at.alladin.rmbt.android.util.CheckNewsTask.java Source code

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Here is the source code for at.alladin.rmbt.android.util.CheckNewsTask.java

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/*******************************************************************************
 * Copyright 2013-2015 alladin-IT GmbH
 * 
 * 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 at.alladin.rmbt.android.util;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.DialogFragment;
import android.os.AsyncTask;
import at.alladin.openrmbt.android.R;
import at.alladin.rmbt.android.main.RMBTMainActivity;

public class CheckNewsTask extends AsyncTask<Void, Void, JSONArray> {

    private final RMBTMainActivity activity;

    private JSONArray newsList;

    long lastNewsUid;

    ControlServerConnection serverConn;

    public CheckNewsTask(final RMBTMainActivity activity) {
        this.activity = activity;

    }

    @Override
    protected JSONArray doInBackground(final Void... params) {
        serverConn = new ControlServerConnection(activity);

        lastNewsUid = ConfigHelper.getLastNewsUid(activity);

        newsList = serverConn.requestNews(lastNewsUid);

        return newsList;
    }

    @Override
    protected void onCancelled() {
        if (serverConn != null) {
            serverConn.unload();
            serverConn = null;
        }
    }

    @Override
    protected void onPostExecute(final JSONArray newsList) {

        if (newsList != null && newsList.length() > 0 && !serverConn.hasError())
            for (int i = 0; i < newsList.length(); i++)
                if (!isCancelled() && !Thread.interrupted())
                    try {

                        final JSONObject newsItem = newsList.getJSONObject(i);

                        final DialogFragment newFragment = RMBTAlertDialogFragment.newInstance(
                                newsItem.optString("title", activity.getString(R.string.news_title)),
                                newsItem.optString("text", activity.getString(R.string.news_no_message)), null);

                        newFragment.show(activity.getFragmentManager(), "dialog");

                        if (newsItem.has("uid")) {
                            if (lastNewsUid < newsItem.getLong("uid"))
                                lastNewsUid = newsItem.getLong("uid");
                        }
                    } catch (final JSONException e) {
                        e.printStackTrace();
                    }

        ConfigHelper.setLastNewsUid(activity.getApplicationContext(), lastNewsUid);
    }

}