Chrome自定义标签和textview

Question

我有一个文本视图,里面有一个链接.在代码中,我打电话setMovementMethod给用户点击文本时打开链接.但它会在默认浏览器或浏览器选择器中打开它.

如何使用带有可点击文本视图的Chrome自定义标签？

Answer 1

这是因为TextView造成URLSpan这是ClickableSpan为每个链接的文本模式.一旦MovementMethod找到url就调用了onClick方法URLSpan.此事件启动ACTION_VIEW意图,这就是您看到默认浏览器启动的原因.

您可以做的是编写自己的实现,在URLSpan那里覆盖onClick方法并CustomTabs从那里启动服务.

首先创建URLSpan将覆盖onClick方法的自定义:

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,将方法设置为链接:

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) {

    }
}

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