How to add two numbers without using any buttons in android studio 3.5.3 | Android app video#20
In this tutorial you will How you can add two numbers without using any calculation buttons, as you start typing any number you will see the result in result text box using android studio latest version of 2020
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I have coded a program that calculates the values of 1st and 2nd text box and display the result in 3rd text box after taping the "Add" button. But I want to display the result into the 3rd text box as soon as I start typing in 1st or 2nd text box automatically, without using any buttons. I know this is possible, because many calculator apps are there, that do the expected work. My code is given bellow. Just want to remove the "ADD" button and do the calculation automatically. Please help me...
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You can use a TextWatcher. It allows us to monitor the changes made to the text in any EditText at runtime. The TextWatcher works as a listener which is attached to your EditText and provides you with the ability to monitor the changes made to the respective EditText.
It contains 3 methods, which are as follows:
1. afterTextChanged(): This method is called after the text has been changed.
2. beforeTextChanged(): This method is called when the text is about to be updated by some new text.
2. onTextChanged(): This method is called when the text is just updated.,
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