Java tutorial
/* * Copyright (C) 2011-2012 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 com.actionbarsherlock.app.SherlockFragment; import com.actionbarsherlock.app.SherlockFragmentActivity; import com.actionbarsherlock.view.Menu; import com.actionbarsherlock.view.MenuInflater; import com.actionbarsherlock.view.MenuItem; import can.yrt.oba.provider.ObaContract; import android.app.AlertDialog; import android.app.Dialog; import android.content.ContentResolver; import android.content.ContentValues; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.res.Resources; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.DialogFragment; 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.text.format.DateUtils; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.Spinner; import android.widget.TextView; import android.widget.Toast; import java.util.List; public class TripInfoActivity extends SherlockFragmentActivity { private static final String TAG = "TripInfoActivity"; private static final String ROUTE_ID = ".RouteId"; private static final String ROUTE_NAME = ".RouteName"; private static final String STOP_NAME = ".StopName"; private static final String HEADSIGN = ".Headsign"; private static final String DEPARTURE_TIME = ".Depart"; // Save/restore values private static final String TRIP_NAME = ".TripName"; private static final String REMINDER_TIME = ".ReminderTime"; private static final String REMINDER_DAYS = ".ReminderDays"; public static void start(Context context, String tripId, String stopId) { Intent myIntent = new Intent(context, TripInfoActivity.class); myIntent.setData(ObaContract.Trips.buildUri(tripId, stopId)); context.startActivity(myIntent); } public static void start(Context context, String tripId, String stopId, String routeId, String routeName, String stopName, long departureTime, String headsign) { Intent myIntent = new Intent(context, TripInfoActivity.class); myIntent.setData(ObaContract.Trips.buildUri(tripId, stopId)); myIntent.putExtra(ROUTE_ID, routeId); myIntent.putExtra(ROUTE_NAME, routeName); myIntent.putExtra(STOP_NAME, stopName); myIntent.putExtra(DEPARTURE_TIME, departureTime); myIntent.putExtra(HEADSIGN, headsign); context.startActivity(myIntent); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); UIHelp.setupActionBar(this); FragmentManager fm = getSupportFragmentManager(); // Create the list fragment and add it as our sole content. if (fm.findFragmentById(android.R.id.content) == null) { TripInfoFragment content = new TripInfoFragment(); content.setArguments(FragmentUtils.getIntentArgs(getIntent())); fm.beginTransaction().add(android.R.id.content, content).commit(); } } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == android.R.id.home) { finish(); return true; } return false; } TripInfoFragment getTripInfoFragment() { FragmentManager fm = getSupportFragmentManager(); return (TripInfoFragment) fm.findFragmentById(android.R.id.content); } public static final class TripInfoFragment extends SherlockFragment implements LoaderManager.LoaderCallbacks<Cursor> { private static final String TAG_DELETE_DIALOG = ".DeleteDialog"; private static final String[] PROJECTION = { ObaContract.Trips.NAME, ObaContract.Trips.REMINDER, ObaContract.Trips.DAYS, ObaContract.Trips.ROUTE_ID, ObaContract.Trips.HEADSIGN, ObaContract.Trips.DEPARTURE }; private static final int COL_NAME = 0; private static final int COL_REMINDER = 1; private static final int COL_DAYS = 2; private static final int COL_ROUTE_ID = 3; private static final int COL_HEADSIGN = 4; private static final int COL_DEPARTURE = 5; private Uri mTripUri; private String mTripId; private String mRouteId; private String mRouteName; private String mStopId; private String mStopName; private String mHeadsign; private String mTripName; private long mDepartTime; private int mReminderTime; // DB Value, not selection value private int mReminderDays; private boolean mNewTrip = true; @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); setHasOptionsMenu(true); if (savedInstanceState != null) { initFromBundle(savedInstanceState); initForm(); } else if (initFromBundle(getArguments())) { getLoaderManager().initLoader(0, null, this); } else { Log.e(TAG, "Information missing from intent"); return; } } @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.trip_info, null); } @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { return new CursorLoader(getActivity(), mTripUri, PROJECTION, null, null, null); } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor data) { mNewTrip = !initFromCursor(data); initForm(); getActivity().supportInvalidateOptionsMenu(); } @Override public void onLoaderReset(Loader<Cursor> loader) { } private boolean initFromBundle(Bundle bundle) { final Uri data = bundle.getParcelable(FragmentUtils.URI); if (data == null) { return false; } List<String> segments = data.getPathSegments(); mTripId = segments.get(1); mStopId = segments.get(2); mTripUri = data; if (mTripId == null || mStopId == null) { return false; } mRouteId = bundle.getString(ROUTE_ID); mHeadsign = bundle.getString(HEADSIGN); mDepartTime = bundle.getLong(DEPARTURE_TIME); mStopName = bundle.getString(STOP_NAME); mRouteName = bundle.getString(ROUTE_NAME); // If we get this, update it in the DB. if (mRouteName != null) { ContentValues values = new ContentValues(); values.put(ObaContract.Routes.SHORTNAME, mRouteName); ObaContract.Routes.insertOrUpdate(getActivity(), mRouteId, values, false); } String name = bundle.getString(TRIP_NAME); if (name != null) { mTripName = name; } mReminderTime = bundle.getInt(REMINDER_TIME, mReminderTime); mReminderDays = bundle.getInt(REMINDER_DAYS, mReminderDays); return true; } private boolean initFromCursor(Cursor cursor) { if (cursor == null || cursor.getCount() < 1) { // Reminder defaults to 10 in the UI mReminderTime = 10; return false; } cursor.moveToFirst(); mTripName = cursor.getString(COL_NAME); mReminderTime = cursor.getInt(COL_REMINDER); mReminderDays = cursor.getInt(COL_DAYS); // If some values weren't set in the bundle, assign them the // values in the db. if (mRouteId == null) { mRouteId = cursor.getString(COL_ROUTE_ID); } if (mHeadsign == null) { mHeadsign = cursor.getString(COL_HEADSIGN); } if (mDepartTime == 0) { mDepartTime = ObaContract.Trips.convertDBToTime(cursor.getInt(COL_DEPARTURE)); } // If we don't have the route name, look it up in the DB if (mRouteName == null) { mRouteName = TripService.getRouteShortName(getActivity(), mRouteId); } if (mStopName == null) { mStopName = UIHelp.stringForQuery(getActivity(), Uri.withAppendedPath(ObaContract.Stops.CONTENT_URI, mStopId), ObaContract.Stops.NAME); } return true; } private void initForm() { View view = getView(); final Spinner reminder = (Spinner) view.findViewById(R.id.trip_info_reminder_time); ArrayAdapter<?> adapter = ArrayAdapter.createFromResource(getActivity(), R.array.reminder_time, android.R.layout.simple_spinner_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); reminder.setAdapter(adapter); // // Static (header values) // final TextView stopName = (TextView) view.findViewById(R.id.stop_name); stopName.setText(MyTextUtils.toTitleCase(mStopName)); final TextView routeName = (TextView) view.findViewById(R.id.route_name); routeName.setText(getString(R.string.trip_info_route, mRouteName)); final TextView headsign = (TextView) view.findViewById(R.id.headsign); headsign.setText(MyTextUtils.toTitleCase(mHeadsign)); final TextView departText = (TextView) view.findViewById(R.id.departure_time); departText.setText(getDepartureTime(getActivity(), mDepartTime)); final TextView tripName = (TextView) view.findViewById(R.id.name); tripName.setText(mTripName); reminder.setSelection(reminderToSelection(mReminderTime)); final Button repeats = (Button) view.findViewById(R.id.trip_info_reminder_days); repeats.setText(getRepeatText(getActivity(), mReminderDays)); // // Buttons // repeats.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { showReminderDaysDialog(); } }); } void finish() { // TODO: We want to be a better citizen, we should not finish our parents // activity in the case we have some form of dual pane mode for larger screens. // But for now, the retains original, pre-fragment functionality. getActivity().finish(); } @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putParcelable(FragmentUtils.URI, mTripUri); outState.putString(ROUTE_ID, mRouteId); outState.putString(ROUTE_NAME, mRouteName); outState.putString(STOP_NAME, mStopName); outState.putString(HEADSIGN, mHeadsign); outState.putLong(DEPARTURE_TIME, mDepartTime); View view = getView(); Spinner reminderView = (Spinner) view.findViewById(R.id.trip_info_reminder_time); TextView nameView = (TextView) view.findViewById(R.id.name); final int reminder = selectionToReminder(reminderView.getSelectedItemPosition()); outState.putString(TRIP_NAME, nameView.getText().toString()); outState.putInt(REMINDER_TIME, reminder); outState.putInt(REMINDER_DAYS, mReminderDays); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { inflater.inflate(R.menu.trip_info_options, menu); } @Override public void onPrepareOptionsMenu(Menu menu) { menu.findItem(R.id.trip_info_delete).setVisible(!mNewTrip); } @Override public boolean onOptionsItemSelected(MenuItem item) { int id = item.getItemId(); if (id == R.id.trip_info_save) { saveTrip(); } else if (id == R.id.trip_info_delete) { Bundle args = new Bundle(); args.putParcelable("uri", mTripUri); DeleteDialog dialog = new DeleteDialog(); dialog.setArguments(args); dialog.show(getActivity().getSupportFragmentManager(), TAG_DELETE_DIALOG); } else if (id == R.id.show_route) { RouteInfoActivity.start(getActivity(), mRouteId); return true; } else if (id == R.id.show_stop) { new ArrivalsListActivity.Builder(getActivity(), mStopId).setStopName(mStopName).start(); return true; } return false; } public void saveTrip() { // Things that need updating: // Any constant values (trip info not editable by user) // Trip name // Reminder time // Repeats // View view = getView(); final Spinner reminderView = (Spinner) view.findViewById(R.id.trip_info_reminder_time); final TextView nameView = (TextView) view.findViewById(R.id.name); final int reminder = selectionToReminder(reminderView.getSelectedItemPosition()); ContentValues values = new ContentValues(); values.put(ObaContract.Trips.ROUTE_ID, mRouteId); values.put(ObaContract.Trips.DEPARTURE, ObaContract.Trips.convertTimeToDB(mDepartTime)); values.put(ObaContract.Trips.HEADSIGN, mHeadsign); values.put(ObaContract.Trips.NAME, nameView.getText().toString()); values.put(ObaContract.Trips.REMINDER, reminder); values.put(ObaContract.Trips.DAYS, mReminderDays); // Insert or update? ContentResolver cr = getActivity().getContentResolver(); Cursor c = cr.query(mTripUri, new String[] { ObaContract.Trips._ID }, null, null, null); if (c != null && c.getCount() > 0) { // Update cr.update(mTripUri, values, null, null); } else { values.put(ObaContract.Trips._ID, mTripId); values.put(ObaContract.Trips.STOP_ID, mStopId); cr.insert(ObaContract.Trips.CONTENT_URI, values); } if (c != null) { c.close(); } TripService.scheduleAll(getActivity()); Toast.makeText(getActivity(), R.string.trip_info_saved, Toast.LENGTH_SHORT).show(); finish(); } void showReminderDaysDialog() { final boolean[] checks = ObaContract.Trips.daysToArray(mReminderDays); Bundle args = new Bundle(); args.putBooleanArray(ReminderDaysDialog.CHECKS, checks); ReminderDaysDialog frag = new ReminderDaysDialog(); frag.setArguments(args); frag.show(getActivity().getSupportFragmentManager(), ".ReminderDaysDialog"); } public static class ReminderDaysDialog extends DialogFragment implements DialogInterface.OnMultiChoiceClickListener, DialogInterface.OnClickListener { static final String CHECKS = ".checks"; private boolean[] mChecks; @Override public Dialog onCreateDialog(Bundle savedInstanceState) { Bundle args = getArguments(); mChecks = args.getBooleanArray(CHECKS); if (savedInstanceState != null) { mChecks = args.getBooleanArray(CHECKS); } AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); return builder.setTitle(R.string.trip_info_reminder_repeat) .setMultiChoiceItems(R.array.reminder_days, mChecks, this) .setPositiveButton(R.string.trip_info_save, this) .setNegativeButton(R.string.trip_info_dismiss, null).create(); } @Override public void onSaveInstanceState(Bundle outState) { outState.putBooleanArray(CHECKS, mChecks); } @Override public void onClick(DialogInterface dialog, int which) { TripInfoActivity act = (TripInfoActivity) getActivity(); // Get the fragment we want... TripInfoFragment frag = act.getTripInfoFragment(); frag.setReminderDays(mChecks); dialog.dismiss(); } @Override public void onClick(DialogInterface arg0, int which, boolean isChecked) { mChecks[which] = isChecked; } } private void setReminderDays(boolean[] checks) { View view = getView(); mReminderDays = ObaContract.Trips.arrayToDays(checks); final Button repeats = (Button) view.findViewById(R.id.trip_info_reminder_days); repeats.setText(getRepeatText(getActivity(), mReminderDays)); } public static class DeleteDialog extends DialogFragment { @Override public Dialog onCreateDialog(Bundle savedInstanceState) { Bundle args = getArguments(); final Uri tripUri = args.getParcelable("uri"); AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); builder.setMessage(R.string.trip_info_delete_trip).setTitle(R.string.trip_info_delete) .setIcon(android.R.drawable.ic_dialog_alert) .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { ContentResolver cr = getActivity().getContentResolver(); cr.delete(tripUri, null, null); TripService.scheduleAll(getActivity()); getActivity().finish(); } }).setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }); return builder.create(); } } // This converts what's in the database to what can be displayed in the spinner. private static int reminderToSelection(int reminder) { switch (reminder) { case 0: return 0; case 1: return 1; case 3: return 2; case 5: return 3; case 10: return 4; case 15: return 5; case 20: return 6; case 25: return 7; case 30: return 8; default: Log.e(TAG, "Invalid reminder value in DB: " + reminder); return 0; } } private static int selectionToReminder(int selection) { switch (selection) { case 0: return 0; case 1: return 1; case 2: return 3; case 3: return 5; case 4: return 10; case 5: return 15; case 6: return 20; case 7: return 25; case 8: return 30; default: Log.e(TAG, "Invalid selection: " + selection); return 0; } } } static String getDepartureTime(Context ctx, long departure) { return ctx.getString(R.string.trip_info_depart, DateUtils.formatDateTime(ctx, departure, DateUtils.FORMAT_SHOW_TIME | DateUtils.FORMAT_NO_NOON | DateUtils.FORMAT_NO_MIDNIGHT)); } static String getRepeatText(Context ctx, int days) { final Resources res = ctx.getResources(); if ((days & ObaContract.Trips.DAY_ALL) == ObaContract.Trips.DAY_ALL) { return res.getString(R.string.trip_info_repeat_everyday); } if (((days & ObaContract.Trips.DAY_WEEKDAY) == ObaContract.Trips.DAY_WEEKDAY) && (days & ~ObaContract.Trips.DAY_WEEKDAY) == 0) { return res.getString(R.string.trip_info_repeat_weekdays); } if (days == 0) { return res.getString(R.string.trip_info_repeat_norepeat); } // Otherwise, it's not normal -- format a string final boolean[] array = ObaContract.Trips.daysToArray(days); final String[] dayNames = res.getStringArray(R.array.reminder_days); StringBuffer buf = new StringBuffer(); // Find the first day int rangeStart = 0; while (rangeStart < 7) { for (; rangeStart < 7 && array[rangeStart] != true; ++rangeStart) { } if (rangeStart == 7) { break; } int rangeEnd = rangeStart + 1; for (; rangeEnd < 7 && array[rangeEnd] == true; ++rangeEnd) { } if (buf.length() != 0) { // TODO: Move to string table buf.append(", "); } // Single day? if ((rangeEnd - rangeStart) == 1) { buf.append(dayNames[rangeStart]); } else { buf.append(dayNames[rangeStart]); // TODO: Move to string table buf.append(" - "); buf.append(dayNames[rangeEnd - 1]); } rangeStart = rangeEnd; } return res.getString(R.string.trip_info_repeat_every, buf.toString()); } }