带有可点击链接的 Android TextView: 如何捕捉点击？

小开

这可以通过使用可跨越字符串简单地解决。你真正想做什么(业务需求)对我来说有点不清楚，所以下面的代码不会给你的情况的确切答案，但我很肯定，它会给你一些想法，你将能够解决你的问题基于下面的代码。

正如你所做的，我也得到了一些数据通过 HTTP 响应，我已经添加了一些额外的 下划线文本在我的情况下 “更多”和这个带下划线的文本将打开网页浏览器的点击事件。希望这个能帮到你。

TextView decription = (TextView)convertView.findViewById(R.id.library_rss_expan_chaild_des_textView);
String dec=d.get_description()+"<a href='"+d.get_link()+"'><u>more</u></a>";
CharSequence sequence = Html.fromHtml(dec);
SpannableStringBuilder strBuilder = new SpannableStringBuilder(sequence);
UnderlineSpan[] underlines = strBuilder.getSpans(0, 10, UnderlineSpan.class);
for(UnderlineSpan span : underlines) {
int start = strBuilder.getSpanStart(span);
int end = strBuilder.getSpanEnd(span);
int flags = strBuilder.getSpanFlags(span);
ClickableSpan myActivityLauncher = new ClickableSpan() {
public void onClick(View view) {
Log.e(TAG, "on click");
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(d.get_link()));
mContext.startActivity(intent);
}
};
strBuilder.setSpan(myActivityLauncher, start, end, flags);
}
decription.setText(strBuilder);
decription.setLinksClickable(true);
decription.setMovementMethod(LinkMovementMethod.getInstance());

小开

我也遇到过同样的问题，但是大量的文本和少量的链接和电子邮件混杂在一起。我认为使用“ autoLink”是一种更简单、更干净的方式:

  text_view.setText( Html.fromHtml( str_links ) );
text_view.setLinksClickable(true);
text_view.setAutoLinkMask(Linkify.ALL); //to open links

如果只有一个 Linkify.EMAIL _ ADDRESSES 或 Linkify.WEB _ URLS，则可以设置它们您希望从 XML 布局中使用或设置

  android:linksClickable="true"
android:autoLink="web|email"

现有的选择包括: 无，网络，电子邮件，电话，地图，所有

小开

你做了以下事情:

text_view.setMovementMethod(LinkMovementMethod.getInstance());
text_view.setText( Html.fromHtml( str_links ) );

你有没有按照下面所示的倒序试过？

text_view.setText( Html.fromHtml( str_links ) );
text_view.setMovementMethod(LinkMovementMethod.getInstance());

没有:

text_view.setLinksClickable(true);

小开

最佳答案

基于另一个答案，这里有一个函数 setTextViewHTML () ，它解析 HTML 字符串中的链接并使其可单击，然后让您响应 URL。

protected void makeLinkClickable(SpannableStringBuilder strBuilder, final URLSpan span)
{
int start = strBuilder.getSpanStart(span);
int end = strBuilder.getSpanEnd(span);
int flags = strBuilder.getSpanFlags(span);
ClickableSpan clickable = new ClickableSpan() {
public void onClick(View view) {
// Do something with span.getURL() to handle the link click...
}
};
strBuilder.setSpan(clickable, start, end, flags);
strBuilder.removeSpan(span);
}


protected void setTextViewHTML(TextView text, String html)
{
CharSequence sequence = Html.fromHtml(html);
SpannableStringBuilder strBuilder = new SpannableStringBuilder(sequence);
URLSpan[] urls = strBuilder.getSpans(0, sequence.length(), URLSpan.class);
for(URLSpan span : urls) {
makeLinkClickable(strBuilder, span);
}
text.setText(strBuilder);
text.setMovementMethod(LinkMovementMethod.getInstance());
}

小开

一种更清洁和更好的解决方案，使用本地的链接库。

例如:

Linkify.addLinks(mTextView, Linkify.ALL);

小开

解决方案

我已经实现了一个小类，在它的帮助下，您可以处理 TextView 本身的长时间点击和轻击 TextView 中的链接。

布局

TextView android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:autoLink="all"/>

Java

import android.content.Context;
import android.text.Layout;
import android.text.Spannable;
import android.text.method.LinkMovementMethod;
import android.text.style.ClickableSpan;
import android.util.Patterns;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.widget.TextView;


public class TextViewClickMovement extends LinkMovementMethod {


private final String TAG = TextViewClickMovement.class.getSimpleName();


private final OnTextViewClickMovementListener mListener;
private final GestureDetector                 mGestureDetector;
private TextView                              mWidget;
private Spannable                             mBuffer;


public enum LinkType {


/** Indicates that phone link was clicked */
PHONE,


/** Identifies that URL was clicked */
WEB_URL,


/** Identifies that Email Address was clicked */
EMAIL_ADDRESS,


/** Indicates that none of above mentioned were clicked */
NONE
}


/**
* Interface used to handle Long clicks on the {@link TextView} and taps
* on the phone, web, mail links inside of {@link TextView}.
*/
public interface OnTextViewClickMovementListener {


/**
* This method will be invoked when user press and hold
* finger on the {@link TextView}
*
* @param linkText Text which contains link on which user presses.
* @param linkType Type of the link can be one of {@link LinkType} enumeration
*/
void onLinkClicked(final String linkText, final LinkType linkType);


/**
*
* @param text Whole text of {@link TextView}
*/
void onLongClick(final String text);
}




public TextViewClickMovement(final OnTextViewClickMovementListener listener, final Context context) {
mListener        = listener;
mGestureDetector = new GestureDetector(context, new SimpleOnGestureListener());
}


@Override
public boolean onTouchEvent(final TextView widget, final Spannable buffer, final MotionEvent event) {


mWidget = widget;
mBuffer = buffer;
mGestureDetector.onTouchEvent(event);


return false;
}


/**
* Detects various gestures and events.
* Notify users when a particular motion event has occurred.
*/
class SimpleOnGestureListener extends GestureDetector.SimpleOnGestureListener {
@Override
public boolean onDown(MotionEvent event) {
// Notified when a tap occurs.
return true;
}


@Override
public void onLongPress(MotionEvent e) {
// Notified when a long press occurs.
final String text = mBuffer.toString();


if (mListener != null) {
Log.d(TAG, "----> Long Click Occurs on TextView with ID: " + mWidget.getId() + "\n" +
"Text: " + text + "\n<----");


mListener.onLongClick(text);
}
}


@Override
public boolean onSingleTapConfirmed(MotionEvent event) {
// Notified when tap occurs.
final String linkText = getLinkText(mWidget, mBuffer, event);


LinkType linkType = LinkType.NONE;


if (Patterns.PHONE.matcher(linkText).matches()) {
linkType = LinkType.PHONE;
}
else if (Patterns.WEB_URL.matcher(linkText).matches()) {
linkType = LinkType.WEB_URL;
}
else if (Patterns.EMAIL_ADDRESS.matcher(linkText).matches()) {
linkType = LinkType.EMAIL_ADDRESS;
}


if (mListener != null) {
Log.d(TAG, "----> Tap Occurs on TextView with ID: " + mWidget.getId() + "\n" +
"Link Text: " + linkText + "\n" +
"Link Type: " + linkType + "\n<----");


mListener.onLinkClicked(linkText, linkType);
}


return false;
}


private String getLinkText(final TextView widget, final Spannable buffer, final MotionEvent event) {


int x = (int) event.getX();
int y = (int) event.getY();


x -= widget.getTotalPaddingLeft();
y -= widget.getTotalPaddingTop();


x += widget.getScrollX();
y += widget.getScrollY();


Layout layout = widget.getLayout();
int line = layout.getLineForVertical(y);
int off = layout.getOffsetForHorizontal(line, x);


ClickableSpan[] link = buffer.getSpans(off, off, ClickableSpan.class);


if (link.length != 0) {
return buffer.subSequence(buffer.getSpanStart(link[0]),
buffer.getSpanEnd(link[0])).toString();
}


return "";
}
}
}

用法

String str_links = "<a href='http://google.com'>Google</a><br /><a href='http://facebook.com'>Facebook</a>";
text_view.setText( Html.fromHtml( str_links ) );
text_view.setMovementMethod(new TextViewClickMovement(this, context));

连结

希望这有帮助! 您可以找到代码给你。

小开

我只使用 textView，并设置网址和句柄点击的跨度。

我发现这里非常优雅的解决方案，没有链接-根据这一点，我知道我想链接的字符串的哪一部分

处理文本视图链接点击我的 Android 应用程序

在 Kotlin:

fun linkify(view: TextView, url: String, context: Context) {


val text = view.text
val string = text.toString()
val span = ClickSpan(object : ClickSpan.OnClickListener {
override fun onClick() {
// handle your click
}
})


val start = string.indexOf(url)
val end = start + url.length
if (start == -1) return


if (text is Spannable) {
text.setSpan(span, start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
text.setSpan(ForegroundColorSpan(ContextCompat.getColor(context, R.color.orange)),
start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
} else {
val s = SpannableString.valueOf(text)
s.setSpan(span, start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
s.setSpan(ForegroundColorSpan(ContextCompat.getColor(context, R.color.orange)),
start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
view.text = s
}


val m = view.movementMethod
if (m == null || m !is LinkMovementMethod) {
view.movementMethod = LinkMovementMethod.getInstance()
}
}


class ClickSpan(private val mListener: OnClickListener) : ClickableSpan() {


override fun onClick(widget: View) {
mListener.onClick()
}


interface OnClickListener {
fun onClick()
}
}

和用法: linkify (yourTextView，urlString，context)

小开

如果你正在使用 Kotlin，我为这个案例写了一个简单的分机:

/**
* Enables click support for a TextView from a [fullText] String, which one containing one or multiple URLs.
* The [callback] will be called when a click is triggered.
*/
fun TextView.setTextWithLinkSupport(
fullText: String,
callback: (String) -> Unit
) {
val spannable = SpannableString(fullText)
val matcher = Patterns.WEB_URL.matcher(spannable)
while (matcher.find()) {
val url = spannable.toString().substring(matcher.start(), matcher.end())
val urlSpan = object : URLSpan(fullText) {
override fun onClick(widget: View) {
callback(url)
}
}
spannable.setSpan(urlSpan, matcher.start(), matcher.end(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
}
text = spannable
movementMethod = LinkMovementMethod.getInstance() // Make link clickable
}

用法:

yourTextView.setTextWithLinkSupport("click on me: https://www.google.fr") {
Log.e("URL is $it")
}

小开

我在 科特林中创建了一个简单的扩展函数，通过对 URLSpan 元素应用一个新的回调来捕获 TextView 中的 URL 链接单击。

Xml (文本中的示例链接)

<string name="link_string">this is my link: <a href="https://www.google.com/">CLICK</a></string>

在调用“ handleUrlClicks”之前，请确保将跨文本设置为 TextView

textView.text = getString(R.string.link_string)

这是扩展函数:

/**
* Searches for all URLSpans in current text replaces them with our own ClickableSpans
* forwards clicks to provided function.
*/
fun TextView.handleUrlClicks(onClicked: ((String) -> Unit)? = null) {
//create span builder and replaces current text with it
text = SpannableStringBuilder.valueOf(text).apply {
//search for all URL spans and replace all spans with our own clickable spans
getSpans(0, length, URLSpan::class.java).forEach {
//add new clickable span at the same position
setSpan(
object : ClickableSpan() {
override fun onClick(widget: View) {
onClicked?.invoke(it.url)
}
},
getSpanStart(it),
getSpanEnd(it),
Spanned.SPAN_INCLUSIVE_EXCLUSIVE
)
//remove old URLSpan
removeSpan(it)
}
}
//make sure movement method is set
movementMethod = LinkMovementMethod.getInstance()
}

我是这样称呼它的:

textView.handleUrlClicks { url ->
Timber.d("click on found span: $url")
}

小开

另一种更简单的方法(对于像我这样懒惰的开发人员;)

abstract class LinkAwareActivity : AppCompatActivity() {


override fun startActivity(intent: Intent?) {
if(Intent.ACTION_VIEW.equals(intent?.action) && onViewLink(intent?.data.toString(), intent)){
return
}


super.startActivity(intent)
}


// return true to consume the link (meaning to NOT call super.startActivity(intent))
abstract fun onViewLink(url: String?, intent: Intent?): Boolean
}

如果需要，您还可以检查意图的 scheme/imetype

小开

您可以使用一个名为 更好的链接移动方法的简单库更灵活地完成这项工作。

    TextView mTvUrl=findViewById(R.id.my_tv_url);
mTvUrl.setMovementMethod(BetterLinkMovementMethod.newInstance().setOnLinkClickListener((textView, url) -> {
              

if (Patterns.WEB_URL.matcher(url).matches()) {
//An web url is detected
return true;
}
else if(Patterns.PHONE.matcher(url).matches()){
//A phone number is detected
return true;
}
else if(Patterns.EMAIL_ADDRESS.matcher(url).matches()){
//An email address is detected
return true;
}
    

return false;
}));

小开

这页纸解决了我的问题，但我得自己想办法。我使用 android 字符串资源来设置 TextView 的文本，显然，他们返回了一个 字符序列，它在文本之间有一个链接。

这些是资源:

<string name="license_agreement">By registering, you agree with our <b><ahref="www.privacy-options.com">Privacy Policy</a></b> and <b><a href="www.terms-and-conditions.com">Terms and Conditions</a></b></string>


<string name="sign_now">Already have an account? <b><a href="@login_page">Login</a></b></string>

我修改了建议的一个代码，代码:

 @Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);


// ...


// Make Licence agreement statements and login text clickable links
setLinkOnText(binding.txtLcAgree);
setLinkOnText(binding.signNow);


}


private void detectLinkClick(SpannableStringBuilder strBuilder, final URLSpan span) {
int start = strBuilder.getSpanStart(span);
int end = strBuilder.getSpanEnd(span);
int flags = strBuilder.getSpanFlags(span);
ClickableSpan clickable = new ClickableSpan() {
public void onClick(View view) {
// Do something with links retrieved from span.getURL(), to handle link click...
String clickedUrl = span.getURL();
switch (clickedUrl) {
case "@login_page":
startActivity(new Intent(RegistrationActivity.this, LoginActivity.class));
break;
case "http://www.privacy-options.com":
Uri link1 = Uri.parse("http://www.privacy-options.com");
startActivity(new Intent(Intent.ACTION_VIEW, link1));
break;
case "http://www.terms-and-conditions.com":
Uri link2 = Uri.parse("http://www.terms-and-conditions.com");
startActivity(new Intent(Intent.ACTION_VIEW, link2));
break;
default:
Log.w(getClass().getSimpleName(), "No action for this");


}
}
};


strBuilder.setSpan(clickable, start, end, flags);
strBuilder.removeSpan(span);
}


protected void setLinkOnText(TextView text) {
CharSequence sequence = text.getText();
SpannableStringBuilder strBuilder = new SpannableStringBuilder(sequence);
URLSpan[] urls = strBuilder.getSpans(0, sequence.length(), URLSpan.class);
for (URLSpan span : urls) {
detectLinkClick(strBuilder, span);
}
text.setText(strBuilder);
text.setMovementMethod(LinkMovementMethod.getInstance());
}

从 span.getUrl()检索到的链接是我在字符串资源中设置的初始链接。由于 TextView 中的文本已经是链接格式的，所以我只是在 SpannableStringBuilder中使用了该文本。

小开

赞恩 · 克莱斯的惊人答案。在调用 strBuilder.getSpans()之前，只需要添加下面的代码就可以了。

Linkify.addLinks(strBuilder, Linkify.ALL)

小开

您需要创建一个扩展 LinkMovementMethod 并重写 onTouchEvent ()函数的类。我从 LinkMovementMethod 的方法中复制了一些代码来获取链接。

@Override
public boolean onTouchEvent(TextView widget, Spannable buffer,
MotionEvent event)
{
int action = event.getAction();


if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_DOWN) {
int x = (int) event.getX();
int y = (int) event.getY();


x -= widget.getTotalPaddingLeft();
y -= widget.getTotalPaddingTop();


x += widget.getScrollX();
y += widget.getScrollY();


Layout layout = widget.getLayout();
int line = layout.getLineForVertical(y);
int off = layout.getOffsetForHorizontal(line, x);


ClickableSpan[] links = buffer.getSpans(off, off, ClickableSpan.class);


if (links.length != 0) {
String url = ((URLSpan) links[0]).getURL());
} else {
return super.onTouchEvent(widget, buffer, event);
}
}
return super.onTouchEvent(widget, buffer, event);
}

带有可点击链接的 Android TextView: 如何捕捉点击？

示例解决方案

解决方案

布局

Java

用法

连结