如何在Android中实现“ Rich Edittext”

Question

I am trying to implement "Rich Edittext" in android, i want to apply effect like "Bold, italic, underline, Bullet span, Number Indent span etc..." effect. So, Somehow i have completed Bold, Italic and other functionality but i am not able to complete Bullet and NumberIndent.

I did lot's of research and checked so many example and other stuff's but couldn't complete the task. I have downloaded some style class from below link but i am not able to understand how can i use this class in my code.

http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/2.3.7_r1/android/text/style/BulletSpan.java?av=f

So anyone here who have done some similar task or anything else which lead me to the right direction.

Answer 1

public class TextTypeOption {

    public final static int BOLD = 1;
    public final static int ITALIC = 2;
    public final static int UNDERLINE = 3;

    public TextTypeOption(int option) {
        this.option = option;
    }

    public int getOption() {
        return this.option
    }

    public boolean isBold() {
       return option == BOLD;
    }

    public boolean isItalic() {
       return option == ITALIC;
    }

    public boolean isUnderline() {
       return option == UNDERLINE;
    }
}

Define a TextTypeOption value :

TextTypeOption option = new TextTypeOption(TextTypeOption.BOLD);//for bold

1) use the Html.fromText(String text)

    if(option.isBold()) {
        text = text.replace(selectedText , "<b>"+ (selectedText + "</b>");
        et.setText(Html.fromHtml(text));
    }

    if(option.isItalic()) {
        text = text.replace(selectedText , "<i>"+ (selectedText + "</i>");
        et.setText(Html.fromHtml(text));
    }

    if(option.isUnderline()) {
        text = text.replace(selectedText , "<u>"+ (selectedText + "</u>");
        et.setText(Html.fromHtml(text));
    }

2) use the Spannable

    SpannableString span = new SpannableString(text);

    if(option.isUnderline()) {
        span.setSpan(new UnderlineSpan(),startSelection, endSelection , 0);
    }

    if(option.isBold()) {
        span.setSpan(new StyleSpan(Typeface.BOLD), startSelection, endSelection ,  0);
    }

    if(option.isItalic()) {
        span.setSpan(new StyleSpan(Typeface.ITALIC), startSelection, endSelection , 0);
    }
    et.setText(span, TextView.BufferType.SPANNABLE);

PS I think it's not the elegant way but it works.