Chrome自定义标签和textview

Question

I have a text view with a link inside it. In code I call the setMovementMethod to open the link when the user clicks on the text. But it opens it in the default browser or the browser chooser.

How can I use chrome custom tabs with a clickable textview?

Answer 1

This is because the TextView creates URLSpan which is ClickableSpan for each link text pattern. Once the MovementMethod finds url it calls onClick method of the URLSpan . This event starts the ACTION_VIEW intent, that's why you see the default browser starting instead.

What you could do is write your own implementation of the URLSpan , where you'd override onClick method and start the CustomTabs service from there.

First create custom URLSpan that will override onClick method:

public class CustomTabsURLSpan extends URLSpan {
    public CustomTabsURLSpan(String url) {
        super(url);
    }

    public CustomTabsURLSpan(Parcel src) {
        super(src);
    }

    @Override
    public void onClick(View widget) {
       String url = getUrl();
       //attempt to open in CustomTabs, if that fails call super.onClick(widget);
    }
}

Create custom transformation method, that will set spans to the links:

public class LinkTransformationMethod implements TransformationMethod {

    @Override
    public CharSequence getTransformation(CharSequence source, View view) {
        if (view instanceof TextView) {
            TextView textView = (TextView) view;
            Linkify.addLinks(textView, Linkify.WEB_URLS);
            String stringText = textView.getText().toString();
            Spannable text = (Spannable) textView.getText();
            URLSpan[] spans = text.getSpans(0, textView.length(), URLSpan.class);
            for (int i = spans.length - 1; i >= 0; i--) {
                URLSpan oldSpan = spans[i];
                text.removeSpan(oldSpan);
                String url = oldSpan.getURL();
                int startIndex = stringText.indexOf(url);
                int lastIndex = startIndex + url.length();
                text.setSpan(new CustomTabsURLSpan(url), startIndex, lastIndex, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
            }
            return text;
        }
        return source;
    }

    @Override
    public void onFocusChanged(View view, CharSequence sourceText, boolean focused, int direction, Rect previouslyFocusedRect) {

    }
}

And here is quick explanation: https://medium.com/@nullthemall/make-textview-open-links-in-customtabs-12fdcf4bb684#.ig1chpbbe

Answer 2

I've altered Nikola's answer a bit so that it still will work for other linkify options too.

I've added Patterns.WEB_URL.matcher() and a constructor to set which linkify options you want.

Usage:

textView.setTransformationMethod(new LinkTransformationMethod(Linkify.WEB_URLS | 
    Linkify.EMAIL_ADDRESSES | 
    Linkify.PHONE_NUMBERS));

The complete class itself:

public class LinkTransformationMethod implements TransformationMethod {

    private final int linkifyOptions;

    public LinkTransformationMethod(int linkifyOptions) {
        this.linkifyOptions = linkifyOptions;
    }

    @Override
    public CharSequence getTransformation(CharSequence source, View view) {
        if (view instanceof TextView) {
            TextView textView = (TextView) view;
            Linkify.addLinks(textView, linkifyOptions);
            if (textView.getText() == null || !(textView.getText() instanceof Spannable)) {
                return source;
            }
            Spannable text = (Spannable) textView.getText();
            URLSpan[] spans = text.getSpans(0, textView.length(), URLSpan.class);
            for (int i = spans.length - 1; i >= 0; i--) {
                URLSpan oldSpan = spans[i];
                int start = text.getSpanStart(oldSpan);
                int end = text.getSpanEnd(oldSpan);
                String url = oldSpan.getURL();
                if (!Patterns.WEB_URL.matcher(url).matches()) {
                    continue;
                }
                text.removeSpan(oldSpan);
                text.setSpan(new ChromeTabsUrlSpan(url), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
            }
            return text;
        }
        return source;
    }

    @Override
    public void onFocusChanged(View view, CharSequence sourceText, boolean focused, int direction, Rect previouslyFocusedRect) {

    }
}