从TextView - Android中的链接中删除下划线

Question

我使用两个textview来显示数据库的链接,我设法更改链接颜色,但我想删除下划线

email.setText(c.getString(5));
    website.setText(c.getString(6));
    Linkify.addLinks(email, Linkify.ALL);
    Linkify.addLinks(website, Linkify.ALL);

我可以从XML或代码那样做吗？

Answer 1

您可以通过URLSpan使用未加下划线的版本查找和替换实例来在代码中执行此操作.拨打电话后Linkify.addLinks(),请拨打stripUnderlines()下面粘贴的功能TextView:

    private void stripUnderlines(TextView textView) {
        Spannable s = new SpannableString(textView.getText());
        URLSpan[] spans = s.getSpans(0, s.length(), URLSpan.class);
        for (URLSpan span: spans) {
            int start = s.getSpanStart(span);
            int end = s.getSpanEnd(span);
            s.removeSpan(span);
            span = new URLSpanNoUnderline(span.getURL());
            s.setSpan(span, start, end, 0);
        }
        textView.setText(s);
    }

这需要一个自定义版本的URLSpan,它不能启用TextPaint的"下划线"属性:

    private class URLSpanNoUnderline extends URLSpan {
        public URLSpanNoUnderline(String url) {
            super(url);
        }
        @Override public void updateDrawState(TextPaint ds) {
            super.updateDrawState(ds);
            ds.setUnderlineText(false);
        }
    }

Answer 2

给出textView和内容:

TextView textView = (TextView) findViewById(R.id.your_text_view_id);
String content = "your <a href='http://some.url'>html</a> content";

以下是从超链接中删除下划线的简明方法:

Spannable s = (Spannable) Html.fromHtml(content);
for (URLSpan u: s.getSpans(0, s.length(), URLSpan.class)) {
    s.setSpan(new UnderlineSpan() {
        public void updateDrawState(TextPaint tp) {
            tp.setUnderlineText(false);
        }
    }, s.getSpanStart(u), s.getSpanEnd(u), 0);
}
textView.setText(s);

这是基于robUx4建议的方法.

为了使链接可以点击,您还需要调用:

textView.setMovementMethod(LinkMovementMethod.getInstance());

Answer 3

这是Kotlin扩展函数：

fun TextView.removeLinksUnderline() {
    val spannable = SpannableString(text)
    for (u in spannable.getSpans(0, spannable.length, URLSpan::class.java)) {
        spannable.setSpan(object : URLSpan(u.url) {
            override fun updateDrawState(ds: TextPaint) {
                super.updateDrawState(ds)
                ds.isUnderlineText = false
            }
        }, spannable.getSpanStart(u), spannable.getSpanEnd(u), 0)
    }
    text = spannable
}

用法：

txtView.removeLinksUnderline()    

Answer 4

UnderlineSpan 已经存在,但只能设置下划线.

Another solution is to add a no underline span on each existing URLSpan. Thus the underline state is disabled just before painting. This way you keep your URLSpan (possibly custom) classes and all other styles set elsewhere.

public class NoUnderlineSpan extends UnderlineSpan {
    public NoUnderlineSpan() {}

    public NoUnderlineSpan(Parcel src) {}

    @Override
    public void updateDrawState(TextPaint ds) {
        ds.setUnderlineText(false);
    }
}

Here is how you set it without removing the existing URLSpan object:

URLSpan[] spans = s.getSpans(0, s.length(), URLSpan.class);
for (URLSpan span: spans) {
    int start = s.getSpanStart(span);
    int end = s.getSpanEnd(span);
    NoUnderlineSpan noUnderline = new NoUnderlineSpan();
    s.setSpan(noUnderline, start, end, 0);
}

Answer 5

我已经实现了一个在我看来更优雅的解决方案。我做了一个定制TextView。这样您就不需要为每个TextView超链接执行额外的代码。

package com.example.view;

import android.content.Context;
import android.support.v7.widget.AppCompatTextView;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.style.URLSpan;
import android.util.AttributeSet;

import com.example.utils.UrlSpanNoUnderline;

public class TextViewNoUnderline extends AppCompatTextView {
    public TextViewNoUnderline(Context context) {
        this(context, null);
    }

    public TextViewNoUnderline(Context context, AttributeSet attrs) {
        this(context, attrs, android.R.attr.textViewStyle);
    }

    public TextViewNoUnderline(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        setSpannableFactory(Factory.getInstance());
    }

    private static class Factory extends Spannable.Factory {
        private final static Factory sInstance = new Factory();

        public static Factory getInstance() {
            return sInstance;
        }

        @Override
        public Spannable newSpannable(CharSequence source) {
            return new SpannableNoUnderline(source);
        }
    }

    private static class SpannableNoUnderline extends SpannableString {
        public SpannableNoUnderline(CharSequence source) {
            super(source);
        }

        @Override
        public void setSpan(Object what, int start, int end, int flags) {
            if (what instanceof URLSpan) {
                what = new UrlSpanNoUnderline((URLSpan) what);
            }
            super.setSpan(what, start, end, flags);
        }
    }
}

以及 UrlSpanNoUnderline 的代码：

package com.jankstudios.smmagazine.utils;

import android.text.TextPaint;
import android.text.style.URLSpan;

public class UrlSpanNoUnderline extends URLSpan {
    public UrlSpanNoUnderline(URLSpan src) {
        super(src.getURL());
    }

    @Override
    public void updateDrawState(TextPaint ds) {
        super.updateDrawState(ds);
        ds.setUnderlineText(false);
    }
}