Java tutorial
/** * ************************************************************************** * BaseBrowserFragment.java * **************************************************************************** * Copyright 2015 VLC authors and VideoLAN * Author: Geoffrey Mtais * * 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.browser; import android.annotation.TargetApi; import android.content.Intent; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.os.Message; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.support.v7.app.AlertDialog; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.PopupMenu; import android.support.v7.widget.RecyclerView; import android.text.TextUtils; import android.util.SparseArray; 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.TextView; import org.videolan.libvlc.Media; import org.videolan.libvlc.util.AndroidUtil; import org.videolan.libvlc.util.MediaBrowser; 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.SecondaryActivity; import org.videolan.vlc.gui.dialogs.CommonDialogs; import org.videolan.vlc.gui.DividerItemDecoration; import org.videolan.vlc.gui.MainActivity; import org.videolan.vlc.gui.SidebarAdapter; import org.videolan.vlc.gui.video.VideoPlayerActivity; import org.videolan.vlc.interfaces.IRefreshable; import org.videolan.vlc.util.Util; import org.videolan.vlc.util.VLCInstance; import org.videolan.vlc.util.VLCRunnable; import org.videolan.vlc.util.WeakHandler; import org.videolan.vlc.widget.ContextMenuRecyclerView; import org.videolan.vlc.widget.SwipeRefreshLayout; import java.util.ArrayList; public abstract class BaseBrowserFragment extends MediaBrowserFragment implements IRefreshable, MediaBrowser.EventListener, SwipeRefreshLayout.OnRefreshListener { protected static final String TAG = "VLC/BaseBrowserFragment"; public static String ROOT = "smb"; public static final String KEY_MRL = "key_mrl"; public static final String KEY_MEDIA = "key_media"; public static final String KEY_MEDIA_LIST = "key_media_list"; public static final String KEY_POSITION = "key_list"; protected BrowserFragmentHandler mHandler; protected MediaBrowser mMediaBrowser; protected ContextMenuRecyclerView mRecyclerView; protected BaseBrowserAdapter mAdapter; protected LinearLayoutManager mLayoutManager; protected TextView mEmptyView; public String mMrl; protected MediaWrapper mCurrentMedia; protected int mSavedPosition = -1, mFavorites = 0; public boolean mRoot; private SparseArray<ArrayList<MediaWrapper>> mMediaLists = new SparseArray<ArrayList<MediaWrapper>>(); private ArrayList<MediaWrapper> mediaList; public int mCurrentParsedPosition = 0; protected abstract Fragment createFragment(); protected abstract void browseRoot(); protected abstract String getCategoryTitle(); public BaseBrowserFragment() { mHandler = new BrowserFragmentHandler(this); mAdapter = new BaseBrowserAdapter(this); } public void onCreate(Bundle bundle) { super.onCreate(bundle); if (bundle == null) bundle = getArguments(); if (bundle != null) { mediaList = bundle.getParcelableArrayList(KEY_MEDIA_LIST); if (mediaList != null) mAdapter.addAll(mediaList); mCurrentMedia = bundle.getParcelable(KEY_MEDIA); if (mCurrentMedia != null) mMrl = mCurrentMedia.getLocation(); else mMrl = bundle.getString(KEY_MRL); mSavedPosition = bundle.getInt(KEY_POSITION); } } public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View v = inflater.inflate(R.layout.directory_browser, container, false); mRecyclerView = (ContextMenuRecyclerView) v.findViewById(R.id.network_list); mEmptyView = (TextView) v.findViewById(android.R.id.empty); mLayoutManager = new LinearLayoutManager(getActivity()); mRecyclerView .addItemDecoration(new DividerItemDecoration(getActivity(), DividerItemDecoration.VERTICAL_LIST)); mRecyclerView.setLayoutManager(mLayoutManager); mRecyclerView.setAdapter(mAdapter); mRecyclerView.addOnScrollListener(mScrollListener); registerForContextMenu(mRecyclerView); mSwipeRefreshLayout = (SwipeRefreshLayout) v.findViewById(R.id.swipeLayout); mSwipeRefreshLayout.setColorSchemeResources(R.color.orange700); mSwipeRefreshLayout.setOnRefreshListener(this); return v; } @Override public void onStart() { super.onStart(); mMediaBrowser = new MediaBrowser(VLCInstance.get(), this); } public void onStop() { super.onStop(); releaseBrowser(); } private void releaseBrowser() { if (mMediaBrowser != null) { mMediaBrowser.release(); mMediaBrowser = null; } } public void onSaveInstanceState(Bundle outState) { outState.putString(KEY_MRL, mMrl); outState.putParcelable(KEY_MEDIA, mCurrentMedia); outState.putParcelableArrayList(KEY_MEDIA_LIST, mediaList); if (mRecyclerView != null) { outState.putInt(KEY_POSITION, mLayoutManager.findFirstCompletelyVisibleItemPosition()); } super.onSaveInstanceState(outState); } public boolean isRootDirectory() { return mRoot; } public String getTitle() { if (mRoot) return getCategoryTitle(); else return mCurrentMedia != null ? mCurrentMedia.getTitle() : mMrl; } @Override protected void display() { if (!mReadyToDisplay) { mReadyToDisplay = true; update(); return; } updateDisplay(); } public void goBack() { if (!mRoot) getActivity().getSupportFragmentManager().popBackStack(); else getActivity().finish(); } public void browse(MediaWrapper media, int position) { FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction(); Fragment next = createFragment(); Bundle args = new Bundle(); ArrayList<MediaWrapper> list = mMediaLists != null ? mMediaLists.get(position) : null; if (list != null && !list.isEmpty()) args.putParcelableArrayList(KEY_MEDIA_LIST, list); args.putParcelable(KEY_MEDIA, media); next.setArguments(args); ft.replace(R.id.fragment_placeholder, next, media.getLocation()); ft.addToBackStack(mMrl); ft.commit(); } @Override public void onMediaAdded(int index, Media media) { mAdapter.addItem(media, mReadyToDisplay && mRoot, mRoot); if (mReadyToDisplay) updateEmptyView(); if (mRoot) mHandler.sendEmptyMessage(BrowserFragmentHandler.MSG_HIDE_LOADING); } @Override public void onMediaRemoved(int index, Media media) { mAdapter.removeItem(index, mReadyToDisplay); } @Override public void onBrowseEnd() { releaseBrowser(); mHandler.sendEmptyMessage(BrowserFragmentHandler.MSG_HIDE_LOADING); if (mReadyToDisplay) display(); } @Override public void onRefresh() { mSavedPosition = mLayoutManager.findFirstCompletelyVisibleItemPosition(); refresh(); } RecyclerView.OnScrollListener mScrollListener = new RecyclerView.OnScrollListener() { @Override public void onScrollStateChanged(RecyclerView recyclerView, int newState) { super.onScrollStateChanged(recyclerView, newState); } @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { int topRowVerticalPosition = (recyclerView == null || recyclerView.getChildCount() == 0) ? 0 : recyclerView.getChildAt(0).getTop(); mSwipeRefreshLayout.setEnabled(topRowVerticalPosition >= 0); } }; /** * Update views visibility and emptiness info */ protected void updateEmptyView() { if (mAdapter.isEmpty()) { mEmptyView.setText(getString(R.string.directory_empty)); mEmptyView.setVisibility(View.VISIBLE); mRecyclerView.setVisibility(View.GONE); mSwipeRefreshLayout.setEnabled(false); } else if (mEmptyView.getVisibility() == View.VISIBLE) { mEmptyView.setVisibility(View.GONE); mRecyclerView.setVisibility(View.VISIBLE); mSwipeRefreshLayout.setEnabled(true); } } protected void update() { update(false); } protected void update(boolean force) { if (mReadyToDisplay) { updateEmptyView(); if (force || mAdapter.isEmpty()) { refresh(); } else { updateDisplay(); } } } protected void updateDisplay() { if (!mAdapter.isEmpty()) { if (mSavedPosition > 0) { mLayoutManager.scrollToPositionWithOffset(mSavedPosition, 0); mSavedPosition = 0; } } mAdapter.notifyDataSetChanged(); parseSubDirectories(); focusHelper(); } @Override public void refresh() { mAdapter.clear(); if (mMediaBrowser == null) mMediaBrowser = new MediaBrowser(VLCInstance.get(), this); else mMediaBrowser.changeEventListener(this); mCurrentParsedPosition = 0; if (mRoot) browseRoot(); else mMediaBrowser.browse(mCurrentMedia != null ? mCurrentMedia.getUri() : Uri.parse(mMrl)); mHandler.sendEmptyMessageDelayed(BrowserFragmentHandler.MSG_SHOW_LOADING, 300); } protected static class BrowserFragmentHandler extends WeakHandler<BaseBrowserFragment> { public static final int MSG_SHOW_LOADING = 0; public static final int MSG_HIDE_LOADING = 1; public BrowserFragmentHandler(BaseBrowserFragment owner) { super(owner); } @Override public void handleMessage(Message msg) { BaseBrowserFragment fragment = getOwner(); switch (msg.what) { case MSG_SHOW_LOADING: fragment.mSwipeRefreshLayout.setRefreshing(true); break; case MSG_HIDE_LOADING: removeMessages(MSG_SHOW_LOADING); fragment.mSwipeRefreshLayout.setRefreshing(false); break; } } } protected void focusHelper() { if (getActivity() == null) return; boolean isEmpty = mAdapter.isEmpty(); MainActivity main = (MainActivity) getActivity(); main.setMenuFocusDown(isEmpty, R.id.network_list); main.setSearchAsFocusDown(isEmpty, getView(), R.id.network_list); } public void clear() { mAdapter.clear(); } @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) { ContextMenuRecyclerView.RecyclerContextMenuInfo info = (ContextMenuRecyclerView.RecyclerContextMenuInfo) menuInfo; if (info != null) setContextMenu(getActivity().getMenuInflater(), menu, info.position); } protected void setContextMenu(MenuInflater inflater, Menu menu, int position) { MediaWrapper mw = (MediaWrapper) mAdapter.getItem(position); boolean canWrite = Util.canWrite(mw.getLocation()); boolean isAudio = mw.getType() == MediaWrapper.TYPE_AUDIO; boolean isVideo = mw.getType() == MediaWrapper.TYPE_VIDEO; if (isAudio || isVideo) { inflater.inflate(R.menu.directory_view_file, menu); menu.findItem(R.id.directory_view_delete).setVisible(canWrite); menu.findItem(R.id.directory_view_info).setVisible(isVideo); } else if (mw.getType() == MediaWrapper.TYPE_DIR) { boolean isEmpty = mMediaLists.get(position) == null || mMediaLists.get(position).isEmpty(); if (canWrite || !isEmpty) { inflater.inflate(R.menu.directory_view_dir, menu); // if (canWrite) { // boolean nomedia = new File(mw.getLocation() + "/.nomedia").exists(); // menu.findItem(R.id.directory_view_hide_media).setVisible(!nomedia); // menu.findItem(R.id.directory_view_show_media).setVisible(nomedia); // } else { // menu.findItem(R.id.directory_view_hide_media).setVisible(false); // menu.findItem(R.id.directory_view_show_media).setVisible(false); // } menu.findItem(R.id.directory_view_play_folder).setVisible(!isEmpty); menu.findItem(R.id.directory_view_delete).setVisible(canWrite); } } } @Override public boolean onContextItemSelected(MenuItem item) { ContextMenuRecyclerView.RecyclerContextMenuInfo info = (ContextMenuRecyclerView.RecyclerContextMenuInfo) item .getMenuInfo(); if (info != null && handleContextItemSelected(item, info.position)) return true; return super.onContextItemSelected(item); } @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); setContextMenu(popupMenu.getMenuInflater(), popupMenu.getMenu(), position); popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem item) { return handleContextItemSelected(item, position); } }); popupMenu.show(); } protected boolean handleContextItemSelected(MenuItem item, int position) { int id = item.getItemId(); if (!(mAdapter.getItem(position) instanceof MediaWrapper)) return super.onContextItemSelected(item); MediaWrapper mw = (MediaWrapper) mAdapter.getItem(position); switch (id) { case R.id.directory_view_play: Util.openMedia(getActivity(), (MediaWrapper) mAdapter.getItem(position)); return true; case R.id.directory_view_append: { PlaybackServiceClient.append(getActivity(), null, mw); return true; } case R.id.directory_view_delete: AlertDialog alertDialog = CommonDialogs.deleteMedia(mw.getType(), getActivity(), mw.getLocation(), new VLCRunnable() { @Override public void run(Object o) { refresh(); } }); alertDialog.show(); return true; case R.id.directory_view_info: Intent i = new Intent(getActivity(), SecondaryActivity.class); i.putExtra("fragment", "mediaInfo"); i.putExtra("param", mw.getUri().toString()); startActivity(i); return true; case R.id.directory_view_play_audio: { PlaybackServiceClient.load(getActivity(), null, mw); return true; } case R.id.directory_view_play_video: VideoPlayerActivity.start(getActivity(), mw.getUri()); return true; case R.id.directory_view_play_folder: ArrayList<MediaWrapper> mediaList = new ArrayList<MediaWrapper>(); for (MediaWrapper mediaItem : mMediaLists.get(position)) { if (mediaItem.getType() == MediaWrapper.TYPE_AUDIO || mediaItem.getType() == MediaWrapper.TYPE_VIDEO) mediaList.add(mediaItem); } Util.openList(getActivity(), mediaList, 0); return true; // case R.id.directory_view_hide_media: // try { // if (new File(mw.getLocation()+"/.nomedia").createNewFile()) // updateLib(); // } catch (IOException e) {} // return true; // case R.id.directory_view_show_media: // if (new File(mw.getLocation()+"/.nomedia").delete()) // updateLib(); // return true; } return false; } protected void parseSubDirectories() { if (mCurrentParsedPosition == -1 || mAdapter.isEmpty()) return; mMediaLists.clear(); if (mMediaBrowser == null) mMediaBrowser = new MediaBrowser(VLCInstance.get(), mFoldersBrowserListener); else mMediaBrowser.changeEventListener(mFoldersBrowserListener); mCurrentParsedPosition = 0; Object item; MediaWrapper mw; while (mCurrentParsedPosition < mAdapter.getItemCount()) { item = mAdapter.getItem(mCurrentParsedPosition); if (item instanceof BaseBrowserAdapter.Storage) { mw = new MediaWrapper(((BaseBrowserAdapter.Storage) item).getUri()); mw.setType(MediaWrapper.TYPE_DIR); } else if (item instanceof MediaWrapper) { mw = (MediaWrapper) item; } else mw = null; if (mw != null) { if (mw.getType() == MediaWrapper.TYPE_DIR || mw.getType() == MediaWrapper.TYPE_PLAYLIST) { mMediaBrowser.browse(mw.getUri()); return; } } ++mCurrentParsedPosition; } } private MediaBrowser.EventListener mFoldersBrowserListener = new MediaBrowser.EventListener() { ArrayList<MediaWrapper> directories = new ArrayList<MediaWrapper>(); ArrayList<MediaWrapper> files = new ArrayList<MediaWrapper>(); @Override public void onMediaAdded(int index, Media media) { int type = media.getType(); if (type == Media.Type.Directory) directories.add(new MediaWrapper(media)); else if (type == Media.Type.File) files.add(new MediaWrapper(media)); } @Override public void onMediaRemoved(int index, Media media) { } @Override public void onBrowseEnd() { if (mAdapter.isEmpty()) { mCurrentParsedPosition = -1; releaseBrowser(); return; } String holderText = getDescription(directories.size(), files.size()); MediaWrapper mw = null; if (!TextUtils.equals(holderText, "")) { mAdapter.setDescription(mCurrentParsedPosition, holderText); directories.addAll(files); mMediaLists.put(mCurrentParsedPosition, new ArrayList<MediaWrapper>(directories)); } while (++mCurrentParsedPosition < mAdapter.getItemCount()) { //skip media that are not browsable if (mAdapter.getItem(mCurrentParsedPosition) instanceof MediaWrapper) { mw = (MediaWrapper) mAdapter.getItem(mCurrentParsedPosition); if (mw.getType() == MediaWrapper.TYPE_DIR || mw.getType() == MediaWrapper.TYPE_PLAYLIST) break; } else if (mAdapter.getItem(mCurrentParsedPosition) instanceof BaseBrowserAdapter.Storage) { mw = new MediaWrapper( ((BaseBrowserAdapter.Storage) mAdapter.getItem(mCurrentParsedPosition)).getUri()); break; } else mw = null; } if (mw != null) { if (mCurrentParsedPosition < mAdapter.getItemCount()) { mMediaBrowser.browse(mw.getUri()); } else { mCurrentParsedPosition = -1; releaseBrowser(); } } else releaseBrowser(); directories.clear(); files.clear(); } private String getDescription(int folderCount, int mediaFileCount) { String holderText = ""; if (folderCount > 0) { holderText += VLCApplication.getAppResources().getQuantityString(R.plurals.subfolders_quantity, folderCount, folderCount); if (mediaFileCount > 0) holderText += ", "; } if (mediaFileCount > 0) holderText += VLCApplication.getAppResources().getQuantityString(R.plurals.mediafiles_quantity, mediaFileCount, mediaFileCount); else if (folderCount == 0 && mediaFileCount == 0) holderText = getString(R.string.directory_empty); return holderText; } }; }