Adding events to native calendar in PhoneGap iOS application

Introduction:
While developing a PhoneGap application, I got a new requirement to add an event to native calendar from the application. So that user can get aware of the details of the event from native calendar.

Description:
To implement the same, I goggled for while and found a nice and interesting plugin which is very easy to integrate and works with PhoneGap smoothly. It allows the user to add the event to calendar of that device. Here are the steps bellow which will guide to integrate the calendar plugin in PhoneGap iOS application.

1. Download the calendar plugin from github by using this URL.
https://github.com/EddyVerbruggen/Calendar-PhoneGap-Plugin/tree/pre-3.0
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Control asynchronous processes by multiple callbacks using Deferred

Introduction:
To control the synchronous or asynchronous flow, there may be more methods but we will do this by multiple callback mechanism using deferred and promise object.

Description:
In order to use this mechanism first we need to have an understanding of deferred and promise object.
Here we will use a promise with a deferred object.
A promise is a placeholder for a result, which is initially unknown. While a deferred represents the computation that results in the value. Every deferred has a promise, which functions as a proxy for the future result.
A promise is a value returned by an asynchronous function, but a deferred can be resolved or rejected by its caller which separates the promise from the resolver. Continue reading

Copy existing sqlite database into PhoneGap iOS application

Introduction:
Usually PhoneGap supports SQLite database to interact locally. There might be a scenario where we need to create the database freshly or sometimes need to use the existing database. The idea of writing this blog came to my mind while encountered a question in stackoverflow site.  In this blog we will focus on importing existing database into our PhoneGap application and use the same to interact with our application.

Description:
Lets have a pre-populated database having tables with data which needs to be imported to our application. It will help us to minimize our effort in creating the database freshly to the application on its startup. For this we need to follow the bellow steps.

Step 1 : Remove the .sqlite extension from the sqlite database. Ex. If we have the database called DummyDB.sqlite make it only DummyDB.
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Bubbling effect and its solution using corona SDK

Introduction :
The bubbling effect is a very common issue produced while developing cross platform mobile applications.

Bubbling Effect?? What’s that ??
Let’s assume a layout in which we have a parent box having a child box and both of them having their own click/touch event. Now if anyone clicked/touched the child box, ideally event associated with the child box should get fired. But here, along with this the event associated with its parent box will also gets fired.
Meaning on click of child box, both the events associated with child and its parent gets fired. Let’s get the solution for this issue, which is described in below screen cast.

Summary :
The above video described the bubbling effect caused in an app and the solution to handle this issue using Corona SDK.

THAT’S IT

Presented By: Raju Mahato, Software Developer, Mindfire Solutions

Integrate SQLite plugin in PhoneGap iOS application

Introduction:
For offline storage in PhoneGap application, we can use local storage or storage API. But there are some limitations of this storage mechanism. So here we will discuss on creating local database with larger storage limits with the help of SQLite plugin.

Description:
To overcome the limitations, we can use the SQLite plugin which is very easy to integrate. Here are the steps below which will guide to integrate the SQLite plugin in PhoneGap iOS application.

1. Download the SQLite plugin from github by using this url.

https://github.com/lite4cordova/Cordova-SQLitePlugin

2. The plugins are inside Cordova-SQLitePlugin / src / ios /. Let’s drag the SQLitePlugin.h and SQLitePlugin.m files into the Plugins directory in Xcode and choose the “Create folder references for any added folders” option while adding reference.
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Few tips on JavaScript – Part II

This blog is a continuation of my last posting.

Solve the pass by reference problem in JavaScript
Many of us has come across the pass by reference problem in JavaScript array. we have simply assign one array to another array and any modification in one array reflects both the arrays and we bang our head where it is got changed.

var myArray=["test","nice","great"];
var changedArray=myArray;
changedArray[1]="chnagedValue";
console.log(myArray);
console.log(changedArray);

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Few tips on JavaScript – Part I

Properties in double quotes

var myArray=["test","xyz","great"];
console.log("MyArray Length (Without Quotes)="+myArray.length);
console.log("MyArray Length (With Quotes)="+myArray["length"]);

Output
MyArray Length (Without Quotes)=3
MyArray Length (With Quotes)=3

Description
As we know that we can access Array properties by array name with dot notation. But we also can access the array properties through the array square bracket within the quote. The array operator (square brackets) is also used for accessing the array’s properties (arrays are also objects in JavaScript) .So we can access the array length property within the quotes in the array square bracket. Continue reading

Data passing in multiple screens from one activity to another using Xamarin in Android

Introduction :-
In this Article, we will see how to create multiple screens in Android using Xamarin and pass data between them.
Android applications consist of a set of loosely coupled screens, represented by Activity classes.
Since each Activity is essentially decoupled from others, there needs to be a way to launch them and optionally pass data to them. On Android this is accomplished using Intents.

Intents are the classes that describe a message, both what the desired action of the message is and a data payload to send along with it. They are commonly used within applications to launch Activities. To launch a new Activity, we create a new Intent, set the Context and the Activity class to launch and then tell the OS to handle the Intent, which launches the Activity. Continue reading

Urban Airship integration to receive Push Notification in iOS using PhoneGap

Introduction:
Push Notification is a mechanism, which allows an application to notify the user about any new events without opening the application, same as a SMS pops up on our mobile screen. Push Notification can work both in background and foreground, so this is a nice way to interact with the application in the background.

Description:
Urban Airship provides easy and effective solution to push the notification to user. It can act as as a middle layer which will help us to send the notification from our server routing it through the Apple Notification Server.
So in this blog we will discuss the use of Urban Airship to send push notification to our application. Here are the steps bellow, which will guide us in the process of integrating the Urban Airship plugin in iOS application using PhoneGap version 2.6.0.

Step #1:
Download the plugin for Urban Airship from github with this URL.

https://github.com/urbanairship/phonegap-ua-push/tree/1.0.8
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