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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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limiting values of edittext to certain values in android

I am using edit text in my code.I need to limit the weight value to 160 .How to achieve this. This is the XML I'm using android:id="@+id/txtWeight" android:layout_width="match_parent" …
user2852617
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Textwatcher detects empty when user input values

I have an edit-text changed listener that adds a certain text when the user removes its contents like so :- @Override public void onTextChanged(CharSequence s, int start, int before, int count) { String e = s.toString(); …
Omar Boshra
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Android - EditText TextWatcher to keep lowercase, cannot keep caret (input cursor) position

I have a form where the user can enter some data in EditText fields. One of those EditText widgets is for the email address. I am using a TextWatcher to make sure that the text is always lowercase as follows: txtEmail.addTextChangedListener(new…
MadDim
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How to implement on one method of TextWatcher in android?

I have an app in which i have lots of edit text but in some edit text i only want to implement only one method of TextWatcher. How do i do that kindly guide. code:- private TextWatcher m_textWatcher = new TextWatcher() { @Override public…
Raghav
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How to debug textwatcher in android app?

I am working on a MultiAutoCompleteTextView mactv. My purpose is to read every word added in the mactv during typing and do somethings with that word. For this, I am using TextWatcher to read the last word whenever space is typed in the mactv. The…
Vikalp Sajwan
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My apps crash due to hit backspace in inputfield due to afterTextChanged , how can i handle backspace for this code

public void afterTextChanged(Editable editable) { String f = y.getText().toString(); String[] data2 = f.split(" "); if (f.substring(f.length() - 1).equals(" ")) { StringBuilder M = new StringBuilder(); String z =…
Mian Hassan
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EditText with TextWatcher repeating after validation Android

I have a EditText with a Mask "##-###.###" and the result is 11-111.111, so I decided to use a TextWatch, so I did.. cepFrom.addTextChangedListener(new TextWatcher() { @Override public void beforeTextChanged(CharSequence s, int…
user3796130
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Use text as data for graph using TextWatcher

I am creating a Pulse rate monitoring app. The pulse rate is displayed in text which changes in realtime. I want to display the pulse rate as a graph. How can I graph from pulse rate from the text using TextWatcher? @Override final public View…
Abhi
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IndexOutOfBoundsException in TextWatcher

In my app I want to track the input in an EditText. Each time the user modifies a character in the EditText I want to track: If a character was added/deleted The index at/from which the character was added/deleted and what character was…
rbing
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Disable Post Button if Input is Empty (Android)

I have this app wherein it outputs into the list view whatever I input on the status text field. However, I need to add a function that if the status text field is empty, the POST button should not work/be disabled. I actually read about the…
lexus
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Making ListView clickable after being filtered by TextWatcher

I am pulling data from a SQLite database and storing it in an arrayList to display info on the contact through listView. The user can then type in an EditText and the TextWatcher filters the listView. But, when this happens the position of the…
KingSneaky
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How can I highlight text from listview using Textwatcher in Android?

I have created a Textwatcher for an editText where the user can search for items from a textfile. The items are splitted and in a listview. It works fine, but I want to highlight the text in the listview, that the user is searching for. Hope someone…
Flerius
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Format TextWatcher android

My FourDigitCardFormatWatcher add a space after every 4 numbers. I want to change the FourDigitCardFormatWatch to the following format 55555 5555 555 55. How can i determine after 5 numbers add a space, then after 4 digits add a space and after 3…
BigWiz
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editable.getSpans is returning a StyleSpan, even when there isn't any style rendered on screen

I am writing a RichTextEditor class, which has an inner RichTextEditorTextWatcher class. I am seeing a discrepancy from what I see on the screen, versus what I get when I call e.getSpans inside beforeTextChanged. On the screen, I see text on the…
VIN
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Android MultiThreading with afterTextChanged

i started to work with MultiThreading as and i wanted to go validate user input so i looked at the question here but still from some reason my apps crashed and i can't pinpoint to the problem RegisterActivity.Java @Override public void…
styx
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