I am making one task widget application.

This is a simple widget application which can be used to add new tasks by clicking on "+New Task". So ideally what I have done is, I've added a widget first, then when we click on "+New Task" a new activity opens up from where we can type in a new task and it should get updated in the ListView inside the home screen widget.

Problem: Now whenever I add a new task, the ListView does not get updated. The data gets inside the database a new is created as well. My onUpdate(...) method gets called as well. There is a WidgetService.java which is a RemoteViewService that is being used to call the RemoteViewFactory but WidgetService.java gets called only when we create the widget, never after that.

WidgetService.java never gets called again.

I have the following setup

MyWidgetProvider.java AppWidgetProvider class for updating the widget and filling its remote views.

public class MyWidgetProvider extends AppWidgetProvider {

public static int randomNumber=132;
static RemoteViews remoteViews = null;

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {


    updateList(context,appWidgetManager,appWidgetIds);

}


public static void updateList(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds){


    final int N = appWidgetIds.length;

     Log.d("MyWidgetProvider", "length="+appWidgetIds.length+"");

     for (int i = 0; i<N; ++i) {
         Log.d("MyWidgetProvider", "value"+ i + "="+appWidgetIds[i]);
         // Calling updateWidgetListView(context, appWidgetIds[i]); to load the listview with data
         remoteViews = updateWidgetListView(context, appWidgetIds[i]);

         // Updating the Widget with the new data filled remoteviews
         appWidgetManager.updateAppWidget(appWidgetIds[i], remoteViews);

         appWidgetManager.notifyAppWidgetViewDataChanged(appWidgetIds[i], R.id.lv_tasks);
        }
}

private static RemoteViews updateWidgetListView(Context context, int appWidgetId) {

    Intent svcIntent = null;

    remoteViews = new RemoteViews(context.getPackageName(),R.layout.widget_demo);

    //RemoteViews Service needed to provide adapter for ListView
    svcIntent = new Intent(context, WidgetService.class);

    //passing app widget id to that RemoteViews Service
    svcIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);

    //setting a unique Uri to the intent
    //binding the data from the WidgetService to the svcIntent
    svcIntent.setData(Uri.parse(svcIntent.toUri(Intent.URI_INTENT_SCHEME)));

    //setting adapter to listview of the widget
    remoteViews.setRemoteAdapter(R.id.lv_tasks, svcIntent);

    //setting click listner on the "New Task" (TextView) of the widget
    remoteViews.setOnClickPendingIntent(R.id.tv_add_task, buildButtonPendingIntent(context));

    return remoteViews;
}

// Just to create PendingIntent, this will be broadcasted everytime textview containing "New Task" is clicked and OnReceive method of MyWidgetIntentReceiver.java will run
public static PendingIntent buildButtonPendingIntent(Context context) {
    Intent intent = new Intent();
    intent.putExtra("TASK_DONE_VALUE_VALID", false);
    intent.setAction("com.ommzi.intent.action.CLEARTASK");
    return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
}

// This method is defined here so that we can update the remoteviews from other classes as well, like we'll do it in MyWidgetIntentReceiver.java
public static void pushWidgetUpdate(Context context, RemoteViews remoteViews) {
    ComponentName myWidget = new ComponentName(context, MyWidgetProvider.class);
    AppWidgetManager manager = AppWidgetManager.getInstance(context);
    manager.updateAppWidget(myWidget, remoteViews);     
}

}

WidgetService.java A RemoteViewsService class for creating a RemoteViewsFactory.

public class WidgetService extends RemoteViewsService {

@Override
public RemoteViewsFactory onGetViewFactory(Intent intent) {
int appWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,AppWidgetManager.INVALID_APPWIDGET_ID);

return (new ListProvider(this.getApplicationContext(), intent));

}
}

ListProvider.java A RemoteViewsFactory class for filling the ListView inside the widget.

public class ListProvider implements RemoteViewsFactory {

private List<TemplateTaskData> tasks;
private Context context = null;
private int appWidgetId;
int increment=0;
public ListProvider(Context context, Intent intent) {

    this.context = context;
    appWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,AppWidgetManager.INVALID_APPWIDGET_ID);
    //appWidgetId = Integer.valueOf(intent.getData().getSchemeSpecificPart())- MyWidgetProvider.randomNumber;

    populateListItem();
}

private void populateListItem() {

    tasks = new ArrayList<TemplateTaskData>();

    com.ommzi.database.sqliteDataBase letStartDB = new com.ommzi.database.sqliteDataBase(context);
    letStartDB.open();
    tasks=letStartDB.getData();
    letStartDB.close();     
}

public int getCount() {
    return tasks.size();
}

public long getItemId(int position) {
    return position;
}

public RemoteViews getViewAt(int position) {



        // We are only showing the text view field here as there is limitation on using Checkbox within the widget
        // We prefer to on an activity for the user to make comprehensive changes as changes inside the widget is always limited.
        // To view the supported list of views for the widget you can visit http://developer.android.com/guide/topics/appwidgets/index.html
        final RemoteViews remoteView = new RemoteViews(context.getPackageName(), R.layout.screen_wcitem);

        TemplateTaskData taskDTO = tasks.get(position);

        Log.d("My ListProvider", "1");

        remoteView.setTextViewText(R.id.wc_add_task, taskDTO.getTaskName());
        if(taskDTO.getTaskDone()){
            remoteView.setImageViewResource(R.id.imageView1, R.drawable.checked);
        }else{
            remoteView.setImageViewResource(R.id.imageView1, R.drawable.unchecked);             
        }

        Intent intent = new Intent();
        intent.setAction("com.ommzi.intent.action.GETTASK");
        intent.putExtra("TASK_DONE_VALUE_VALID", true);
        intent.putExtra("ROWID", taskDTO.getRowId());
        intent.putExtra("TASK_NAME", taskDTO.getTaskName());
        intent.putExtra("TASK_DONE_VALUE", taskDTO.getTaskDone());



        remoteView.setOnClickPendingIntent(R.id.imageView1, PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT));



        Log.d("My ListProvider, Inside getView", "Value of Incrementor=" + increment +
                                                 "\n ROWID=" + taskDTO.getRowId() +
                                                 "\n TASK_NAME=" + taskDTO.getTaskName() +
                                                 "\n TASK_DONE_VALUE=" +taskDTO.getTaskDone() +
                                                 "\n Total Database Size=" + tasks.size());

        return remoteView;
}

public RemoteViews getLoadingView() {
    // TODO Auto-generated method stub
    return null;
}

public int getViewTypeCount() {
    // TODO Auto-generated method stub
    return 1;
}

public boolean hasStableIds() {
    // TODO Auto-generated method stub
    return false;
}

public void onCreate() {
    // TODO Auto-generated method stub

}

public void onDataSetChanged() {
    // TODO Auto-generated method stub

}

public void onDestroy() {
    // TODO Auto-generated method stub

}

}

GetTaskActivity.java This is another activity that is fired from a BroadcastReceiver(MyWidgetIntentReceiver.java). Purpose of this is to get a new task added to the list of task.

MyWidgetIntentReceiver.java BroadcastReceiver fired using a pending intent that starts an activity GetTaskActivity.java.

Please help me out with this problem. I am seen all the posts here and on other websites no body is having any solution. But I am sure a solution exist to this.

Thanks for your help!