Do we need knowledge of Angular.js, Node.js for Android Applications Development?

Answer by Upasana Sharma:

Android development, or basically any kind of mobile development will involve the client end coding.

In case of Android, if you are planning to develop the app in native language of Android SDK, you will have to learn/work in Java.

If you are planning to develop the app using hybrid platforms like Phonegap, Titanium, etc you will have to work with HTML/CSS/JS. You can use AngularJS to give your app an MVC structure.

If your app intends to connect to your server to get/post some data, the server side APIs will need to be created separately. This could be any server side language, Java/JSP, ASP.NET ,  PHP or Node.JS, etc

If you plan to work with Node.JS to create the server side APIs, over there too AngularJS might be used depending on your server side application architecture.

Hence for starting with Android development, you do not need to learn Node.JS/AngularJS. It depends on which track you are focusing on.

Do we need knowledge of Angular.js, Node.js for Android Applications Development?

importing mysql data dump via command line

Recently we had to import a db dump (.sql) file of size 346MB.

Yes there are tweaks to do the same via phpmyadmin to increase post limit, timeout time, upload size etc.

However doing it command line seemed like a better option

Here is the command to import the database

mysql -u your_user -p your_db_name < sql_filename.sql

This works irrespective of the dump size.

Cheers to command line!

How can we reset the autoincrement value of primary key in a mysql table

Now while testing we keep on adding rows to tables. But once we need to put in some real data, the primary key index is no longer the initial value like an empty table.
Suppose we did 30 test entries. Even if we delete them, the next items being added start from index 31.

Here is the fix to make it start from 1 again.


We can actually set it to any value we require.

Hope it helps. Cheers!

Change wpadminbar (top bar) color of wordpress admin panel

So here is how we can change the wordpress adminbar (top bar color).

We need to add the following to functions.php. I added them to the end of the file.

add_action('wp_head', 'change_bar_color');
add_action('admin_head', 'change_bar_color');
function change_bar_color() {

Source : Link

Android emulator – switch to landscape mode

    ctrl+fn+F11 on Mac to change the landscape to portrait and vice versa.
    left-ctrl+F11on Windows 7.
    ctrl+F11on Linux.

For Mac users, you only need to use the fn key if the setting “Use all F1, F2 etc. keys as function keys” (under System Preferences -> Keyboard) is checked.

left-ctrl+F11on Windows 7 It works fine in Windows 7 for android emulator to change the landscape orientation to portrait and vice versa.

This just saved my day!

Source : Stackoverflow

Solution : Cordova Jquery Ajax calls not working @Android4.x

On Cordova 5.x , for the android platform a plain ajax call does not work

It does not give any detailed error

readystate: 0
status : 0
errortext : error



Things are changing.

After doing research on the issue and trying out different options, I came across this.

1. You need to install the cordova whitelist plugin (this is not available for ios currently though)

cordova plugin add cordova-plugin-whitelist

2. In config.xml


in place of the old, tag.

And bam, all the ajax calls are working properly.

Note: You will need to add the following to your html files in the section.

<meta http-equiv="Content-Security-Policy" content="default-src *; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline' 'unsafe-eval'"/>

else you will get the following error message while running the app.

“No Content-Security-Policy meta tag found. Please add one when using the cordova-plugin-whitelist plugin.”

Hope it helps somebody facing similar issues.

Diving into Angular JS – Installation Windows 8

So this time its Angular JS, something new I am trying to learn

The current instructions are for installing angularJS on Windows 8/8.1 platform (may also work on windows 7, however not tested)

Dependencies Installation :
I had some of the dependecies already installed like Git, Java, Node.JS.

We will be using Grunt as our build system. For installing Grunt :

npm install -g grunt-cli

We will be using Bower to manage client-side packages for the docs. For installing Bower :

npm install -g bower


Then I forked the github account at


Building AngularJS

To build AngularJS, you clone the source code repository and use Grunt to generate the non-minified and minified AngularJS files:

Open command prompt with administrator privileges (right click, run as Administrator)(Note: This is because grunt package creates some symbolic links)

# Clone your Github repository:
git clone "<your-github-username./angular.js.git"

# Go to the AngularJS directory:
cd angular.js

# Add the main AngularJS repository as an upstream remote to your repository:
git remote add upstream ""

# Install node.js dependencies:
npm install

# Install bower components:
bower install

# Build AngularJS:
grunt package



Link Php of XAMPP to system default (Ubuntu)

We use XAMPP, however the php installation location of XAMPP is separate from what is used when php is installed via command line.
After a full clean up of the installation,

We tried to link up Php in XAMPP to be used as system default, ie like the default php, from terminal php command will execute the xampp version of php.. and we don’t have to write the full path everytime we use php from command line!

The first command we executed was

sudo ln -s /opt/lamp/bin/php /usr/bin/php

However after this even, the changes were not reflected via terminal

Then we did some changes in the bash.

gedit ~/.bashrc

Appended the following to the last line

export PATH=/opt/lampp/bin:$PATH

and saved the file and exited.

Now when we do echo $PATH in the terminal, we see that /opt/lampp/bin has been included.

Now we do a php -v from command line. And woah PHP runs properly! The version currently in our xammp installation is 5.6.


Note: We are using Ubuntu 12.04 LTS