Java tutorial
/* * Copyright (C) 2010 Paul Watts (paulcwatts@gmail.com) * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.onebusaway.android.ui; import org.onebusaway.android.R; import org.onebusaway.android.io.ObaApi; import org.onebusaway.android.io.elements.ObaStop; import org.onebusaway.android.io.request.ObaStopsForLocationRequest; import org.onebusaway.android.io.request.ObaStopsForLocationResponse; import org.onebusaway.android.util.ArrayAdapter; import org.onebusaway.android.util.UIUtils; import android.content.Context; import android.location.Location; import android.os.Bundle; import android.support.v4.app.LoaderManager; import android.support.v4.content.AsyncTaskLoader; import android.support.v4.content.Loader; import android.view.ContextMenu; import android.view.ContextMenu.ContextMenuInfo; import android.view.LayoutInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView.AdapterContextMenuInfo; import android.widget.ListView; import android.widget.TextView; import java.util.Arrays; public class MySearchStopsFragment extends MySearchFragmentBase implements LoaderManager.LoaderCallbacks<ObaStopsForLocationResponse> { //private static final String TAG = "MySearchStopsFragment"; private static final String QUERY_TEXT = "query_text"; public static final String TAB_NAME = "search"; private UIUtils.StopUserInfoMap mStopUserMap; private MyAdapter mAdapter; @Override public void onActivityCreated(Bundle savedInstanceState) { mStopUserMap = new UIUtils.StopUserInfoMap(getActivity()); super.onActivityCreated(savedInstanceState); mAdapter = new MyAdapter(); setListAdapter(mAdapter); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup root, Bundle savedInstanceState) { if (root == null) { // Currently in a layout without a container, so no // reason to create our view. return null; } return inflater.inflate(R.layout.my_search_stop_list, null); } @Override public void onDestroy() { if (mStopUserMap != null) { mStopUserMap.close(); } super.onDestroy(); } @Override public Loader<ObaStopsForLocationResponse> onCreateLoader(int id, Bundle args) { String query = args.getString(QUERY_TEXT); return new MyLoader(getActivity(), query, getSearchCenter()); } @Override public void onLoadFinished(Loader<ObaStopsForLocationResponse> loader, ObaStopsForLocationResponse response) { UIUtils.showProgress(this, false); //Log.d(TAG, "Loader finished"); final int code = response.getCode(); if (code == ObaApi.OBA_OK) { setEmptyText(getString(R.string.find_hint_noresults)); mAdapter.setData(Arrays.asList(response.getStops())); } else if (code != 0) { // If we get anything other than a '0' error, that means // the server actually returned something to us, // (even if it was an error) so we shouldn't show // a 'communication' error. Just fake no results. setEmptyText(getString(R.string.find_hint_noresults)); } else { setEmptyText(getString(R.string.generic_comm_error)); } } @Override public void onLoaderReset(Loader<ObaStopsForLocationResponse> loader) { mAdapter.clear(); } // // Base class // @Override protected void doSearch(String text) { UIUtils.showProgress(this, true); Bundle args = new Bundle(); args.putString(QUERY_TEXT, text); Loader<?> loader = getLoaderManager().restartLoader(0, args, this); loader.onContentChanged(); } @Override protected int getEditBoxHintText() { return R.string.search_stop_hint; } @Override protected int getMinSearchLength() { return 5; } @Override protected CharSequence getHintText() { return getText(R.string.find_hint_nofavoritestops); } @Override public void onListItemClick(ListView l, View v, int position, long id) { ObaStop stop = (ObaStop) l.getAdapter().getItem(position - l.getHeaderViewsCount()); final String shortcutName = stop.getName(); // TODO - Pass in a route mapping? Can we get away with just a stopId here? ArrivalsListActivity.Builder b = new ArrivalsListActivity.Builder(getActivity(), stop.getId()); if (isShortcutMode()) { makeShortcut(shortcutName, b.getIntent()); } else { b.setUpMode(NavHelp.UP_MODE_BACK); b.start(); } } @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { super.onCreateContextMenu(menu, v, menuInfo); AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo; final TextView text = (TextView) info.targetView.findViewById(R.id.stop_name); menu.setHeaderTitle(text.getText()); if (isShortcutMode()) { menu.add(0, CONTEXT_MENU_DEFAULT, 0, R.string.my_context_create_shortcut); } else { menu.add(0, CONTEXT_MENU_DEFAULT, 0, R.string.my_context_get_stop_info); } menu.add(0, CONTEXT_MENU_SHOW_ON_MAP, 0, R.string.my_context_showonmap); } @Override public boolean onContextItemSelected(MenuItem item) { AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo(); switch (item.getItemId()) { case CONTEXT_MENU_DEFAULT: // Fake a click onListItemClick(getListView(), info.targetView, info.position, info.id); return true; case CONTEXT_MENU_SHOW_ON_MAP: showOnMap(getListView(), info.position); return true; default: return super.onContextItemSelected(item); } } private void showOnMap(ListView l, int position) { ObaStop stop = (ObaStop) l.getAdapter().getItem(position - l.getHeaderViewsCount()); final String stopId = stop.getId(); final double lat = stop.getLatitude(); final double lon = stop.getLongitude(); HomeActivity.start(getActivity(), stopId, lat, lon); } // // Adapter // private final class MyAdapter extends ArrayAdapter<ObaStop> { public MyAdapter() { super(getActivity(), R.layout.stop_list_item); } @Override protected void initView(View view, ObaStop stop) { mStopUserMap.setView(view, stop.getId(), stop.getName()); UIUtils.setStopDirection(view.findViewById(R.id.direction), stop.getDirection(), true); } } // // Loader // private static final class MyLoader extends AsyncTaskLoader<ObaStopsForLocationResponse> { private final String mQueryText; private final Location mCenter; public MyLoader(Context context, String query, Location center) { super(context); mQueryText = query; mCenter = center; } @Override public ObaStopsForLocationResponse loadInBackground() { return new ObaStopsForLocationRequest.Builder(getContext(), mCenter).setQuery(mQueryText).build() .call(); } } }