Android Open Source - mobile-android Conference Application

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License

The source code is released under:

MIT License

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Java Source Code

package com.manyconf.conference;
//from   w  ww .  ja v a  2 s  .c om
import android.app.Application;
import android.content.Context;
import android.content.Intent;
import android.support.v4.content.LocalBroadcastManager;
import android.util.Log;

import java.util.ArrayList;
import java.util.LinkedHashMap;

/**
 * This class extends the (by default present) Application class, which is a singleton. We use
 * it here to store global variables.
 */
public class ConferenceApplication extends Application implements ConferenceBuilderDelegate {

    public static Context context;

    private ConferenceBuilder cachedConfBuilder;
    private ConferenceBuilder confBuilder;
    private LinkedHashMap<Integer, ConferenceModel> conferenceList;

    private String lastError;

    public static final String mod = "manyconf.appl";


    @Override public void onCreate() {
        super.onCreate();
        context = getApplicationContext();

    }

    public void fetchCachedConferences() {
        Log.d(mod, "fetchCachedConferences()");
        if(cachedConfBuilder != null) {
            cachedConfBuilder.cancel(true);
        }
        cachedConfBuilder = new ConferenceBuilder(this, getBaseContext(), true);
        cachedConfBuilder.execute();
        Log.d(mod, "kicked off async task to show cache");
    }

    public void fetchConferences() {
        Log.d(mod, "fetchConferences()");
        if(confBuilder != null) {
            confBuilder.cancel(true);
        }
        confBuilder = new ConferenceBuilder(this, getBaseContext(), false);
        confBuilder.execute();
        Log.d(mod, "kicked off async task to retrieve from network");
    }

    public LinkedHashMap<Integer, ConferenceModel> getConferenceList() {
        return this.conferenceList;
    }

    public String getLastError() {
        return lastError;
    }


    @Override
    public void retrievedConferenceList(LinkedHashMap<Integer, ConferenceModel> conferenceList, String errorMsg) {
        Log.d(mod, "retrievedConferenceList()");
        this.conferenceList = conferenceList;
        this.lastError = errorMsg;
        this.sendMessage();
    }

    @Override
    public void retrievedCachedConferenceList(LinkedHashMap<Integer, ConferenceModel> conferenceList, String errorMsg) {
        Log.d(mod, "retrievedCachedConferenceList()");
        this.conferenceList = conferenceList;
        this.lastError = errorMsg;
        if(this.lastError != null) {
            Log.w(mod, "last error not null");
        }
        this.sendMessage();
    }

    // Broadcasts an intent that any result (succes or error) is available.
    // See also:
    // http://stackoverflow.com/questions/3947641
    // and for destroying, use onPause():
    // http://stackoverflow.com/questions/8802157
    private void sendMessage() {
        Log.d(mod, "Broadcasting message");
        Intent intent = new Intent("SERVICE_HANDLER_RESULT");
        // You can also include some extra data.
        intent.putExtra("message", "This is my message!");
        LocalBroadcastManager.getInstance(context).sendBroadcast(intent);
    }

}

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