₦airaland Forum

My Best Moment: is working hard to develop this Practical Mathematics App for Nigerian Students free with some great inputs from fellow Nairalanders - https://play.google.com/store/apps/details?id=com.chidi.elearning&hl=en

Worst Moment: I have no memories about worst moment

A practical mathematics application that will help you learn everything you need in maths. You can read the details on this post in Nairaland https://www.nairaland.com/1544093/please-download-review-practical-mathematics

To download it in the Google app store use this link.

Name : Practical Mathematics

Google Play Link: https://play.google.com/store/apps/details?id=com.chidi.elearning&hl=en

Please help me and review my new app. It is now on Google Play.

Name : Practical Mathematics

Google Play Link: https://play.google.com/store/apps/details?id=com.chidi.elearning&hl=en

Thanks

[quote author= d citizen]Hi, nollyl, i am very impressed with ur project. I will like to find from you if u are using the android studio sdk to develop ur e-learning android app. Need ur response, pls. Thanks[/quote]Thanks. I use eclipse.

Check your inbox.
Thanks

Jaydee009: Nice one NollyJ. There is something I will like us to partner on. Pls reach me via johnjaydee009@gmail.com and thewhizkid009@yahoo.com. Pls include your contact phone no.

It's a big, long-term project, and if u are available, we can work together.

@GraphicsPlus, I have sent you a message

^^^ Thanks

I have been developing this android app in my free time. I will like to get some feedback on the UI (User Interface) and I will be releasing the app soon for beta testing.

It covers WAEC, NECO and JAMB Syllabuses and other high school exams.

It includes for each subject
• Tutorials and Lectures
• Important Formulas
• Practicals and Experiments
• Past Exam Questions
• Subject Dictionary
• Subject Quiz

Please help me and review my new app. It is now on Google Play.

Name : Practical Mathematics

Google Play Link: https://play.google.com/store/apps/details?id=com.chidi.elearning&hl=en



The screenshot is shown below.

https://toscanyacademy.com/blog/download/myandroid.png

nollyj: I haven't seen people quarrel or fight in public for many years now in Sweden. Everything seems so organize and most people behave like humans but I do miss some of the actions in naija environment (A conductor dragging you to enter his bus, people fighting for no reason, people pushing their ideas in hot debate when they can't back it up with proof ) that makes me laugh.

EBK2: This is very funny. I will like to see a conductor drag someone (not me o) to his bus.
About people pushing their ideas in hot debate when they can't back it up with proof, lots of it on NL. lol

I can't forget one event that always make me laugh while still in naija. I was standing by the road side with my friend. A guy with his girlfriend was arguing over the guy being unfaithful. She told the guy she wants to end their relationship. While still on it (the guy was apologizing with some hand gesture), another guy who was passing-by mistakenly push the guy by the side while he was making way for an okada rider overtaking a moving car.

The guy that was apologizing to his girlfriend rushed the guy that pushed him and gave him a dirty slap (transfer of aggression), ... meeeeeem, see fight.


I miss these kind of open shows in naija. Everything here is on stage (acting) but in naija you will see it life and direct without paying for ticket

I haven't seen people quarrel or fight in public for many years now in Sweden. Everything seems so organize and most people behave like humans but I do miss some of the actions in naija environment (A conductor dragging you to enter his bus, people fighting for no reason, people pushing their ideas in hot debate when they can't back it up with proof ) that makes me laugh.

^^^
There is no where in the world that a fixed minimum price for web design exist so Nigeria is no exception. I agree with Dual Core - A student who is try to get a web project during ASUU strike to see if he / she can raise a little money will never care about a fixed price. Moreover, many beginners without portfolio who can't compete with established web design companies in Nigeria on a fixed price can charge any amount to first build up a portfolio

@Tolustar, nice work.
Where do you get all these images you are using and are they free to use for commercial purposes?

Thanks

Kennyinusa: @OP(nollyj), i need to talk to u, please its urgent.
Mail me @popularity2you@gmail.com

Check your inbox

Ajibel: Yup, that is my bf. I don't want to post my contact publicly. You can ask him and he'd give u my FB I'd. He'd be offended if I post my details

1 million Likes

BetaQuick: Instead you must know how many bytes to read from the Socket's InputStream. This can be done by either the server telling how many bytes it is sending, or by looking for a special end-of-data character.

Thanks once again. If you look at my first post, using this method call gets the amount of bytes the server is excepting from the client.

int bSize = clientSocket.getReceiveBufferSize(); This returns 8192 when you print out bSize;

Since the client is send less than 8192 bytes, the BufferedInputStream read action keep waiting (Blocking) for the client to complete this amount.

1. I observed that when I close the connection it automatically flushes out the stream but I am using the connection for multiple read so it will be open until I choose to close it.

2. That is why I mentioned that I used timeout socket method since I know that the client have finish reading the bytes from server irrespective of the fact that it still waits for more bytes that the client does not have.

I think I have to try JAVA NIO in Java 7 API since it has non-blocking read functionality.

Thanks for your help

BetaQuick: You are trying to read greater than whats in the buffered input stream.

Why dont you try a bytearrayoutputstream. See below

// output bucket to read data
ByteArrayOutputStream os = new ByteArrayOutputStream();
// read the response data
InputStream in = new BufferedInputStream(conn.getInputStream());

int read = 0; byte[] data = new byte[1024];
while((read = in.read(data)) > 0) {
os.write(data, 0, read);
}

// Your data is now in the ByteArrayOutputStream for reading

Thanks, but it still gives the same problem since the blocking occurs here in.read(data)

I wrote a client server application that list all the files in the server and can download any file in the server with a command. Everything seems to be working well but I am having a problem with downloading files to the client due to read blocking.

Problem case

When the client request to download a file in the server, the server send the content of the file in bytes.
The client will start to read the received byte into a buffer and the size of the buffer is 8192 which I got from int bSize = clientSocket.getReceiveBufferSize();

Since the buffer size from the server is less than that of client, the client blocks after reading the bytes from the server since it is still waiting for more and the server has less.

Server Code

private static void DownloadFileFromServer(BufferedInputStream bis, String filePath){
		 	
		
		try {
			stream = new FileOutputStream(pathtoClientDirectory + filePath);
		} catch (FileNotFoundException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}
		
			try {				
					int bSize = clientSocket.getReceiveBufferSize();
					 int nRead;
					 byte[] data = new byte[bSize];
										 
				    	try {
							while ((nRead = bis.read(data, 0, data.length)) != -1) {
								 stream.write(data, 0, nRead);

								 try {
									   clientSocket.setSoTimeout(100);
									} catch (SocketException e) {
										// TODO Auto-generated catch block
										e.printStackTrace();
									}
							            }
						} catch (IOException e) {
							// TODO Auto-generated catch block
							e.printStackTrace();
						}
				    				

			} catch (SocketException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}

	 }

Server Code

	private static void sendFileToClient(String filename){
	
			try{
				 File myFile = new File(pathtofileDirectory + filename);			 
				 
				 
				 byte[] mybytearray = new byte[(int) myFile.length()];
				 
				 System.out.println("Length of file to read" + mybytearray.length);
				
				 FileInputStream ips = new FileInputStream(myFile);
				 BufferedInputStream biss = new BufferedInputStream(ips);			 	 
				 int nRead;			  
				
				
				 while ((nRead = biss.read(mybytearray, 0, mybytearray.length)) != -1) {
					 
					 buffersp.write(mybytearray, 0, nRead);	
					 buffersp.flush();
				 }
				 biss.close();
				//buffersp.close();  
				
			}catch(IOException ex){
				System.out.println(ex.getMessage());
		}

I have used the socket setTimeout which works but it always throws Java socket exception. I have also tried using separate thread for each server connection but it did not know for me. I need suggestion or point on how best to solve this.

Thanks

Thanks for download and helping out for testing, If you experience any issue kindly let me know.

BetaQuick: Ok I got it. I downloaded the app.

BetaQuick: I can't find the app yet on google play store. The link does not work for me yet. I guess it hasnt fully propagated through all the servers.
I will try again later.

Interesting observation on the download count. Are you doing any marketing to get the downloads?

Thanks for your interest. you can search for toscanytech to see the list of all the apps I published. Then you can select it from the list.

Please let me know how it goes for you.

I wrote this code now based on your request. Please not that it is not tested but if you run into problem just paste it here. I will try as much as possible to help.

I made two simple classes in Php. One is for database connection and the other to query database.

<?php
include_once 'blog/config.php';

class DbConnect{
	
	
	private $connect;
	
	
	public function __construct(){
		
		$this->connect = mysqli_connect(DB_HOST, DB_USER, DB_PASSWORD, DB_NAME);
		 
		if (mysqli_connect_errno($this->connect))
		{
			echo "Failed to connect to MySQL: " . mysqli_connect_error();  
		}
	}
	
	public function getDb(){
		
		return $this->connect;
	}
	
}

?>

Second Class to query database user table

<?php

include_once 'db.php';


class DatabaseLayer{

private $tables;

public function __constructor(){

$this->tables = "User_table";
}


public function createAccount($username, $password, $email){

// database clase
$com = new DbConnect();

$notiify = "";

// filter inputs
$username = filter_var($username, FILTER_SANITIZE_STRING);
$password = filter_var($password, FILTER_SANITIZE_STRING);
$email = filter_var($email, FILTER_VALIDATE_EMAIL);


$error_array = array();

// check varliable after sanitazation
if(!$username){
$error_array[] = "Invalid Username";
}

if(!$password){
$error_array[] = "Invalid Password";
}

if(!$email){
$error_array[] = "Invalid Email";
}

// check if username or email has been used by another user
$is_used = $this->checkEmailUsernameExist($username, $email);

if(!$is_used){

$error_array[] = "Username and or email address has been taken. Please change to a new one";
}


if(!is_null($error_array)){

// encrypt your password with whatever method you like . I use md5 without salt

$password = md5($password);

// insert into the user table
$sql = "INSERT INTO " . $this->tables . " (username, password, email) VALUES ( '$username', '$password', '$email')";

$inserted = mysqli_query($com->getDb(), $sql);

if($inserted == 1){

$notiify = "Your Registration is successful";
}
else{

$notiify = "Your Registration failed. Please contact the admin";
}
}
else{

//check number of errors
$error_size = count($error_array);

for($i = 0; $i < $error_size; $i++){

$notiify .= $error_size[$i] . "\n";
}
}

// close database connection
if(!is_null($com)){

mysqli_close($com->getDb());
}

return $notiify;
}

// check if username or password has been used before
private function checkEmailUsernameExist($username, $email){

$com = new DbConnect();

$is_email_username_exist = false;

$sql = "SELECT * FROM " . $this->tables . " where username = '$username' OR password = '$password";
$result = mysqli_query($com->getDb(), $sql);

if(mysqli_num_rows($result) > 0){

$is_email_username_exist = true;
}

// close database connection
if(!is_null($com)){

mysqli_close($com->getDb());
}

return $is_email_username_exist;
}

?>


How to use this code.

1. Create your user_table in your database with fields username, password, email and others

2. Add your database connection details in a config.php file as a Constants using the following constant names - DB_HOST, DB_USER, DB_PASSWORD, DB_NAME


3 When a user submit the registration form. Then get the values in the post or get array variable like this

 
     
     if(isset($_POST['submit'])){

     $username = $_POST['username'];
     $password = $_POST['password'];
     $email = $_POST['email'];

    
     // include the com.php file
     include_once 'com.php'     

    // create an object of the DatabaseLayer class
    $db_layer = new DatabaseLayer();

   // call the create new user method

    $db_layer->createAccount($username, $password, $email)
}

Please see if you can understand the code and try to fix any error before asking more questions. It will help in your learning process.

What I have observed in less than one month is that if you want many downloads don't focus your app to Nigerian users. Make it universal. Out of 342 total installs in my apps, Nigerian users account for only 5.

I have also taken time to exam other apps in Google play that focus on Nigeria, many of them still have little download counts. I might not be right but this is the trend I found so far.

Download Statistics So Far

My first and second apps were uploaded to the Google Play Store on 17th September while the last was just today. The download stats so far.

Thesis Topic Suggestions - 302 Active Install

African Celebrity Photo Quiz - 36 Active Install

Call Flasher - [b](Uploaded Today) - 4 Active Install



I am not much concerned now by the download counts. I am happy that these apps have let me dig into native android programming and I am not sure if I will be looking back any time soon.

The Google play link for me Call Flasher android app is now available. I did test it on my phone only. Now I will like you to also help me test it on your phone.

This is link on the Google play store https://play.google.com/store/apps/details?id=com.toscanyacademy.callflasher.

You can also search it with it's name - Call Flasher

Thanks for helping out

It is nice to travel and acquire a new knowledge. You are come back to share it with your people.

Welcome Back

seunlayi: I belive this going to help our developers.

Sometimes it is hard to see a collection of Nigerian app. I hope we can get to know about some Nigerian apps we haven't heard before

Uyi Iredia: I only have the constitution of Nigeria and I recommend it ,

Yes, Nigerian Constitution is also a very good app

The post is for us to share 5 Nigerian Made Android App on your phone rightly now. It will help all of us to discover made in Nigerian apps. You can also rate each app you listed.

1.Nigerian Recipes
Looking for Nigerian Recipes? Want to learn how to cook Nigerian Food? Learn how to cook Nigerian recipes in all food courses- Cooking Techniques for Beginner and Intermediate Cooks.
Learn the basic techniques of cooking including: Agidi or Eko, Moi Moi, Pounded Yam, Semolina Fufu, Garri (Eba), Tuwo Shinkafa, Groundnut Soup (Peanut Soup), Gbegiri Soup, Ogbono Soup ...

https://play.google.com/store/apps/details?id=com.a119610334451b903824300d6a.a49898700a


2. Keke On The Run - Game
Keke On The Run is a fun and highly addictive driving game in Which the goal is to avoid other vehicles and collect Fuel Cans That Increase your score. The faster you complete the level, the higher your bonus ice.

https://play.google.com/store/apps/details?id=com.Breezinstein.Keke_otr_free&hl=sv


3.African Celebrity Photo Quiz
African Celebrity Photo Quiz is an applicationthat test users' knowledge about African celebrities. The celebrities are categorized into different categories and each category represents a level in the application.

https://play.google.com/store/apps/details?id=com.Breezinstein.Keke_otr_free&hl=sv


4. iROKOtv
The iROKOtv Android mobile app is the premiere FREE Mobile App dedicated full length Nigerian movies popularly called Nollywood. Welcome to the Best of Nollywood and African movies. All movies streamed in HD quality on your Android device. The app has Nollywood movies iROKOtv.

https://play.google.com/store/apps/details?id=com.irokotv&hl=sv


5. Thesis Topic Suggestions
Thesis Topic Suggestions is a collection of many Thesis / Dissertation Topics for students planning to start Their final certificate or degree projects who are not yet DECIDED on a topic For their dissertation.

https://play.google.com/store/apps/details?id=com.toscanyacademy.thesistopic&hl=sv

Let's see Nigerian apps you have on your mobile phone right now

talk2hb1: If(IQ is directionally proportional to programming. && Programming is directly proportional to IQ) Then
If(<IQ) Then
I need to increase my programming.
EndIf
EndIf
Hello World!!!!
Good Bye World!!!

Did you know that your website link on your signature has been hacked or is it intentional?

BetaQuick: Great stuff, where can we get the app to test?

I will provide the link today. Thanks for your interest.

I have almost done with my app and this is what the app is all about.

Call Flasher

1. Flash any number automatically. You don't have to worry about your call credit anytime you flash a number.
2. Access and filter phone numbers from from phone records
3. Add and flash a number that is not in your call record
4. Queue phone numbers you wish to call in the future with a timer
5. Automatically hide your caller Id during flashing

The screen shot is below

https://toscanyacademy.com/blog/download/mapp.png

I still have one bug that I am trying to fix. My phones runs on android 4.0 so I will like you guys with other version of android to test the app for me.