STWidgetProvider.java

package fr.tvbarthel.apps.simplethermometer.widget;

import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;

import fr.tvbarthel.apps.simplethermometer.services.TemperatureUpdaterService;
import fr.tvbarthel.apps.simplethermometer.utils.ConnectivityUtils;
import fr.tvbarthel.apps.simplethermometer.utils.PreferenceUtils;

/**
 * An {@link android.appwidget.AppWidgetProvider} used to update the
 * Simple Thermometer Widgets
 */
public class STWidgetProvider extends AppWidgetProvider {

    //An intent Action used to notify a data change: text color, temperature value
    // temperature unit etc.
    public static final String APPWIDGET_DATA_CHANGED =
            "fr.vbarthel.apps.simplethermometer.widget.STWidgetProvider.DataChanged";

    /*
        AppWidgetProvider overrides
     */
    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        super.onUpdate(context, appWidgetManager, appWidgetIds);
        updateAppWidgets(context, appWidgetIds);
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        super.onReceive(context, intent);
        final String action = intent.getAction();
        boolean needAnUpdate = false;

        if (STWidgetProvider.APPWIDGET_DATA_CHANGED.equals(action)) {
            //if a data changed, an update is needed.
            needAnUpdate = true;
        } else if (ConnectivityManager.CONNECTIVITY_ACTION.equals(action) && ConnectivityUtils.isNetworkConnected(context)) {
            //if the temperature is outdated and there is a network connection
            //an update is needed.
            needAnUpdate = true;
        }

        if (needAnUpdate) {
            //Retrieve the Simple Thermometer Widget Ids
            final AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
            final ComponentName thisWidget = new ComponentName(context, STWidgetProvider.class);
            final int[] allWidgetIds = appWidgetManager.getAppWidgetIds(thisWidget);

            //Update the Simple Thermometer Widgets
            updateAppWidgets(context, allWidgetIds);
        }
    }

	/*
        Private Methods
	 */

    /**
     * Update the Simple Thermometer Widgets by starting a {@link fr.tvbarthel.apps.simplethermometer.widget.STWidgetUpdateService}
     *
     * @param context      context
     * @param appWidgetIds widget ids
     */
    private void updateAppWidgets(Context context, int[] appWidgetIds) {
        if (PreferenceUtils.isTemperatureOutdated(context.getApplicationContext(), false)) {
            // Need to update the temperature
            TemperatureUpdaterService.startForUpdate(context);
        } else {
            //Build an intent to start the update service
            final Intent intent = new Intent(context.getApplicationContext(), STWidgetUpdateService.class);
            intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, appWidgetIds);
            context.startService(intent);
        }

    }

}