Android Tutorial for Beginners 7 # Adding Two Numbers App (Simple Calculator)

In this Android Video Tutorial we will see How to create an Android Application to Add two numbers or create a very simple basic Calculator. Adding two numbers in android using android studio will give you an actual feel of how the code logic works in Android.
We will write the Add Two Number Source code code to add two numbers. Android Application Development of Addition of Two number will not be very difficult. We will also see How to take input from users and add 2 numbers in android.
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[NoDraw]

This video helped me getting started developing android apps :) Thanks!

[nigelpallatt]

Finally got it to work, I had to enter the code before putting the button and text fields in because Andriod kept trying to help and added onButtonClick of it's own. Thanks ProgrammingKnowledge!

[kutubemuggeridge]

Finally a sample I can use... I hope the rest of your videos are like this. I've learnt more in 10mins than I have in the past few days.... THANK

[DilanTharaka]

You are the best teacher ever i have seen in youtube

[victoriadobreva]

My app also crashed and I managed to fix it with the following steps:

1.Go to the activity_main.xml file and in the bottom choose Text so that you can see your xml code

2. in the <Button> tag, or where the code for the button is, replace the existing (Main Activity)"
with


This made my app work flawlessly. I think the problem in the previous example occurred because when you paste your button from the Palette with different attributes and change the button`s properties in the right window, the xml code in the activity_main.xml file is automatically changed and written by AndroidStudio by default and this can lead to slight alterations between what you have written and what AndroidStudio has done.

I hope I was helpful :)

[tolokat]

Very clear presentation to this confusing android world. Thank you !

[rwill.]

Wow! Amazing job! I guess you could say that it's right at my level. Although not every single basic thing is explained, nearly everything that I needed to know was thoroughly explained. The text was large and clear. You didn't just write a novel and pretend that we understood, but rather, you explained what things do and how they link up. Thanks a lot! I'll continue to the next app tutorial in your series. I look forward to trying more!

[shabinp]

Thankyou very much. i made my first working app with your help.

[y]

FOR ANYONE WHO HAS ALL THE BOTTONS AND TEXT IN THE TOP LEFT
To solve this you need to do the following...
You will know that you have this problem because if you go to the text version of the xml, it will show that <EditText (or <WIDGET whatever the widget happens to be) will be underlined red
Right-click widget-in-question > Constraint Layout > Infer Constraints:

this will fix the problem.
Enjoy!

[rockymountain]

Thank you so much for these videos! They are fantastic!

[redbeardhomes]

Very good video. I really appreciate the help.

[avigeek]

sir your videos are awesome, thanks for giving us such free tutorials

[romulobianchin]

Hi, thanks so much for sharring your knowledge! Its helping me a lot!

[schmidtpeti]

You are so awesome:D honour for you because of this series

[aljohanimajed]

it is going well for me. really useful for me, thanks

[davidpalmer]

Hi First Class tutorial I would suggest perhaps as an addition the code you use to be added to the comments . Thanks for the instruction very useful

[g-ownproperties]

just following up with you bro
nice 1
GOD bless you fore me

[krishnamurti]

very very pleasure for this helping hand!

[mynameiskranz]

oh man i really enjoy your tutorial until this far!! man you are awesome!!

[vittal]

your videos are really great .
can u please help me in showing the result without button click