Java tutorial
/* * Copyright (C) 2005-2015 Team XBMC * http://xbmc.org * * 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, 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 XBMC Remote; see the file license. If not, write to * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. * http://www.gnu.org/copyleft/gpl.html * */ package org.xbmc.android.remotesandbox.ui; import java.util.List; import org.xbmc.android.jsonrpc.api.FilesAPI.Source; import org.xbmc.android.jsonrpc.client.AbstractClient.ErrorHandler; import org.xbmc.android.jsonrpc.client.FilesClient; import org.xbmc.android.jsonrpc.service.AudioSyncService; import org.xbmc.android.remotesandbox.R; import org.xbmc.android.util.ListLoader; import org.xbmc.android.util.ListLoader.Worker; import android.content.Context; import android.os.Bundle; import android.os.Handler; import android.support.v4.app.ListFragment; import android.support.v4.app.LoaderManager; import android.support.v4.content.Loader; import android.text.TextUtils; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; public class SourcesFragment extends ListFragment implements LoaderManager.LoaderCallbacks<List<Source>> { private static final String TAG = SourcesFragment.class.getSimpleName(); // This is the Adapter being used to display the list's data. private SourceListAdapter mAdapter; // If non-null, this is the current filter the user has provided. private String mCurrentFilter; private final AudioSyncService.RefreshObserver mRefreshObserver = new AudioSyncService.RefreshObserver() { @Override public void onRefreshed() { Log.d(TAG, "Refreshing Artists from database."); getLoaderManager().restartLoader(0, null, SourcesFragment.this); } }; @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); // Give some text to display if there is no data. setEmptyText(getResources().getString(R.string.empty_music_sources)); // We have a menu item to show in action bar. setHasOptionsMenu(true); // Create an empty adapter we will use to display the loaded data. mAdapter = new SourceListAdapter(getActivity()); setListAdapter(mAdapter); // Start out with a progress indicator. setListShown(false); // Prepare the loader. Either re-connect with an existing one, // or start a new one. getLoaderManager().initLoader(0, null, this); } public boolean onQueryTextChange(String newText) { // Called when the action bar search text has changed. Update // the search filter, and restart the loader to do a new query // with this filter. mCurrentFilter = !TextUtils.isEmpty(newText) ? newText : null; getLoaderManager().restartLoader(0, null, this); return true; } @Override public void onListItemClick(ListView l, View v, int position, long id) { // Insert desired behavior here. Source source = (Source) getListAdapter().getItem(position); Log.i("FragmentComplexList", "Item clicked: " + source.path); } @Override public Loader<List<Source>> onCreateLoader(int id, Bundle args) { // This is called when a new Loader needs to be created. This // sample only has one Loader with no arguments, so it is simple. final Handler h = new Handler(); return new ListLoader<Source>(getActivity(), new Worker<Source>() { @Override public List<Source> doWork() { final FilesClient filesClient = new FilesClient(); return filesClient.getMusicSources(new ErrorHandler() { @Override public void handleError(int code, final String message) { Log.e(TAG, "ERROR " + code + ": " + message); h.post(new Runnable() { @Override public void run() { Toast.makeText(getActivity(), "ERROR: " + message, Toast.LENGTH_LONG).show(); } }); } }); } }); } @Override public void onLoadFinished(Loader<List<Source>> loader, List<Source> data) { if (!isVisible()) { return; } // Set the new data in the adapter. mAdapter.setData(data); // The list should now be shown. if (isResumed()) { setListShown(true); } else { setListShownNoAnimation(true); } } @Override public void onLoaderReset(Loader<List<Source>> loader) { // Clear the data in the adapter. mAdapter.setData(null); } @Override public void onResume() { super.onResume(); if (getActivity() instanceof BaseFragmentTabsActivity) { ((BaseFragmentTabsActivity) getActivity()).registerRefreshObserver(mRefreshObserver); } getLoaderManager().restartLoader(0, null, this); } @Override public void onPause() { super.onPause(); if (getActivity() instanceof BaseFragmentTabsActivity) { ((BaseFragmentTabsActivity) getActivity()).unregisterRefreshObserver(mRefreshObserver); } } public static class SourceListAdapter extends ArrayAdapter<Source> { private final LayoutInflater mInflater; public SourceListAdapter(Context context) { super(context, android.R.layout.simple_list_item_2); mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); } public void setData(List<Source> data) { clear(); if (data != null) { for (Source source : data) { add(source); } } } /** * Populate new items in the list. */ @Override public View getView(int position, View convertView, ViewGroup parent) { View view; if (convertView == null) { view = mInflater.inflate(R.layout.list_item_onelabel, parent, false); } else { view = convertView; } Source item = getItem(position); ((TextView) view.findViewById(R.id.item_title)).setText(item.label); return view; } } }