com.ubikod.urbantag.UrbanTagApplication.java Source code

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Here is the source code for com.ubikod.urbantag.UrbanTagApplication.java

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/*
 * Copyright 2012 Ubikod
 * 
 * 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.ubikod.urbantag;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;

import android.content.Context;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.util.Log;

import com.ubikod.capptain.android.sdk.CapptainApplication;
import com.ubikod.urbantag.model.DatabaseHelper;
import com.ubikod.urbantag.model.Tag;
import com.ubikod.urbantag.model.TagManager;

/**
 * Application start. Fetch tags list. Initiate wifi enbaling advice message
 * @author cdesneuf
 */
public class UrbanTagApplication extends CapptainApplication {
    /**
     * Action to perform in order to get tag list update
     */
    private static final String ACTION_FETCH_TAGS_LIST = "tag/get/all";

    @Override
    protected void onApplicationProcessCreate() {
        Log.i(UrbanTag.TAG, "Launching App !");

        /* re initiate wifi message display */
        SharedPreferences pref = getApplicationContext().getSharedPreferences("URBAN_TAG_PREF",
                Context.MODE_PRIVATE);
        pref.edit().putBoolean("notifiedWifi", false).commit();

        /* Fetch tags list */
        AsyncTask<Void, Void, List<Tag>> updateTagList = new AsyncTask<Void, Void, List<Tag>>() {

            @Override
            protected List<Tag> doInBackground(Void... v) {
                List<Tag> res = new ArrayList<Tag>();
                HttpClient client = new DefaultHttpClient();
                HttpGet request = new HttpGet(UrbanTag.API_URL + ACTION_FETCH_TAGS_LIST);
                Log.i(UrbanTag.TAG, "Fetching tags list on : " + request.getURI().toString());
                try {
                    HttpResponse response = client.execute(request);
                    BufferedReader rd = new BufferedReader(
                            new InputStreamReader(response.getEntity().getContent()));

                    String textResponse = "";
                    String line = "";
                    while ((line = rd.readLine()) != null) {
                        textResponse += line;
                    }
                    Log.i(UrbanTag.TAG, "Received :" + textResponse);
                    JSONArray jsonTagsArray = new JSONArray(textResponse);

                    for (int i = 0; i < jsonTagsArray.length(); i++) {
                        Tag t = TagManager.createTag(jsonTagsArray.getJSONObject(i));
                        if (t != null) {
                            res.add(t);
                        }
                    }
                } catch (ClientProtocolException cpe) {
                    Log.e(UrbanTag.TAG, cpe.getMessage());
                } catch (IOException ioe) {
                    Log.e(UrbanTag.TAG, ioe.getMessage());
                } catch (JSONException je) {
                    Log.e(UrbanTag.TAG, je.getMessage());
                }

                return res;
            }

            @Override
            protected void onPostExecute(List<Tag> list) {
                TagManager tagManager = new TagManager(new DatabaseHelper(getApplicationContext(), null));
                if (list.size() > 0)
                    tagManager.update(list);
            }
        };

        updateTagList.execute();
    }
}