com.springsource.greenhouse.events.EventsActivity.java Source code

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Here is the source code for com.springsource.greenhouse.events.EventsActivity.java

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/*
 * Copyright 2011 the original author or authors.
 *
 * 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.springsource.greenhouse.events;

import java.util.List;

import org.springframework.social.greenhouse.api.Event;

import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.ListView;

import com.springsource.greenhouse.AbstractGreenhouseListActivity;
import com.springsource.greenhouse.R;

/**
 * @author Roy Clarkson
 */
public class EventsActivity extends AbstractGreenhouseListActivity {

    protected static final String TAG = EventsActivity.class.getSimpleName();

    private List<Event> upcomingEvents;

    //***************************************
    // Activity methods
    //***************************************
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public void onStart() {
        super.onStart();

        if (upcomingEvents == null) {
            downloadEvents();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.events_menu, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle item selection
        switch (item.getItemId()) {
        case R.id.events_menu_refresh:
            downloadEvents();
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }

    //***************************************
    // ListActivity methods
    //***************************************
    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        super.onListItemClick(l, v, position, id);

        Event event = upcomingEvents.get(position);
        getApplicationContext().setSelectedEvent(event);
        startActivity(new Intent(this, EventDetailsActivity.class));
    }

    //***************************************
    // Private methods
    //***************************************
    private void refreshEvents(List<Event> upcomingEvents) {
        this.upcomingEvents = upcomingEvents;

        if (upcomingEvents == null) {
            return;
        }

        setListAdapter(new EventsListAdapter(this, upcomingEvents));
    }

    private void downloadEvents() {
        new DownloadEventsTask().execute();
    }

    //***************************************
    // Private classes
    //***************************************
    private class DownloadEventsTask extends AsyncTask<Void, Void, List<Event>> {

        private Exception exception;

        @Override
        protected void onPreExecute() {
            showProgressDialog();
        }

        @Override
        protected List<Event> doInBackground(Void... params) {
            try {
                return getApplicationContext().getGreenhouseApi().eventOperations().getUpcomingEvents();
            } catch (Exception e) {
                Log.e(TAG, e.getLocalizedMessage(), e);
                exception = e;
            }

            return null;
        }

        @Override
        protected void onPostExecute(List<Event> result) {
            dismissProgressDialog();
            processException(exception);
            refreshEvents(result);
        }
    }
}