Last Updated: February 16, 2016

How to create google chrome extension in 3 simple steps?

Description: In this post I'm gonna show you 3 simple steps to create your own google chrome extension.You can simply follow the steps with tips and note listed in between the post.

So lets get started.

Step 1: Create a folder namely('chrome_extension_demo') with 4 files in it index.html, main.js, manifest.json & extension.css.

Step 2: Lets add code into above files.
Tip: you can simply open the folder in any editor like(Sublime or Notepad++ for ease to write code)

  • index.html(contains our basic html code with few buttons on it)

 <title>Code2Concept extension demo</title>
 <script src="main.js"></script>
 <link rel="stylesheet" type="text/css" href="extension.css">
<body background="bg.png">
 <h1 align="center" id="code2concept"><a href=""><font color="white">Code2Concept</font></a></h1>
  <div class="buttonContainer">
    <button id="home" class="button">Home</button>
   <div >
    <button id="twitter" class="button">Twitter</button>
    <button id="my_linkedin" class="button">My LinkedIn</button>
    <button id="stackoverflow" class="button">Stackoverflow</button>
  <h5> <font color="white">This is the demo to create google chrome extension.</font></h5>

  • manifest.json(simple json file which is needed by chrome to add extension)
  "manifest_version": 2,

  "name": "Code2Concept extension demo",
  "description": "This is the Code2Concept extension to demostrate chrome extension",
  "version": "1.0",

  "scripts": ["main.js"]
  "browser_action": {
   "default_icon": "icon.png",
   "default_popup": "index.html"
  "permissions": [

  • main.js(javascript code to add listener to our buttons)
document.addEventListener('DOMContentLoaded', function() {

  var home = document.getElementById('home');
  home.addEventListener('click', function() { 
  }, false);

  var twitter = document.getElementById('twitter');
  twitter.addEventListener('click', function(){
  }, false)

  var stackoverflow = document.getElementById('stackoverflow');
  stackoverflow.addEventListener('click', function(){
  }, false)

//my linkedIn public dir.
  var my_linkedin = document.getElementById('my_linkedin');
  my_linkedin.addEventListener('click', function(){
  }, false)

  //open url function in new tab
  function openUrl(newURL) {
    chrome.tabs.create({ url: newURL});

}, false);

  • extension.css(css for buttons)
.button {
 border: 1px solid #13cbbb;
    border-radius: 3px;
    color: #FFFFFF;
    display: inline-block;
    float: center;
    font-size: 12px;
    margin-right: 3.2%;
    background-color: #13cbbb;
    padding: 7px 4.0%;
    width: 100px;
    min-width: 100px;
    max-width: 100px;
.button:hover {
 opacity: 0.7;
.button:active {

    width: 160px;

Note: You can download bg.png from here  and  icon.png  from here and place in the folder created in step 1:

Step 3: The most important step is how to add our code in chrome browser. Open chrome settings from hamburger icon on the right of  browser. Settings --> extensions --> load unpacked extension(select your folder created instep 1) --> fig.1

Chrome extension code2concept

Finally you'll see the your extension add to the chrome as shown in fig.2.
Chrome extension

  • If you find some issue implementing simply download and follow step 3.

  • To upload on chrome web store go here since we have developed this into developer mode.

Bingo!!! you have created your first chrome extension successfully.

Last Updated: February 09, 2016

Tips & Tricks android developer should know - part 1

Description: In this post I'm gonna demonstrate and show you some tips and tricks which really gonna help to solve some common problems while app development & help increase the speed as well.

So lets get started :-)

1. How to run app on phone without USB cord.(need USB initially to make connection)

Step 1: Connect the device with cord into your system. Ensure that USB debugging is enabled from Developer options. Open cmd(windows) or Terminal(linux) run the command. You'll find the connected device.
adb kill-server && adb devices
Step 2: Run the next command to restart in tcp mode on port 5555
adb tcpip 5555
Step 3: Now disconnect your device from system and note down your ip address of the phone from Setting > About Phone > Status. It could be something like address) Now the run the final command by replacing with your ip address
adb connect
Bingo we're done now your devices is connected and you can run it wirelessly :-)

2. How to find SHA1 key from android studio?

SHA1 key is needed in many different app containing maps or social sites authentication or using any google apis and services.Its super usefull. So the simplest way to get that is using android studio.

Step 1: Select the Gradle projects from the right pane and expand Tasks > android > signingReport. (fig.1).

Note: If you do not find your project in Gradle projects sync the project from android studio.

Gradle Project
Thats it you'll see the SHA1 for our project all the listed at once. Really awesome.

3. Best way to create icons for android app using vector asset.

Many a times in our development we need icons for small things with varied color or shape. Using Vector Asset in android studio we can create our icons with super ease.

Step 1: Right click on app > New > Vector Asset you'll see fig.3. You can choose Material Icons which contains whole lot of icons in different categories.This will create <vector> for the icon  you have selected. (fig.4) in drawable folder

Vector Asset
Vector Asset for the icon
Vector xml

Step 2: Awesome now just we can simply set to background or src of ImageView and other widgets.

Do checkout how to restore deleted app icons on JoyOfAndroid

Thus just applying some simple tricks and tips really make a difference in the speed of development.

For more updates follow us on -  Twitter