How to Solve No matching client found Error in Android Studio

By | November 23, 2016

No matching client found Error usually comes when you are using the FireBase SDK in your project. This is because you are missing the the ‘google-services.json’ file in your project. You may have added it, but in the wrong path. Android Studio will try to search for it in the ‘app’ directory. The Solution is… Read More »

onRequestPermissionsResult not called on Fragments in Android

By | October 12, 2016

This is a common mistake that people make when coding for marshmallow. When in AppCompatActivity, you should use ActivityCompat.requestPermissions; When in android.support.v4.app.Fragment, you should use simply requestPermissions (this is an instance method of android.support.v4.app.Fragment) If you call ActivityCompat.requestPermissions in a fragment, the onRequestPermissionsResult callback is called on the activity and not the fragment. If you… Read More »

Error Handling in Swift

By | October 1, 2016

When calling a method that may cause a failure, you normally pass it with an NSError object (as a pointer). If there is an error, the object will be set with the corresponding error. You then check if the error object is nil or not and respond to the error accordingly. That’s how you handle… Read More »

Google introduces ‘Reviews from the web’; will show it in search

By | September 9, 2016

Google has announced ‘Review from the web’ feature for businesses, which will show user-generated reviews, along with reviews by critics directly in the search results. According to a blog post, Google will be adding this “Reviews from the web” to local Knowledge Panels, in addition to the “best-of lists and critic reviews features.” Google’s post… Read More »

Create PDF in iOS

By | September 7, 2016

The UIKit framework provides a set of functions for generating PDF content using native drawing code. These functions let you create a graphics context that targets a PDF file or PDF data object. You can then create one or more PDF pages and draw into those pages using the same UIKit and Core Graphics drawing… Read More »

Custom SeekBar in Android With Labels in Bottom.

By | August 9, 2016

In this article I will be making a SeekBar as shown in the below screenshot. CustomSeekBar Class We will create a custom class for creating the custom Seekbar. I named it “CustomSeekBar.java” Usage Here is the layout. This is how you use it in your Activity. You are adding the CustomSeekbar to a LinearLayout. So… Read More »

Custom TableView in iOS Swift

By | August 6, 2016

In this post we will see how we can create custom tableview cells in Swift. Let’s Start… Create a new project and name it the way you like. For creating Custom TableView we have to do below things 1. Drag a tableview and Drag a UITableView Cell into it. 2. For our example – Drag… Read More »

Apple MapKit – Loading Maps, Finding User Location, Searching for a Location, Adding Annotation, Interacting with Annotations, Drawing Lines in Maps, Adding Circle, Showing Route between two locations.

By | July 25, 2016

In this demo we will be doing the following things using Apple MapKit and Google Maps API. Load Maps Add Annotation Search for a Location Decode an Address Find route between locations For starting we will add a MapView to the Storyboard and hook it to a variable named mapView. You can simply run the… Read More »

In-App Purchase in iOS

By | July 20, 2016

In-App purchase is a way of selling digital content from inside the apps. This helps the app developers to sell their apps for free and monetize the app in a clean and efficient way. In-App purchase has been a major source of revenue for Apple and Developers almost similar to Paid Apps. Below are the… Read More »

ListView/GridView with timer in Android.

By | July 18, 2016

Here is a simple example implementing ListView with timer in each row. Model Class for row We have a simple model class for each row in the ListView. Item.java Layout for the Listview row Now we have the cell.xml which is the layout for each row. Layout for the Activity activity_main.xml GridAdapter Here goes our… Read More »

Analysing, Inspecting and Generating Code Reports using SonarQube in Android Studio

By | July 1, 2016

SonarQube, formerly known as Sonar, is a platform to analyze code quality. Installing SonarQube Go to http://www.sonarqube.org/downloads/ and download the latest release. Unzip the archive to the directory of your choice. Starting SonarQube Go to your downloaded SonarQube. Open bin/[folder corresponding to your OS] Open up a terminal window and navigate to bin/[folder corresponding to… Read More »

What are optionals in Swift ( ? && ! ).

By | June 30, 2016

Swift introduces Optionals type, which handles the absence of a value. Optionals say if there are set a value, then take that value, it can be of any type AND else it is nil. Basically It has two possible values, None and Some(T), where T is an associated value of the correct data type available… Read More »

CRUD Operations in SQLite using SQLiteOpenHelper – Android

By | June 26, 2016

We do SQLite operations in Android by extending the SQLiteOpenHelper Class. I will create an Employee table with three fields id name company. I have a model class same as the database table Employee. Employee.java Lets see How we can do the CRUD (Create, Read, Update and Delete) Operations. CREATE We create a class that… Read More »

Geofencing in Android, A Simple Example.

By | June 20, 2016

What is Geofencing? Geo-fencing is a feature in a software program that uses the global positioning system (GPS) or radio frequency identification (RFID) to define geographical boundaries. A geofence is a virtual barrier. Today we will discuss how we can implement Geofencing in Android with a single location. First You need to provide the permissions… Read More »

Ionic Commands for building and Publishing Hybrid Mobile Apps

By | June 10, 2016

1. Desktop browser testing Testing your app in a browser is as simple as running the serve command in your project’s root folder. 2. Simulator testing You can also test right in the simulator using the cordova commands from the previous chapter. For example, to test in the iOS simulator, run: Substitute ios with android… Read More »

Downloading Multiple files(Images etc..) in Android Simultaneously/or in Batches in Android using ThreadPoolExecutor.

By | June 10, 2016

CPUs with multiple cores have almost become the standard in Android devices. This means multiple operations doesn’t have to wait to be executed on a single thread. They can rather run on multiple threads in parallel where each threads gets executed on a single processor. For example imagine an operation where multiple images have to… Read More »

Custom Loaders with SQLite in Android

By | June 1, 2016

Introduced in Android 3.0, loaders make it easy to asynchronously load data in an activity or fragment. Loaders have these characteristics: They are available to every Activity and Fragment. They provide asynchronous loading of data. They monitor the source of their data and deliver new results when the content changes. They automatically reconnect to the… Read More »

Using Loaders in Android Using SimpleCursorAdapter in Android.

By | May 20, 2016

Introduced in Android 3.0, loaders make it easy to asynchronously load data in an activity or fragment. Loaders have these characteristics: They are available to every Activity and Fragment. They provide asynchronous loading of data. They monitor the source of their data and deliver new results when the content changes. They automatically reconnect to the… Read More »

Filtering a RecyclerView with Custom Objects.

By | May 13, 2016

This demo will show you how you can filter a RecyclerView with your Custom Objects. If you are new to RecyclerView, then please go through this post to get a glance. Check out the Demo Video ( 7 seconds) Here I am using a CustomClass called “ListItem” which has three members. ListItem.java MainActivity.java We have… Read More »