How to check if my EditText has a TextChangedListener (TextWatcher)?

Question

I know we can add a TextWatcher to EditTexts using addTextChangedListener and remove it using removeTextChangedListener. But now I want to check if my EditText has any TextWatcher or not.

How can I do that?

I have a grid. It has an adapter. My adapter checks if the type of defined item is EditText add a TextWatcher to it. When method getView is called TextWatcher is added to that EditText. I want to avoid adding extra TextWatchers if one is added.

Answer 1

Well there is work around , you can set tag to your edittext inside getview method using setTag method of View , before doing this check if getTag is not null if so you have already set TextWatcher...

if(editText object getTag is null then editText.seTtag and add watcher) else return

Answer 2

There is no API to do this specifically. Why not maintain a boolean variable, say textWatch yourself?

Every time you set a watcher, set this to true and set it to false when the watcher is removed.

You can simply check this variable to see if the editText has a watcher or not.

You can use an array of booleans if you have more than one editText boxes that need to be checked.

Answer 3

You can create a Map to store all the EditText objects that have TextWatcher's

For example

Map<EditText, Boolean> textWatcherMap = new HashMap<>();

When you add the TextWatcher to the EditText, add its reference to the HashMap.

TextWatcher textWatcher = new TextWatcher(..);
EditText editText = (EditText) findViewById(R.id.editTextId);
editText.addTextChangedListener(textWatcher);
textWatcherMap.put(editText, true);

Then when you are working on the EditText, check the HashMap for the reference

if(textWatcherMap.get(editText) != null)
    useCurrentTextWatcher();
else 
{
    addNewTextWatcher();
    textWatcherMap.put(editText, true);
}

Answer 4

you can call

edittext.removeTextChangedListener(YourWatcherObject)

before every time you add a new watcher so that it can't have more than one watcher

edittext.addTextChangedListener(YourWatcherObject)