onKeyListener not working on virtual keyboard

Ok. I finally figured how to do what I want, and I am not proud on Android for this.

I am writing server/client application where on client I have to open SoftKeyboard and send pressed keys (characters and DEL key)… Each time key is pressed, that character is sent to server. If DEL is pressed I am sending sequence {BS} to server.

In order to do that I had to implement TextWatcher and onTextChange which works well except for situation when EditText is empty and user press DEL key. Since there is no change in EditText there is no way to detect that DEL key is pressed.

In addition to TextWatcher, I had to implement onKeyListener which I attached to my EditText control. This onKeyListener ignores all keys on SoftKeyboard except DEL and RETURN. Not sure why? A bug maybe?

Here is my code:

    TextView txtInput = (TextView)findViewById(R.id.txtInput);
    txtInput.addTextChangedListener(inputTextWatcher);

    txtInput.setOnKeyListener(new View.OnKeyListener() {
        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {
            Log.d(TAG, keyCode + " character(code) to send");
            return false;
        }
    });

and TextWatcher….

private TextWatcher inputTextWatcher = new TextWatcher() {
    public void afterTextChanged(Editable s) { }
    public void beforeTextChanged(CharSequence s, int start, int count, int after)
        { }
    public void onTextChanged(CharSequence s, int start, int before, int count) {
        Log.d(TAG, s.charAt(count-1) + " character to send");;          
    }
};

Leave a Comment