Java tutorial
/* * Copyright (C) 2017 Team Gateship-One * (Hendrik Borghorst & Frederik Luetkes) * * The AUTHORS.md file contains a detailed contributors list: * <https://github.com/gateship-one/malp/blob/master/AUTHORS.md> * * 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 org.gateshipone.malp.application.fragments.serverfragments; import android.content.Context; import android.content.DialogInterface; import android.os.Bundle; import android.support.v4.content.Loader; import android.support.v4.widget.SwipeRefreshLayout; import android.support.v7.app.AlertDialog; import android.view.ContextMenu; import android.view.LayoutInflater; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.AbsListView; import android.widget.AdapterView; import android.widget.ListView; import java.util.List; import org.gateshipone.malp.R; import org.gateshipone.malp.application.adapters.FileAdapter; import org.gateshipone.malp.application.callbacks.FABFragmentCallback; import org.gateshipone.malp.application.callbacks.PlaylistCallback; import org.gateshipone.malp.application.loaders.PlaylistsLoader; import org.gateshipone.malp.application.utils.ThemeUtils; import org.gateshipone.malp.mpdservice.handlers.serverhandler.MPDQueryHandler; import org.gateshipone.malp.mpdservice.mpdprotocol.mpdobjects.MPDFileEntry; import org.gateshipone.malp.mpdservice.mpdprotocol.mpdobjects.MPDPlaylist; public class SavedPlaylistsFragment extends GenericMPDFragment<List<MPDFileEntry>> implements AbsListView.OnItemClickListener { public final static String TAG = SavedPlaylistsFragment.class.getSimpleName(); /** * Adapter used by the ListView */ private FileAdapter mPlaylistAdapter; /** * Main ListView of this fragment */ private ListView mListView; /** * Callback for activity this fragment gets attached to */ private PlaylistCallback mCallback; private FABFragmentCallback mFABCallback = null; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment View rootView = inflater.inflate(R.layout.listview_layout_refreshable, container, false); // Get the main ListView of this fragment mListView = (ListView) rootView.findViewById(R.id.main_listview); // Create the needed adapter for the ListView mPlaylistAdapter = new FileAdapter(getActivity(), true, false); // Combine the two to a happy couple mListView.setAdapter(mPlaylistAdapter); mListView.setOnItemClickListener(this); registerForContextMenu(mListView); // get swipe layout mSwipeRefreshLayout = (SwipeRefreshLayout) rootView.findViewById(R.id.refresh_layout); // set swipe colors mSwipeRefreshLayout.setColorSchemeColors(ThemeUtils.getThemeColor(getContext(), R.attr.colorAccent), ThemeUtils.getThemeColor(getContext(), R.attr.colorPrimary)); // set swipe refresh listener mSwipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { @Override public void onRefresh() { refreshContent(); } }); // Return the ready inflated and configured fragment view. return rootView; } /** * Starts the loader to make sure the data is up-to-date after resuming the fragment (from background) */ @Override public void onResume() { super.onResume(); if (null != mFABCallback) { mFABCallback.setupFAB(false, null); mFABCallback.setupToolbar(getString(R.string.menu_playlists), false, true, false); } } /** * Called when the fragment is first attached to its context. */ @Override public void onAttach(Context context) { super.onAttach(context); // This makes sure that the container activity has implemented // the callback interface. If not, it throws an exception try { mCallback = (PlaylistCallback) context; } catch (ClassCastException e) { throw new ClassCastException(context.toString() + " must implement OnArtistSelectedListener"); } // This makes sure that the container activity has implemented // the callback interface. If not, it throws an exception try { mFABCallback = (FABFragmentCallback) context; } catch (ClassCastException e) { mFABCallback = null; } } /** * Create the context menu. */ @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) { super.onCreateContextMenu(menu, v, menuInfo); MenuInflater inflater = getActivity().getMenuInflater(); inflater.inflate(R.menu.context_menu_playlist, menu); } /** * Hook called when an menu item in the context menu is selected. * * @param item The menu item that was selected. * @return True if the hook was consumed here. */ @Override public boolean onContextItemSelected(MenuItem item) { AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo(); if (info == null) { return super.onContextItemSelected(item); } final MPDPlaylist playlist = (MPDPlaylist) mPlaylistAdapter.getItem(info.position); switch (item.getItemId()) { case R.id.action_add_playlist: MPDQueryHandler.loadPlaylist(playlist.getPath()); return true; case R.id.action_remove_playlist: final AlertDialog.Builder removeListBuilder = new AlertDialog.Builder(getContext()); removeListBuilder.setTitle(getContext().getString(R.string.action_delete_playlist)); removeListBuilder.setMessage(getContext().getString(R.string.dialog_message_delete_playlist) + ' ' + playlist.getSectionTitle() + '?'); removeListBuilder.setPositiveButton(R.string.dialog_action_yes, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { MPDQueryHandler.removePlaylist(playlist.getPath()); mPlaylistAdapter.swapModel(null); getLoaderManager().destroyLoader(0); getLoaderManager().initLoader(0, getArguments(), SavedPlaylistsFragment.this); } }); removeListBuilder.setNegativeButton(R.string.dialog_action_no, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }); removeListBuilder.create().show(); return true; case R.id.action_play_playlist: MPDQueryHandler.playPlaylist(playlist.getPath()); return true; default: return super.onContextItemSelected(item); } } /** * Creates a new Loader that retrieves the list of playlists * * @param id * @param args * @return Newly created loader */ @Override public Loader<List<MPDFileEntry>> onCreateLoader(int id, Bundle args) { return new PlaylistsLoader(getActivity(), false); } /** * When the loader finished its loading of the data it is transferred to the adapter. * * @param loader Loader that finished its loading * @param data Data that was retrieved by the laoder */ @Override public void onLoadFinished(Loader<List<MPDFileEntry>> loader, List<MPDFileEntry> data) { super.onLoadFinished(loader, data); mPlaylistAdapter.swapModel(data); } /** * Resets the loader and clears the model data set * * @param loader The loader that gets cleared. */ @Override public void onLoaderReset(Loader<List<MPDFileEntry>> loader) { // Clear the model data of the used adapter mPlaylistAdapter.swapModel(null); } @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { if (null != mCallback) { MPDPlaylist playlist = (MPDPlaylist) mPlaylistAdapter.getItem(position); mCallback.openPlaylist(playlist.getPath()); } } }