Java tutorial
/* * Copyright (C) 2009 Johan Nilsson <http://markupartist.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 com.markupartist.sthlmtraveling; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.database.Cursor; import android.os.Bundle; import android.os.Parcelable; import android.support.v4.app.LoaderManager; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.support.v4.widget.CursorAdapter; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; import com.markupartist.sthlmtraveling.provider.HistoryDbAdapter; import com.markupartist.sthlmtraveling.provider.site.Site; public class SearchDeparturesFragment extends BaseListFragment implements LoaderManager.LoaderCallbacks<Cursor> { private static final int REQUEST_CODE_PICK_SITE = 1; private static final int LOADER_HISTORY = 1; static String TAG = "SearchDeparturesActivity"; private boolean mCreateShortcut; private HistoryDbAdapter mHistoryDbAdapter; private HistoryAdapter mHistoryAdapter; private View mHistorySubtitle; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // If the activity was started with the "create shortcut" action, we // remember this to change the behavior upon a search. if (Intent.ACTION_CREATE_SHORTCUT.equals(getActivity().getIntent().getAction())) { mCreateShortcut = true; registerScreen("Create departure shortcut"); } mHistoryDbAdapter = new HistoryDbAdapter(getActivity()).open(); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.search_departures_fragment, container, false); } @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); mHistoryAdapter = new HistoryAdapter(getActivity()); initViews(); setListAdapter(mHistoryAdapter); } @Override public void onResume() { super.onResume(); getLoaderManager().restartLoader(LOADER_HISTORY, null, this); } private void initViews() { View searchHeader = getActivity().getLayoutInflater().inflate(R.layout.search_departures_header, null); getListView().addHeaderView(searchHeader, null, false); searchHeader.findViewById(R.id.sites).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent searchIntent = new Intent(getActivity(), PlaceSearchActivity.class); searchIntent.putExtra(PlaceSearchActivity.ARG_ONLY_STOPS, true); startActivityForResult(searchIntent, REQUEST_CODE_PICK_SITE); } }); searchHeader.findViewById(R.id.btn_nearby_stops).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent i = new Intent(getActivity().getApplicationContext(), NearbyActivity.class); startActivityWithDefaultTransition(i); } }); mHistorySubtitle = searchHeader.findViewById(R.id.departure_history_subtitle); } @Override public void onDestroyView() { setListAdapter(null); super.onDestroyView(); } @Override public void onDestroy() { super.onDestroy(); mHistoryDbAdapter.close(); } @Override public void onListItemClick(ListView l, View v, int position, long id) { Cursor historyCursor = ((HistoryAdapter) this.getListAdapter()).getCursor(); Site site = HistoryDbAdapter.mapToSite(historyCursor); if (mCreateShortcut) { onCreateShortCut(site); } else { onSearchDepartures(site); } } private void dispatchSearch(Site stop) { if (stop.hasName()) { if (mCreateShortcut) { onCreateShortCut(stop); } else { onSearchDepartures(stop); } } } private void onSearchDepartures(Site stop) { mHistoryDbAdapter.create(HistoryDbAdapter.TYPE_JOURNEY_PLANNER_SITE, stop); Intent i = new Intent(getActivity().getApplicationContext(), DeparturesActivity.class); i.putExtra(DeparturesActivity.EXTRA_SITE, stop); startActivityWithDefaultTransition(i); } private void onCreateShortCut(Site stop) { // Setup the intent to be launched Intent shortcutIntent = new Intent(getActivity().getApplicationContext(), DeparturesShortcutProxyActivity.class); shortcutIntent.setAction(Intent.ACTION_VIEW); shortcutIntent.putExtra(DeparturesActivity.EXTRA_SITE_NAME, stop.getName()); shortcutIntent.putExtra(DeparturesActivity.EXTRA_SITE_ID, stop.getId()); shortcutIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); // Then, set up the container intent (the response to the caller) Intent intent = new Intent(); intent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent); intent.putExtra(Intent.EXTRA_SHORTCUT_NAME, stop.getName()); Parcelable iconResource = Intent.ShortcutIconResource.fromContext(getActivity(), R.drawable.shortcut_departures); intent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, iconResource); // Now, return the result to the launcher getActivity().setResult(Activity.RESULT_OK, intent); getActivity().finish(); } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { getLoaderManager().restartLoader(LOADER_HISTORY, null, this); switch (requestCode) { case REQUEST_CODE_PICK_SITE: if (resultCode == Activity.RESULT_OK) { dispatchSearch((Site) data.getParcelableExtra(PlaceSearchActivity.EXTRA_PLACE)); } break; } } @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { switch (id) { case LOADER_HISTORY: return new HistoryLoader(getActivity(), mHistoryDbAdapter); } return null; } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor data) { switch (loader.getId()) { case LOADER_HISTORY: mHistoryAdapter.swapCursor(data); if (mHistoryAdapter.getCount() > 0) { mHistorySubtitle.setVisibility(View.VISIBLE); } else { mHistorySubtitle.setVisibility(View.GONE); } break; } } @Override public void onLoaderReset(Loader<Cursor> loader) { switch (loader.getId()) { case LOADER_HISTORY: mHistoryAdapter.swapCursor(null); break; } } private static class HistoryLoader extends CursorLoader { private HistoryDbAdapter mHistoryDbAdapter; public HistoryLoader(Context context, HistoryDbAdapter historyDbAdapter) { super(context); mHistoryDbAdapter = historyDbAdapter; } @Override public Cursor loadInBackground() { return mHistoryDbAdapter.fetchStops(); } } private static class HistoryAdapter extends CursorAdapter { public HistoryAdapter(Context context) { super(context, null, CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER); } @Override public View newView(Context context, Cursor cursor, ViewGroup parent) { return LayoutInflater.from(context).inflate(R.layout.row_icon_two_rows, parent, false); } @Override public void bindView(View view, Context context, Cursor cursor) { Site site = HistoryDbAdapter.mapToSite(cursor); ((TextView) view.findViewById(R.id.text1)).setText(site.getName()); TextView text2 = (TextView) view.findViewById(R.id.text2); ImageView icon = (ImageView) view.findViewById(R.id.row_icon); if (site.getLocality() != null) { text2.setText(site.getLocality()); text2.setVisibility(View.VISIBLE); } else { text2.setVisibility(View.GONE); } icon.setImageResource(R.drawable.ic_history_24dp); } } }