how to create Calculator in android studio

Let's started with our calculator android App




Hello, friends and this is my first video and I am trying my best in this video. I have to make a CALCULATOR APP in the android studio. you can learn coding in an easy way and you can make your own application through the android studio.


Step-1

  • Open your Android Studio
  • Click on Start a New Android Studio Project.
  • Give your Application Name wctutorialcalculator  and leave other fields blank as it is, then clicks NEXT.

Step-2

  • Select the Minimum SDK API 15: Android 4.0.3(IceCreamSandwich). I selected because it covers almost 94% device and it has almost all the features. If you want to cover 100% device then you can select API 8: Android 2.2(Froyo).

Step-3

  • Select the Empty Activity and click NEXT.
  • Leave the activity name MainActivity as it is and leave everything as it is. Click Finish.

Step-4

  • After clicking Finish, it takes around ~2-3 minutes to build Activity and files.
  • Here is a final project structure for your application.

Step-5

  • Now we have to add our Java code in our MainActivity.java file.
  • So open you MainActivity.java file from left side of IDE (app  -> java -> com.wctutorial.wctutorialcalculator -> MainActivity.java)



  • In-Line 156 – 183: Here we set click listener on “=” button. We put condition like if the user click the Add button the wctutorialAddition value is set True on the click listener of the Add button.





  • After we set the crunchifyAddition value to false, so that we can perform Add an action again.


Now Ready to run the calculator app.

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