userInput.setOnKeyListener(new OnKeyListener(){
        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {
            if (event.getAction() == KeyEvent.ACTION_DOWN) {
                lastInput = (char)event.getUnicodeChar();
                return false;
            }
            return true;
        }
    });

enterLetterButton.setOnClickListener(new OnClickListener(){
        public void onClick(View arg0) {

            guess(lastInput);

        }
    });

public void guess(char guess) {

    if (text.toString().indexOf(lastInput) != -1) {
        text.setSpan(new ForegroundColorSpan(Color.BLACK), 0, text.length(), 0);
    }
    // if all-show gameEnd();
    else {
        showImages();
    }
}