Let talkback can identify a hyper link

Assign an URL span on the learn more text view,
so talkback can treat it as a hyperlink now.

Then, user can use three-fingers gesture to open
talkback menu.

Test: Set an action on a footer preference, and use talkabck.
Talkback speaks correct content and user can operate the talkback
menu.
Fix: 188009297

Change-Id: I33aa27cfa8e9eba95375eb361a5e035a803a9759

1 files changed, 25 insertions, 3 deletions

diff --git a/packages/SettingsLib/FooterPreference/src/com/android/settingslib/widget/FooterPreference.java b/packages/SettingsLib/FooterPreference/src/com/android/settingslib/widget/FooterPreference.java
index 33bf590cc2bb..005c75c45a46 100644
--- a/packages/SettingsLib/FooterPreference/src/com/android/settingslib/widget/FooterPreference.java
+++ b/packages/SettingsLib/FooterPreference/src/com/android/settingslib/widget/FooterPreference.java
@@ -20,7 +20,7 @@ import android.content.Context;
 import android.text.SpannableString;
 import android.text.TextUtils;
 import android.text.method.LinkMovementMethod;
-import android.text.style.UnderlineSpan;
+import android.text.style.URLSpan;
 import android.util.AttributeSet;
 import android.view.View;
 import android.widget.TextView;
@@ -67,9 +67,9 @@ public class FooterPreference extends Preference {
         TextView learnMore = holder.itemView.findViewById(R.id.settingslib_learn_more);
         if (learnMore != null && mLearnMoreListener != null) {
             learnMore.setVisibility(View.VISIBLE);
-            learnMore.setOnClickListener(mLearnMoreListener);
             SpannableString learnMoreText = new SpannableString(learnMore.getText());
-            learnMoreText.setSpan(new UnderlineSpan(), 0, learnMoreText.length(), 0);
+            learnMoreText.setSpan(new FooterLearnMoreSpan(mLearnMoreListener), 0,
+                    learnMoreText.length(), 0);
             learnMore.setText(learnMoreText);
             if (!TextUtils.isEmpty(mLearnMoreContentDescription)) {
                 learnMore.setContentDescription(mLearnMoreContentDescription);
@@ -271,4 +271,26 @@ public class FooterPreference extends Preference {
             return footerPreference;
         }
     }
+
+    /**
+     * A {@link URLSpan} that opens a support page when clicked
+     */
+    static class FooterLearnMoreSpan extends URLSpan {
+
+        private final View.OnClickListener mClickListener;
+
+        FooterLearnMoreSpan(View.OnClickListener clickListener) {
+            // sets the url to empty string so we can prevent any other span processing from
+            // clearing things we need in this string.
+            super("");
+            mClickListener = clickListener;
+        }
+
+        @Override
+        public void onClick(View widget) {
+            if (mClickListener != null) {
+                mClickListener.onClick(widget);
+            }
+        }
+    }
 }