Java tutorial
/***************************************************************************** * AudioListActivity.java ***************************************************************************** * Copyright 2011-2012 VLC authors and VideoLAN * * 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 2 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, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ package org.videolan.vlc.gui.audio; import android.annotation.TargetApi; import android.app.Activity; import android.content.Intent; import android.os.Build; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.support.design.widget.Snackbar; import android.support.design.widget.TabLayout; import android.support.v4.app.Fragment; import android.support.v4.view.ViewPager; 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.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.widget.AbsListView; import android.widget.AdapterView; import android.widget.AdapterView.AdapterContextMenuInfo; import android.widget.AdapterView.OnItemClickListener; import android.widget.ListView; import android.widget.PopupMenu; import android.widget.PopupMenu.OnMenuItemClickListener; import android.widget.TextView; import org.videolan.libvlc.util.AndroidUtil; import org.videolan.vlc.MediaLibrary; import org.videolan.vlc.MediaWrapper; import org.videolan.vlc.PlaybackServiceClient; import org.videolan.vlc.R; import org.videolan.vlc.VLCApplication; import org.videolan.vlc.gui.AudioPlayerContainerActivity; import org.videolan.vlc.gui.SecondaryActivity; import org.videolan.vlc.util.AndroidDevices; import org.videolan.vlc.util.Util; import org.videolan.vlc.util.WeakHandler; import org.videolan.vlc.widget.SwipeRefreshLayout; import java.io.File; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.List; public class AudioAlbumsSongsFragment extends Fragment implements SwipeRefreshLayout.OnRefreshListener { public final static String TAG = "VLC/AudioAlbumsSongsFragment"; private static final int DELETE_MEDIA = 0; private static final int DELETE_DURATION = 3000; private MediaLibrary mMediaLibrary; private PlaybackServiceClient mClient; private SwipeRefreshLayout mSwipeRefreshLayout; private ViewPager mViewPager; private AudioBrowserListAdapter mSongsAdapter; private AudioBrowserListAdapter mAlbumsAdapter; public final static int MODE_ALBUM = 0; public final static int MODE_SONG = 1; public final static int MODE_TOTAL = 2; // Number of audio browser modes private ArrayList<MediaWrapper> mMediaList; private String mTitle; /* All subclasses of Fragment must include a public empty constructor. */ public AudioAlbumsSongsFragment() { } public void setMediaList(ArrayList<MediaWrapper> mediaList, String title) { mMediaList = mediaList; mTitle = title; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mClient = AudioPlayerContainerActivity.getPlaybackClient(this); mAlbumsAdapter = new AudioBrowserListAdapter(getActivity(), AudioBrowserListAdapter.ITEM_WITH_COVER); mSongsAdapter = new AudioBrowserListAdapter(getActivity(), AudioBrowserListAdapter.ITEM_WITH_COVER); mAlbumsAdapter.setContextPopupMenuListener(mContextPopupMenuListener); mSongsAdapter.setContextPopupMenuListener(mContextPopupMenuListener); mMediaLibrary = MediaLibrary.getInstance(); if (savedInstanceState != null) setMediaList(savedInstanceState.<MediaWrapper>getParcelableArrayList("list"), savedInstanceState.getString("title")); } @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); updateList(); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View v = inflater.inflate(R.layout.audio_albums_songs, container, false); ListView albumsList = (ListView) v.findViewById(R.id.albums); ListView songsList = (ListView) v.findViewById(R.id.songs); List<View> lists = Arrays.asList((View) albumsList, songsList); String[] titles = new String[] { getString(R.string.albums), getString(R.string.songs) }; mViewPager = (ViewPager) v.findViewById(R.id.pager); mViewPager.setOffscreenPageLimit(MODE_TOTAL - 1); mViewPager.setAdapter(new AudioPagerAdapter(lists, titles)); mViewPager.setOnTouchListener(mSwipeFilter); TabLayout mTabLayout = (TabLayout) v.findViewById(R.id.sliding_tabs); mTabLayout.setupWithViewPager(mViewPager); songsList.setAdapter(mSongsAdapter); albumsList.setAdapter(mAlbumsAdapter); songsList.setOnItemClickListener(songsListener); albumsList.setOnItemClickListener(albumsListener); registerForContextMenu(albumsList); registerForContextMenu(songsList); mSwipeRefreshLayout = (SwipeRefreshLayout) v.findViewById(R.id.swipeLayout); mSwipeRefreshLayout.setColorSchemeResources(R.color.orange700); mSwipeRefreshLayout.setOnRefreshListener(this); songsList.setOnScrollListener(mScrollListener); albumsList.setOnScrollListener(mScrollListener); getActivity().setTitle(mTitle); return v; } AbsListView.OnScrollListener mScrollListener = new AbsListView.OnScrollListener() { @Override public void onScrollStateChanged(AbsListView view, int scrollState) { } @Override public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { mSwipeRefreshLayout.setEnabled(firstVisibleItem == 0); } }; @Override public void onRefresh() { updateList(); } @Override public void onSaveInstanceState(Bundle outState) { outState.putParcelableArrayList("list", mMediaList); outState.putString("title", mTitle); super.onSaveInstanceState(outState); } @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { int position = 0; if (menuInfo instanceof AdapterContextMenuInfo) position = ((AdapterContextMenuInfo) menuInfo).position; if (mViewPager.getCurrentItem() == MODE_SONG && mSongsAdapter.getItem(position).mIsSeparator) return; MenuInflater inflater = getActivity().getMenuInflater(); inflater.inflate(R.menu.audio_list_browser, menu); setContextMenuItems(menu, v, position); } private void setContextMenuItems(Menu menu, View v, int position) { if (mViewPager.getCurrentItem() != MODE_SONG) { menu.setGroupVisible(R.id.songs_view_only, false); menu.setGroupVisible(R.id.phone_only, false); } if (!AndroidDevices.isPhone()) menu.setGroupVisible(R.id.phone_only, false); menu.findItem(R.id.audio_list_browser_play).setVisible(true); } @Override public boolean onContextItemSelected(MenuItem menu) { if (!getUserVisibleHint()) return super.onContextItemSelected(menu); AdapterContextMenuInfo info = (AdapterContextMenuInfo) menu.getMenuInfo(); if (info != null && handleContextItemSelected(menu, info.position)) return true; return super.onContextItemSelected(menu); } private boolean handleContextItemSelected(MenuItem item, int position) { int startPosition; List<MediaWrapper> medias; int id = item.getItemId(); boolean useAllItems = id == R.id.audio_list_browser_play_all; boolean append = id == R.id.audio_list_browser_append; if (id == R.id.audio_list_browser_delete) { Snackbar.make(getView(), getString(R.string.file_deleted), Snackbar.LENGTH_LONG) .setAction(android.R.string.cancel, mCancelDeleteMediaListener).show(); Message msg = mHandler.obtainMessage(DELETE_MEDIA, position, 0); mHandler.sendMessageDelayed(msg, DELETE_DURATION); return true; } if (id == R.id.audio_list_browser_set_song) { AudioUtil.setRingtone(mSongsAdapter.getItem(position).mMediaList.get(0), getActivity()); return true; } if (useAllItems) { medias = new ArrayList<MediaWrapper>(); startPosition = mSongsAdapter.getListWithPosition(medias, position); } else { startPosition = 0; switch (mViewPager.getCurrentItem()) { case MODE_ALBUM: // albums medias = mAlbumsAdapter.getMedias(position); break; case MODE_SONG: // songs medias = mSongsAdapter.getMedias(position); break; default: return true; } } if (mClient.isConnected()) { if (append) mClient.append(medias); else mClient.load(medias, startPosition); } return super.onContextItemSelected(item); } private void updateList() { if (mMediaList == null || getActivity() == null) return; final Activity activity = getActivity(); mAlbumsAdapter.clear(); mSongsAdapter.clear(); new Thread(new Runnable() { @Override public void run() { Collections.sort(mMediaList, MediaComparators.byAlbum); activity.runOnUiThread(new Runnable() { @Override public void run() { for (int i = 0; i < mMediaList.size(); ++i) { MediaWrapper media = mMediaList.get(i); mAlbumsAdapter.addSeparator(Util.getMediaReferenceArtist(activity, media), media); mAlbumsAdapter.add(Util.getMediaAlbum(activity, media), null, media); mSongsAdapter.addSeparator(Util.getMediaAlbum(activity, media), media); } mSongsAdapter.sortByAlbum(); mAlbumsAdapter.notifyDataSetChanged(); mSongsAdapter.notifyDataSetChanged(); mSwipeRefreshLayout.setRefreshing(false); } }); } }).start(); } OnItemClickListener albumsListener = new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> av, View v, int p, long id) { ArrayList<MediaWrapper> mediaList = mAlbumsAdapter.getMedias(p); Intent i = new Intent(getActivity(), SecondaryActivity.class); i.putExtra("fragment", SecondaryActivity.ALBUM); i.putParcelableArrayListExtra("list", mediaList); i.putExtra("filter", mAlbumsAdapter.getTitle(p)); startActivity(i); } }; OnItemClickListener songsListener = new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> av, View v, int p, long id) { if (mClient.isConnected()) { final List<MediaWrapper> media = mSongsAdapter.getItem(p).mMediaList; mClient.load(media, 0); } } }; AudioBrowserListAdapter.ContextPopupMenuListener mContextPopupMenuListener = new AudioBrowserListAdapter.ContextPopupMenuListener() { @Override @TargetApi(Build.VERSION_CODES.HONEYCOMB) public void onPopupMenu(View anchor, final int position) { if (!AndroidUtil.isHoneycombOrLater()) { // Call the "classic" context menu anchor.performLongClick(); return; } PopupMenu popupMenu = new PopupMenu(getActivity(), anchor); popupMenu.getMenuInflater().inflate(R.menu.audio_list_browser, popupMenu.getMenu()); setContextMenuItems(popupMenu.getMenu(), anchor, position); popupMenu.setOnMenuItemClickListener(new OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem item) { return handleContextItemSelected(item, position); } }); popupMenu.show(); } }; /* * Disable Swipe Refresh while scrolling horizontally */ private View.OnTouchListener mSwipeFilter = new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { mSwipeRefreshLayout.setEnabled(false); switch (event.getAction()) { case MotionEvent.ACTION_UP: mSwipeRefreshLayout.setEnabled(true); break; } return false; } }; public void clear() { mAlbumsAdapter.clear(); mSongsAdapter.clear(); } View.OnClickListener mCancelDeleteMediaListener = new View.OnClickListener() { @Override public void onClick(View view) { mHandler.removeMessages(DELETE_MEDIA); } }; Handler mHandler = new AudioAlbumsSongsFragmentHandler(this); private static class AudioAlbumsSongsFragmentHandler extends WeakHandler<AudioAlbumsSongsFragment> { public AudioAlbumsSongsFragmentHandler(AudioAlbumsSongsFragment owner) { super(owner); } @Override public void handleMessage(Message msg) { super.handleMessage(msg); final AudioAlbumsSongsFragment fragment = getOwner(); switch (msg.what) { case DELETE_MEDIA: AudioBrowserListAdapter.ListItem listItem = fragment.mSongsAdapter.getItem(msg.arg1); MediaWrapper media = listItem.mMediaList.get(0); final String path = media.getUri().getPath(); fragment.mMediaLibrary.getMediaItems().remove(media); fragment.mSongsAdapter.removeMedia(media); fragment.mAlbumsAdapter.removeMedia(media); if (fragment.mClient.isConnected()) fragment.mClient.removeLocation(media.getLocation()); fragment.mMediaLibrary.getMediaItems().remove(media); new Thread(new Runnable() { public void run() { Util.recursiveDelete(VLCApplication.getAppContext(), new File(path)); } }).start(); break; } } } }