Android ClickableSpan get text onClick()

问题

I'm working on ClickableSpan in a TextView, and I'm trying to get the clicked span's text. This is my code.

// this is the text we'll be operating on
SpannableString text = new SpannableString("Lorem ipsum dolor sit amet");

// make "dolor" (characters 12 to 17) display a toast message when touched
ClickableSpan clickableSpan = new ClickableSpan() {
    @Override
    public void onClick(View view) {
        // This will get "Lorem ipsum dolor sit amet", but I just want "dolor"
        String text = ((TextView) view).getText().toString(); 
        Toast.makeText(context, text, Toast.LENGTH_LONG).show();
    }
};

text.setSpan(clickableSpan, 12, 17, 0);

As you can see, I set the clickablespan to the TextView from characters 12 to 17, and I want to get these characters in the onClick event.

Is there anyway I can do that? Or at least can I pass the 12, 17 parameter to onClick event?

Thank you!

回答1:

try this:

public class LoremIpsumSpan extends ClickableSpan {
    @Override
    public void onClick(View widget) {
        // TODO add check if widget instanceof TextView
        TextView tv = (TextView) widget;
        // TODO add check if tv.getText() instanceof Spanned
        Spanned s = (Spanned) tv.getText();
        int start = s.getSpanStart(this);
        int end = s.getSpanEnd(this);
        Log.d(TAG, "onClick [" + s.subSequence(start, end) + "]");
    }
}

回答2:

A little simpler, could also pass a model reference if necessary.

public class SpecialClickableSpan extends ClickableSpan {

    String text;

    public SpecialClickableSpan(String text){
         super();
         this.text = text;
    }

    @Override
    public void onClick(View widget) {
         Log.d(TAG, "onClick [" + text + "]");
    }
}

Then call new SpecialClickableSpan("My Text")

回答3:

Edited: previous code was wrong, this works

    // make "dolor" (characters 12 to 17) display a toast message when touched
    ClickableSpan clickableSpan = new ClickableSpan() {
        @Override
        public void onClick(View view) {
            TextView textView = (TextView) view;
            CharSequence charSequence = textView.getText();
            if (charSequence instanceof Spannable) {
                Spannable spannableText = (Spannable)charSequence;
                ClickableSpan[] spans = spannableText.getSpans(0, textView.length(), ClickableSpan.class);
                for (ClickableSpan span : spans) {
                    int start = spannableText.getSpanStart(span);
                    int end = spannableText.getSpanEnd(span);
                    Toast.makeText(MainActivity.this, charSequence.subSequence(start, end), Toast.LENGTH_LONG).show();
                }
            }
        }
    };

回答4:

You can also use to make string spannable like this

String htmlLinkText = "Lorem ipsum <a href='http://www.google.com'>dolor</a> sit amet";
    testView.setText(Html.fromHtml(htmlLinkText));
    testView.setMovementMethod(LinkMovementMethod.getInstance());

    CharSequence text = testView.getText();
    if (text instanceof Spannable) {
        int end = text.length();
        Spannable sp = (Spannable) testView.getText();
        URLSpan[] urls = sp.getSpans(0, end, URLSpan.class);
        SpannableStringBuilder style = new SpannableStringBuilder(text);
        style.clearSpans();//should clear old spans
        for (URLSpan url : urls) {
            CustomerTextClick click = new CustomerTextClick(url.getURL());
            style.setSpan(click, sp.getSpanStart(url), sp.getSpanEnd(url), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        }
        testView.setText(style);
    }

and CustomerTextClick will be

private static class CustomerTextClick extends ClickableSpan {

    private String mUrl;

    CustomerTextClick(String url) {
        mUrl = url;
    }

    @Override
    public void onClick(View widget) {
        // TODO Auto-generated method stub
        //Toast.makeText(ctx, "hello google!",Toast.LENGTH_LONG).show();
        // Do your action here
    }
}

Tested and working code.

来源：https://stackoverflow.com/questions/19750458/android-clickablespan-get-text-onclick

标签

android

onclick

textview

clickable