Chrome 自定义标签和文本视图

Question

我有一个文本视图，里面有一个 link。在代码中，当用户单击文本时，我调用 setMovementMethod 来打开 link。但它会在默认浏览器或浏览器选择器中打开它。

如何将 chrome 自定义标签与可点击的文本视图一起使用？

Answer 1

这是因为 TextView 为每个 link 文本模式创建了 URLSpan，即 ClickableSpan。一旦 MovementMethod 找到 url，它就会调用 URLSpan 的 onClick 方法。此事件启动 ACTION_VIEW 意图，这就是为什么您会看到默认浏览器启动的原因。

您可以编写自己的 URLSpan 实现，您可以在其中覆盖 onClick 方法并从那里启动 CustomTabs 服务。

首先创建将覆盖 onClick 方法的自定义 URLSpan：

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);
    }
}

创建自定义转换方法，将跨度设置为 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) {

    }
}

下面是快速解释：https://medium.com/@nullthemall/make-textview-open-links-in-customtabs-12fdcf4bb684#.ig1chpbbe

Answer 2

我对 Nikola 的回答做了一些改动，因此它仍然适用于其他 linkify 选项。

我添加了 Patterns.WEB_URL.matcher() 和一个构造函数来设置您想要的链接选项。

用法：

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

完整的 class 本身：

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) {

    }
}

Chrome 自定义标签和文本视图

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