textwatcher

Implementing Text Watcher for EditText

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Try like this. EditText et = (EditText)findViewById(R.id.editText); Log.e(“TextWatcherTest”, “Set text xyz”); et.setText(“xyz”); et.addTextChangedListener(new TextWatcher() { @Override public void onTextChanged(CharSequence s, int start, int before, int count) { } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void afterTextChanged(Editable s) { Log.e(“TextWatcherTest”, “afterTextChanged:\t” +s.toString()); } });

How to remove all listeners added with addTextChangedListener

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There is no way to do this using current EditText interface directly. I see two possible solutions: Redesign your application so you always know what TextWatcher are added to particular EditText instance. Extend EditText and add possibility to clear all watchers. Here is an example of second approach – ExtendedEditText: public class ExtendedEditText extends EditText … Read more

How to use Single TextWatcher for multiple EditTexts?

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I just encountered this problem. I solved it by creating an inner class implementation of TextWatcher that takes a View as an argument. Then, in the method implementation, just switch on the view to see which one the Editable is coming from Declaration: private class GenericTextWatcher implements TextWatcher{ private View view; private GenericTextWatcher(View view) { … Read more

Differences between TextWatcher ‘s onTextChanged, beforeTextChanged and afterTextChanged

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The parameters for beforeTextChanged and onTextChanged are a little hard to understand at first. It may be helpful to see them being used in an example. Watch the following demonstration a few times. Pay attention to the counts. The red highlight is the old text that is about to be replaced by the green text. … Read more

TextWatcher for more than one EditText

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Suggested solution in @Sebastian Roth’s answer is not one instance of TextWatcher for some EditTexts. It is one class and n instances of that class for n EditTexts. Each EditText has its own Spannable. TextWatcher‘s events has this Spannable as s parameter. I check their hashCode (unique Id of each object). myEditText1.getText() returns that Spannable. … Read more

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