Events Of Textwatcher Are Being Called Twice

On my application I put TextWatcher on EditText. When I change the text of the EditText, the events of TextWatcher are being called twice. I am using emulator for running the app.

Solution 1:

How does your code looks like? that is the normal behaviour of TextWatcher. Example:

myInput.addTextChangedListener(newTextWatcher() {
        booleanmToggle=false;

        publicvoidonTextChanged(CharSequence cs, int s, int b, int c) {}

        publicvoidafterTextChanged(Editable editable) {
            if (mToggle) { 
                Toast.makeText(getBaseContext(), "HIT KEY",Toast.LENGTH_LONG).show();
            }
            mToggle = !mToggle;
        }

        publicvoidbeforeTextChanged(CharSequence cs, int i, int j, int k) {}
    });

Solution 2:

My problem was I added the textWatcher twice mEditText.addTextChangedListener(mTextWatcher), which leads to calling its callbacks twice!

I had added the textWatcher once in onCreate() and once in onStart(). I should only add in onStart and remove in onStop().

Solution 3:

In case you call editText.setText("string") inside your TextWatcher listener (for example in afterTextChanged method), TextWatcher will detect a new text change, that might end up by calling again setText and create a loop.

An alternative to editText.setText("string") could be:

editText.getText().clear();
editText.append("string");

which will not evoke a new detection by the TextWatcher listener.