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 can.yrt.onebusaway; import can.yrt.oba.provider.ObaContract; import android.app.Activity; import android.content.Intent; import android.database.Cursor; import android.net.Uri; import android.support.v4.widget.SimpleCursorAdapter; import android.text.TextUtils; import android.view.ContextMenu; import android.view.ContextMenu.ContextMenuInfo; import android.view.MenuItem; import android.view.View; import android.widget.AdapterView.AdapterContextMenuInfo; import android.widget.ListView; import android.widget.TextView; abstract class MyRouteListFragmentBase extends MyListFragmentBase implements QueryUtils.RouteList.Columns { // private static final String TAG = "MyRouteListActivity"; @Override protected SimpleCursorAdapter newAdapter() { return QueryUtils.RouteList.newAdapter(getActivity()); } @Override protected Uri getContentUri() { return ObaContract.Routes.CONTENT_URI; } @Override public void onListItemClick(ListView l, View v, int position, long id) { // Get the cursor and fetch the stop ID from that. SimpleCursorAdapter cursorAdapter = (SimpleCursorAdapter) l.getAdapter(); Cursor c = cursorAdapter.getCursor(); c.moveToPosition(position - l.getHeaderViewsCount()); final String routeId = c.getString(COL_ID); final String routeName = c.getString(COL_SHORTNAME); if (isShortcutMode()) { final Intent shortcut = UIHelp.makeShortcut(getActivity(), routeName, RouteInfoActivity.makeIntent(getActivity(), routeId)); Activity activity = getActivity(); activity.setResult(Activity.RESULT_OK, shortcut); activity.finish(); } else { RouteInfoActivity.start(getActivity(), routeId); } } @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.short_name); menu.setHeaderTitle(getString(R.string.route_name, 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_route_info); } menu.add(0, CONTEXT_MENU_SHOW_ON_MAP, 0, R.string.my_context_showonmap); final String url = QueryUtils.RouteList.getUrl(getListView(), info.position); if (!TextUtils.isEmpty(url)) { menu.add(0, CONTEXT_MENU_SHOW_URL, 0, R.string.my_context_show_schedule); } } @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: HomeActivity.start(getActivity(), QueryUtils.RouteList.getId(getListView(), info.position)); return true; case CONTEXT_MENU_SHOW_URL: UIHelp.goToUrl(getActivity(), QueryUtils.RouteList.getUrl(getListView(), info.position)); return true; default: return super.onContextItemSelected(item); } } abstract protected int getEmptyText(); }