Java tutorial
/* This file is part of the Android Clementine Remote. * Copyright (C) 2013, Andreas Muttscheller <asfa194@gmail.com> * * 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.qspool.clementineremote.ui.fragments; import com.afollestad.materialdialogs.DialogAction; import com.afollestad.materialdialogs.MaterialDialog; import android.app.Fragment; import android.graphics.drawable.ColorDrawable; import android.os.Build; import android.os.Bundle; import android.os.Message; import android.support.v4.content.ContextCompat; import android.support.v7.app.ActionBar; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.SearchView; import android.util.SparseBooleanArray; import android.view.ActionMode; import android.view.ContextMenu; import android.view.ContextMenu.ContextMenuInfo; 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.AbsListView; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.EditText; import android.widget.ListView; import android.widget.Spinner; import java.util.ArrayList; import java.util.LinkedList; import java.util.List; import de.qspool.clementineremote.App; import de.qspool.clementineremote.R; import de.qspool.clementineremote.backend.downloader.DownloadManager; import de.qspool.clementineremote.backend.listener.OnPlaylistReceivedListener; import de.qspool.clementineremote.backend.pb.ClementineMessage; import de.qspool.clementineremote.backend.pb.ClementineMessageFactory; import de.qspool.clementineremote.backend.pb.ClementineRemoteProtocolBuffer.DownloadItem; import de.qspool.clementineremote.backend.player.MyPlaylist; import de.qspool.clementineremote.backend.player.MySong; import de.qspool.clementineremote.backend.player.PlaylistManager; import de.qspool.clementineremote.ui.adapter.PlaylistSongAdapter; import de.qspool.clementineremote.ui.interfaces.BackPressHandleable; import de.qspool.clementineremote.ui.interfaces.RemoteDataReceiver; public class PlaylistFragment extends Fragment implements BackPressHandleable, RemoteDataReceiver { private PlaylistSongAdapter mAdapter; private MaterialDialog mProgressDialog; private ActionBar mActionBar; private Spinner mPlaylistsSpinner; private ListView mList; private View mEmptyPlaylist; private PlaylistManager mPlaylistManager; private OnPlaylistReceivedListener mPlaylistListener; private LinkedList<MyPlaylist> mPlaylists = new LinkedList<>(); private String mFilterText; private boolean mUpdateTrackPositionOnNewTrack = false; private int mSelectionOffset; public PlaylistFragment() { mFilterText = ""; mSelectionOffset = 3; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Get the actionbar mActionBar = ((AppCompatActivity) getActivity()).getSupportActionBar(); setHasOptionsMenu(true); mPlaylistManager = App.Clementine.getPlaylistManager(); mPlaylistListener = new OnPlaylistReceivedListener() { @Override public void onPlaylistSongsReceived(final MyPlaylist p) { getActivity().runOnUiThread(new Runnable() { @Override public void run() { if (mProgressDialog != null) { mProgressDialog.incrementProgress(1); mProgressDialog.setContent(p.getName()); } updateSongList(); } }); } @Override public void onPlaylistReceived(final MyPlaylist p) { } @Override public void onAllRequestedPlaylistSongsReceived() { getActivity().runOnUiThread(new Runnable() { @Override public void run() { if (mProgressDialog != null && mProgressDialog.isShowing()) { mPlaylists = mPlaylistManager.getAllPlaylists(); mProgressDialog.dismiss(); getActivity().invalidateOptionsMenu(); mPlaylistsSpinner .setSelection(mPlaylists.indexOf(mPlaylistManager.getActivePlaylist())); } } }); } @Override public void onAllPlaylistsReceived() { getActivity().runOnUiThread(new Runnable() { @Override public void run() { mPlaylists = mPlaylistManager.getAllPlaylists(); updatePlaylistSpinner(); RequestPlaylistSongs(); } }); } }; } @Override public void onResume() { super.onResume(); // Check if we are still connected if (App.ClementineConnection == null || App.Clementine == null || !App.ClementineConnection.isConnected()) { return; } mPlaylistManager.addOnPlaylistReceivedListener(mPlaylistListener); mPlaylists = mPlaylistManager.getAllPlaylists(); mPlaylistsSpinner.setVisibility(View.VISIBLE); updatePlaylistSpinner(); RequestPlaylistSongs(); // Get the position of the current track if we have one if (App.Clementine.getCurrentSong() != null) { updateViewPosition(); } } @Override public void onPause() { super.onPause(); mPlaylistsSpinner.setVisibility(View.GONE); mPlaylistManager.removeOnPlaylistReceivedListener(mPlaylistListener); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_playlist, container, false); mPlaylists = mPlaylistManager.getAllPlaylists(); mList = (ListView) view.findViewById(R.id.songs); mEmptyPlaylist = view.findViewById(R.id.playlist_empty); // Add Spinner to toolbar mPlaylistsSpinner = (Spinner) getActivity().findViewById(R.id.toolbar_spinner); mPlaylistsSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { updateSongList(); } @Override public void onNothingSelected(AdapterView<?> parent) { } }); updatePlaylistSpinner(); // Create the adapter mAdapter = new PlaylistSongAdapter(getActivity(), R.layout.item_playlist, getSelectedPlaylistSongs()); mList.setOnItemClickListener(oiclSong); mList.setAdapter(mAdapter); mList.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL); mList.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() { @Override public boolean onActionItemClicked(ActionMode mode, android.view.MenuItem item) { SparseBooleanArray checkedPositions = mList.getCheckedItemPositions(); LinkedList<MySong> selectedSongs = new LinkedList<>(); for (int i = 0; i < checkedPositions.size(); ++i) { int position = checkedPositions.keyAt(i); if (checkedPositions.valueAt(i)) { selectedSongs.add(getSelectedPlaylistSongs().get(position)); } } if (!selectedSongs.isEmpty()) { switch (item.getItemId()) { case R.id.playlist_context_play: playSong(selectedSongs.get(0)); mode.finish(); return true; case R.id.playlist_context_download: LinkedList<String> urls = new LinkedList<>(); for (MySong s : selectedSongs) { urls.add(s.getUrl()); } if (!urls.isEmpty()) { DownloadManager.getInstance().addJob( ClementineMessageFactory.buildDownloadSongsMessage(DownloadItem.Urls, urls)); } mode.finish(); return true; case R.id.playlist_context_remove: Message msg = Message.obtain(); msg.obj = ClementineMessageFactory.buildRemoveMultipleSongsFromPlaylist(getPlaylistId(), selectedSongs); App.ClementineConnection.mHandler.sendMessage(msg); mode.finish(); return true; default: return false; } } return false; } @Override public boolean onCreateActionMode(ActionMode mode, android.view.Menu menu) { android.view.MenuInflater inflater = mode.getMenuInflater(); inflater.inflate(R.menu.playlist_context_menu, menu); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) getActivity().getWindow() .setStatusBarColor(ContextCompat.getColor(getActivity(), R.color.grey_cab_status)); return true; } @Override public boolean onPrepareActionMode(ActionMode mode, android.view.Menu menu) { return false; } @Override public void onDestroyActionMode(ActionMode mode) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) getActivity().getWindow() .setStatusBarColor(ContextCompat.getColor(getActivity(), R.color.actionbar_dark)); } @Override public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) { } }); // Filter the results mAdapter.getFilter().filter(mFilterText); mActionBar.setTitle(""); mActionBar.setSubtitle(""); return view; } @Override public void onViewCreated(final View view, final Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); mList.setFastScrollEnabled(true); mList.setTextFilterEnabled(true); mList.setSelector(new ColorDrawable(ContextCompat.getColor(getActivity(), android.R.color.transparent))); mList.setDivider(null); mList.setDividerHeight(0); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.download_playlist: DownloadManager.getInstance().addJob( ClementineMessageFactory.buildDownloadSongsMessage(DownloadItem.APlaylist, getPlaylistId())); return true; case R.id.clear_playlist: new MaterialDialog.Builder(getActivity()).title(R.string.playlist_clear) .content(R.string.playlist_clear_content).positiveText(R.string.playlist_clear_confirm) .negativeText(R.string.dialog_cancel).onPositive(new MaterialDialog.SingleButtonCallback() { @Override public void onClick(MaterialDialog dialog, DialogAction which) { mPlaylistManager.clearPlaylist(getPlaylistId()); updateSongList(); } }).show(); return true; case R.id.close_playlist: Message msg = Message.obtain(); msg.obj = ClementineMessageFactory.buildClosePlaylist(getPlaylistId()); App.ClementineConnection.mHandler.sendMessage(msg); return true; default: return super.onOptionsItemSelected(item); } } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { menu.clear(); inflater.inflate(R.menu.playlist_menu, menu); super.onCreateOptionsMenu(menu, inflater); } @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { super.onCreateContextMenu(menu, v, menuInfo); android.view.MenuInflater inflater = getActivity().getMenuInflater(); inflater.inflate(R.menu.playlist_context_menu, menu); } @Override public void onPrepareOptionsMenu(Menu menu) { // Create a listener for search change SearchView searchView = (SearchView) menu.findItem(R.id.playlist_menu_search).getActionView(); final SearchView.OnQueryTextListener queryTextListener = new SearchView.OnQueryTextListener() { @Override public boolean onQueryTextChange(String newText) { // Set the filter text as the fragments might not yet // created. Only the left and right fragment from the // currently active is created (onCreate() called). // Therefore the other adapters are not yet created, // onCreate filters for this string given in setFilterText() setFilterText(newText); if (getAdapter() != null) { getAdapter().getFilter().filter(newText); } return true; } @Override public boolean onQueryTextSubmit(String query) { // Do something setFilterText(query); if (getAdapter() != null) { getAdapter().getFilter().filter(query); } return true; } }; searchView.setOnQueryTextListener(queryTextListener); searchView.setQueryHint(getString(R.string.playlist_search_hint)); EditText searchText = (EditText) searchView.findViewById(android.support.v7.appcompat.R.id.search_src_text); searchText.setHintTextColor(ContextCompat.getColor(getActivity(), R.color.searchview_edittext_hint)); super.onPrepareOptionsMenu(menu); } /** * Update the underlying data. It reloads the current playlist songs from the Clementine * object. */ public void updateSongList() { // Check if we should update the current view position mAdapter = new PlaylistSongAdapter(getActivity(), R.layout.item_playlist, getSelectedPlaylistSongs()); mList.setAdapter(mAdapter); // We have to post notifyDataSetChanged() here, so fast scroll is set correctly. // Without it, the fast scroll cannot get any child views as the adapter is not yet fully // attached to the view and getChildCount() returns 0. Therefore, fast scroll won't // be enabled. // notifyDataSetChanged() forces the listview to recheck the fast scroll preconditions. mList.post(new Runnable() { @Override public void run() { mAdapter.notifyDataSetChanged(); } }); updateViewPosition(); if (mPlaylists.isEmpty()) { mList.setEmptyView(mEmptyPlaylist); } } /** * Set the text to filter * * @param filterText String, which results are filtered by */ public void setFilterText(String filterText) { mFilterText = filterText; } /** * Get the song adapter * * @return The CustomSongAdapter */ public PlaylistSongAdapter getAdapter() { return mAdapter; } private OnItemClickListener oiclSong = new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View v, int position, long id) { playSong(mAdapter.getItem(position)); } }; private void playSong(MySong song) { Message msg = Message.obtain(); msg.obj = ClementineMessageFactory.buildRequestChangeSong(song.getIndex(), getPlaylistId()); App.ClementineConnection.mHandler.sendMessage(msg); mPlaylistManager.setActivePlaylist(getPlaylistId()); } /** * Set the selection to the currently played item */ private void updateViewPosition() { if (App.Clementine.getCurrentSong() != null && mPlaylistManager.getActivePlaylistId() == getPlaylistId()) { int pos = App.Clementine.getCurrentSong().getIndex(); mList.setSelection(pos - mSelectionOffset); } } public boolean isUpdateTrackPositionOnNewTrack() { return mUpdateTrackPositionOnNewTrack; } public void setUpdateTrackPositionOnNewTrack(boolean updateTrackPositionOnNewTrack, int offset) { this.mUpdateTrackPositionOnNewTrack = updateTrackPositionOnNewTrack; mSelectionOffset = offset; } @Override public void MessageFromClementine(ClementineMessage clementineMessage) { switch (clementineMessage.getMessageType()) { case CURRENT_METAINFO: updateSongList(); break; default: break; } } /** * Sends a request to Clementine to send all songs in all active playlists. */ public void RequestPlaylistSongs() { // If a progress is showing, do not show again! if (mProgressDialog != null && mProgressDialog.isShowing()) { return; } // Open it directly only when we got all playlists int requests = mPlaylistManager.requestAllPlaylistSongs(); if (requests > 0) { // Start a Progressbar mProgressDialog = new MaterialDialog.Builder(getActivity()).progress(false, requests, true) .title(R.string.player_download_playlists).content(R.string.playlist_loading).show(); } else { mPlaylistsSpinner.setSelection(mPlaylists.indexOf(mPlaylistManager.getActivePlaylist())); } } @Override public boolean onBackPressed() { return false; } private void updatePlaylistSpinner() { List<CharSequence> arrayList = new ArrayList<>(); for (int i = 0; i < mPlaylists.size(); i++) { arrayList.add(mPlaylists.get(i).getName()); } ArrayAdapter<CharSequence> adapter = new ArrayAdapter<CharSequence>(getActivity(), android.R.layout.simple_spinner_item, arrayList); // Specify the layout to use when the list of choices appears adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); mPlaylistsSpinner.setAdapter(adapter); } private int getPlaylistId() { return mPlaylists.get(getSelectedPlaylistPosition()).getId(); } private LinkedList<MySong> getSelectedPlaylistSongs() { return mPlaylists.get(getSelectedPlaylistPosition()).getPlaylistSongs(); } private int getSelectedPlaylistPosition() { int pos = mPlaylistsSpinner.getSelectedItemPosition(); if (pos == Spinner.INVALID_POSITION || pos >= mPlaylists.size()) { pos = mPlaylists.indexOf(mPlaylistManager.getActivePlaylist()); mPlaylistsSpinner.setSelection(pos); } return pos; } }