android - 启用可访问性时使超链接可点击

Question

我正在使用 Talk/Voice Over 的可访问性使应用程序可访问。

How to make links clickable with accessibility?

使用以下方法制作 Hyperlink可点击 TextView .

/**
 * This method creates the link and associates the ClickableSpan to it.
 * Once the ClickableSpan is clicked, it will call the 
 * ClickableSpanListener.performAction
 */
public static void makeLinkClickable(
  final ClickableSpanListener clickableSpanListener,
  final SpannableStringBuilder strBuilder,
  final URLSpan span) {
final int start = strBuilder.getSpanStart(span);
final int end = strBuilder.getSpanEnd(span);
final int flags = strBuilder.getSpanFlags(span);

//get the String that is used as the link
final char[] characters = new char[end - start];
strBuilder.getChars(start, end, characters, 0);

  final ClickableSpan clickable = new ClickableSpan() {
    public void onClick(final View view) {
       clickableSpanListener.performAction(span.getURL(), new String(characters));
     }
   };
  strBuilder.setSpan(clickable, start, end, flags);
  strBuilder.removeSpan(span);
}

/**
 * This method takes in a String that contains at least one link defined by HTML <a></a> tags.
 * A link will be created in the String and added to the TextView.
 * The link will become clickable and the action (onClick) is defined by the
 * ClickableSpanListener.
 */
  public static void setTextViewHTML(
  final ClickableSpanListener clickableSpanListener,
  final TextView text,
  final String html) {
final CharSequence sequence = Html.fromHtml(html);
final SpannableStringBuilder strBuilder = new SpannableStringBuilder(sequence);
final URLSpan[] urls = strBuilder.getSpans(0, sequence.length(), URLSpan.class);
  for (final URLSpan span : urls) {
    makeLinkClickable(clickableSpanListener, strBuilder, span);
    }
   text.setText(strBuilder);
   text.setMovementMethod(LinkMovementMethod.getInstance());
 }

/**
 * This is the interface that should be implemented by classes to define the action
 * that will occur when a clickablespan is clicked
 */
 public interface ClickableSpanListener {
    void performAction(String url, String linkText);
 }


 setTextViewHTML(
    this,
    txtTermsPrivacy,
    getString(R.string.terms_condition_privacy_policy)
);

试过:

正如 google 对可访问性的支持中提到的那样 Google Support - Accessibility , 我试过使用 Linkify但它似乎不起作用。

Answer 1

如 Google Support page 中所述，用户需要访问 Local Context Menu通过 TalkBack手势(默认手势是 Swipe up then right )激活 TextView关联。

事实上，任何可点击的span在 TextView小部件可以通过 TalkBack 激活使用它的上下文菜单，甚至是不打开浏览器的链接。您对 performAction 的实现可能会显示 Toast消息，用户将能够通过上下文菜单激活。

我用 TalkBack 7.3.0 对其进行了测试在 Android 8.1与 Linkify和 android:autoLink="web" .两者都按预期工作。

<TextView
    android:id="@+id/myTextView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:autoLink="web"
    android:text="This is a TextView with link to StackOverflow: http://www.stackoverflow.com, and to Android Documentation: https://developer.android.com." />