ConnectivityReceiver.java

package at.tugraz.examreminder.service;

import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.preference.PreferenceManager;
import android.util.Log;
import com.commonsware.cwac.wakeful.WakefulIntentService;

public class ConnectivityReceiver extends BroadcastReceiver {
	public static final String TAG = "ConnectivityReceiver";

	@Override
	public void onReceive(Context context, Intent intent) {

		if (!intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION))
			return;
		Log.d(TAG, "ConnectivityReceiver invoked...");

		int update_interval = Integer.parseInt(PreferenceManager.getDefaultSharedPreferences(context).getString("pref_update_frequency", "-1"));
		if(update_interval <= 0)
			return;
		Log.d(TAG, "Update check daily is enabled!");

		boolean noConnectivity = intent.getBooleanExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, false);
		if(!noConnectivity)
			return;

		ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
		NetworkInfo netInfo = cm.getActiveNetworkInfo();

		// only when connected or while connecting...
		if (netInfo != null && netInfo.isConnectedOrConnecting()) {
			boolean updateOnlyOnWifi = PreferenceManager.getDefaultSharedPreferences(context).getBoolean("pref_update_wifi_only", false);

			// if we have mobile or wifi connectivity...
			if (((netInfo.getType() == ConnectivityManager.TYPE_MOBILE) && updateOnlyOnWifi == false)
					|| (netInfo.getType() == ConnectivityManager.TYPE_WIFI)) {
				Log.d("ConnectivityReceiver", "We have internet, start update check and disable receiver!");

				// Start service with wakelock by using WakefulIntentService
				Intent backgroundIntent = new Intent(context, UpdateService.class);
				WakefulIntentService.sendWakefulWork(context, backgroundIntent);

				// disable receiver after we started the service
				disableReceiver(context);
			}
		}

	}

	/**
	 * Enables ConnectivityReceiver
	 *
	 * @param context
	 */
	public static void enableReceiver(Context context) {
		ComponentName component = new ComponentName(context, ConnectivityReceiver.class);

		context.getPackageManager().setComponentEnabledSetting(component,
				PackageManager.COMPONENT_ENABLED_STATE_ENABLED, PackageManager.DONT_KILL_APP);
	}

	/**
	 * Disables ConnectivityReceiver
	 *
	 * @param context
	 */
	public static void disableReceiver(Context context) {
		ComponentName component = new ComponentName(context, ConnectivityReceiver.class);

		context.getPackageManager().setComponentEnabledSetting(component,
				PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP);
	}

}