Set LinkMovementMethod in LinkTextView

With ag/899084 TextView no longer automatically sets the
LinkMovementMethod when setText is called with a ClickableSpan.
So in LinkTextView we do that manually instead.

Bug: 27973982
Change-Id: I86626bd71bf2ca41cb7e73d479ba764e809b0190

src/com/android/settings/widget/LinkTextView.java

@@ -18,6 +18,9 @@ package com.android.settings.widget;
 
 import android.content.Context;
 import android.support.annotation.NonNull;
+import android.text.Spanned;
+import android.text.method.LinkMovementMethod;
+import android.text.style.ClickableSpan;
 import android.util.AttributeSet;
 import android.view.MotionEvent;
 import android.widget.TextView;
@@ -39,6 +42,18 @@ public class LinkTextView extends TextView {
         setAccessibilityDelegate(mAccessibilityHelper);
     }
 
+    @Override
+    public void setText(CharSequence text, BufferType type) {
+        super.setText(text, type);
+        if (text instanceof Spanned) {
+            final ClickableSpan[] spans =
+                    ((Spanned) text).getSpans(0, text.length(), ClickableSpan.class);
+            if (spans.length > 0) {
+                setMovementMethod(LinkMovementMethod.getInstance());
+            }
+        }
+    }
+
     @Override
     protected boolean dispatchHoverEvent(@NonNull MotionEvent event) {
         if (mAccessibilityHelper.dispatchHoverEvent(event)) {