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Questions tagged [android-textwatcher]

For questions related with TextWatcher callback interface

A special interface, that allows watching of the Editable field contents.

Has three callback methods:

  • void afterTextChanged (Editable s)
    This method is called to notify you that, somewhere within s, the text has been changed.
  • void beforeTextChanged (CharSequence s, int start, int count, int after)
    This method is called to notify you that, within s, the count characters beginning at start are about to be replaced by new text with length after. It is an error to attempt to make changes to s from this callback.
  • void onTextChanged (CharSequence s, int start, int before, int count)
    This method is called to notify you that, within s, the count characters beginning at start have just replaced old text that had length before. It is an error to attempt to make changes to s from this callback.

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205 questions
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Get data from multiple spinners generated dynamically in linearLayout

I am trying to add a dynamic view inside my LinearLayout and trying to implement something like to catch every spinner value corresponding to time. Can anyone over here can guide me that how it can be done. I am trying it but it's not working as…
user2028
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TextWatcher -related code works well only with one EditView

I have the following issue.I'm having an activity,part of an animal shelter app, where an user has to enter or edit pet-related data like weight,name and breed.What I want to achieve is to show a dialog asking if the user wants to keep editing or…
Crimson Sun
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Attempt to invoke virtual method 'void android.widget.EditText.addTextChangedListener(android.text.TextWatcher)' on a null object reference

I have spent many hours looking for a solution to this. I cannot figure out why this is a null object, and I am not sure what I am missing. If I try to make any changes to the code, it throws errors and gets me nowhere. Does anybody know what I…
Wyatt Duberstein
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how to keep button disable any editText Empty?

how to keep button disable any editText Empty ? i've try with implementation 'androidx.core:core-ktx:1.1.0': txtEmailOrNoPhone.doOnTextChanged { text, start, count, after -> if (text.toString().isEmpty()) { …
Afdal
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beginBatchEdit on inactive InputConnection, after lost focus on editText, trigger AGAIN editText onchange

My question almost same like getExtractedText on inactive InputConnection warning on android When i editText, then i trigger something/like func A. Then i press back to lost focus on editText, then it trigger editText onchange multiple times(func A…
Budi Mulyo
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How to stop trigger 'updateCursor' event in input method?

I'am using TextWatcher and onTextChanged, but when my screen scrolled it's provoke my function in editText change. holder.editTextCrt.addTextChangedListener(new TextWatcher() { boolean mToggle = false; boolean mToggle2 = false; public…
Budi Mulyo
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How to format Phone Number from PhoneNumberFormattingTextWatcher through local?

I am using Phone Number Formatting TextWatcher to format number according to given locale. my App support multiple language and i want to format phone number according to user selection like Uber app is doing for login. but Phone Number Formatting…
shafaq ahsan
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afterTextChange receiving always the same Editable instance

I faced an issue with a a custom TextWatcher in Android 10. The issue was that our custom TextWatcher was keeping a reference to the Editable passed in as a parameter of afterTextChanged. This reference was compared to the new Editable every time…
Robert Estivill
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Different behavior with diffrent device in DecimalFormat

I have an EditText that converts user input, for example, 1000000 to 1,000,000. this is the code I use as a converter: private TextWatcher onTextChangedListener(final EditText editText) { return new TextWatcher() { @Override …
Fidz
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TextWatcher afterTextChanged()'s Editable.replace() does not replace text in EditText properly

In the Android app, I have an EditText which should replace certain strings with values from app data. for e.g. if user types $username it should get replaced with the name of whichever user is currently logged in. The Editable parameter in…
Chandan Pednekar
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Change the Text color of Spinner Using Textwatcher

Hi I want to change the Spinner text color using the text watcher.Spinner text should change color based on the character entered in edittext or empty edittext.
hari86
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Auto remove leading space of any text of EditText?

Description I am developing one app in which I have registration page. Inside registration page, I am doing registration by getting user's full name and mobile number. Problem While getting user's full name in edit text sometimes the user is…
ABHAY PRATAP SINGH
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How do I validate a URL in a TextWatcher while also matching with an empty string

I have a TextWatcher that checks if a URL is valid. A URL is valid if it fulfills the URL format where "http", "https", "www", etc. are optional. It is also valid if it's an empty string. The EditText will display an error message if the URL is…
Bargain23
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How can I show in UI the limit of character and how much was digited for the user? Android Java

How can I do that? I mean showing the limit of character and how much was digited on the input text.
noone000
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Real time validation (before button click)

Is there any way to validate EditText fields in real time, before the user clicks a button. For example, if I have if (password.length() < 6) { passwordwrapper.setError("Password must have at least 6 characters"); return; } and if…
HackNode
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