Instead, compile you need to use "implementation".

Set replay speed to 0.75x

In styles.xml file, under ActionButtonStyle and NumberButtonStyle, background should be android:background and you won't have only black background. I just had the same problem and hope it helps someone searching for the fix in the comments, also unlucky I didn't come up to this earlier so you didn't have to wait for a response for 8 months. Hope you didn't give up tho! Cheers!

We are using an object called "ExpressionBuilder". Which is described in that library. Using this library we can avoid doing calculation and handling crashes and other stuff.

yeah me too..i think problem in library...but i dont know how to add library

If we set the expression on the result on click of the equal button, then when we can show the expression result?. If you want full expression, then add another TextView in between question and result. Then append the character in question as well as the new TextView. when the user clicks "CE" or after equal they press any number clear this TextView.

you need to include a library which is given in description. "implementation 'net.objecthunter:exp4j:0.4.8'"

@@CodeAndroid thanks u sir😇

You have to implement the library which is given in description. They only you will get ExpressionBuilder.

The most important thing in the entire video is implementing the library and using Expression builder , hey keep in mind in new versions of Android the word ===> compile

In the application-level gradle file, you need to place that code inside dependencies.

No. Not required.

@@CodeAndroid thnx dude

Of course, you can use it. The only problem, inside the button click we need to use a switch condition(it gets confusing). To avoid that I am using linearlayout. Thank you for supporting CodeAndroid !!! Follow me on twitter: @theCodeAndroid.

thanks for your replay sir and wish you will 100k subscriber soon :)

thank you.

this code is in libray

I don't want the look of button. So I used TextView.

Check whether you compiled or implementation 'net.objecthunter:exp4j:0.4.8' dependency in your app level gradle file.

Use a flag to control it. Reset this flag every time when we do any action. So that the flag can be ready for next number. One problem here is on press of back(erase), we need to read entire string to find dot is there in last number or not.

@@CodeAndroid can you please share the flag code

ExpressionBuilder evaluated result will have return type as Double. To check that result is having decimal value or not, I am comparing it with long value. Otherwise i need to convert both double and long to string and compare it. For numbers it is better to use the type int,float,long or double. So i converted both to double and compared it.

Did you import the library.

Yes i did

SetOnClickListener(android.view.View.OnClickListener) in View cannot be applied to (void). Sir how can i solve this error. Please reply me

I found the error in name of style items

you need to use ::class.java not .java class

same problem here

Well, I have the same issue, but I read the problem! Look, on the video it appears to use the library on the Gradle Build (Module App) Well... here;s the thing. If you just put compile 'net.objecthunter:exp4j:0.4.8' it will start to synchronize! "If you don't know how to start the Gradle Sync, there is a message right on top that says Gradle Sync - Start, click on it and then let the Gradle Begins!" Keep in mind something... if you start to sync the compile "net.objecthunter:exp4j:0.4.8" it can happen 2 things: Depending on the version of your Android Studio 1. it may start the sync, but it may not complete it, or 2. it will complete it. In my case was the first one, my Android Studio start the synchronization and after a few minutes (2mins), it stopped. But the sync chart says that the syntaxis "COMPILE" is obsolete for the current version of Android Studio 3.3, instead replace COMPILE with IMPLEMENTATION. So instead on typing "compile 'net.objecthunter:exp4j:0.4.8' " replace compile with "implementation 'net.objecthunter:exp4j:0.4.8' "

I hope that might resolve the problem you have! I am a beginner, and this calculator on Kotlin is my College Class Project and a new dare programming language from my teacher on College! I hope I was of service for you.

Thanks a lot!!!!! XD

@@jhaneman1231 heyy !! bro thanks so much bro

@@jhaneman1231 Million thanks.

вылетает, но компилятор не ругается, ошибок не видит

Yes. You can block/replace the operator by checking last character.

@@CodeAndroid can you do it for us in your video ?

Check the onclick for that button. Also check weather you are updating the textview.

Latest video I am uploading on 2K resolution. My old laptop has HD ready display. So I couldn't record more than that.

Hi, In that app itself you can add one more row with sin, cos, and tan. That library can handle that.

yes, I try it but the problem the, win I using (sin.tang or cos ) the result given with radians unite .i try to convert it to the degree but I failed (example sin30=0.5degree me sin30=-0988... radian). tvsin.setOnClickListener { appendOnExpression("sin(",false) } i try to put in the and of it but it not work

I am thankful if you give me the solution thanks

I am not the developer of that library. to check the license: www.objecthunter.net/exp4j/license.html. The library already contains √ and % functionalities.

Just to save time I make the typing faster. Beginners can pause the video once the typing is done, and intermediate people can see it on the go. in future video will try to fix this.

@@CodeAndroid okay copy that and thanks 😊 but if you wanna explain some tutorial like this don't so faster all right.

you can always play at a slower speed or press pause ;)

@@pagevpetty gues so

you can slow it down