Question

While entering String in EditText for example “Love Is Life” , after entering word “Love” enter space , then after if click the letter ‘i’ it automatically need to change it as Uppercase letter ‘I’ .

Which means the character after every Space of String need be in Uppercase and make the change dynamically while entering character in EditText to stimulate Camel case format.

If anyone knows means help me out.

Thanks.

Answer 1

You can add a TextWatcher to an EditText and get notified each time the text is notified. Using that, you can just parse the String to find the characters after a space, and update them to uppercase.

Here’s a quick test I made which works pretty well (far from optimal, because each time you edit the Editable it calls the listener again…).

    editText.addTextChangedListener(new TextWatcher() {

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            // TODO Auto-generated method stub

        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            // TODO Auto-generated method stub

        }

        @Override
        public void afterTextChanged(Editable s) {
            String string = s.toString();
            int index = -1;
            while (((index = string.indexOf(' ', index + 1)) != -1) && (index + 1 < string.length())) {
                // Get character
                char c = string.charAt(index + 1);
                if (Character.isLowerCase(c)) {

                    // Replace in editable by uppercase version
                    s.replace(index+1, index + 2, Character.toString(c).toUpperCase());
                }
            }
        }
    });

To avoid being called to often, you could make all the changes in a char[] and only commit to the Editable if changes were made.

A simpler solution is probably to just use split(' ') on your String, replace all first letters in the String[] by the uppercase version (if needed), and commit only once to the Editable.

A simpler optimisation would be to add a boolean to your anonymous class, set it to try when you enter afterTextChanged, set it back to false when you exit it, and only process the string if the boolean is false.