Android Open Source - TimeTabler Event Detail Fragment

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License

The source code is released under:
Apache License
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Java Source Code

/*
 * Copyright 2013 Ian Kavanagh/* ww  w . j  av  a  2s.  c om*/
 *
 * 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 ie.clashoftheash.timetabler.ui;

import ie.clashoftheash.timetabler.R;
import ie.clashoftheash.timetabler.provider.Timetable;
import ie.clashoftheash.timetabler.provider.TimetableProvider;
import ie.clashoftheash.timetabler.provider.TimetableUtils;
import ie.clashoftheash.timetabler.ui.dialogs.DeleteEventFragment;
import ie.clashoftheash.timetabler.utils.LoadEvent;

import java.text.DateFormat;
import java.util.Calendar;
import java.util.TimeZone;

import android.app.Fragment;
import android.content.Intent;
import android.content.res.Resources;
import android.database.Cursor;
import android.os.Bundle;
import android.text.format.DateUtils;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.devspark.appmsg.AppMsg;

/**
 * A fragment representing a single Event detail screen. This fragment is either
 * contained in a {@link EventListActivity} in two-pane mode (on tablets) or a
 * {@link EventDetailActivity} on handsets.
 */
public class EventDetailFragment extends Fragment {

  /**
   * The fragment argument representing the event ID that this fragment
   * represents.
   */
  public static final String ARG_EVENT_ID = "event_id";

  private Cursor cursor;

  // Set to the events id after UI populated
  private long id = -1;

  /**
   * Mandatory empty constructor for the fragment manager to instantiate the
   * fragment (e.g. upon screen orientation changes).
   */
  public EventDetailFragment() {
  }

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setHasOptionsMenu(true);

    if (getArguments().containsKey(ARG_EVENT_ID))
      // Load the event content specified by the fragment arguments
      new LoadEvent(getActivity()).execute(getArguments().getLong(
          ARG_EVENT_ID));
    else
      displayEventErrorMessage();
  }

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
      Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_event_detail,
        container, false);

    if (cursor != null)
      populateView();

    return rootView;
  }

  @Override
  public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    super.onCreateOptionsMenu(menu, inflater);
    inflater.inflate(R.menu.fragment_event_detail, menu);
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case R.id.menu_edit_event:
      Intent intent = new Intent(getActivity(), CreateEventActivity.class);
      intent.putExtra(CreateEventActivity.ARG_ITEM_ID, id);
      startActivity(intent);
      return true;
    case R.id.menu_delete_event:
      if (id != -1) {
        View rootView = getView();

        String time = ((TextView) rootView.findViewById(R.id.time))
            .getText().toString();

        DeleteEventFragment.newInstance(
            id,
            ((TextView) rootView.findViewById(R.id.module))
                .getText().toString(),
            time.substring(0, time.indexOf(" ")),
            ((TextView) rootView.findViewById(R.id.date)).getText()
                .toString()).show(getFragmentManager(), null);
      } else
        // TODO: prevent this from occurring however unlikely
        displayEventErrorMessage();
      return true;
    }
    return super.onOptionsItemSelected(item);
  }

  /**
   * Called from parent activity when event has been loaded to populate view
   * 
   * @param c
   *            Cursor holding data to be used for populating view
   */
  void eventLoaded(Cursor c) {
    cursor = c;

    // Check if UI has been inflated before attempting to populate
    try {
      if (getView().findViewById(R.id.event_detail) != null)
        populateView();
    } catch (NullPointerException e) {
      // onCreateView not called yet, UI will be populated in its call,
      // can ignore exception
    }
  }

  private void populateView() {
    // Make sure cursor is on first element
    try {
      if (cursor.moveToFirst()) {
        // Everything ok add data to UI
        View rootView = getView();

        String eventType = cursor
            .getString(TimetableProvider.READ_EVENT_EVENT_TYPE_INDEX);

        View headerView = rootView.findViewById(R.id.event_header);

        TextView eventTypeView = (TextView) rootView
            .findViewById(R.id.event_type);
        TextView weekView = (TextView) rootView.findViewById(R.id.week);
        TextView dateView = (TextView) rootView.findViewById(R.id.date);

        Resources res = getResources();
        // Colour item depending on event type
        if (eventType.equals(getString(R.string.lecture))) {
          headerView
              .setBackgroundColor(res.getColor(R.color.lecture));
        } else if (eventType.equals(getString(R.string.practical))) {
          headerView.setBackgroundColor(res
              .getColor(R.color.practical));
        } else if (eventType.equals(getString(R.string.tutorial))) {
          headerView.setBackgroundColor(res
              .getColor(R.color.tutorial));
        } else if (eventType.equals(getString(R.string.seminar))) {
          headerView
              .setBackgroundColor(res.getColor(R.color.seminar));
        } else {
          eventTypeView.setTextColor(res
              .getColor(android.R.color.primary_text_light));
          weekView.setTextColor(res
              .getColor(android.R.color.primary_text_light));
          dateView.setTextColor(res
              .getColor(android.R.color.primary_text_light));
        }

        eventTypeView.setText(eventType);

        ((TextView) rootView.findViewById(R.id.module)).setText(cursor
            .getString(TimetableProvider.READ_EVENT_MODULE_INDEX));
        ((TextView) rootView.findViewById(R.id.location))
            .setText(cursor
                .getString(TimetableProvider.READ_EVENT_LOCATION_INDEX));
        ((TextView) rootView.findViewById(R.id.lecturer))
            .setText(cursor
                .getString(TimetableProvider.READ_EVENT_LECTURER_INDEX));
        ((TextView) rootView.findViewById(R.id.notes)).setText(cursor
            .getString(TimetableProvider.READ_EVENT_NOTES_INDEX));

        Calendar start = Calendar
            .getInstance(TimetableUtils.TIMEZONE_UTC);
        start.setTimeInMillis(cursor
            .getLong(TimetableProvider.READ_EVENT_START_INDEX));

        start = TimetableUtils.switchTimeZone(start,
            TimeZone.getDefault());

        Calendar end = Calendar
            .getInstance(TimetableUtils.TIMEZONE_UTC);
        end.setTimeInMillis(cursor
            .getLong(TimetableProvider.READ_EVENT_END_INDEX));

        end = TimetableUtils.switchTimeZone(end, TimeZone.getDefault());

        DateFormat timeFormat = android.text.format.DateFormat
            .getTimeFormat(getActivity());

        DateFormat longDateFormat = android.text.format.DateFormat
            .getLongDateFormat(getActivity());

        dateView.setText(longDateFormat.format(start.getTime()));
        weekView.setText(getString(R.string.week) + " "
            + TimetableUtils.getWeekNumber(start.getTimeInMillis()));

        ((TextView) rootView.findViewById(R.id.day)).setText(DateUtils
            .formatDateTime(getActivity(), start.getTimeInMillis(),
                DateUtils.FORMAT_SHOW_WEEKDAY));

        ((TextView) rootView.findViewById(R.id.time))
            .setText(timeFormat.format(start.getTime()) + " - "
                + timeFormat.format(end.getTime()));

        // Setting id after UI filled
        id = cursor
            .getLong(cursor.getColumnIndex(Timetable.Events._ID));

        cursor.close();
      } else
        displayEventErrorMessage();
      // TODO: provide recovery option
    } catch (NullPointerException e) {
      displayEventErrorMessage();
      // TODO: provide recovery option
    }
  }

  /**
   * Helper method to display an error message if we couldn't find the event
   */
  private void displayEventErrorMessage() {
    AppMsg.makeText(getActivity(), R.string.message_no_event_found,
        AppMsg.STYLE_ALERT).show();
  }
}
Java Source Code List
