我有一个TextView，它呈现基本的HTML，包含2个以上的链接。我需要捕获链接上的点击并打开链接 - 在我自己的内部WebView中（不在默认浏览器中）。
处理链接呈现的最常用方法似乎是这样的：
String str_links = "<a href='http://google.com'>Google</a><br /><a href='http://facebook.com'>Facebook</a>";
text_view.setLinksClickable(true);
text_view.setMovementMethod(LinkMovementMethod.getInstance());
text_view.setText( Html.fromHtml( str_links ) );
但是，这会导致链接在默认的内部Web浏览器中打开（显示“使用完整操作...”对话框）。
我尝试实现一个onClickListener，在单击链接时会正确触发，但我不知道如何确定单击了哪个链接......
text_view.setOnClickListener(new OnClickListener(){
public void onClick(View v) {
// what now...?
}
});
或者，我尝试创建自定义LinkMovementMethod类并实现onTouchEvent ......
public boolean onTouchEvent(TextView widget, Spannable text, MotionEvent event) {
String url = text.toString();
// this doesn't work because the text is not necessarily a URL, or even a single link...
// eg, I don't know how to extract the clicked link from the greater paragraph of text
return false;
}
想法？
我想出了a solution，它解析了HTML字符串中的链接并使其可以点击，然后让您回复该网址。
答案 0 :(得分：191)
基于another answer，这里有一个函数setTextViewHTML（），它解析HTML字符串中的链接并使它们可以点击，然后让你回复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());
}
答案 1 :(得分：18)
这可以通过使用Spannable String简单地解决。你真正想要做什么（业务需求）对我来说有点不清楚，所以下面的代码不会给出你的情况的确切答案，但我很小心它会给你一些想法，您将能够根据以下代码解决您的问题。
正如您所做的那样，我也通过HTTP响应获取了一些数据，我在我的案例“more”中添加了一些额外的带下划线的文本，这个带下划线的文本将会点击事件打开Web浏览器。希望这对您有所帮助。
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());
答案 2 :(得分：15)
您完成了以下操作：
text_view.setMovementMethod(LinkMovementMethod.getInstance());
text_view.setText( Html.fromHtml( str_links ) );
您是否按相反的顺序尝试了如下所示？
text_view.setText( Html.fromHtml( str_links ) );
text_view.setMovementMethod(LinkMovementMethod.getInstance());
且没有：
text_view.setLinksClickable(true);
答案 3 :(得分：11)
我遇到了同样的问题，但很多文字混合了很少的链接和电子邮件。 我认为使用'autoLink'是一种更简单，更清洁的方法：
text_view.setText( Html.fromHtml( str_links ) );
text_view.setLinksClickable(true);
text_view.setAutoLinkMask(Linkify.ALL); //to open links
如果只有其中一个，您可以设置Linkify.EMAIL_ADDRESSES或Linkify.WEB_URLS 您想要使用或设置XML布局
android:linksClickable="true"
android:autoLink="web|email"
可用选项包括： 无，网络，电子邮件，电话，地图，所有
答案 4 :(得分：8)
答案 5 :(得分：7)
我已经实现了一个小类，借助它可以处理TextView本身的长按，并点击TextView中的链接。
TextView android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:autoLink="all"/>
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 "";
}
}
}
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));
希望这有助于此！您可以找到代码here。
答案 6 :(得分：1)
如果您使用的是Kotlin，我为这种情况写了一个简单的扩展名：
/**
* 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")
}
答案 7 :(得分：1)
另一种，恕我直言的简单方法（适用于像我这样的懒惰开发人员；）
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方案/模仿类型
答案 8 :(得分：0)
我只使用textView，并设置span为url并处理click。
我在这里找到了非常优雅的解决方案，没有链接 - 根据我知道我要链接的字符串的哪一部分
handle textview link click in my android app
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）
答案 9 :(得分：0)
我在 Kotlin 中做了一个简单的扩展功能，通过对URLSpan元素应用新的回调来捕获TextView中的网址链接点击。
strings.xml（文本中的示例链接）
// You can add profile data for the user by adding more properties to your ApplicationUser class, please visit https://go.microsoft.com/fwlink/?LinkID=317594 to learn more.
public class ApplicationUser : IdentityUser
{
public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager)
{
// Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
// Add custom user claims here
return userIdentity;
}
}
public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
public ApplicationDbContext()
: base("DefaultConnection" , throwIfV1Schema: false)
{
}
public static ApplicationDbContext Create()
{
return new ApplicationDbContext();
}
//protected override void OnModelCreating(DbModelBuilder modelBuilder)
//{
// base.OnModelCreating(modelBuilder);
// modelBuilder.Entity<ApplicationUser>()
// .Property(p => p.Id)
// .HasColumnName("UserId");
//}
}
在调用“ handleUrlClicks”之前，请确保将跨文本设置为TextView。
<string name="link_string">this is my link: <a href="https://www.google.com/">CLICK</a></string>
这是扩展功能：
textView.text = getString(R.string.link_string)
这就是我所说的：
/**
* 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()
}
答案 10 :(得分：0)
您可以使用名为 Better-Link-Movement-Method 的简单库来更巧妙地完成这项工作。
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;
}));
答案 11 :(得分：0)
这个页面解决了我的问题，但我必须自己想办法。我正在使用 android 字符串资源来设置 TextView 的文本，显然，他们返回了一个 CharSequence，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>
我对建议的代码之一进行了更改。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，我只是在 SpannableStringBuilder 中使用了该文本。