Java tutorial
/* * Copyright (C) 2016 Hendrik Borghorst & Frederik Luetkes * * 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.odyssey.fragments; import android.database.Cursor; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.os.RemoteException; import android.provider.MediaStore; import android.support.v4.content.Loader; import android.support.v4.graphics.drawable.DrawableCompat; import android.support.v4.widget.SwipeRefreshLayout; import android.view.ContextMenu; 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.AdapterView; import android.widget.ListView; import org.gateshipone.odyssey.R; import org.gateshipone.odyssey.adapter.TracksAdapter; import org.gateshipone.odyssey.loaders.TrackLoader; import org.gateshipone.odyssey.models.TrackModel; import org.gateshipone.odyssey.utils.MusicLibraryHelper; import org.gateshipone.odyssey.utils.PermissionHelper; import org.gateshipone.odyssey.utils.ThemeUtils; import java.util.List; public class PlaylistTracksFragment extends OdysseyFragment<TrackModel> implements AdapterView.OnItemClickListener { /** * Key values for arguments of the fragment */ // FIXME move to separate class to get unified constants? public final static String ARG_PLAYLISTTITLE = "playlisttitle"; public final static String ARG_PLAYLISTID = "playlistid"; /** * The information of the displayed playlist */ private String mPlaylistTitle = ""; private long mPlaylistID = -1; /** * Called to create instantiate the UI of the fragment. */ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment View rootView = inflater.inflate(R.layout.list_refresh, container, false); // get listview ListView playlistTracksListView = (ListView) rootView.findViewById(R.id.list_refresh_listview); // 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(); } }); mAdapter = new TracksAdapter(getActivity()); playlistTracksListView.setAdapter(mAdapter); playlistTracksListView.setOnItemClickListener(this); registerForContextMenu(playlistTracksListView); // activate options menu in toolbar setHasOptionsMenu(true); Bundle args = getArguments(); mPlaylistTitle = args.getString(ARG_PLAYLISTTITLE); mPlaylistID = args.getLong(ARG_PLAYLISTID); return rootView; } /** * Called when the fragment resumes. * Reload the data, setup the toolbar and create the PBS connection. */ @Override public void onResume() { super.onResume(); if (mToolbarAndFABCallback != null) { // set toolbar behaviour and title mToolbarAndFABCallback.setupToolbar(mPlaylistTitle, false, false, false); // set up play button mToolbarAndFABCallback.setupFAB(new View.OnClickListener() { @Override public void onClick(View v) { playPlaylist(0); } }); } } /** * This method creates a new loader for this fragment. * * @param id The id of the loader * @param bundle Optional arguments * @return Return a new Loader instance that is ready to start loading. */ @Override public Loader<List<TrackModel>> onCreateLoader(int id, Bundle bundle) { return new TrackLoader(getActivity(), mPlaylistID); } /** * Play the playlist from the current position. */ @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { playPlaylist(position); } /** * 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_tracks_fragment, 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); } switch (item.getItemId()) { case R.id.fragment_playlist_tracks_action_enqueue: enqueueTrack(info.position); return true; case R.id.fragment_playlist_tracks_action_enqueueasnext: enqueueTrackAsNext(info.position); return true; case R.id.fragment_playlist_tracks_action_remove: removeTrackFromPlaylist(info.position); return true; default: return super.onContextItemSelected(item); } } /** * Initialize the options menu. * Be sure to call {@link #setHasOptionsMenu} before. * * @param menu The container for the custom options menu. * @param menuInflater The inflater to instantiate the layout. */ @Override public void onCreateOptionsMenu(Menu menu, MenuInflater menuInflater) { // Inflate the menu; this adds items to the action bar if it is present. menuInflater.inflate(R.menu.options_menu_playlist_tracks_fragment, menu); // get tint color int tintColor = ThemeUtils.getThemeColor(getContext(), R.attr.odyssey_color_text_accent); Drawable drawable = menu.findItem(R.id.action_add_playlist_tracks).getIcon(); drawable = DrawableCompat.wrap(drawable); DrawableCompat.setTint(drawable, tintColor); menu.findItem(R.id.action_add_playlist_tracks).setIcon(drawable); super.onCreateOptionsMenu(menu, menuInflater); } /** * Hook called when an menu item in the options menu is selected. * * @param item The menu item that was selected. * @return True if the hook was consumed here. */ @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.action_add_playlist_tracks: enqueuePlaylist(); return true; } return super.onOptionsItemSelected(item); } /** * Call the PBS to enqueue the entire playlist. */ private void enqueuePlaylist() { try { // add playlist mServiceConnection.getPBS().enqueuePlaylist(mPlaylistID); } catch (RemoteException e) { // TODO Auto-generated catch block e.printStackTrace(); } } /** * Call the PBS to play the entire playlist and start with the selected track. * A previous playlist will be cleared. * * @param position the position of the selected track in the adapter */ private void playPlaylist(int position) { try { // clear the current playlist mServiceConnection.getPBS().clearPlaylist(); // add the playlist mServiceConnection.getPBS().enqueuePlaylist(mPlaylistID); // jump to selected track mServiceConnection.getPBS().jumpTo(position); } catch (RemoteException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } /** * Call the PBS to enqueue the selected track. * * @param position the position of the selected track in the adapter */ private void enqueueTrack(int position) { TrackModel track = (TrackModel) mAdapter.getItem(position); try { mServiceConnection.getPBS().enqueueTrack(track, false); } catch (RemoteException e) { // TODO Auto-generated catch block e.printStackTrace(); } } /** * Call the PBS to enqueue the selected track as the next track. * * @param position the position of the selected track in the adapter */ private void enqueueTrackAsNext(int position) { TrackModel track = (TrackModel) mAdapter.getItem(position); try { mServiceConnection.getPBS().enqueueTrack(track, true); } catch (RemoteException e) { // TODO Auto-generated catch block e.printStackTrace(); } } /** * Remove the selected track from the playlist in the mediastore. * * @param position the position of the selected track in the adapter */ private void removeTrackFromPlaylist(int position) { Cursor trackCursor = PermissionHelper.query(getActivity(), MediaStore.Audio.Playlists.Members.getContentUri("external", mPlaylistID), MusicLibraryHelper.projectionPlaylistTracks, "", null, ""); if (trackCursor != null) { if (trackCursor.moveToPosition(position)) { String where = MediaStore.Audio.Playlists.Members._ID + "=?"; String[] whereVal = { trackCursor.getString(trackCursor.getColumnIndex(MediaStore.Audio.Playlists.Members._ID)) }; PermissionHelper.delete(getActivity(), MediaStore.Audio.Playlists.Members.getContentUri("external", mPlaylistID), where, whereVal); // reload data getLoaderManager().restartLoader(0, getArguments(), this); } trackCursor.close(); } } }