter = new FriendListAdapter(rootView.getContext()); setListAdapter(listAdapter); return rootView; } @Override public void onDestroy() { super.onDestroy(); Log.d(TAG, "onDestroy"); } @Override public void onDetach() { super.onDetach(); Log.d(TAG, "onDetach"); } @Override public void onListItemClick(ListView l, View v, int position, long id) { Log.d(TAG, "onItemClick"); Fragment fragment = new UserProfileFragment(); Bundle args = new Bundle(); args.putString(UserProfileFragment.ARGS_USER, listAdapter.getItem(position).getUsername()); args.putBoolean(UserProfileFragment.ARGS_USER_IS_FRIEND, true); fragment.setArguments(args); // Insert the fragment by replacing any existing fragment FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit(); } @Override public boolean onOptionsItemSelected(MenuItem item) { return super.onOptionsItemSelected(item); } @Override public void onPause() { super.onPause(); Log.d(TAG, "onPause"); } @Override public void onResume() { super.onResume(); Log.d(TAG, "onResume"); } @Override public void onStart() { super.onStart(); } @Override public void onStop() { super.onStop(); Log.d(TAG, "onStop"); } /** * Represents an asynchronous GetMyAccountTask used to get an user */ public class UpdateAccountTask extends AsyncTask<String, Void, Boolean> { private AsyncDelegate delegate; public UpdateAccountTask(AsyncDelegate delegate) { this.delegate = delegate; } @Override protected Boolean doInBackground(String... params) { try { myFriendList = RestConsumerSingleton.getInstance().getMyFriendList(); } catch (RestConsumerException e) { Log.d(TAG, e.getMessage()); return false; } return true; } @Override protected void onPostExecute(final Boolean success) { if (success) { delegate.asyncComplete(true); } else { Toast.makeText(getActivity(), "Friendlist could not be loaded.", Toast.LENGTH_LONG).show(); } } } public class FriendListAdapter extends ArrayAdapter<AccountDTO> { private final Context context; public FriendListAdapter(Context context) { super(context, 0); this.context = context; } @Override public View getView(int position, View convertView, ViewGroup parent) { LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); View rowView = inflater.inflate(android.R.layout.simple_list_item_2, parent, false); TextView textView = (TextView) rowView.findViewById(android.R.id.text1); TextView textView2 = (TextView) rowView.findViewById(android.R.id.text2); final AccountDTO friendAccount = this.getItem(position); textView.setText(friendAccount.getUsername()); textView2.setText(friendAccount.getStatus().name()); switch (friendAccount.getStatus()) { case ONLINE: textView2.setTextColor(Color.GREEN); break; case OFFLINE: textView2.setTextColor(Color.RED); break; case AWAY: textView2.setTextColor(Color.YELLOW); break; } return rowView; } } }