Widget-Light-Theme-Scheduler

This library has the logic to schedule your widgets for their day or night themes. This library is agnostic about what other libraries are used in your application; although, it requires implementations to interact with your dependencies. Each of those implementation interfaces can be found at LightThemeModule. Once the module is created it is then assigned to LightThemeManager.

module = LightThemeModule.create()
    //stores sunrise and sunset. SharedPreferences can be used for it
    .applyLightTimeStorage( lightTimeStorage )
    //calls webservice or implements a sunrise/sunset generator library
    .applyLightTimeApi( sunriseSunsetApi ) 
    //returns last known location, and if app has location permissions
    .applyLocationService(  locationService ) 
    //returns networkstate if online, 
    //but can be ignored if not using online access for sunrise/sunset
    .applyNetworkService( networkService ) 
    //provides number of widgets, and saves the widget theme for day or night
    .applyWidgetService( widgetService ) 
    //optional for testing, skip in production
    .applyTestableNow( LocalTime.parse("14:00")) 
    //covers scheduling for the next sun event. 
    //It also schedules a job if device was found offline and needs to pull data
    .applyAlarmService( alarmService ); 

mLightThemeManager = new LightThemeManager( module );

Your own WidgetProvider must pass its events to LightThemeManager. Also include a BroadcastReceiver to catch when the device turns on.

    @Inject
    LightThemeManager mLightThemeManager;
    
     @Override
    public void onReceive(Context context, Intent intent) {
       mLightThemeManager.onAppEvent( intent.getAction() );
    }

public class RebootReceiver extends BroadcastReceiver {

    @Inject
    LightThemeManager mLightThemeManager;

    @Override
    public void onReceive(Context context, Intent intent) {
       if( intent.getAction().equals(Intent.ACTION_REBOOT))
            mLightThemeManager.onAppEvent( intent.getAction() );
    }
}

The library makes use of Joda Time. Feel free to apply the libraries of your choice.

Please look into the demo for more insights

Watch this short video on Youtube on how it works: