How to use textwatcher?

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1

How to use textwatcher to count how many characters it has in a textview, and show countdown, the same is done on facebook by limiting a post. Thank you in advance!

    
asked by anonymous 30.07.2017 / 16:30

1 answer

2

See an example of a limitation of 150 characters (visually only): 

editText.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 aft)
    {
    }

    @Override
    public void afterTextChanged(Editable s)
    {
        textView.setText(150 - s.toString().length() + "/150");
    }
});

So, soon afterwards you just have to make a condition so that you do not have to send the data if the EditText has more than the amount of characters previously defined.

See below how it would look:

    
30.07.2017 / 16:40
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