at.ac.uniklu.mobile.sportal.util.LocalBroadcastCommunicator.java Source code

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Here is the source code for at.ac.uniklu.mobile.sportal.util.LocalBroadcastCommunicator.java

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/*
 * Copyright (c) 2014 Mario Guggenberger <mario.guggenberger@aau.at>
 *
 * This file is part of AAU Studentenportal.
 *
 * AAU Studentenportal is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * AAU Studentenportal is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with AAU Studentenportal.  If not, see <http://www.gnu.org/licenses/>.
 */

package at.ac.uniklu.mobile.sportal.util;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.support.v4.content.LocalBroadcastManager;

public abstract class LocalBroadcastCommunicator extends BroadcastReceiver {

    // the action name used to send and receive intents
    private static String sAction = null;

    private static <T> void registerReceiver(LocalBroadcastCommunicator receiver, Context context) {
        sAction = receiver.getClass().getName();
        LocalBroadcastManager.getInstance(context).registerReceiver(receiver, new IntentFilter(sAction));
    }

    private static <T> void unregisterReceiver(LocalBroadcastCommunicator receiver, Context context) {
        LocalBroadcastManager.getInstance(context).unregisterReceiver(receiver);
    }

    public static void sendBroadcast(Context context, Intent intent) {
        if (sAction == null) {
            /* If sAction is null at this point, no receiver has been registered yet and there's no
             * point in sending a broadcast. */
            return;
        }

        intent.setAction(sAction);
        LocalBroadcastManager.getInstance(context).sendBroadcast(intent);
    }

    public void registerReceiver(Context context) {
        registerReceiver(this, context);
    }

    public void unregisterReceiver(Context context) {
        unregisterReceiver(this, context);
    }
}