Showing the last character of a password in an EditText

Question

I have an app where people need to login with a password. I would like for only the last character typed to be shown, but all I seem to get is all chars dots or all chars visible.

I tried a few things:

password.setInputType(InputType.TYPE_TEXT_VARIATION_PASSWORD);
password.setTransformationMethod(PasswordTransformationMethod.getInstance());
password.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);

and setting inputtype in the xml.

I have only tested on a galaxy s2 as that is the only android device at my office at the moment, so I don't know if the problem is only with my device.

edit: Just tested on an HTC Sensation from a colleague and it does work as intended on his phone, but the question remains how to get this same thing on the Galaxy S2?

Answer 1

It's been almost 1.5 years since this was asked :P. But I had the same requirement and was successfully able to implement it. Pass an object of the MyTransformation class as a parameter in the setTransformationMethod and you're good to go :) Here's the code.

public class MyTransformation extends PasswordTransformationMethod{

    @Override
    public CharSequence getTransformation(CharSequence source, View view) {
        return new PasswordCharSequence(source);
    }

    private class PasswordCharSequence implements CharSequence {
        private CharSequence mSource;
        public PasswordCharSequence(CharSequence source) {
            mSource = source; // Store char sequence
        }
        public char charAt(int index) {
        //This is the check which makes sure the last character is shown
            if(index != mSource.length()-1)
                return '•';
            else
                return mSource.charAt(index);
        }
        public int length() {
            return mSource.length(); // Return default
        }
        public CharSequence subSequence(int start, int end) {
            return mSource.subSequence(start, end); // Return default
        }
    }
}