Java tutorial
/* * Copyright (C) 2012 - 2014 Armin Hberling * 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 3 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, see <http://www.gnu.org/licenses/> */ package ch.corten.aha.worldclock; import android.content.ContentUris; import android.content.Context; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.FragmentManager; 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.support.v4.widget.ResourceCursorAdapter; import android.text.TextUtils; import android.view.View; import android.widget.ListView; import android.widget.TextView; import com.actionbarsherlock.app.SherlockFragmentActivity; import com.actionbarsherlock.app.SherlockListFragment; import com.actionbarsherlock.view.Menu; import com.actionbarsherlock.view.MenuInflater; import com.actionbarsherlock.view.MenuItem; import com.actionbarsherlock.widget.SearchView; import com.actionbarsherlock.widget.SearchView.OnQueryTextListener; import org.joda.time.DateTimeZone; import ch.corten.aha.worldclock.provider.WorldClock; import ch.corten.aha.worldclock.provider.WorldClock.Cities; public class AddClockActivity extends SherlockFragmentActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setTitle(R.string.add_city); getSupportActionBar().setDisplayHomeAsUpEnabled(true); FragmentManager fm = getSupportFragmentManager(); // Create the list fragment and add it as our sole content. if (fm.findFragmentById(android.R.id.content) == null) { TimeZoneListFragment listFragment = new TimeZoneListFragment(); fm.beginTransaction().add(android.R.id.content, listFragment).commit(); } } @Override public boolean onSearchRequested() { FragmentManager fm = getSupportFragmentManager(); TimeZoneListFragment fragment = (TimeZoneListFragment) fm.findFragmentById(android.R.id.content); fragment.startSearch(); return true; } public static class TimeZoneListFragment extends SherlockListFragment implements LoaderManager.LoaderCallbacks<Cursor> { private CursorAdapter mAdapter; private SearchView mSearchView; private String mCurFilter; private static final String[] CITY_PROJECTION = { Cities._ID, Cities.NAME, Cities.COUNTRY, Cities.TIMEZONE_ID }; @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); setHasOptionsMenu(true); // use constructor available in gingerbread mAdapter = new ResourceCursorAdapter(getActivity(), R.layout.time_zone_item, null) { @Override public void bindView(View view, Context context, Cursor cursor) { BindHelper.bindText(view, cursor, R.id.city_text, Cities.NAME); BindHelper.bindText(view, cursor, R.id.area_text, Cities.COUNTRY); TextView timeDiffText = (TextView) view.findViewById(R.id.time_diff_text); DateTimeZone tz = DateTimeZone .forID(cursor.getString(cursor.getColumnIndex(Cities.TIMEZONE_ID))); timeDiffText.setText(TimeZoneInfo.getTimeDifferenceString(tz)); TextView timeZoneDescText = (TextView) view.findViewById(R.id.timezone_desc_text); timeZoneDescText.setText(TimeZoneInfo.getDescription(tz)); } }; setListAdapter(mAdapter); setListShown(false); getListView().setFastScrollEnabled(true); getLoaderManager().initLoader(0, null, this); } @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { String selection = null; String[] selectionArgs = null; if (!TextUtils.isEmpty(mCurFilter)) { String search = "%" + mCurFilter + "%"; selection = Cities.ASCII_NAME + " like ? or " + Cities.NAME + " like ? or " + Cities.COUNTRY + " like ?"; selectionArgs = new String[] { search, search, search }; } return new CursorLoader(getActivity(), Cities.CONTENT_URI, CITY_PROJECTION, selection, selectionArgs, null); } @Override public void onLoaderReset(Loader<Cursor> loader) { mAdapter.changeCursor(null); } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor data) { mAdapter.changeCursor(data); // The list should now be shown. if (isResumed()) { setListShown(true); } else { setListShownNoAnimation(true); } } public void startSearch() { mSearchView.setIconified(false); mSearchView.requestFocus(); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { // Place an action bar item for searching. inflater.inflate(R.menu.timezone_list, menu); MenuItem searchItem = menu.findItem(R.id.menu_search); mSearchView = (SearchView) searchItem.getActionView(); mSearchView.setOnQueryTextListener(new OnQueryTextListener() { @Override public boolean onQueryTextChange(String newText) { return TimeZoneListFragment.this.onQueryTextChange(newText); } @Override public boolean onQueryTextSubmit(String query) { return TimeZoneListFragment.this.onQueryTextSubmit(query); } }); } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == android.R.id.home) { getActivity().finish(); return true; } return super.onOptionsItemSelected(item); } private static final String[] ADD_CITY_PROJECTION = { Cities.NAME, Cities.LATITUDE, Cities.LONGITUDE, Cities.COUNTRY, Cities.TIMEZONE_ID }; @Override public void onListItemClick(ListView l, View v, int position, long id) { super.onListItemClick(l, v, position, id); Uri uri = ContentUris.withAppendedId(Cities.CONTENT_URI, id); Cursor c = getActivity().getContentResolver().query(uri, ADD_CITY_PROJECTION, null, null, null); try { c.moveToNext(); String timeZoneId = c.getString(c.getColumnIndex(Cities.TIMEZONE_ID)); String city = c.getString(c.getColumnIndex(Cities.NAME)); String country = c.getString(c.getColumnIndex(Cities.COUNTRY)); int timeDiff = TimeZoneInfo.getTimeDifference(DateTimeZone.forID(timeZoneId)); double latitude = c.getDouble(c.getColumnIndex(Cities.LATITUDE)); double longitude = c.getDouble(c.getColumnIndex(Cities.LONGITUDE)); WorldClock.Clocks.addClock(getActivity(), timeZoneId, city, country, timeDiff, latitude, longitude); returnResult(1); } finally { if (c != null) { c.close(); } } } private void returnResult(int resultCode) { getActivity().setResult(resultCode); getActivity().finish(); } public boolean onQueryTextChange(String newText) { mCurFilter = newText; getLoaderManager().restartLoader(0, null, this); return true; } public boolean onQueryTextSubmit(String query) { return false; } } }