₦airaland Forum

A ladokites? Am also a Ladokite, its always nice seeing a ladokite on NL...I hope to know you bro.

0luwatope:
the prob is that I can't figure it out, I installed the app on my phone and it keeps crashing....
App has only splashscreen, main, about activity

Check your LogCat to see the exception that was thrown...This, is the only solution to your problem.

Nice one nollyj. This is really cool...
I have a suggestion, I think after guys must have learned new stuffs about Android Development, this program should end with a challenge where all eligible participants should create a full functioning Android App so as to compliment everything they've learned.

This might really make it really interesting.

Seriously, how our people think about app development is not just it. Imagine, talking about messenger, WhatsApp and the likes...do you think the only required skill is programming. And if we ask him how much he budget, I can guess what you'll say. I implore you to carry out some simple researchs on how this top apps were built, so that someone will not dupe you....

Larisoft

hardebayho:
Ah, the PC's pretty crappy.. I guess its the OS (i use kali linux, xfce).. the PC's processor is just 1.6GHZ

Android Studio works more nicely on Linux.
Let's say you are using a windows laptop, no one will tell you before you run from it.

@OP...try increasing your RAM to 2GB, then download the one bundled with the SDK to save time and energy, its very easy.

I rep LAUTECH....be expecting more from us.

vpaymoney:
Wow! Java programming. Am going for it. HTML CSS also but java first.
@lekropasky do you have any knowledge?

Yeah. Am a Java programmer. Google search - "Java, how to program by dietel" and download it, the book is great and its gonna give you partially all you need to start as an android developer. GOOD LUCK.

You'll have to learn Java first if you want to build an app that is as efficient as UBER, if you were able learn Java, then you can build an app like UBER...

Wow, interesting. I have a question, What are the limitations? Why does the native development with Android SDK is better?

Hi Android Developers. I saw this challenge today but i think its too late.
Only 10hours remaining, but they might extend it anyway.

http://www.stutern.com/challenges/connect-rail-develop-an-android-transport-monitoring-app

This is a very nice idea i must say. Its great. I really love the app. The UI is even okay, you can release the app and look into the UI later. I'm also a developer and i must confess, i'm envious of your idea.

Look into material design and redesign the UI so that some people won't be able to say rubbish about it.
GOOD JOB ONCE AGAIN.

Seriously, when i saw this thread, i thought this guy is another troll, but i changed my mind. He's knowledgeable. I am an Android Developer, i'll like to work with you. I have been learning XMPP protocol for the past months, believe me, a social network-like app like twitter can't do without this well-defined protocol.

paskieadigun001@gmail.com

-- ill be expecting your message.

Davindal:
You are a dunce! How dare you CLOWN refer to us as dumb? So because of love, things as infidelity, promiscuity, etc., should be overlooked? You are an idiot! You are the dumb one in a ramification here. So you expect a military personnel to fall victim of potential adulterous wife? So that when he embacks on long period-stretching official duty, usually 6months; the stupid wife would go on spree committing adultery? You are a bloody fool.

f.uck your asshol.e

You cant add actionbar to fragment, you'll rather add actionbar to an activity and add your fragment to that Activity. And pls try and look at ToolBar, its much more sweeter than the old actionbar, and it support material design.

Google is your friend.

You cant add actionbar to fragment, you'll rather add actionbar to an activity and add your fragment to that Activity. And pls try and look at ToolBar, its much more sweet than the old actionbar, and it support material design.

Google is your friend.

You friend is a very stupi.d/foo.lish person. No one should doubt it that he doesnt even love her right from the beginning, because if he really do love her, such stupid and unintelligent test wont make him think its over. Hes very dumb and i guess its because you are his friend, dumb guys should be friend with intelligent guy abeg. I hate dumb guys...

Raypawer:
i agree with your post, but!... even among the average's.. experts dey! i have met so many average programmers esp php that cannot undertake certain projects implementing some simple features... like i said before, some people just stick to you-tube vids and thats the end!.. they never want to pay to learn, so just want to learn programming cos of the quick cash, like i met one, a system engineer, when he saw what i created, all of a sudden wants to become a programmer and do same so he could compete with me... even among the flooded market, there are some that still get high pay as much as 650k, a friend of mine, and some gets more than a million, you see them very quiet and observant.. so let the carpenters come in, there i a place for every kind of programmer in the market, that's the beauty of it all!

You have said it all.

Oga dhtml18, i think i want to implore you to think about Fincoapps suggestion. Its the best, i think. It'll even enable beginners to learn. If we are to submit our github handle, it wont make more sense.(maybe). Many guys/programmers hardly have time for personal projects...client projects might sometimes be overwhelming - you should understand na.

Great app. I love it.

prinzfunchi:
Is it possible to connect without turning on mobile data on the android?

Yes. It's very possible. If the app you're building has rest backend, just check your machine IP address using cmd - > ipconfig. Then use your IP address to connect em together. NB: TURN ON YOUR MACHINE WI-FI AND CONNECT YOUR PHONE To it FOR BEST RESULT

Seriously, this guy is dumb. You finally clear my doubt of you being a programmer, how can someone keep ranting over what he doesnt know for Gods sake. Shit!!!. Do you think nairaland is full of novice/dummy programmers? Even, a two weeks old Java programmer knows that storing different objects in an array is not possible.
class User {
private int userID;
}
class Admin {
private int adminID;
}
User[] users = new User[2];
users[0] = new Admin();

Any real Java programmer must be very sure that the code above is not possible to implement. And here is seunthomas ranting about shit, hes not even ashame of himself. I really mean this, Go And Learn....i can help you with that if you need it.

seunthomas:
Some people will just open their mouth to sha talk sha.

Please knowledgeable Java programmer, explain this code which is an array of objects and holds different types of object:

class Test{



public static void main(String args[]){
boolean status=true;
char c='Y';
int v=100;
Object s[]=new Object[3];
s[0]=status;
s[1]=c;
s[2]=v;

System.out.println(s[0]);
System.out.println(s[1]);
System.out.println(s[2]);

}

this code will never run. YES. Because, boolean, char, int are primitive types not object, if you had written this....
Object[] s = new Object[3]
Integer number = new Integer(1);
s[0] = number; //this is correct, remember, class Integer extends Object and thats why you can store it instance inside an array of Object. Your code is rubbish, what you need to understand is that all Java classes implicitly extends an Object class which makes them an Object. You tried to assign a primitive type value to an object, its very funny, i am not even sure you know the different between 'String' and 'int'. i cant believe this is coming from somebody that tried to implement his own JVM its a SHAME. I didnt even tried this when i was a dummy in Java. Its so sad. Go and learn bro.

seunthomas:
See this man ohhh.

Were you dey when i dey work on my own personal implementation of the JVM in 2006??

Me i read the documentatations you are talking about, i also read language specifications as well as understand the concept behind stuff very well.


Anyway, like i said ignorance is a killer.

Mr only single types can be stored in a Java Array.

Seriously, this guy doesnt know anything at all about Java, and i am not even sure you know any other language, and thats the reason why you are arguing that array can hold more than one datatype/object, a new Java programmer that is learning with mind wont even say this, talkless of your 100years experience with Java. Its a pity. I dont even know why you do this, maybe because you want to nailed down some potential clients from here. Its a pity once again.

Are you sure your notify.class is an Activity/ extends an Activity class?

public class Notify extends AppCompatActivity {

}

OP. Please pay attention to what booyakasha said.

seunthomas:
a. [/b]It really does not matter if you use a GET or POST in your request. Just ensure that you send the traffic over SSL/HTTPS (this is just a minor prevention that can not stop determined Man in the middle attacks).
[b]b. [/b]SSL certificate pinning is a good way to reduce the chances of your traffic being sniffed by a third party. It can however be bypassed without much work on most rooted devices.
[b]c. Some apps do check to see if the device is rooted. If the device is rooted they wont run. This is also a precaution and combined with SSL certificate pinning will prevent about 80% of attacks.
d. Another way to mitigate attacks would be to use a shared key thats known to the server. Then encrypt all requests from the client going to the server. This is how most of the payment processors send credit card details. If on a mobile device, ensure the encryption part is done in c/c++ code. For android developers, never encrypt data in Java, always do it in c/c++. There are very good android apk to java decompilers that can convert all your code back to raw or approximate java code.
Will continue Lesson 4 later today.

thanks. I kinda like the option d, but does that mean C/C++ codes are free from being reverse engineered?.

DanielTheGeek:
That is what the Oauth authorization framework is meant for, you validate apps by sending them to the Oauth server to validate the app_token and app_scope and make sure the user gave permission to that app/person trying to connect.

By password, I guess you mean the api_secret, you should pass them through Oauth first for initial validation. Get Oauth 2.0 https://oauth.net/2/ . Another thing is, your API doesn't look properly designed (if that's the way it is in production) instead of /rest/login.php... Something like /api/v1.0/users/all... makes more sense, but if your API is private you can hard-code the credentials na, this one is public "ashewo" API... let me know if you need me to explain further.

i have actually heard about this, and i remember that i tried to wrap it into my head, but i didnt get it. So, ill be glad if you can show me the basic implementation/example. Thanks.

FincoApps:
First of all, using POST request would be better and at least remove the pasting to browser option

Secondly, this issue you just posted is actually not possible to prevent because any determined hacker would be able to reverse Engineer it.... Even Fb, WhatsApp, Twitter, Instagram, Snapchat all cannot stop it... that's why You see apps like Inst10, Snap10, FaceBox... etc all available on BlackBerry

But some ways to make it difficult:

Doing some validations on the server to check the device the request is coming from

Doing some form of Key exchange For example, when a client opens the app, it securely get's an encrypted key and that key is sent with each other request made to the server - (Just a mild sample)

Encrypting the request itself so for example you have
var postData = {};
postData["userid"] = "daddy";
postData["password"] = "finco";
postData["key"] = key;

var request = someEncryptionFunction(postData);

Then send the request variable as your request... the server would then decrypt using a common key

There are more sophisticated ways but trust me, they can all be reverse engineered and to me it's not hard to reverse engineer the communication of Applications with their server

YEAH, thanks bro. Yes, using post request can prevent the request from being made from a browser, but do you know there are apps that works on rooted phones, these apps can sniff all the network request going in-and-out of the particular phone, and a post request can be abuse by using/creating an html form that it action points to your url --<form action ='http://www.example.com/rest/login.php' method = 'POST'>....this form can contain maybe two hidden fields with the username and password as the name, values being the crazy guess they have made. What i am trying to let you understand is that, there is a way to know if a request is being manipulated i.e its not made/comes from your app and thats what am tryna figure out...i hope i make a little sense

Good Job is really going on here. I have some questions Boss. As a mobile app developer -Android, i am a noob when it comes to security, and it bother me alot. i have a software that communicate with a rest service, and i dont want some hackers to abuse my Rest Api, lets say i have a php file that handles user login with an address like --http://www.example.com/rest/login.php?user=username&pass=password, someone can just reverse engineer my app, copy the url, paste it inside a browser and maybe grab the raw json that was meant to return to the client. How do i prevent this please? Sends token to server on every http request? How do i verify the token on the backend...i have a lot of questions....THANKS.

seunthomas:
Do you know i get angry with people like you??

Its because you dont know much and you are misinforming people.

Thats why i get pissed and vexed........

Look who is call someone a retard.

By all standards am not your mate when it comes to programming so please go and look in a mirror and make that statement.

You dont need to keep telling everyone how great you are as a programmer. He thought its a waste of time trying communicate with you, then just leave him. You dont have to tell him hes a kid to you at programming. It doesnt make sense to me.