How can i validate edittext input in android using kotlin?

This example demonstrates how to validate EditText input in Android using Kotlin. Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.kt
Besides, how to create Android edittext in Kotlin?
Android EditText in Kotlin. Last Updated : 18 Feb, 2021. EditText is used to get input from the user. EditText is commonly used in forms and login or registration screens. Following steps are used to create EditText in Kotlin: Add a EditText in activity_main.xml file. Add a Button in activity_main.xml file.
Also, what is edittext in Android with example? In Android, EditText is a subclass of TextView which is configured to be editable. EditText is used for giving textual input such as characters, strings, numbers, etc. It has no limitation on the type of input unless explicitly attributed. Meaning we can attribute the EditText to accept only a string or a number.
Subsequently, what is the Kotlin lambda function aftertextchanged?
Note the definition of the Kotlin lambda function afterTextChanged. It takes a string and doesn’t need a return value. This simplifies my original example to the following: This is much improved already, but I still have duplicated code. My validator is a lambda (or function) that takes a string and returns a boolean.
Similarly, how to add edittext with inputtype as a number?
Navigate to the app > res > layout > activity_main.xml and add the below code to that file. Below is the code for the activity_main.xml file. Add EditText with inputType as a number in the layout. Go to the MainActivity.kt file and refer to the following code.

20 Similar Question Found

What is the best way to validate edittext input in android using kotlin?

This example demonstrates how to validate EditText input in Android using Kotlin. Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.kt

How to validate if input in input field has integer number only?

Validate existing email, validate password length, validate confirm password, validate to allow only integer inputs, these are some examples of validation. In a certain input field, only integer numbers are allowed i.e. there not allowed any strings, special characters, or anything other than integer number.

Why does android edittext setfocusable do not work?

I was basically doing this: The problem was though that the view would get focus again, but you couldn’t type anything. I googled around for a bit and noticed this was an issue that had been previously reported, but hadn’t been fixed yet. There is a way around it however, you just have to do:

How to combine inputtype and edittext in android?

The input you’d provide to the android:inputType attribute for your EditText. These can be combined by separating them with a pipe (|). For example: * Note: Be careful how you combine these flags, though. There are no warnings when you use conflicting flags so you could end up with unexpected keyboard behavior.

How to set inputtype for an edittext programmatically?

According to the TextView docs, the programmatic version of android:password is setTransformationMethod (), not setInputType (). So something like: should do the trick. For setting the input type for an EditText programmatically, you have to specify that input class type is text.

What is the purpose of edittext in android?

In Android, EditText is a standard entry widget in android apps. It is an overlay over TextView that configures itself to be editable. EditText is a subclass of TextView with text editing operations. We often use EditText in our applications in order to provide an input or text field, especially in forms.

Where to find childstate argument in edittext class?

Horizontal layout direction of this view is from Right to Left. Bit shift of MeasuredStateMask to get to the height bits for functions that combine both width and height into a single int, such as MeasuredState and the childState argument of ResolveSizeAndState (Int32, Int32, Int32).

How to make edittext readonly uneditable in android?

This will give you uneditable EditText filter. you first need to put the text you want on the editText field and then apply this filter. writing this two line is more than enough for your work. If set, specifies that this TextView has an input method. It will be a textual one unless it has otherwise been specified.

How to get text from edittext in android?

You can simply get the text in editText by applying below code: EditText editText= (EditText)findViewById (R.id.vnosZadeve); String text=editText.getText ().toString (); then you can toast string text!

How does android edittext work with textwatcher?

Android EditText is a subclass of TextView. EditText is used for entering and modifying text. While using EditText width, we must specify its input type in inputType property of EditText which configures the keyboard according to input. EditText uses TextWatcher interface to watch change made over EditText.

How is edittext widget used in jetpack compose?

This widget is used to get the data from user in the form of numbers, text or any other text. In this article we will take a look at the implementation of the EditText widget in Android using Jetpack Compose . value is use to get the entered value from the user in the text field. has to enter in the text field.

Is it possible to make edittext uneditable in android?

You should be able to make the EditText editable/uneditable when you want. Using this: How to make EditText not editable through XML in Android? You said that you wanted your field to be editable after some logic.

How does textwatcher work with edittext on android?

EditText uses TextWatcher interface to watch change made over EditText. For doing this, EditText calls the addTextChangedListener () method.

Which is the best example of java edittext setoneditoractionlistener?

Java EditText.setOnEditorActionListener - 30 examples found. These are the top rated real world Java examples of android.widget.EditText.setOnEditorActionListener extracted from open source projects. You can rate examples to help us improve the quality of examples.

How to add edittext icon in android studio?

Please try again later. 1- Open up Android Studio and create a new project and give it a name, in our case we’ve named it (EditTextIcon), choose API 16 as the minimum SDK, then choose a blank activity, click “Finish” and wait for Android Studio to build your project.

What to do if edittext onkeylistener is not working?

So the only foolproof option here is to implement your own IME (soft keyboard), and handle the keystrokes yourself. TextWatcher can be used mostly to replace the key listeners, however editText.setText (...); will also trigger the TextWatcher events, so if one is interested in typed keys only then probably TextWatcher is not a solution either.

How to handle enter key on edittext in android kotlin language?

How to handle Enter Key on EditText in Android Kotlin Language? editText.setOnKeyListener (View.OnKeyListener { v, keyCode, event -> if (keyCode == KeyEvent.KEYCODE_ENTER && event.action == KeyEvent.ACTION_UP) { //Perform Code return@OnKeyListener true } false })

How to set hint in edittext in android?

Add hint text in edittext in android. Hint text is the normal displaying text in editText field before typing text to display a hint message that ” Type your choice here ” or ” Enter your name “,” Enter phone number”,”Enter address” etc. So you can put hint message on edittext via edittext attribute named as android:hint=”Type here your choice”.

How to compare two edittext boxes in java?

Im trying to compare the values of two edittext boxes. What i would like is to just compare passw1 = passw2. As my code is now comparing two strings i have entered as i could not get to compare them. I made a mistake earlier, because, to get the text, you need to use .getText ().toString ().

How to create edittext control in android layout file?

In android, we can create EditText control in two ways either in XML layout file or create it in Activity file programmatically. Following is the sample way to define EditText control in XML layout file in android application.