TwitterTimelineActivity.java

/*
 * Copyright 2010-2014 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 org.springframework.android.twitterclient;

import java.util.List;

import org.springframework.social.twitter.api.Tweet;
import org.springframework.social.twitter.api.Twitter;

import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;

/**
 * @author Roy Clarkson
 */
public class TwitterTimelineActivity extends AbstractAsyncListActivity {

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

	private Twitter twitter;

	// ***************************************
	// Activity methods
	// ***************************************
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		this.twitter = getApplicationContext().getConnectionRepository().findPrimaryConnection(Twitter.class).getApi();
	}

	@Override
	public void onStart() {
		super.onStart();
		new FetchTimelineTask().execute();
	}

	// ***************************************
	// Private methods
	// ***************************************
	private void showResult(List<Tweet> tweets) {
		TwitterTimelineListAdapter adapter = new TwitterTimelineListAdapter(this, tweets);
		setListAdapter(adapter);
	}

	// ***************************************
	// Private classes
	// ***************************************
	private class FetchTimelineTask extends AsyncTask<Void, Void, List<Tweet>> {

		@Override
		protected void onPreExecute() {
			// before the network request begins, show a progress indicator
			showProgressDialog("Fetching timeline...");
		}

		@Override
		protected List<Tweet> doInBackground(Void... params) {
			try {
				return twitter.timelineOperations().getHomeTimeline();
			} catch (Exception e) {
				Log.e(TAG, e.getLocalizedMessage(), e);
			}
			return null;
		}

		@Override
		protected void onPostExecute(List<Tweet> tweets) {
			// after the network request completes, hide the progress indicator
			dismissProgressDialog();
			showResult(tweets);
		}

	}

}