如何在android中增加inputType密码点大小

What would be the Unicode character for big bullet in the middle of the character?

public class MypasswordTransformationMethod 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) {
            return '*'; // This is the important part
        }
        public int length() {
            return msource.length(); // Return default
        }
        public CharSequence subSequence(int start,int end) {
            return msource.subSequence(start,end); // Return default
        }
    }
}; 

text.setTransformationMethod(new MypasswordTransformationMethod());